SL3 postcode district: Slough and around

SL3 is a postcode district in England, with 1,077 postcodes in use in 6 sectors. It has postcodes in Slough, Datchet, Poyle and 3 more places. It is split between 3 councils: Slough (780 postcodes), Windsor and Maidenhead (171) and Buckinghamshire (126).

Postcodes in use
1,077
Sectors
6
Councils
3 councils
Places
6 places

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. See all our data sources

Every postcode in SL3, by flood risk

Map of every postcode in SL3, by flood risk Of the 1,077 postcodes in SL3 that ONS places, 124 have a home or business at high risk, 46 are at medium risk at worst, 61 are at low risk at worst, 61 are at very low risk only and 785 are not on the Environment Agency's at-risk list. 5 groups of postcodes at high or medium risk are outlined: 84 postcodes at high or medium risk; 13 postcodes at high or medium risk; 9 postcodes at high or medium risk; 9 postcodes at high or medium risk; 6 postcodes at high or medium risk. Places named: Slough, Farnham Common and Farnham Royal, Iver Heath, Datchet, Stoke Poges, Iver. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. M25A355M4A4007 SL3 0BB: not on the flood risk listSL3 0BQ: not on the flood risk listSL3 0DA: not on the flood risk listSL3 0DF: not on the flood risk listSL3 0DL: not on the flood risk listSL3 0DX: not on the flood risk listSL3 0EB: not on the flood risk listSL3 0EG: not on the flood risk listSL3 0EH: not on the flood risk listSL3 0EL: not on the flood risk listSL3 0ER: not on the flood risk listSL3 0ET: not on the flood risk listSL3 0FB: not on the flood risk listSL3 0FD: not on the flood risk listSL3 0FF: not on the flood risk listSL3 0FH: not on the flood risk listSL3 0FL: not on the flood risk listSL3 0HA: not on the flood risk listSL3 0HE: not on the flood risk listSL3 0HF: not on the flood risk listSL3 0HR: not on the flood risk listSL3 0JH: not on the flood risk listSL3 0JN: not on the flood risk listSL3 0JW: not on the flood risk listSL3 0JY: not on the flood risk listSL3 0LB: not on the flood risk listSL3 0LF: not on the flood risk listSL3 0LJ: not on the flood risk listSL3 0LL: not on the flood risk listSL3 0LP: not on the flood risk listSL3 0LQ: not on the flood risk listSL3 0LS: not on the flood risk listSL3 0LT: not on the flood risk listSL3 0LY: not on the flood risk listSL3 0NH: not on the flood risk listSL3 0NT: not on the flood risk listSL3 0PJ: not on the flood risk listSL3 0PL: not on the flood risk listSL3 0PN: not on the flood risk listSL3 0PW: not on the flood risk listSL3 0QJ: not on the flood risk listSL3 0QR: not on the flood risk listSL3 0QX: not on the flood risk listSL3 0QY: not on the flood risk listSL3 0RA: not on the flood risk listSL3 0RB: not on the flood risk listSL3 0RD: not on the flood risk listSL3 0YA: not on the flood risk listSL3 6AA: not on the flood risk listSL3 6AB: not on the flood risk listSL3 6AD: not on the flood risk listSL3 6AG: not on the flood risk listSL3 6AJ: not on the flood risk listSL3 6AS: not on the flood risk listSL3 6AT: not on the flood risk listSL3 6AU: not on the flood risk listSL3 6AW: not on the flood risk listSL3 6AX: not on the flood risk listSL3 6AY: not on the flood risk listSL3 6BD: not on the flood risk listSL3 6BE: not on the flood risk listSL3 6BG: not on the flood risk listSL3 6BH: not on the flood risk listSL3 6BJ: not on the flood risk listSL3 6BL: not on the flood risk listSL3 6BZ: not on the flood risk listSL3 6DA: not on the flood risk listSL3 6DB: not on the flood risk listSL3 6DE: not on the flood risk listSL3 6DG: not on the flood risk listSL3 6DL: not on the flood risk listSL3 6DR: not on the flood risk listSL3 6DS: not on the flood risk listSL3 6DT: not on the flood risk listSL3 6DU: not on the flood risk listSL3 6DW: not on the flood risk listSL3 6EP: not on the flood risk listSL3 6EZ: not on the flood risk listSL3 6HA: not on the flood risk listSL3 6HB: not on the flood risk listSL3 6HD: not on the flood risk listSL3 6HF: not on the flood risk listSL3 6HG: not on the flood risk listSL3 6HP: not on the flood risk listSL3 6HR: not on the flood risk listSL3 6HS: not on the flood risk listSL3 6HU: not on the flood risk listSL3 6HW: not on the flood risk listSL3 6HX: not on the flood risk listSL3 6JA: not on the flood risk listSL3 6JB: not on the flood risk listSL3 6JD: not on the flood risk listSL3 6JE: not on the flood risk listSL3 6JF: not on the flood