CH4 postcode district: Chester and around

CH4 is a postcode district mostly in England, with 922 postcodes in use in 4 sectors. It has postcodes in Chester, Broughton and Penyffordd. It is split between 2 councils: Cheshire West and Chester (484 postcodes) and Flintshire (438). It crosses a national border: 484 are in England and 438 in Wales.

Postcodes in use
922
Sectors
4
Councils
2 councils
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 CH4, by flood risk

Map of every postcode in CH4, by flood risk Of the 484 postcodes in CH4 in England that ONS places, 9 have a home or business at high risk, 19 are at medium risk at worst, 12 are at low risk at worst, 11 are at very low risk only and 433 are not on the Environment Agency's at-risk list. The other 438 are in Wales or Scotland, which the Environment Agency's list does not cover. One group of postcodes at high or medium risk is outlined: 18 postcodes at high or medium risk. Places named: Chester, Hawarden, Broughton, Penyffordd, Aston. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. A483A548A550 CH4 0AA: not covered by the flood listCH4 0AB: not covered by the flood listCH4 0AD: not covered by the flood listCH4 0AE: not covered by the flood listCH4 0AF: not covered by the flood listCH4 0AG: not covered by the flood listCH4 0AH: not covered by the flood listCH4 0AJ: not covered by the flood listCH4 0AL: not covered by the flood listCH4 0AN: not covered by the flood listCH4 0AP: not covered by the flood listCH4 0AQ: not covered by the flood listCH4 0AS: not covered by the flood listCH4 0AT: not covered by the flood listCH4 0AU: not covered by the flood listCH4 0AW: not covered by the flood listCH4 0AX: not covered by the flood listCH4 0AY: not covered by the flood listCH4 0AZ: not covered by the flood listCH4 0BB: not covered by the flood listCH4 0BG: not covered by the flood listCH4 0BH: not covered by the flood listCH4 0BJ: not covered by the flood listCH4 0BL: not covered by the flood listCH4 0BN: not covered by the flood listCH4 0BP: not covered by the flood listCH4 0BQ: not covered by the flood listCH4 0BT: not covered by the flood listCH4 0BU: not covered by the flood listCH4 0BX: not covered by the flood listCH4 0BY: not covered by the flood listCH4 0BZ: not covered by the flood listCH4 0DA: not covered by the flood listCH4 0DB: not covered by the flood listCH4 0DE: not covered by the flood listCH4 0DF: not covered by the flood listCH4 0DH: not covered by the flood listCH4 0DL: not covered by the flood listCH4 0DN: not covered by the flood listCH4 0DQ: not covered by the flood listCH4 0DR: not covered by the flood listCH4 0DT: not covered by the flood listCH4 0DU: not covered by the flood listCH4 0DW: not covered by the flood listCH4 0DX: not covered by the flood listCH4 0DZ: not covered by the flood listCH4 0EB: not covered by the flood listCH4 0ED: not covered by the flood listCH4 0EE: not covered by the flood listCH4 0EF: not covered by the flood listCH4 0EG: not covered by the flood listCH4 0EH: not covered by the flood listCH4 0EL: not covered by the flood listCH4 0EN: not covered by the flood listCH4 0EP: not covered by the flood listCH4 0EQ: not covered by the flood listCH4 0ER: not covered by the flood listCH4 0ES: not covered by the flood listCH4 0ET: not covered by the flood listCH4 0EU: not covered by the flood listCH4 0EW: not covered by the flood listCH4 0EX: not covered by the flood listCH4 0EY: not covered by the flood listCH4 0EZ: not covered by the flood listCH4 0FA: not covered by the flood listCH4 0FB: not covered by the flood listCH4 0FD: not covered by the flood listCH4 0FE: not covered by the flood listCH4 0FG: not covered by the flood listCH4 0FH: not covered by the flood listCH4 0FP: not covered by the flood listCH4 0FQ: not covered by the flood listCH4 0FR: not covered by the