TW20 postcode district: Egham and around, Surrey

TW20 is a postcode district in Surrey, with 656 postcodes in use in 4 sectors. It has postcodes in Egham, Virginia Water and Staines-upon-Thames. Its council is Runnymede.

Postcodes in use
656
Sectors
4
Council
Runnymede
Places
3 places

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

Every postcode in TW20, by flood risk

Map of every postcode in TW20, by flood risk Of the 656 postcodes in TW20 that ONS places, 81 have a home or business at high risk, 63 are at medium risk at worst, 118 are at low risk at worst, 2 are at very low risk only and 392 are not on the Environment Agency's at-risk list. 3 groups of postcodes at high or medium risk are outlined: 80 postcodes at high or medium risk; 27 postcodes at high or medium risk; 5 postcodes at high or medium risk. Places named: Egham, Virginia Water. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. M25A308 TW20 0AL: not on the flood risk listTW20 0AP: not on the flood risk listTW20 0AQ: not on the flood risk listTW20 0AR: not on the flood risk listTW20 0AS: not on the flood risk listTW20 0AT: not on the flood risk listTW20 0AU: not on the flood risk listTW20 0AW: not on the flood risk listTW20 0AX: not on the flood risk listTW20 0AY: not on the flood risk listTW20 0BA: not on the flood risk listTW20 0BB: not on the flood risk listTW20 0BD: not on the flood risk listTW20 0BE: not on the flood risk listTW20 0BF: not on the flood risk listTW20 0BG: not on the flood risk listTW20 0BH: not on the flood risk listTW20 0BJ: not on the flood risk listTW20 0BN: not on the flood risk listTW20 0BP: not on the flood risk listTW20 0BQ: not on the flood risk listTW20 0BT: not on the flood risk listTW20 0BY: not on the flood risk listTW20 0BZ: not on the flood risk listTW20 0DB: not on the flood risk listTW20 0DE: not on the flood risk listTW20 0DF: not on the flood risk listTW20 0DH: not on the flood risk listTW20 0DN: not on the flood risk listTW20 0DP: not on the flood risk listTW20 0DQ: not on the flood risk listTW20 0DT: not on the flood risk listTW20 0DU: not on the flood risk listTW20 0DW: not on the flood risk listTW20 0DX: not on the flood risk listTW20 0DY: not on the flood risk listTW20 0DZ: not on the flood risk listTW20 0EA: not on the flood risk listTW20 0EB: not on the flood risk listTW20 0ED: not on the flood risk listTW20 0EE: not on the flood risk listTW20 0EG: not on the flood risk listTW20 0EH: not on the flood risk listTW20 0EJ: not on the flood risk listTW20 0EL: not on the flood risk listTW20 0EP: not on the flood risk listTW20 0EQ: not on the flood risk listTW20 0ER: not on the flood risk listTW20 0ES: not on the flood risk listTW20 0EX: not on the flood risk listTW20 0GL: not on the flood risk listTW20 0GP: not on the flood risk listTW20 0GR: not on the flood risk listTW20 0GS: not on the flood risk listTW20 0GT: not on the flood risk listTW20 0GU: not on the flood risk listTW20 0GX: not on the flood risk listTW20 0HF: not on the flood risk listTW20 0HJ: not on the flood risk listTW20 0HL: not on the flood risk listTW20 0HN: not on the flood risk listTW20 0HP: not on the flood risk listTW20 0HQ: not on the flood risk listTW20 0HR: not on the flood risk listTW20 0HS: not on the flood risk listTW20 0HT: not on the flood risk listTW20 0HU: not on the flood risk listTW20 0JB: not on the flood risk listTW20 0JF: not on the flood risk listTW20 0JG: not on the flood risk listTW20 0JH: not on the flood risk listTW20 0JJ: not on the flood risk listTW20 0JL: not on the flood risk listTW20 0JN: not on the flood risk listTW20 0JP: not on the flood risk listTW20 0JQ: not on the flood risk listTW20 0JR: not on the flood risk listTW20 0JS: not on the flood