risk listSL3 6JG: not on the flood risk listSL3 6JH: not on the flood risk listSL3 6JJ: not on the flood risk listSL3 6JL: not on the flood risk listSL3 6JN: not on the flood risk listSL3 6JQ: not on the flood risk listSL3 6LA: not on the flood risk listSL3 6LE: not on the flood risk listSL3 6LG: not on the flood risk listSL3 6LJ: not on the flood risk listSL3 6LP: not on the flood risk listSL3 6LQ: not on the flood risk listSL3 6LS: not on the flood risk listSL3 6LT: not on the flood risk listSL3 6LU: not on the flood risk listSL3 6LZ: not on the flood risk listSL3 6NA: not on the flood risk listSL3 6NB: not on the flood risk listSL3 6ND: not on the flood risk listSL3 6NH: not on the flood risk listSL3 6NJ: not on the flood risk listSL3 6NL: not on the flood risk listSL3 6NP: not on the flood risk listSL3 6NR: not on the flood risk listSL3 6NS: not on the flood risk listSL3 6NX: not on the flood risk listSL3 6NY: not on the flood risk listSL3 6NZ: not on the flood risk listSL3 6PB: not on the flood risk listSL3 6PD: not on the flood risk listSL3 6PG: not on the flood risk listSL3 6PJ: not on the flood risk listSL3 6QH: not on the flood risk listSL3 6RA: not on the flood risk listSL3 6RD: not on the flood risk listSL3 6RF: not on the flood risk listSL3 6RG: not on the flood risk listSL3 6RH: not on the flood risk listSL3 6RL: not on the flood risk listSL3 6RW: not on the flood risk listSL3 6SA: not on the flood risk listSL3 6SB: not on the flood risk listSL3 7AA: not on the flood risk listSL3 7AB: not on the flood risk listSL3 7AD: not on the flood risk listSL3 7AE: not on the flood risk listSL3 7AF: not on the flood risk listSL3 7AG: not on the flood risk listSL3 7AL: not on the flood risk listSL3 7AN: not on the flood risk listSL3 7AP: not on the flood risk listSL3 7AQ: not on the flood risk listSL3 7AR: not on the flood risk listSL3 7AS: not on the flood risk listSL3 7AT: not on the flood risk listSL3 7AU: not on the flood risk listSL3 7AX: not on the flood risk listSL3 7AY: not on the flood risk listSL3 7BA: not on the flood risk listSL3 7BB: not on the flood risk listSL3 7BD: not on the flood risk listSL3 7BE: not on the flood risk listSL3 7BH: not on the flood risk listSL3 7BJ: not on the flood risk listSL3 7BL: not on the flood risk listSL3 7BR: not on the flood risk listSL3 7BS: not on the flood risk listSL3 7BT: not on the flood risk listSL3 7BU: not on the flood risk listSL3 7BX: not on the flood risk listSL3 7BY: not on the flood risk listSL3 7DA: not on the flood risk listSL3 7DB: not on the flood risk listSL3 7DE: not on the flood risk listSL3 7DF: not on the flood risk listSL3 7DG: not on the flood risk listSL3 7DN: not on the flood risk listSL3 7DP: not on the flood risk listSL3 7DQ: not on the flood risk listSL3 7DS: not on the flood risk listSL3 7DX: not on the flood risk listSL3 7DY: not on the flood risk listSL3 7DZ: not on the flood risk listSL3 7EA: not on the flood risk listSL3 7EB: not on the flood risk listSL3 7ED: not on the flood risk listSL3 7EE: not on the flood risk listSL3 7EF: not on the flood risk listSL3 7EG: not on the flood risk listSL3 7EJ: not on the flood risk listSL3 7EL: not on the flood risk listSL3 7EN: not on the flood risk listSL3 7EQ: not on the flood risk listSL3 7ER: not on the flood risk listSL3 7ES: not on the flood risk listSL3 7EU: not on the flood risk listSL3 7EX: not on the flood risk listSL3 7EZ: not on the flood risk listSL3 7FD: not on the flood risk listSL3 7FE: not on the flood risk listSL3 7FJ: not on the flood risk listSL3 7FL: not on the flood risk listSL3 7FN: not on the flood risk listSL3 7FP: not on the flood risk listSL3 7FR: not on the flood risk listSL3 7FS: not on the flood risk listSL3 7FT: not on the flood risk listSL3 7FU: not on the flood risk listSL3 7FW: not on the flood risk listSL3 7FY: not on the flood risk listSL3 7GA: not on the flood risk listSL3 7GB: not on the flood risk listSL3 7GD: not on the flood risk listSL3 7GR: not on the flood risk listSL3 7GT: not on the flood risk listSL3 7GY: not on the flood risk listSL3 7GZ: not on the flood risk listSL3 7HA: not on the flood risk listSL3 7HB: not on the flood risk listSL3 7HF: not on the flood risk listSL3 7HH: not on the flood risk listSL3 7HP: not on the flood risk listSL3 7HR: not on the flood risk listSL3 7HS: not on the flood risk listSL3 7HT: not on the flood risk listSL3 7HU: not on the flood risk listSL3 7HX: not on the flood risk