flood listCH4 0FS: not covered by the flood listCH4 0FT: not covered by the flood listCH4 0FW: not covered by the flood listCH4 0FX: not covered by the flood listCH4 0FY: not covered by the flood listCH4 0FZ: not covered by the flood listCH4 0GA: not covered by the flood listCH4 0GB: not covered by the flood listCH4 0GD: not covered by the flood listCH4 0GG: not covered by the flood listCH4 0GH: not covered by the flood listCH4 0GJ: not covered by the flood listCH4 0GL: not covered by the flood listCH4 0GN: not covered by the flood listCH4 0GP: not covered by the flood listCH4 0GQ: not covered by the flood listCH4 0GS: not covered by the flood listCH4 0GX: not covered by the flood listCH4 0GY: not covered by the flood listCH4 0HB: not covered by the flood listCH4 0HD: not covered by the flood listCH4 0HE: not covered by the flood listCH4 0HF: not covered by the flood listCH4 0HG: not covered by the flood listCH4 0HH: not covered by the flood listCH4 0HJ: not covered by the flood listCH4 0HL: not covered by the flood listCH4 0HN: not covered by the flood listCH4 0HP: not covered by the flood listCH4 0HR: not covered by the flood listCH4 0HS: not covered by the flood listCH4 0HT: not covered by the flood listCH4 0HU: not covered by the flood listCH4 0HW: not covered by the flood listCH4 0HX: not covered by the flood listCH4 0HY: not covered by the flood listCH4 0JB: not covered by the flood listCH4 0JF: not covered by the flood listCH4 0JG: not covered by the flood listCH4 0JH: not covered by the flood listCH4 0JJ: not covered by the flood listCH4 0JL: not covered by the flood listCH4 0JP: not covered by the flood listCH4 0JQ: not covered by the flood listCH4 0JU: not covered by the flood listCH4 0JW: not covered by the flood listCH4 0JX: not covered by the flood listCH4 0JY: not covered by the flood listCH4 0JZ: not covered by the flood listCH4 0LB: not covered by the flood listCH4 0LD: not covered by the flood listCH4 0LE: not covered by the flood listCH4 0LG: not covered by the flood listCH4 0LL: not covered by the flood listCH4 0LN: not covered by the flood listCH4 0LP: not covered by the flood listCH4 0LQ: not covered by the flood listCH4 0LR: not covered by the flood listCH4 0LT: not covered by the flood listCH4 0LU: not covered by the flood listCH4 0LY: not covered by the flood listCH4 0NA: not covered by the flood listCH4 0NE: not covered by the flood listCH4 0NF: not covered by the flood listCH4 0NG: not covered by the flood listCH4 0NH: not covered by the flood listCH4 0NN: not covered by the flood listCH4 0NP: not covered by the flood listCH4 0NQ: not covered by the flood listCH4 0NR: not covered by the flood listCH4 0NS: not covered by the flood listCH4 0NT: not covered by the flood listCH4 0NX: not covered by the flood listCH4 0NY: not covered by the flood listCH4 0PA: not covered by the flood listCH4 0PB: not covered by the flood listCH4 0PD: not covered by the flood listCH4 0PE: not covered by the flood listCH4 0PG: not covered by the flood listCH4 0PH: not covered by the flood listCH4 0PL: not covered by the flood listCH4 0PN: not covered by the flood listCH4 0PP: not covered by the flood listCH4 0PQ: not covered by the flood listCH4 0PR: not covered by the flood listCH4 0PS: not covered by the flood listCH4 0PT: not covered by the flood listCH4 0PX: not covered by the flood listCH4 0PY: not covered by the flood listCH4 0PZ: not covered by the flood listCH4 0QA: not covered by the flood listCH4 0QB: not covered by the flood listCH4 0QD: not covered by the flood listCH4 0QE: not covered by the flood listCH4 0QF: not covered by the flood listCH4 0QL: not covered by the flood listCH4 0QN: not covered by the flood listCH4 0QP: not covered by the flood listCH4 0QQ: not covered by the flood listCH4 0QR: not covered by the flood listCH4 0QT: not covered by the flood