risk listTW20 0JT: not on the flood risk listTW20 0JU: not on the flood risk listTW20 0JW: not on the flood risk listTW20 0JX: not on the flood risk listTW20 0JY: not on the flood risk listTW20 0LA: not on the flood risk listTW20 0LB: not on the flood risk listTW20 0LD: not on the flood risk listTW20 0LE: not on the flood risk listTW20 0LF: not on the flood risk listTW20 0LH: not on the flood risk listTW20 0LJ: not on the flood risk listTW20 0LL: not on the flood risk listTW20 0LN: not on the flood risk listTW20 0LQ: not on the flood risk listTW20 0LR: not on the flood risk listTW20 0LS: not on the flood risk listTW20 0LT: not on the flood risk listTW20 0LU: not on the flood risk listTW20 0LW: not on the flood risk listTW20 0LX: not on the flood risk listTW20 0LY: not on the flood risk listTW20 0LZ: not on the flood risk listTW20 0NB: not on the flood risk listTW20 0ND: not on the flood risk listTW20 0NE: not on the flood risk listTW20 0NF: not on the flood risk listTW20 0NG: not on the flood risk listTW20 0NH: not on the flood risk listTW20 0NJ: not on the flood risk listTW20 0NL: not on the flood risk listTW20 0NN: not on the flood risk listTW20 0NP: not on the flood risk listTW20 0NQ: not on the flood risk listTW20 0NR: not on the flood risk listTW20 0NS: not on the flood risk listTW20 0NT: not on the flood risk listTW20 0NU: not on the flood risk listTW20 0NW: not on the flood risk listTW20 0NX: not on the flood risk listTW20 0PA: not on the flood risk listTW20 0PB: not on the flood risk listTW20 0PD: not on the flood risk listTW20 0PE: not on the flood risk listTW20 0PF: not on the flood risk listTW20 0PG: not on the flood risk listTW20 0PJ: not on the flood risk listTW20 0PL: not on the flood risk listTW20 0PN: not on the flood risk listTW20 0PP: not on the flood risk listTW20 0PQ: not on the flood risk listTW20 0PR: not on the flood risk listTW20 0PS: not on the flood risk listTW20 0PT: not on the flood risk listTW20 0PU: not on the flood risk listTW20 0PW: not on the flood risk listTW20 0PY: not on the flood risk listTW20 0PZ: not on the flood risk listTW20 0QA: not on the flood risk listTW20 0QB: not on the flood risk listTW20 0QD: not on the flood risk listTW20 0QE: not on the flood risk listTW20 0QF: not on the flood risk listTW20 0QG: not on the flood risk listTW20 0QH: not on the flood risk listTW20 0QL: not on the flood risk listTW20 0QN: not on the flood risk listTW20 0QQ: not on the flood risk listTW20 0QR: not on the flood risk listTW20 0QS: not on the flood risk listTW20 0QT: not on the flood risk listTW20 0QU: not on the flood risk listTW20 0QX: not on the flood risk listTW20 0QY: not on the flood risk listTW20 0RA: not on the flood risk listTW20 0RB: not on the flood risk listTW20 0RD: not on the flood risk listTW20 0RE: not on the flood risk listTW20 0RF: not on the flood risk listTW20 0RG: not on the flood risk listTW20 0RJ: not on the flood risk listTW20 0RL: not on the flood risk listTW20 0RN: not on the flood risk listTW20 0RP: not on the flood risk listTW20 0RR: not on the flood risk listTW20 0RS: not on the flood risk listTW20 0RT: not on the flood risk listTW20 0RU: not on the flood risk listTW20 0RW: not on the flood risk listTW20 0RX: not on the flood risk listTW20 0RY: not on the flood risk listTW20 0RZ: not on the flood risk listTW20 0SB: not on the flood risk listTW20 0SE: not on the flood risk listTW20 0SF: not on the flood risk listTW20 0SH: not on the flood risk listTW20 0SJ: not on the flood risk listTW20 0SL: not on the flood risk listTW20 0SP: not on the flood risk listTW20 0SQ: not on the flood risk listTW20 0SR: not on the flood risk listTW20 0SS: not on the flood risk listTW20 0ST: not on the flood risk listTW20 0SU: not on the flood risk listTW20 0SW: not on the flood risk listTW20 0SX: not on the flood risk listTW20 0SY: not on the flood risk listTW20 0SZ: not on the flood risk listTW20 0TA: not on the flood risk listTW20 0TB: not on the flood risk listTW20 0TD: not on the flood risk listTW20 0TE: not on the flood risk listTW20 0TF: not on the flood risk listTW20 0TG: not on the flood risk listTW20 0TH: not on the flood risk listTW20 0TJ: not on the flood risk listTW20 0TL: not on the flood risk listTW20 0TN: not on the flood risk listTW20 0TP: not on the flood risk listTW20 0TR: not on the flood risk listTW20 0TW: not on the flood risk listTW20 0TY: not on the flood risk listTW20 0TZ: not on the flood risk listTW20 0UA: not on the flood risk listTW20 0UB: not on the flood risk listTW20 0UD: not on the flood risk listTW20 0UE: not on the flood risk listTW20 0UF: not on the flood risk listTW20 0UH: not on the flood risk listTW20 0UJ: not on the flood risk listTW20 0UL: not on the flood risk listTW20 0UN: not on the flood risk listTW20 0UU: not on the flood risk listTW20 0XA: not on the flood risk listTW20 0XB: not on the flood risk listTW20 0XE: not on the flood risk listTW20 0XN: not on the flood risk listTW20 0XP: not on the flood risk listTW20 0XT: not on the flood risk listTW20 0XU: not on the flood risk listTW20 0XY: not on the flood risk listTW20 0YB: not on the flood risk listTW20 0YD: not on the flood risk listTW20 0YG: not on the flood risk listTW20 0YJ: not on the flood risk listTW20 0YL: not on the flood risk listTW20 0YN: not on the flood risk listTW20 0YS: not on the flood risk listTW20 0YT: not on the flood risk listTW20 0YU: not on the flood risk listTW20 0YW: not on the flood risk listTW20 0YX: not on the flood risk listTW20 8DQ: not on the flood risk listTW20 8EY: not on the flood risk listTW20 8EZ: not on the flood risk listTW20 8FL: not on the flood risk listTW20 8HY: not on the flood risk listTW20 8JE: not on the flood risk listTW20 8JL: not on the flood risk listTW20 8JR: not on the flood risk listTW20 8JT: not on the flood risk listTW20 8LE: not on the flood risk listTW20 8LH: not on the flood risk listTW20 8LL: not on the flood risk listTW20 8LN: not on the flood risk listTW20 8LW: not on the flood risk listTW20 8LX: not on the flood risk listTW20 8PF: not on the flood risk listTW20 8PG: not on the flood risk listTW20 8PH: not on the flood risk listTW20 8PQ: not on the flood risk listTW20 8PS: not on the flood risk listTW20 8PT: not on the flood risk listTW20 8QA: not on the flood risk listTW20 8QB: not on the flood risk listTW20 8QD: not on the flood risk listTW20 8QE: not on the flood risk listTW20 8QF: not on the flood risk listTW20 8QU: not on the flood risk listTW20 8RB: not on the flood risk listTW20 8RF: not on the flood risk listTW20 8RG: not on the flood risk listTW20 8RJ: not on the flood risk listTW20 8RY: not on the flood risk listTW20 8SJ: not on the flood risk listTW20 8SR: not on the flood risk listTW20 8TH: not on the flood risk listTW20 8UA: not on the flood risk listTW20 8UB: not on the flood risk listTW20 8UD: not on the flood risk listTW20 8UE: not on the flood risk listTW20 8UF: not on the flood risk listTW20 8UG: not on the flood risk listTW20 8UQ: not on the flood risk listTW20 8UU: not on the flood risk listTW20 9AY: not on the flood risk listTW20 9DU: not on the flood risk listTW20 9DY: not on the flood risk listTW20 9ED: not on the flood risk listTW20 9EQ: not on the flood risk listTW20 9FA: not on the flood risk listTW20 9FD: not on the flood risk listTW20 9FE: not on the flood risk listTW20 9FJ: not on the flood risk listTW20 9FL: not on the flood risk listTW20 9FN: not on the flood risk listTW20 9FP: not on the flood risk