listSL3 7HY: not on the flood risk listSL3 7JA: not on the flood risk listSL3 7JG: not on the flood risk listSL3 7JJ: not on the flood risk listSL3 7JN: not on the flood risk listSL3 7JP: not on the flood risk listSL3 7JQ: not on the flood risk listSL3 7JR: not on the flood risk listSL3 7JS: not on the flood risk listSL3 7JT: not on the flood risk listSL3 7JW: not on the flood risk listSL3 7JX: not on the flood risk listSL3 7JY: not on the flood risk listSL3 7JZ: not on the flood risk listSL3 7LA: not on the flood risk listSL3 7LB: not on the flood risk listSL3 7LD: not on the flood risk listSL3 7LE: not on the flood risk listSL3 7LF: not on the flood risk listSL3 7LG: not on the flood risk listSL3 7LH: not on the flood risk listSL3 7LJ: not on the flood risk listSL3 7LN: not on the flood risk listSL3 7LS: not on the flood risk listSL3 7LX: not on the flood risk listSL3 7LY: not on the flood risk listSL3 7LZ: not on the flood risk listSL3 7NE: not on the flood risk listSL3 7NG: not on the flood risk listSL3 7NJ: not on the flood risk listSL3 7NL: not on the flood risk listSL3 7NN: not on the flood risk listSL3 7NU: not on the flood risk listSL3 7NW: not on the flood risk listSL3 7NX: not on the flood risk listSL3 7NY: not on the flood risk listSL3 7NZ: not on the flood risk listSL3 7PB: not on the flood risk listSL3 7PD: not on the flood risk listSL3 7PE: not on the flood risk listSL3 7PF: not on the flood risk listSL3 7PG: not on the flood risk listSL3 7PH: not on the flood risk listSL3 7PJ: not on the flood risk listSL3 7PL: not on the flood risk listSL3 7PN: not on the flood risk listSL3 7PS: not on the flood risk listSL3 7PU: not on the flood risk listSL3 7PW: not on the flood risk listSL3 7PY: not on the flood risk listSL3 7PZ: not on the flood risk listSL3 7QA: not on the flood risk listSL3 7QB: not on the flood risk listSL3 7QD: not on the flood risk listSL3 7QF: not on the flood risk listSL3 7QG: not on the flood risk listSL3 7QH: not on the flood risk listSL3 7QJ: not on the flood risk listSL3 7QL: not on the flood risk listSL3 7QN: not on the flood risk listSL3 7QP: not on the flood risk listSL3 7QR: not on the flood risk listSL3 7QT: not on the flood risk listSL3 7QU: not on the flood risk listSL3 7QW: not on the flood risk listSL3 7QX: not on the flood risk listSL3 7QZ: not on the flood risk listSL3 7RA: not on the flood risk listSL3 7RB: not on the flood risk listSL3 7RD: not on the flood risk listSL3 7RE: not on the flood risk listSL3 7RF: not on the flood risk listSL3 7RG: not on the flood risk listSL3 7RH: not on the flood risk listSL3 7RJ: not on the flood risk listSL3 7RL: not on the flood risk listSL3 7RP: not on the flood risk listSL3 7RQ: not on the flood risk listSL3 7RR: not on the flood risk listSL3 7RS: not on the flood risk listSL3 7RT: not on the flood risk listSL3 7RU: not on the flood risk listSL3 7RW: not on the flood risk listSL3 7RX: not on the flood risk listSL3 7RY: not on the flood risk listSL3 7RZ: not on the flood risk listSL3 7SA: not on the flood risk listSL3 7SB: not on the flood risk listSL3 7SD: not on the flood risk listSL3 7SE: not on the flood risk listSL3 7SF: not on the flood risk listSL3 7SG: not on the flood risk listSL3 7SJ: not on the flood risk listSL3 7SL: not on the flood risk listSL3 7SN: not on the flood risk listSL3 7SQ: not on the flood risk listSL3 7SR: not on the flood risk listSL3 7SU: not on the flood risk listSL3 7SY: not on the flood risk listSL3 7SZ: not on the flood risk listSL3 7TA: not on the flood risk listSL3 7TB: not on the flood risk listSL3 7TD: not on the flood risk listSL3 7TF: not on the flood risk listSL3 7TG: not on the flood risk listSL3 7TH: not on the flood risk listSL3 7TJ: not on the flood risk listSL3 7TL: not on the flood risk listSL3 7TN: not on the flood risk listSL3 7TP: not on the flood risk listSL3 7TQ: not on the flood risk listSL3 7TS: not on the flood risk listSL3 7TT: not on the flood risk listSL3 7TU: not on the flood risk listSL3 7TW: not on the flood risk listSL3 7TX: not on the flood risk listSL3 7TY: not on the flood risk listSL3 7TZ: not on the flood risk listSL3 7UB: not on the flood risk listSL3 7UD: not on the flood risk listSL3 7UE: not on the flood risk listSL3 7UJ: not on the flood risk listSL3 7UQ: not on the flood risk listSL3 7UW: not on the flood risk listSL3 7UX: not on the flood risk listSL3 7XA: not on the flood risk listSL3 8AA: not on the flood risk listSL3 