listCH4 0QU: not covered by the flood listCH4 0QW: not covered by the flood listCH4 0RA: not covered by the flood listCH4 0RB: not covered by the flood listCH4 0RD: not covered by the flood listCH4 0RE: not covered by the flood listCH4 0RF: not covered by the flood listCH4 0RG: not covered by the flood listCH4 0RL: not covered by the flood listCH4 0RP: not covered by the flood listCH4 0RQ: not covered by the flood listCH4 0RU: not covered by the flood listCH4 0RX: not covered by the flood listCH4 0RZ: not covered by the flood listCH4 0SA: not covered by the flood listCH4 0SD: not covered by the flood listCH4 0SE: not covered by the flood listCH4 0SF: not covered by the flood listCH4 0SG: not covered by the flood listCH4 0SH: not covered by the flood listCH4 0SJ: not covered by the flood listCH4 0SL: not covered by the flood listCH4 0SN: not covered by the flood listCH4 0SP: not covered by the flood listCH4 0SS: not covered by the flood listCH4 0ST: not covered by the flood listCH4 0SY: not covered by the flood listCH4 0TB: not covered by the flood listCH4 0TD: not covered by the flood listCH4 0TE: not covered by the flood listCH4 0TF: not covered by the flood listCH4 0TG: not covered by the flood listCH4 0TH: not covered by the flood listCH4 0TL: not covered by the flood listCH4 0TN: not covered by the flood listCH4 0TP: not covered by the flood listCH4 0TQ: not covered by the flood listCH4 0TU: not covered by the flood listCH4 0TW: not covered by the flood listCH4 0XA: not covered by the flood listCH4 0XB: not covered by the flood listCH4 0YR: not covered by the flood listCH4 0YT: not covered by the flood listCH4 0YU: not covered by the flood listCH4 0YX: not covered by the flood listCH4 8BF: not covered by the flood listCH4 8BT: not covered by the flood listCH4 8FA: not covered by the flood listCH4 8FD: not covered by the flood listCH4 8FE: not covered by the flood listCH4 8FG: not covered by the flood listCH4 8LA: not covered by the flood listCH4 8LH: not covered by the flood listCH4 8LQ: not covered by the flood listCH4 8LR: not covered by the flood listCH4 8LW: not covered by the flood listCH4 8NA: not covered by the flood listCH4 8NB: not covered by the flood listCH4 8NH: not covered by the flood listCH4 8PY: not covered by the flood listCH4 8QB: not covered by the flood listCH4 8QG: not covered by the flood listCH4 8QL: not covered by the flood listCH4 8QN: not covered by the flood listCH4 8QP: not covered by the flood listCH4 8RB: not covered by the flood listCH4 8RF: not covered by the flood listCH4 8RG: not covered by the flood listCH4 8RH: not covered by the flood listCH4 8RJ: not covered by the flood listCH4 8RL: not covered by the flood listCH4 8RQ: not covered by the flood listCH4 8RR: not covered by the flood listCH4 8RS: not covered by the flood listCH4 8RT: not covered by the flood listCH4 8SB: not covered by the flood listCH4 8SE: not covered by the flood listCH4 8SF: not covered by the flood listCH4 8SG: not covered by the flood listCH4 8SH: not covered by the flood listCH4 8SN: not covered by the flood listCH4 8SQ: not covered by the flood listCH4 8SS: not covered by the flood listCH4 8ST: not covered by the flood listCH4 8SU: not covered by the flood listCH4 8SW: not covered by the flood listCH4 8SZ: not covered by the flood listCH4 8TD: not covered by the flood listCH4 8TE: not covered by the flood listCH4 8TF: not covered by the flood listCH4 8TG: not covered by the flood listCH4 8TH: not covered by the flood listCH4 8TL: not covered by the flood listCH4 8TN: not covered by the flood listCH4 8TR: not covered by the flood listCH4 8TS: not covered by the flood listCH4 8TT: not covered by the flood listCH4 8TY: not covered by the flood listCH4 8TZ: not covered by the flood listCH4 8UA: not covered by the flood listCH4 8UB: not covered by the flood listCH4 