listTW20 9GA: not on the flood risk listTW20 9GE: not on the flood risk listTW20 9GF: not on the flood risk listTW20 9HN: not on the flood risk listTW20 9HP: not on the flood risk listTW20 9HZ: not on the flood risk listTW20 9JL: not on the flood risk listTW20 9LJ: not on the flood risk listTW20 9LL: not on the flood risk listTW20 9LP: not on the flood risk listTW20 9LR: not on the flood risk listTW20 9LS: not on the flood risk listTW20 9LT: not on the flood risk listTW20 9LU: not on the flood risk listTW20 9LY: not on the flood risk listTW20 9LZ: not on the flood risk listTW20 9ND: not on the flood risk listTW20 9NE: not on the flood risk listTW20 9NF: not on the flood risk listTW20 9NG: not on the flood risk listTW20 9NQ: not on the flood risk listTW20 9NZ: not on the flood risk listTW20 9PA: not on the flood risk listTW20 9PB: not on the flood risk listTW20 9PD: not on the flood risk listTW20 9PE: not on the flood risk listTW20 9PF: not on the flood risk listTW20 9PG: not on the flood risk listTW20 9PL: not on the flood risk listTW20 9PP: not on the flood risk listTW20 9PR: not on the flood risk listTW20 9PS: not on the flood risk listTW20 9PW: not on the flood risk listTW20 9PX: not on the flood risk listTW20 9PY: not on the flood risk listTW20 9QA: not on the flood risk listTW20 9QD: not on the flood risk listTW20 9QG: not on the flood risk listTW20 9QJ: not on the flood risk listTW20 9QN: not on the flood risk listTW20 9QP: not on the flood risk listTW20 9QS: not on the flood risk listTW20 9QT: not on the flood risk listTW20 9QY: not on the flood risk listTW20 9RD: not on the flood risk listTW20 9RF: not on the flood risk listTW20 9RL: not on the flood risk listTW20 9RN: not on the flood risk listTW20 9RR: not on the flood risk listTW20 9RS: not on the flood risk listTW20 9RT: not on the flood risk listTW20 9RW: not on the flood risk listTW20 9RY: not on the flood risk listTW20 9SH: not on the flood risk listTW20 9SJ: not on the flood risk listTW20 9SQ: not on the flood risk listTW20 9TN: not on the flood risk listTW20 9TS: not on the flood risk listTW20 9TT: not on the flood risk listTW20 9TU: not on the flood risk listTW20 9TZ: not on the flood risk listTW20 9UT: not on the flood risk listTW20 9UU: not on the flood risk listTW20 9UZ: not on the flood risk listTW20 9EL: very low flood risk onlyTW20 9QR: very low flood risk onlyTW20 8AP: low flood risk at worstTW20 8AR: low flood risk at worstTW20 8AS: low flood risk at worstTW20 8AX: low flood risk at worstTW20 8BL: low flood risk at worstTW20 8BN: low flood risk at worstTW20 8BT: low flood risk at worstTW20 8DL: low flood risk at worstTW20 8JH: low flood risk at worstTW20 8JJ: low flood risk at worstTW20 8JN: low flood risk at worstTW20 8JP: low flood risk at worstTW20 8JQ: low flood risk at worstTW20 8JS: low flood risk at worstTW20 8JW: low flood risk at worstTW20 8LA: low flood risk at worstTW20 8LB: low flood risk at worstTW20 8LD: low flood risk at worstTW20 8LJ: low flood risk at worstTW20 8LP: low flood risk at worstTW20 8LT: low flood risk at worstTW20 8NP: low flood risk at worstTW20 8NU: low flood risk at worstTW20 8PE: low flood risk at worstTW20 8QJ: low flood risk at worstTW20 8QL: low flood risk at worstTW20 8QN: low flood risk at worstTW20 8RD: low flood risk at worstTW20 8RE: low flood risk at worstTW20 8RN: low flood risk at worstTW20 8RX: low flood risk at worstTW20 8RZ: low flood risk at worstTW20 8TE: low flood risk at worstTW20 8TW: low flood risk at worstTW20 8TQ: low flood risk at worstTW20 9AA: low flood risk at worstTW20 9BD: low flood risk at worstTW20 9BE: low flood risk at worstTW20 9BF: low flood risk at worstTW20 9BG: low flood risk at worstTW20 9BH: low flood risk at worstTW20 