8AD: not on the flood risk listSL3 8AE: not on the flood risk listSL3 8AF: not on the flood risk listSL3 8AG: not on the flood risk listSL3 8AH: not on the flood risk listSL3 8AJ: not on the flood risk listSL3 8AL: not on the flood risk listSL3 8AN: not on the flood risk listSL3 8AP: not on the flood risk listSL3 8AQ: not on the flood risk listSL3 8AR: not on the flood risk listSL3 8AS: not on the flood risk listSL3 8AU: not on the flood risk listSL3 8AX: not on the flood risk listSL3 8AY: not on the flood risk listSL3 8AZ: not on the flood risk listSL3 8BA: not on the flood risk listSL3 8BB: not on the flood risk listSL3 8BD: not on the flood risk listSL3 8BE: not on the flood risk listSL3 8BG: not on the flood risk listSL3 8BH: not on the flood risk listSL3 8BJ: not on the flood risk listSL3 8BL: not on the flood risk listSL3 8BN: not on the flood risk listSL3 8BP: not on the flood risk listSL3 8BQ: not on the flood risk listSL3 8BS: not on the flood risk listSL3 8BT: not on the flood risk listSL3 8BU: not on the flood risk listSL3 8BY: not on the flood risk listSL3 8BZ: not on the flood risk listSL3 8DA: not on the flood risk listSL3 8DB: not on the flood risk listSL3 8DD: not on the flood risk listSL3 8DE: not on the flood risk listSL3 8DF: not on the flood risk listSL3 8DG: not on the flood risk listSL3 8DH: not on the flood risk listSL3 8DJ: not on the flood risk listSL3 8DL: not on the flood risk listSL3 8DP: not on the flood risk listSL3 8DQ: not on the flood risk listSL3 8DS: not on the flood risk listSL3 8DU: not on the flood risk listSL3 8DW: not on the flood risk listSL3 8DX: not on the flood risk listSL3 8DY: not on the flood risk listSL3 8DZ: not on the flood risk listSL3 8EA: not on the flood risk listSL3 8EB: not on the flood risk listSL3 8ED: not on the flood risk listSL3 8EE: not on the flood risk listSL3 8EF: not on the flood risk listSL3 8EG: not on the flood risk listSL3 8EH: not on the flood risk listSL3 8EJ: not on the flood risk listSL3 8EL: not on the flood risk listSL3 8EP: not on the flood risk listSL3 8EQ: not on the flood risk listSL3 8ER: not on the flood risk listSL3 8ET: not on the flood risk listSL3 8EW: not on the flood risk listSL3 8EX: not on the flood risk listSL3 8EY: not on the flood risk listSL3 8EZ: not on the flood risk listSL3 8FA: not on the flood risk listSL3 8FB: not on the flood risk listSL3 8FP: not on the flood risk listSL3 8GB: not on the flood risk listSL3 8GF: not on the flood risk listSL3 8GH: not on the flood risk listSL3 8GP: not on the flood risk listSL3 8GW: not on the flood risk listSL3 8GX: not on the flood risk listSL3 8GY: not on the flood risk listSL3 8HA: not on the flood risk listSL3 8HD: not on the flood risk listSL3 8HF: not on the flood risk listSL3 8HJ: not on the flood risk listSL3 8HL: not on the flood risk listSL3 8HP: not on the flood risk listSL3 8HR: not on the flood risk listSL3 8HS: not on the flood risk listSL3 8HT: not on the flood risk listSL3 8HU: not on the flood risk listSL3 8HW: not on the flood risk listSL3 8HX: not on the flood risk listSL3 8JA: not on the flood risk listSL3 8JD: not on the flood risk listSL3 8JE: not on the flood risk listSL3 8JF: not on the flood risk listSL3 8JG: not on the flood risk listSL3 8JH: not on the flood risk listSL3 8JJ: not on the flood risk listSL3 8JL: not on the flood risk listSL3 8JN: not on the flood risk listSL3 8JP: not on the flood risk listSL3 8JQ: not on the flood risk listSL3 8JR: not on the flood risk listSL3 8JS: not on the flood risk listSL3 8JT: not on the flood risk listSL3 8JU: not on the flood risk listSL3 8JW: not on the flood risk listSL3 8JX: not on the flood risk listSL3 8JY: not on the flood risk listSL3 8JZ: not on the flood risk listSL3 8LA: not on the flood risk listSL3 8LE: not on the flood risk listSL3 8LG: not on the flood risk listSL3 8LH: not on the flood risk listSL3 8LJ: not on the flood risk listSL3 8LL: not on the flood risk listSL3 8LN: not on the flood risk listSL3 8LP: not on the flood risk listSL3 8LS: not on the flood risk listSL3 8LT: not on the flood risk listSL3 8LW: not on the flood risk listSL3 8LY: not on the flood risk listSL3 8LZ: not on the flood risk listSL3 8NA: not on the flood risk listSL3 8NB: not on the flood risk listSL3 8ND: not on the flood risk listSL3 8NE: not on the flood risk listSL3 8NF: not on the flood risk listSL3 8NG: not on the flood risk listSL3 8NH: not on the flood risk listSL3 8NJ: not