8UD: not covered by the flood listCH4 8UE: not covered by the flood listCH4 8UF: not covered by the flood listCH4 8UG: not covered by the flood listCH4 8UH: not covered by the flood listCH4 8UJ: not covered by the flood listCH4 8UP: not covered by the flood listCH4 8UQ: not covered by the flood listCH4 9AA: not covered by the flood listCH4 9AB: not covered by the flood listCH4 9AH: not covered by the flood listCH4 9AJ: not covered by the flood listCH4 9AL: not covered by the flood listCH4 9AN: not covered by the flood listCH4 9AP: not covered by the flood listCH4 9AR: not covered by the flood listCH4 9AS: not covered by the flood listCH4 9AT: not covered by the flood listCH4 9AU: not covered by the flood listCH4 9AW: not covered by the flood listCH4 9AX: not covered by the flood listCH4 9AY: not covered by the flood listCH4 9AZ: not covered by the flood listCH4 9BA: not covered by the flood listCH4 9BB: not covered by the flood listCH4 9BE: not covered by the flood listCH4 9BG: not covered by the flood listCH4 9BH: not covered by the flood listCH4 9BJ: not covered by the flood listCH4 9BN: not covered by the flood listCH4 9BP: not covered by the flood listCH4 9BQ: not covered by the flood listCH4 9BR: not covered by the flood listCH4 9BS: not covered by the flood listCH4 9BT: not covered by the flood listCH4 9BU: not covered by the flood listCH4 9BZ: not covered by the flood listCH4 9DB: not covered by the flood listCH4 9DD: not covered by the flood listCH4 9DY: not covered by the flood listCH4 9DZ: not covered by the flood listCH4 9EA: not covered by the flood listCH4 9EH: not covered by the flood listCH4 9FW: not covered by the flood listCH4 9FX: not covered by the flood listCH4 9GD: not covered by the flood listCH4 9GF: not covered by the flood listCH4 9PA: not covered by the flood listCH4 9PB: not covered by the flood listCH4 9PF: not covered by the flood listCH4 7AB: not on the flood risk listCH4 7AD: not on the flood risk listCH4 7AE: not on the flood risk listCH4 7AG: not on the flood risk listCH4 7AH: not on the flood risk listCH4 7AP: not on the flood risk listCH4 7AQ: not on the flood risk listCH4 7AR: not on the flood risk listCH4 7AS: not on the flood risk listCH4 7AY: not on the flood risk listCH4 7BD: not on the flood risk listCH4 7BE: not on the flood risk listCH4 7BF: not on the flood risk listCH4 7BH: not on the flood risk listCH4 7BJ: not on the flood risk listCH4 7BL: not on the flood risk listCH4 7BN: not on the flood risk listCH4 7BP: not on the flood risk listCH4 7BQ: not on the flood risk listCH4 7BR: not on the flood risk listCH4 7BS: not on the flood risk listCH4 7BT: not on the flood risk listCH4 7BW: not on the flood risk listCH4 7BY: not on the flood risk listCH4 7DD: not on the flood risk listCH4 7DJ: not on the flood risk listCH4 7DL: not on the flood risk listCH4 7DP: not on the flood risk listCH4 7DQ: not on the flood risk listCH4 7DR: not on the flood risk listCH4 7DT: not on the flood risk listCH4 7DX: not on the flood risk listCH4 7DY: not on the flood risk listCH4 7DZ: not on the flood risk listCH4 7EA: not on the flood risk listCH4 7EB: not on the flood risk listCH4 7EE: not on the flood risk listCH4 7EH: not on the flood risk listCH4 7EJ: not on the flood risk listCH4 7EL: not on the flood risk listCH4 7EN: not on the flood risk listCH4 7EP: not on the flood risk listCH4 7EQ: not on the flood risk listCH4 7ER: not on the flood risk listCH4 7ES: not on the flood risk listCH4 7ET: not on the flood risk listCH4 7EU: not on the flood risk listCH4 7EX: not on the flood risk listCH4 7FA: not on the flood risk listCH4 7FB: not on the flood risk listCH4 7FD: not on the flood risk listCH4 7FG: not on the flood risk listCH4 7FH: not on the flood risk listCH4 7FJ: not on the flood risk listCH4 7FN: not on the flood risk listCH4 7FR: not on the