9BJ: low flood risk at worstTW20 9BL: low flood risk at worstTW20 9BP: low flood risk at worstTW20 9BQ: low flood risk at worstTW20 9BS: low flood risk at worstTW20 9BT: low flood risk at worstTW20 9BW: low flood risk at worstTW20 9BX: low flood risk at worstTW20 9BZ: low flood risk at worstTW20 9DA: low flood risk at worstTW20 9DB: low flood risk at worstTW20 9DD: low flood risk at worstTW20 9DE: low flood risk at worstTW20 9DF: low flood risk at worstTW20 9DH: low flood risk at worstTW20 9DP: low flood risk at worstTW20 9DR: low flood risk at worstTW20 9DT: low flood risk at worstTW20 9DZ: low flood risk at worstTW20 9EA: low flood risk at worstTW20 9EB: low flood risk at worstTW20 9EJ: low flood risk at worstTW20 9ER: low flood risk at worstTW20 9EW: low flood risk at worstTW20 9EX: low flood risk at worstTW20 9EY: low flood risk at worstTW20 9EZ: low flood risk at worstTW20 9FF: low flood risk at worstTW20 9HB: low flood risk at worstTW20 9HY: low flood risk at worstTW20 9HE: low flood risk at worstTW20 9HF: low flood risk at worstTW20 9HQ: low flood risk at worstTW20 9JA: low flood risk at worstTW20 9JB: low flood risk at worstTW20 9JD: low flood risk at worstTW20 9JE: low flood risk at worstTW20 9JF: low flood risk at worstTW20 9JG: low flood risk at worstTW20 9JQ: low flood risk at worstTW20 9JR: low flood risk at worstTW20 9JS: low flood risk at worstTW20 9JT: low flood risk at worstTW20 9LA: low flood risk at worstTW20 9LE: low flood risk at worstTW20 9LF: low flood risk at worstTW20 9LN: low flood risk at worstTW20 9LQ: low flood risk at worstTW20 9LX: low flood risk at worstTW20 9PH: low flood risk at worstTW20 9PJ: low flood risk at worstTW20 9PN: low flood risk at worstTW20 9PQ: low flood risk at worstTW20 9QB: low flood risk at worstTW20 9QW: low flood risk at worstTW20 9QU: low flood risk at worstTW20 9QZ: low flood risk at worstTW20 9RB: low flood risk at worstTW20 9RE: low flood risk at worstTW20 9RG: low flood risk at worstTW20 9RH: low flood risk at worstTW20 9SU: low flood risk at worstTW20 9SX: low flood risk at worstTW20 9SY: low flood risk at worstTW20 9UP: low flood risk at worstTW20 9UR: low flood risk at worstTW20 9UX: low flood risk at worstTW20 8AA: medium flood risk at worstTW20 8AB: medium flood risk at worstTW20 8AE: medium flood risk at worstTW20 8AF: medium flood risk at worstTW20 8AJ: medium flood risk at worstTW20 8AY: medium flood risk at worstTW20 8AZ: medium flood risk at worstTW20 8BH: medium flood risk at worstTW20 8BJ: medium flood risk at worstTW20 8DF: medium flood risk at worstTW20 8ED: medium flood risk at worstTW20 8EE: medium flood risk at worstTW20 8EG: medium flood risk at worstTW20 8EH: medium flood risk at worstTW20 8ES: medium flood risk at worstTW20 8ET: medium flood risk at worstTW20 8HA: medium flood risk at worstTW20 8HB: medium flood risk at worstTW20 8NG: medium flood risk at worstTW20 8NH: medium flood risk at worstTW20 8NJ: medium flood risk at worstTW20 8NL: medium flood risk at worstTW20 8NN: medium flood risk at worstTW20 8NR: medium flood risk at worstTW20 8NS: medium flood risk at worstTW20 8NT: medium flood risk at worstTW20 8NX: medium flood risk at worstTW20 8QP: medium flood risk at worstTW20 8QW: medium flood risk at worstTW20 8TD: medium flood risk at worstTW20 9AB: medium flood risk at worstTW20 9AG: medium flood risk at worstTW20 9AH: medium flood risk at worstTW20 9AL: medium flood risk at worstTW20 9AR: medium flood risk at worstTW20 9AZ: medium flood risk at worstTW20 9BU: medium flood risk at worstTW20 9FB: medium flood risk at worstTW20 9GG: medium flood risk at worstTW20 9GL: medium flood risk at worstTW20 9GP: medium flood risk at worstTW20 9HA: medium flood risk at worstTW20 9HG: medium flood risk at worstTW20 9HH: medium flood risk at worstTW20 9HL: medium flood risk at worstTW20 9HR: medium flood risk at worstTW20 9HS: medium flood risk at worstTW20 9HW: medium flood risk at worstTW20 9HX: medium flood risk at worstTW20 9JH: medium flood risk at worstTW20 9JJ: medium flood risk at worstTW20 9JN: medium flood risk at worstTW20 9JP: medium flood risk at worstTW20 9JW: medium flood risk at worstTW20 9JZ: medium flood risk at worstTW20 9PZ: medium flood risk at worstTW20 9RQ: medium flood risk at worstTW20 0AA: high flood riskTW20 0AB: high flood riskTW20 0AD: high flood riskTW20 0AE: high flood riskTW20 0AG: high flood riskTW20 8AG: high flood riskTW20 8AH: high flood riskTW20 8AL: high flood riskTW20 8AN: high flood riskTW20 8AQ: high flood riskTW20 8AT: high flood riskTW20 8AU: high flood riskTW20 8AW: high flood riskTW20 8BG: high flood riskTW20 8BS: high flood riskTW20 8BW: high flood riskTW20 8BX: high flood riskTW20 8BY: high flood riskTW20 8BZ: high flood riskTW20 8DA: high flood riskTW20 8DD: high flood riskTW20 8DE: high flood riskTW20 8DG: high flood riskTW20 8DP: high flood riskTW20 8DR: high flood riskTW20 8DS: high flood riskTW20 8DT: high flood riskTW20 8DU: high flood riskTW20 8DX: high flood riskTW20 8DY: high flood riskTW20 8DZ: high flood riskTW20 8EA: high flood riskTW20 8EB: high flood riskTW20 8EF: high flood riskTW20 8EJ: high flood riskTW20 8EL: high flood riskTW20 8EN: high flood riskTW20 8EU: high flood riskTW20 8EW: high flood riskTW20 8XG: high flood riskTW20 8HD: high flood riskTW20 8HE: high flood riskTW20 8HG: high flood riskTW20 8HH: high flood riskTW20 8HJ: high flood riskTW20 8HL: high flood riskTW20 8HP: high flood riskTW20 8HR: high flood riskTW20 8HS: high flood riskTW20 8HT: high flood riskTW20 8HU: high flood riskTW20 8HX: high flood riskTW20 8JA: high flood riskTW20 8JX: high flood riskTW20 8JY: high flood riskTW20 8JZ: high flood riskTW20 8LR: high flood riskTW20 8LS: high flood riskTW20 8QH: high flood riskTW20 8QR: high flood riskTW20 8QS: high flood riskTW20 8QT: high flood riskTW20 8SH: high flood riskTW20 8SS: high flood riskTW20 8SU: high flood riskTW20 8TA: high flood riskTW20 8TG: high flood riskTW20 8XA: high flood riskTW20 8XB: high flood riskTW20 8XD: high flood riskTW20 8XE: high flood riskTW20 8XF: high flood riskTW20 9AP: high flood riskTW20 9RJ: high flood riskTW20 9TP: high flood riskTW20 9TR: high flood riskTW20 9UW: high flood risk EghamVirginia Water 27 postcodes at high or medium risk, outlined: this goes to TW20 9HW, the one with most homes and businesses at high risk27 postcodes at high or medium risk Map of every postcode in TW20, by flood risk Of the 656 postcodes in TW20 that ONS places, 81 have a home or business at high risk, 63 are at medium risk at worst, 118 are at low risk at worst, 2 are at very low risk only and 392 are not on the Environment Agency's at-risk list. 3 groups of postcodes at high or medium risk are outlined: 80 postcodes at high or medium risk; 27 postcodes at high or medium risk; 5 postcodes at high or medium risk. Places named: Egham, Virginia Water. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A30 EghamVirginia Water
  • A home or business at high risk: 81
  • At medium risk at worst: 63
  • At low risk at worst: 118
  • At very low risk only: 2
  • Not on the at-risk list: 392
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 656 postcodes in TW20 that ONS places, 81 have a home or business at high risk, 63 are at medium risk at worst, 118 are at low risk at worst, 2 are at very low risk only and 392 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 51.4275, longitude -0.5530. 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