on the flood risk listSL3 8NL: not on the flood risk listSL3 8NN: not on the flood risk listSL3 8NP: not on the flood risk listSL3 8NQ: not on the flood risk listSL3 8NR: not on the flood risk listSL3 8NS: not on the flood risk listSL3 8NZ: not on the flood risk listSL3 8PA: not on the flood risk listSL3 8PB: not on the flood risk listSL3 8PE: not on the flood risk listSL3 8PF: not on the flood risk listSL3 8PG: not on the flood risk listSL3 8PN: not on the flood risk listSL3 8PP: not on the flood risk listSL3 8PQ: not on the flood risk listSL3 8PR: not on the flood risk listSL3 8PT: not on the flood risk listSL3 8PU: not on the flood risk listSL3 8PW: not on the flood risk listSL3 8PX: not on the flood risk listSL3 8PY: not on the flood risk listSL3 8PZ: not on the flood risk listSL3 8QB: not on the flood risk listSL3 8QD: not on the flood risk listSL3 8QE: not on the flood risk listSL3 8QF: not on the flood risk listSL3 8QG: not on the flood risk listSL3 8QJ: not on the flood risk listSL3 8QL: not on the flood risk listSL3 8QN: not on the flood risk listSL3 8QP: not on the flood risk listSL3 8QR: not on the flood risk listSL3 8QS: not on the flood risk listSL3 8QT: not on the flood risk listSL3 8QU: not on the flood risk listSL3 8QY: not on the flood risk listSL3 8RA: not on the flood risk listSL3 8RB: not on the flood risk listSL3 8RD: not on the flood risk listSL3 8RG: not on the flood risk listSL3 8RH: not on the flood risk listSL3 8RJ: not on the flood risk listSL3 8RL: not on the flood risk listSL3 8RP: not on the flood risk listSL3 8RQ: not on the flood risk listSL3 8RR: not on the flood risk listSL3 8RS: not on the flood risk listSL3 8RT: not on the flood risk listSL3 8RW: not on the flood risk listSL3 8RX: not on the flood risk listSL3 8RY: not on the flood risk listSL3 8RZ: not on the flood risk listSL3 8SA: not on the flood risk listSL3 8SB: not on the flood risk listSL3 8SD: not on the flood risk listSL3 8SE: not on the flood risk listSL3 8SG: not on the flood risk listSL3 8SH: not on the flood risk listSL3 8SR: not on the flood risk listSL3 8SS: not on the flood risk listSL3 8ST: not on the flood risk listSL3 8SU: not on the flood risk listSL3 8SX: not on the flood risk listSL3 8SY: not on the flood risk listSL3 8SZ: not on the flood risk listSL3 8TA: not on the flood risk listSL3 8TB: not on the flood risk listSL3 8TN: not on the flood risk listSL3 8TT: not on the flood risk listSL3 8TX: not on the flood risk listSL3 8TZ: not on the flood risk listSL3 8UA: not on the flood risk listSL3 8UD: not on the flood risk listSL3 8UE: not on the flood risk listSL3 8UG: not on the flood risk listSL3 8UH: not on the flood risk listSL3 8UP: not on the flood risk listSL3 8UQ: not on the flood risk listSL3 8UR: not on the flood risk listSL3 8US: not on the flood risk listSL3 8UT: not on the flood risk listSL3 8UU: not on the flood risk listSL3 8UY: not on the flood risk listSL3 8UZ: not on the flood risk listSL3 8WE: not on the flood risk listSL3 8WF: not on the flood risk listSL3 8WG: not on the flood risk listSL3 8WN: not on the flood risk listSL3 8WQ: not on the flood risk listSL3 8WW: not on the flood risk listSL3 8WY: not on the flood risk listSL3 8WZ: not on the flood risk listSL3 8XA: not on the flood risk listSL3 8XB: not on the flood risk listSL3 8XP: not on the flood risk listSL3 8XX: not on the flood risk listSL3 8XY: not on the flood risk listSL3 8XZ: not on the flood risk listSL3 8YA: not on the flood risk listSL3 8YB: not on the flood risk listSL3 8YE: not on the flood risk listSL3 8YF: not on the flood risk listSL3 8YG: not on the flood risk listSL3 9BU: not on the flood risk listSL3 9GL: not on the flood risk listSL3 9JY: not on the flood risk listSL3 9NB: not on the flood risk listSL3 9NR: not on the flood risk listSL3 9NS: not on the flood risk listSL3 9PF: not on the flood risk listSL3 9PL: not on the flood risk listSL3 9QR: not on the flood risk listSL3 0AA: very low flood risk onlySL3 0AE: very low flood risk onlySL3 0AH: very low flood risk onlySL3 0AL: very low flood risk onlySL3 0AP: very low flood risk onlySL3 0AW: very low flood risk onlySL3 0AX: very low flood risk onlySL3 0AY: very low flood risk onlySL3 0BH: very low flood risk onlySL3 0BL: very low flood risk onlySL3 0BN: very low flood risk onlySL3 0BS: very low flood risk onlySL3 0DB: very low flood risk onlySL3 0DG: very low flood risk onlySL3 0DP: very low flood risk onlySL3 0DQ: very