flood risk listCH4 7FT: not on the flood risk listCH4 7FW: not on the flood risk listCH4 7FZ: not on the flood risk listCH4 7GA: not on the flood risk listCH4 7GB: not on the flood risk listCH4 7GD: not on the flood risk listCH4 7GF: not on the flood risk listCH4 7GG: not on the flood risk listCH4 7GJ: not on the flood risk listCH4 7GL: not on the flood risk listCH4 7GN: not on the flood risk listCH4 7GP: not on the flood risk listCH4 7GQ: not on the flood risk listCH4 7GR: not on the flood risk listCH4 7GT: not on the flood risk listCH4 7HB: not on the flood risk listCH4 7HG: not on the flood risk listCH4 7HJ: not on the flood risk listCH4 7HN: not on the flood risk listCH4 7HS: not on the flood risk listCH4 7HW: not on the flood risk listCH4 7JD: not on the flood risk listCH4 7JE: not on the flood risk listCH4 7JN: not on the flood risk listCH4 7JU: not on the flood risk listCH4 7LB: not on the flood risk listCH4 7LD: not on the flood risk listCH4 7LE: not on the flood risk listCH4 7LF: not on the flood risk listCH4 7LG: not on the flood risk listCH4 7LJ: not on the flood risk listCH4 7LN: not on the flood risk listCH4 7LP: not on the flood risk listCH4 7LQ: not on the flood risk listCH4 7LR: not on the flood risk listCH4 7LS: not on the flood risk listCH4 7LT: not on the flood risk listCH4 7LU: not on the flood risk listCH4 7LX: not on the flood risk listCH4 7LY: not on the flood risk listCH4 7LZ: not on the flood risk listCH4 7NA: not on the flood risk listCH4 7NB: not on the flood risk listCH4 7ND: not on the flood risk listCH4 7NE: not on the flood risk listCH4 7NJ: not on the flood risk listCH4 7NN: not on the flood risk listCH4 7NW: not on the flood risk listCH4 7PA: not on the flood risk listCH4 7PB: not on the flood risk listCH4 7PE: not on the flood risk listCH4 7PF: not on the flood risk listCH4 7PG: not on the flood risk listCH4 7PH: not on the flood risk listCH4 7PL: not on the flood risk listCH4 7PN: not on the flood risk listCH4 7PR: not on the flood risk listCH4 7PS: not on the flood risk listCH4 7QA: not on the flood risk listCH4 7QB: not on the flood risk listCH4 7QD: not on the flood risk listCH4 7QE: not on the flood risk listCH4 7QH: not on the flood risk listCH4 7QJ: not on the flood risk listCH4 7QL: not on the flood risk listCH4 7QP: not on the flood risk listCH4 7QQ: not on the flood risk listCH4 7QS: not on the flood risk listCH4 7QT: not on the flood risk listCH4 7QU: not on the flood risk listCH4 7QX: not on the flood risk listCH4 7QZ: not on the flood risk listCH4 7RD: not on the flood risk listCH4 7RH: not on the flood risk listCH4 7RJ: not on the flood risk listCH4 7RL: not on the flood risk listCH4 7RN: not on the flood risk listCH4 7RQ: not on the flood risk listCH4 8AA: not on the flood risk listCH4 8AB: not on the flood risk listCH4 8AD: not on the flood risk listCH4 8AE: not on the flood risk listCH4 8AF: not on the flood risk listCH4 8AG: not on the flood risk listCH4 8AH: not on the flood risk listCH4 8AJ: not on the flood risk listCH4 8AN: not on the flood risk listCH4 8AQ: not on the flood risk listCH4 8AT: not on the flood risk listCH4 8AX: not on the flood risk listCH4 8AY: not on the flood risk listCH4 8AZ: not on the flood risk listCH4 8BD: not on the flood risk listCH4 8BE: not on the flood risk listCH4 8BH: not on the flood risk listCH4 8BQ: not on the flood risk listCH4 8DB: not on the flood risk listCH4 8DD: not on the flood risk listCH4 8DE: not on the flood risk listCH4 8DF: not on the flood risk listCH4 8DG: not on the flood risk listCH4 8DJ: not on the flood risk listCH4 8DL: not on the flood risk listCH4 8DN: not on the flood risk listCH4 8DP: not on the flood risk listCH4 8DQ: not on the flood risk listCH4 8DR: not on the flood risk listCH4 8DS: not on the flood risk listCH4 8DU: not on the flood risk listCH4 8DY: not