81 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.

TW20 8AN63 at high riskTW20 8AT63 at high riskTW20 8DR55 at high riskTW20 8XA55 at high riskTW20 8BX46 at high riskTW20 8HG42 at high riskTW20 8DT41 at high riskTW20 8HQ39 at high riskTW20 8AL36 at high riskTW20 8AW34 at high riskTW20 8DX29 at high riskTW20 8HR29 at high risk

Where the postcodes at high or medium risk lie together

  • 80 postcodes at high or medium risk, outlined on the map. TW20 8AN, is the one with most homes and businesses at high risk.
  • 27 postcodes at high or medium risk, outlined on the map. TW20 9HW, is the one with most homes and businesses at high risk.
  • 5 postcodes at high or medium risk, outlined on the map. TW20 8BX, is the one with most homes and businesses at high risk.

What broadband can you get in TW20?

Ofcom reports on 630 of the 656 postcodes in TW20. At 421 of them every home and business can get gigabit broadband.

Postcodes where every home can get gigabit421 of 630
Postcodes where every home can get superfast601 of 630

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 TW20 at risk of flooding?

264 of the 656 postcodes in TW20 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 2,508 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 264 of 656 postcodes High: 1,359Medium: 1,149Low: 2,365Very low: 24

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 TW20?

Homes in TW20 sold for a typical £460,000 in the 12 months to August 2026, across 221 sales, no change on the 12 months before, HM Land Registry's figures show.

£460,000 typical price, the 12 months to August 2026
£460,000 12 months to August 2025
■ no change on the 12 months before
  • Detached £740,000 51 sales
  • Semi-detached £494,000 68 sales
  • Terraced £426,000 59 sales
  • Flat or maisonette £250,000 43 sales

Each bar is that kind's typical price, against the most expensive kind here.

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 TW20

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

TW20 0251 postcodesTW20 27 postcodesTW20 8189 postcodesTW20 9209 postcodes
UK postcode format explained

Places in TW20

Towns and villages with postcodes in TW20, and how many each has here.

Egham postcodes,561Virginia Water postcodes,6Staines-upon-Thames postcodes,5

Who covers TW20

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

  • Runnymede and Weybridge395
  • Windsor261

Police force areas

  • Surrey656

Next to TW20

TW19 postcode district TW98 postcode district All TW districts Egham postcodes

"Next to" is by number: the districts before and after TW20 in the TW area.

Check a postcode

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