low flood risk onlySL3 0EZ: very low flood risk onlySL3 0FJ: very low flood risk onlySL3 0HJ: very low flood risk onlySL3 0HQ: very low flood risk onlySL3 0HT: very low flood risk onlySL3 0JB: very low flood risk onlySL3 0JD: very low flood risk onlySL3 0JE: very low flood risk onlySL3 0JJ: very low flood risk onlySL3 0NU: very low flood risk onlySL3 0NW: very low flood risk onlySL3 0PS: very low flood risk onlySL3 0QT: very low flood risk onlySL3 0SB: very low flood risk onlySL3 0TW: very low flood risk onlySL3 7GE: very low flood risk onlySL3 7GF: very low flood risk onlySL3 7GG: very low flood risk onlySL3 7GL: very low flood risk onlySL3 7GQ: very low flood risk onlySL3 7GU: very low flood risk onlySL3 7GW: very low flood risk onlySL3 7HZ: very low flood risk onlySL3 7JB: very low flood risk onlySL3 7LU: very low flood risk onlySL3 7UG: very low flood risk onlySL3 7UN: very low flood risk onlySL3 9AB: very low flood risk onlySL3 9AD: very low flood risk onlySL3 9JF: very low flood risk onlySL3 9JS: very low flood risk onlySL3 9JT: very low flood risk onlySL3 9JW: very low flood risk onlySL3 9NU: very low flood risk onlySL3 9PH: very low flood risk onlySL3 9PP: very low flood risk onlySL3 9PY: very low flood risk onlySL3 9QD: very low flood risk onlySL3 0AQ: low flood risk at worstSL3 0EA: low flood risk at worstSL3 0EN: low flood risk at worstSL3 0HX: low flood risk at worstSL3 0HZ: low flood risk at worstSL3 0JA: low flood risk at worstSL3 0JT: low flood risk at worstSL3 0LN: low flood risk at worstSL3 0NJ: low flood risk at worstSL3 0NN: low flood risk at worstSL3 0NX: low flood risk at worstSL3 0NZ: low flood risk at worstSL3 0PA: low flood risk at worstSL3 0PP: low flood risk at worstSL3 0PQ: low flood risk at worstSL3 0PY: low flood risk at worstSL3 0QE: low flood risk at worstSL3 0QQ: low flood risk at worstSL3 6BY: low flood risk at worstSL3 6DD: low flood risk at worstSL3 6EG: low flood risk at worstSL3 6EY: low flood risk at worstSL3 6HL: low flood risk at worstSL3 6HN: low flood risk at worstSL3 6LY: low flood risk at worstSL3 6QB: low flood risk at worstSL3 6QF: low flood risk at worstSL3 7DT: low flood risk at worstSL3 7FX: low flood risk at worstSL3 7HQ: low flood risk at worstSL3 7JF: low flood risk at worstSL3 7NQ: low flood risk at worstSL3 9AZ: low flood risk at worstSL3 9BT: low flood risk at worstSL3 9DA: low flood risk at worstSL3 9EE: low flood risk at worstSL3 9FA: low flood risk at worstSL3 9JP: low flood risk at worstSL3 9JR: low flood risk at worstSL3 9JZ: low flood risk at worstSL3 9LQ: low flood risk at worstSL3 9NE: low flood risk at worstSL3 9NF: low flood risk at worstSL3 9NG: low flood risk at worstSL3 9NH: low flood risk at worstSL3 9NJ: low flood risk at worstSL3 9NQ: low flood risk at worstSL3 9PT: low flood risk at worstSL3 9PA: low flood risk at worstSL3 9PB: low flood risk at worstSL3 9PW: low flood risk at worstSL3 0AU: medium flood risk at worstSL3 0HS: medium flood risk at worstSL3 0JS: medium flood risk at worstSL3 0QW: medium flood risk at worstSL3 0PZ: medium flood risk at worstSL3 0QB: medium flood risk at worstSL3 0QD: medium flood risk at worstSL3 0QF: medium flood risk at worstSL3 6AR: medium flood risk at worstSL3 6BU: medium flood risk at worstSL3 6DH: medium flood risk at worstSL3 6HJ: medium flood risk at worstSL3 9AA: medium flood risk at worstSL3 9AW: medium flood risk at worstSL3 9BB: medium flood risk at worstSL3 9BG: medium flood risk at worstSL3 9BQ: medium flood risk at worstSL3 9BR: medium flood risk at worstSL3 9BW: medium flood risk at worstSL3 9BX: medium flood risk at worstSL3 9DH: medium flood risk at worstSL3 9DQ: medium flood risk at worstSL3 9EP: medium flood risk at worstSL3 9EQ: medium flood risk at worstSL3 9HB: medium flood risk at worstSL3 9HU: medium flood risk at worstSL3 9JA: medium flood risk at worstSL3 9JD: medium flood risk at worstSL3 9JN: medium flood risk at worstSL3 9LH: medium flood risk at worstSL3 9PG: medium flood risk at worstSL3 9PQ: medium flood risk at worstSL3 9PX: medium flood risk at worstSL3 9QA: medium flood risk at worstSL3 9RB: medium flood risk at worstSL3 0AT: high flood riskSL3 0ED: high flood riskSL3 0NG: high flood riskSL3 0JP: high flood riskSL3 0JU: high flood riskSL3 0JZ: high flood riskSL3 0ND: high flood riskSL3 0LU: high flood riskSL3 0LX: high flood riskSL3 0NF: high flood riskSL3 0RL: high flood riskSL3 6AE: high flood riskSL3 6AN: high flood riskSL3 6AP: high