on the flood risk listCH4 8EA: not on the flood risk listCH4 8EB: not on the flood risk listCH4 8ED: not on the flood risk listCH4 8EF: not on the flood risk listCH4 8EG: not on the flood risk listCH4 8EH: not on the flood risk listCH4 8EL: not on the flood risk listCH4 8EN: not on the flood risk listCH4 8EP: not on the flood risk listCH4 8ES: not on the flood risk listCH4 8EX: not on the flood risk listCH4 8EY: not on the flood risk listCH4 8HE: not on the flood risk listCH4 8HH: not on the flood risk listCH4 8HJ: not on the flood risk listCH4 8HN: not on the flood risk listCH4 8HR: not on the flood risk listCH4 8HS: not on the flood risk listCH4 8HT: not on the flood risk listCH4 8HX: not on the flood risk listCH4 8HY: not on the flood risk listCH4 8HZ: not on the flood risk listCH4 8JA: not on the flood risk listCH4 8JB: not on the flood risk listCH4 8JE: not on the flood risk listCH4 8JG: not on the flood risk listCH4 8JN: not on the flood risk listCH4 8JQ: not on the flood risk listCH4 8JT: not on the flood risk listCH4 8JU: not on the flood risk listCH4 8JW: not on the flood risk listCH4 8JX: not on the flood risk listCH4 8JY: not on the flood risk listCH4 8LB: not on the flood risk listCH4 8LD: not on the flood risk listCH4 8LE: not on the flood risk listCH4 8LP: not on the flood risk listCH4 8LY: not on the flood risk listCH4 8ND: not on the flood risk listCH4 8NL: not on the flood risk listCH4 8NN: not on the flood risk listCH4 8NP: not on the flood risk listCH4 8NR: not on the flood risk listCH4 8NU: not on the flood risk listCH4 8NW: not on the flood risk listCH4 8PX: not on the flood risk listCH4 8QA: not on the flood risk listCH4 8QX: not on the flood risk listCH4 9AD: not on the flood risk listCH4 9AF: not on the flood risk listCH4 9AQ: not on the flood risk listCH4 9BW: not on the flood risk listCH4 9DE: not on the flood risk listCH4 9DF: not on the flood risk listCH4 9DG: not on the flood risk listCH4 9DH: not on the flood risk listCH4 9DJ: not on the flood risk listCH4 9DL: not on the flood risk listCH4 9DN: not on the flood risk listCH4 9DP: not on the flood risk listCH4 9DQ: not on the flood risk listCH4 9DR: not on the flood risk listCH4 9DS: not on the flood risk listCH4 9DT: not on the flood risk listCH4 9EB: not on the flood risk listCH4 9EE: not on the flood risk listCH4 9EG: not on the flood risk listCH4 9EL: not on the flood risk listCH4 9EN: not on the flood risk listCH4 9EP: not on the flood risk listCH4 9EQ: not on the flood risk listCH4 9ER: not on the flood risk listCH4 9ES: not on the flood risk listCH4 9ET: not on the flood risk listCH4 9EU: not on the flood risk listCH4 9EW: not on the flood risk listCH4 9EX: not on the flood risk listCH4 9EY: not on the flood risk listCH4 9EZ: not on the flood risk listCH4 9FB: not on the flood risk listCH4 9FD: not on the flood risk listCH4 9FH: not on the flood risk listCH4 9FJ: not on the flood risk listCH4 9FL: not on the flood risk listCH4 9GA: not on the flood risk listCH4 9GB: not on the flood risk listCH4 9GH: not on the flood risk listCH4 9GL: not on the flood risk listCH4 9GN: not on the flood risk listCH4 9GQ: not on the flood risk listCH4 9GR: not on the flood risk listCH4 9HB: not on the flood risk listCH4 9HD: not on the flood risk listCH4 9HG: not on the flood risk listCH4 9HH: not on the flood risk listCH4 9HP: not on the flood risk listCH4 9HT: not on the flood risk listCH4 9HU: not on the flood risk listCH4 9HW: not on the flood risk listCH4 9HZ: not on the flood risk listCH4 9JD: not on the flood risk listCH4 9JE: not on the flood risk listCH4 9JG: not on the flood risk listCH4 9JR: not on the flood risk listCH4 9JS: not on the flood risk listCH4 9JW: not on the flood risk listCH4 9JZ: not on the flood risk listCH4 9LB: not on the flood risk listCH4 9LG: not on the flood risk listCH4 9LH: not on the flood risk listCH4 9LJ: not on the flood risk listCH4 9LL: not on the flood risk listCH4 9LN: not on the flood risk listCH4 9LP: not on the flood risk listCH4 9LQ: not on the flood risk listCH4 9LW: not on the flood risk listCH4 9LZ: not on the flood risk listCH4 9NB: not on the flood risk listCH4 9NF: not on the flood risk listCH4 9NG: not on the flood risk listCH4 9NH: not on the flood risk listCH4 9NJ: not on the flood risk listCH4 9NL: not on the flood risk listCH4 9NN: not on the flood risk listCH4 9NP: not on the flood risk listCH4 9NR: not on the flood risk listCH4 9NT: not on the flood risk listCH4 9NU: not on the flood risk listCH4 9NW: not on the flood risk listCH4 9QE: not on the flood risk listCH4 9QH: not on the flood risk listCH4 9QJ: not on the flood risk listCH4 9QL: not on the flood risk listCH4 9QN: not on the flood risk listCH4 9QR: not on the flood risk listCH4 9QT: not on the flood risk listCH4 9QU: not on the flood risk listCH4 9QW: not on the flood risk listCH4 9QZ: not on the flood risk listCH4 9RE: not on the flood risk listCH4 7JS: very low flood risk onlyCH4 7JT: very low flood risk onlyCH4 8BJ: very low flood risk onlyCH4 8BL: very low flood risk onlyCH4 8BR: very low flood risk onlyCH4 8BY: very low flood risk onlyCH4 8PS: very low flood risk onlyCH4 9JN: very low flood risk onlyCH4 8LX: low flood risk at worstCH4 8PP: low flood risk at worstCH4 8PT: low flood risk at worstCH4 8QD: low flood risk at worstCH4 8RD: low flood risk at worstCH4 9AE: low flood risk at worstCH4 9LE: low flood risk at worstCH4 9LF: low flood risk at worstCH4 7JB: medium flood risk at worstCH4 7NG: medium flood risk at worstCH4 7NP: medium flood risk at worstCH4 8BA: medium flood risk at worstCH4 8LU: medium flood risk at worstCH4 8NE: medium flood risk at worstCH4 8PD: medium flood risk at worstCH4 8PE: medium flood risk at worstCH4 8PF: medium flood risk at worstCH4 8PG: medium flood risk at worstCH4 8PH: medium flood risk at worstCH4 8PJ: medium flood risk at worstCH4 8PL: medium flood risk at worstCH4 8PQ: medium flood risk at worstCH4 8PU: medium flood risk at worstCH4 8PZ: medium flood risk at worstCH4 9AG: medium flood risk at worstCH4 7AX: high flood riskCH4 7BB: high flood riskCH4 7EW: high flood riskCH4 7JJ: high flood riskCH4 8AR: high flood riskCH4 8LN: high flood riskCH4 8LS: high flood riskCH4 9JF: high flood riskCH4 9JH: high flood risk ChesterHawardenBroughtonPenyfforddAston 18 postcodes at high or medium risk, outlined: this goes to CH4 8LS, the one with most homes and businesses at high risk18 postcodes at high or medium risk Map of every postcode in CH4, by flood risk Of the 484 postcodes in CH4 in England that ONS places, 9 have a home or business at high risk, 19 are at medium risk at worst, 12 are at low risk at worst, 11 are at very low risk only and 433 are not on the Environment Agency's at-risk list. The other 438 are in Wales or Scotland, which the Environment Agency's list does not cover. One group of postcodes at high or medium risk is outlined: 18 postcodes at high or medium risk. Places named: Chester, Hawarden, Broughton, Penyffordd. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. ChesterHawardenBroughtonPenyffordd
  • A home or business at high risk: 9
  • At medium risk at worst: 19
  • At low risk at worst: 12
  • At very low risk only: 11
  • Not on the at-risk list: 433
  • In Wales or Scotland: not covered by the Environment Agency: 438
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 484 postcodes in CH4 in England that ONS places, 9 have a home or business at high risk, 19 are at medium risk at worst, 12 are at low risk at worst, 11 are at very low risk only and 433 are not on the Environment Agency's at-risk list. The other 438 are in Wales or Scotland, which the Environment Agency's list does not cover.

