CO9 postcode district: Halstead and around, Essex

CO9 is a postcode district in Essex, with 928 postcodes in use in 5 sectors. It has postcodes in Halstead, Sible Hedingham and Great Yeldham. Its council is Braintree.

Postcodes in use
928
Sectors
5
Council
Braintree
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 CO9, by flood risk

Map of every postcode in CO9, by flood risk Of the 928 postcodes in CO9 that ONS places, 58 have a home or business at high risk, 12 are at medium risk at worst, 35 are at low risk at worst and 823 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 24 postcodes at high or medium risk; 7 postcodes at high or medium risk. Places named: Halstead, Sible Hedingham, Earls Colne, Great Yeldham. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 2.5 km. CO9 1AA: not on the flood risk listCO9 1AB: not on the flood risk listCO9 1AF: not on the flood risk listCO9 1AG: not on the flood risk listCO9 1AH: not on the flood risk listCO9 1AJ: not on the flood risk listCO9 1AL: not on the flood risk listCO9 1AN: not on the flood risk listCO9 1AP: not on the flood risk listCO9 1AT: not on the flood risk listCO9 1AZ: not on the flood risk listCO9 1BB: not on the flood risk listCO9 1BD: not on the flood risk listCO9 1BG: not on the flood risk listCO9 1BJ: not on the flood risk listCO9 1BL: not on the flood risk listCO9 1BN: not on the flood risk listCO9 1BP: not on the flood risk listCO9 1BQ: not on the flood risk listCO9 1BS: not on the flood risk listCO9 1BT: not on the flood risk listCO9 1BY: not on the flood risk listCO9 1DB: not on the flood risk listCO9 1DD: not on the flood risk listCO9 1DN: not on the flood risk listCO9 1DS: not on the flood risk listCO9 1DT: not on the flood risk listCO9 1DU: not on the flood risk listCO9 1DY: not on the flood risk listCO9 1EB: not on the flood risk listCO9 1EJ: not on the flood risk listCO9 1EL: not on the flood risk listCO9 1EN: not on the flood risk listCO9 1EU: not on the flood risk listCO9 1FA: not on the flood risk listCO9 1FG: not on the flood risk listCO9 1FJ: not on the flood risk listCO9 1FL: not on the flood risk listCO9 1FP: not on the flood risk listCO9 1FT: not on the flood risk listCO9 1FY: not on the flood risk listCO9 1FZ: not on the flood risk listCO9 1GB: not on the flood risk listCO9 1GF: not on the flood risk listCO9 1GG: not on the flood risk listCO9 1GQ: not on the flood risk listCO9 1GR: not on the flood risk listCO9 1GS: not on the flood risk listCO9 1GW: not on the flood risk listCO9 1HG: not on the flood risk listCO9 1JP: not on the flood risk listCO9 1JR: not on the flood risk listCO9 1JS: not on the flood risk listCO9 1JT: not on the flood risk listCO9 1JU: not on the flood risk listCO9 1JW: not on the flood risk listCO9 1JY: not on the flood risk listCO9 1LJ: not on the flood risk listCO9 1LN: not on the flood risk listCO9 1LP: not on the flood risk listCO9 1LQ: not on the flood risk listCO9 1LR: not on the flood risk listCO9 1LS: not on the flood risk listCO9 1LX: not on the flood risk listCO9 1LY: not on the flood risk listCO9 1LZ: not on the flood risk listCO9 1NA: not on the flood risk listCO9 1NB: not on the flood risk listCO9 1NF: not on the flood risk listCO9 1NG: not on the flood risk listCO9 1NH: not on the flood risk listCO9 1NJ: not on the flood risk listCO9 1NL: not on the flood risk listCO9 1NN: not on the flood risk listCO9 1NS: not on the flood risk listCO9 1NU: not on the flood risk listCO9 1NY: not on the flood risk listCO9 1PA: not on the flood risk listCO9 1PB: not on the flood risk listCO9 1PD: not on the flood risk listCO9 1PE: not on the flood risk listCO9 1PF: not on the flood risk listCO9 1PG: not on the flood risk listCO9 1PH: not on the flood risk listCO9 1PL: not on the flood risk listCO9 1PN: not on the flood risk listCO9 1PQ: not on the flood risk listCO9 1PS: not on the flood risk listCO9 1PZ: not on the flood risk listCO9 1QA: not on the flood risk listCO9 1QB: not on the flood risk listCO9 1QD: not on the flood risk listCO9 