flood riskSL3 6BS: high flood riskSL3 6LF: high flood riskSL3 6LH: high flood riskSL3 6LL: high flood riskSL3 6LN: high flood riskSL3 6LX: high flood riskSL3 6QA: high flood riskSL3 6QD: high flood riskSL3 6QE: high flood riskSL3 6QJ: high flood riskSL3 7DJ: high flood riskSL3 7FG: high flood riskSL3 7FQ: high flood riskSL3 7HN: high flood riskSL3 7JL: high flood riskSL3 7LT: high flood riskSL3 7NA: high flood riskSL3 7NB: high flood riskSL3 7ND: high flood riskSL3 7NT: high flood riskSL3 8AB: high flood riskSL3 9AE: high flood riskSL3 9AG: high flood riskSL3 9AH: high flood riskSL3 9AL: high flood riskSL3 9AN: high flood riskSL3 9AP: high flood riskSL3 9AR: high flood riskSL3 9AS: high flood riskSL3 9AX: high flood riskSL3 9AY: high flood riskSL3 9BA: high flood riskSL3 9BE: high flood riskSL3 9BP: high flood riskSL3 9BS: high flood riskSL3 9BY: high flood riskSL3 9BZ: high flood riskSL3 9DB: high flood riskSL3 9DD: high flood riskSL3 9DE: high flood riskSL3 9DJ: high flood riskSL3 9DL: high flood riskSL3 9DN: high flood riskSL3 9DR: high flood riskSL3 9DS: high flood riskSL3 9DT: high flood riskSL3 9DW: high flood riskSL3 9DX: high flood riskSL3 9DY: high flood riskSL3 9EA: high flood riskSL3 9EG: high flood riskSL3 9EH: high flood riskSL3 9EN: high flood riskSL3 9ER: high flood riskSL3 9EU: high flood riskSL3 9EW: high flood riskSL3 9EX: high flood riskSL3 9HA: high flood riskSL3 9HD: high flood riskSL3 9HE: high flood riskSL3 9HG: high flood riskSL3 9HH: high flood riskSL3 9HJ: high flood riskSL3 9HL: high flood riskSL3 9HN: high flood riskSL3 9HP: high flood riskSL3 9HQ: high flood riskSL3 9HR: high flood riskSL3 9HS: high flood riskSL3 9HT: high flood riskSL3 9HW: high flood riskSL3 9HX: high flood riskSL3 9HY: high flood riskSL3 9JE: high flood riskSL3 9JH: high flood riskSL3 9JQ: high flood riskSL3 9JL: high flood riskSL3 9LB: high flood riskSL3 9LD: high flood riskSL3 9LL: high flood riskSL3 9LS: high flood riskSL3 9LT: high flood riskSL3 9LU: high flood riskSL3 9LX: high flood riskSL3 9LY: high flood riskSL3 9LZ: high flood riskSL3 9NT: high flood riskSL3 9PE: high flood riskSL3 9PJ: high flood riskSL3 9PR: high flood riskSL3 9QU: high flood riskSL3 9QY: high flood riskSL3 9QZ: high flood riskSL3 9RA: high flood risk SloughFarnham Common and Farnham RoyalIver HeathDatchetStoke PogesIver 84 postcodes at high or medium risk, outlined: this goes to SL3 9HS, the one with most homes and businesses at high risk84 postcodes at high or medium risk13 postcodes at high or medium risk, outlined: this goes to SL3 9AL, the one with most homes and businesses at high risk13 postcodes at high or medium risk9 postcodes at high or medium risk, outlined: this goes to SL3 0NF, the one with most homes and businesses at high risk9 postcodes at high or medium risk9 postcodes at high or medium risk, outlined: this goes to SL3 7FG, the one with most homes and businesses at high risk9 postcodes at high or medium risk6 postcodes at high or medium risk, outlined: this goes to SL3 0QB, the one with most homes and businesses at high risk6 postcodes at high or medium risk Map of every postcode in SL3, by flood risk Of the 1,077 postcodes in SL3 that ONS places, 124 have a home or business at high risk, 46 are at medium risk at worst, 61 are at low risk at worst, 61 are at very low risk only and 785 are not on the Environment Agency's at-risk list. 5 groups of postcodes at high or medium risk are outlined: 84 postcodes at high or medium risk; 13 postcodes at high or medium risk; 9 postcodes at high or medium risk; 9 postcodes at high or medium risk; 6 postcodes at high or medium risk. Places named: Slough, Iver Heath, Datchet, Stoke Poges. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2 km. M25M40 SloughIver HeathDatchetStoke Poges
  • A home or business at high risk: 124
  • At medium risk at worst: 46
  • At low risk at worst: 61
  • At very low risk only: 61
  • Not on the at-risk list: 785
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 1,077 postcodes in SL3 that ONS places, 124 have a home or business at high risk, 46 are at medium risk at worst, 61 are at low risk at worst, 61 are at very low risk only and 785 are not on the Environment Agency's at-risk list.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. A dashed outline shows where 5 or more lie within 150 metres of each other. It is not a boundary, and no boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