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 53.1655, longitude -2.9471. 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

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

CH4 8LS10 at high riskCH4 9JF8 at high riskCH4 7JJ6 at high riskCH4 7EW4 at high riskCH4 8AR4 at high riskCH4 7BB3 at high riskCH4 7AX2 at high riskCH4 8LN1 at high riskCH4 9JH1 at high risk

Where the postcodes at high or medium risk lie together

  • 18 postcodes at high or medium risk, outlined on the map. CH4 8LS, is the one with most homes and businesses at high risk.

What broadband can you get in CH4?

Ofcom reports on 907 of the 922 postcodes in CH4. At 684 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 gigabit684 of 907
Postcodes where every home can get superfast812 of 907
Postcodes where some cannot get decent broadband3 of 907

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 CH4 at risk of flooding?

51 of the 484 postcodes in CH4 that are in England 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 213 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 51 of 484 postcodes High: 39Medium: 174Low: 287Very low: 91

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 CH4?

Homes in CH4 sold for a typical £275,000 in the 12 months to August 2026, across 409 sales, up 7.8% on the 12 months before, HM Land Registry's figures show.

£275,000 typical price, the 12 months to August 2026
12 months to August 2025
£255,000
12 months to August 2026
£275,000

▲ up 7.8% on the 12 months before

Detached£373,750 152 sales
Semi-detached£234,250 148 sales
Terraced£230,000 77 sales
Flat or maisonette£138,250 32 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 CH4

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

CH4 0291 postcodesCH4 7208 postcodesCH4 8248 postcodesCH4 9175 postcodes
UK postcode format explained

Places in CH4

Towns and villages with postcodes in CH4, and how many each has here.

Chester postcodes,504Broughton postcodes,133Penyffordd postcodes,109

Who covers CH4

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

  • Chester South and Eddisbury479
  • Alyn and Deeside438
  • Chester North and Neston5

Police force areas

  • Cheshire484
  • North Wales438

Next to CH4

CH3 postcode district CH5 postcode district All CH districts Chester postcodes

"Next to" is by number: the districts before and after CH4 in the CH area.

Check a postcode

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