The middle of its postcodes: latitude 51.4987, longitude -0.5513. Open this area on OpenStreetMap

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

The postcodes at high risk

124 postcodes here have a home or business at high risk. These are the 12 with the most homes and businesses at that risk.

Beside each: how many of its homes and businesses the Environment Agency puts at that risk.

SL3 9HS39 at high riskSL3 9DD35 at high riskSL3 9QU34 at high riskSL3 9HH32 at high riskSL3 9HZ32 at high riskSL3 9AL31 at high riskSL3 9EX30 at high riskSL3 9EW29 at high riskSL3 9HG28 at high riskSL3 9AQ22 at high riskSL3 9HL22 at high riskSL3 9BY22 at high risk

Where the postcodes at high or medium risk lie together

  • 84 postcodes at high or medium risk, outlined on the map. SL3 9HS, is the one with most homes and businesses at high risk.
  • 13 postcodes at high or medium risk, outlined on the map. SL3 9AL, is the one with most homes and businesses at high risk.
  • 9 postcodes at high or medium risk, outlined on the map. SL3 0NF, is the one with most homes and businesses at high risk.
  • 9 postcodes at high or medium risk, outlined on the map. SL3 7FG, is the one with most homes and businesses at high risk.
  • 6 postcodes at high or medium risk, outlined on the map. SL3 0QB, is the one with most homes and businesses at high risk.

What broadband can you get in SL3?

Ofcom reports on 1,034 of the 1,077 postcodes in SL3. At 792 of them every home and business can get gigabit broadband, and at 3 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit792 of 1,034
Postcodes where every home can get superfast964 of 1,034
Postcodes where some cannot get decent broadband3 of 1,034

Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.

Check one address on Ofcom's checker

Source: Ofcom, Connected Nations, Spring 2026, data for January 2026, Open Government Licence v3.0. How we use it

Is SL3 at risk of flooding?

292 of the 1,077 postcodes in SL3 have a home or business in an area at risk of flooding from rivers or the sea, the Environment Agency says. At those, it puts 1,925 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 292 of 1,077 postcodes High: 1,136Medium: 789Low: 1,328Very low: 803

High: 3.3% or more a year (1 in 30). Medium: 1% to 3.3% a year. Low: 0.1% to 1% a year. Very low: under 0.1% a year (1 in 1,000). Each band is the chance of flooding in any one year.

Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.

Source: Environment Agency, Risk of Flooding from Rivers and Sea (postcodes in areas at risk), published 6 July 2026, Open Government Licence v3.0. How we use it

What do homes sell for in SL3?

Homes in SL3 sold for a typical £450,000 in the 12 months to August 2026, across 289 sales, no change on the 12 months before, HM Land Registry's figures show.

£450,000 typical price, the 12 months to August 2026
12 months to August 2025
£450,000
12 months to August 2026
£450,000

■ no change on the 12 months before

Detached£775,000 45 sales
Semi-detached£550,000 90 sales
Terraced£419,000 89 sales
Flat or maisonette£247,500 65 sales

Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.

Source: HM Land Registry Price Paid Data, files dated 28 September 2026. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0. How we use it

Postcodes in SL3

Pick a sector, then a postcode. A sector is the district plus the next digit.

SL3 0162 postcodesSL3 312 postcodesSL3 6141 postcodesSL3 7297 postcodesSL3 8294 postcodesSL3 9171 postcodes
UK postcode format explained

Places in SL3

Towns and villages with postcodes in SL3, and how many each has here.

Slough postcodes,646Datchet postcodes,135Poyle postcodes,88Colnbrook postcodes,62Hillingdon postcodes,7Stoke Poges postcodes,2

Who covers SL3

How many of the district's postcodes in use fall under each council, constituency and police force area.

Councils

What council am I in?

Constituencies

  • Windsor611
  • Slough340
  • Beaconsfield126

Police force areas

  • Thames Valley1,077

Next to SL3

SL2 postcode district SL4 postcode district All SL districts Slough postcodes

"Next to" is by number: the districts before and after SL3 in the SL area.

Check a postcode

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