1QF: not on the flood risk listCO9 1QG: not on the flood risk listCO9 1QH: not on the flood risk listCO9 1QJ: not on the flood risk listCO9 1QN: not on the flood risk listCO9 1QP: not on the flood risk listCO9 1QR: not on the flood risk listCO9 1QS: not on the flood risk listCO9 1QU: not on the flood risk listCO9 1QY: not on the flood risk listCO9 1QZ: not on the flood risk listCO9 1RB: not on the flood risk listCO9 1RF: not on the flood risk listCO9 1RG: not on the flood risk listCO9 1RH: not on the flood risk listCO9 1RJ: not on the flood risk listCO9 1RL: not on the flood risk listCO9 1RN: not on the flood risk listCO9 1RP: not on the flood risk listCO9 1RR: not on the flood risk listCO9 1RS: not on the flood risk listCO9 1RT: not on the flood risk listCO9 1RU: not on the flood risk listCO9 1RX: not on the flood risk listCO9 1RZ: not on the flood risk listCO9 1SA: not on the flood risk listCO9 1SB: not on the flood risk listCO9 1SD: not on the flood risk listCO9 1SE: not on the flood risk listCO9 1SF: not on the flood risk listCO9 1SG: not on the flood risk listCO9 1SH: not on the flood risk listCO9 1SL: not on the flood risk listCO9 1SN: not on the flood risk listCO9 1SP: not on the flood risk listCO9 1SQ: not on the flood risk listCO9 1SR: not on the flood risk listCO9 1SS: not on the flood risk listCO9 1ST: not on the flood risk listCO9 1SU: not on the flood risk listCO9 1SW: not on the flood risk listCO9 1SX: not on the flood risk listCO9 1SY: not on the flood risk listCO9 1TB: not on the flood risk listCO9 1TD: not on the flood risk listCO9 1TF: not on the flood risk listCO9 1TG: not on the flood risk listCO9 1TH: not on the flood risk listCO9 1TJ: not on the flood risk listCO9 1TL: not on the flood risk listCO9 1TP: not on the flood risk listCO9 1TR: not on the flood risk listCO9 1TW: not on the flood risk listCO9 1UB: not on the flood risk listCO9 1UD: not on the flood risk listCO9 1UF: not on the flood risk listCO9 1UH: not on the flood risk listCO9 1UL: not on the flood risk listCO9 1UP: not on the flood risk listCO9 1XA: not on the flood risk listCO9 2AA: not on the flood risk listCO9 2AJ: not on the flood risk listCO9 2AR: not on the flood risk listCO9 2AU: not on the flood risk listCO9 2AW: not on the flood risk listCO9 2AY: not on the flood risk listCO9 2AZ: not on the flood risk listCO9 2BA: not on the flood risk listCO9 2BB: not on the flood risk listCO9 2BD: not on the flood risk listCO9 2BE: not on the flood risk listCO9 2BG: not on the flood risk listCO9 2BJ: not on the flood risk listCO9 2BP: not on the flood risk listCO9 2BS: not on the flood risk listCO9 2DA: not on the flood risk listCO9 2DJ: not on the flood risk listCO9 2DL: not on the flood risk listCO9 2DP: not on the flood risk listCO9 2DQ: not on the flood risk listCO9 2DW: not on the flood risk listCO9 2DY: not on the flood risk listCO9 2ED: not on the flood risk listCO9 2EG: not on the flood risk listCO9 2EL: not on the flood risk listCO9 2EN: not on the flood risk listCO9 2EP: not on the flood risk listCO9 2ER: not on the flood risk listCO9 2ES: not on the flood risk listCO9 2ET: not on the flood risk listCO9 2EU: not on the flood risk listCO9 2EX: not on the flood risk listCO9 2EZ: not on the flood risk listCO9 2FE: not on the flood risk listCO9 2FF: not on the flood risk listCO9 2FJ: not on the flood risk listCO9 2FL: not on the flood risk listCO9 2FN: not on the flood risk listCO9 2FP: not on the flood risk listCO9 2FQ: not on the flood risk listCO9 2GH: not on the flood risk listCO9 2GN: not on the flood risk listCO9 2GP: not on the flood risk listCO9 2GS: not on the flood risk listCO9 2GW: not on the flood risk listCO9 2GZ: not on the flood risk listCO9 2HB: not on the flood risk listCO9 2HF: not on the flood risk listCO9 2HG: not on the flood risk listCO9 2HH: not on the flood risk listCO9 2HJ: not on the flood risk listCO9 2HL: not on the flood risk listCO9 2HN: not on the flood risk listCO9 2HR: not on the flood risk listCO9 2HZ: not on the flood risk listCO9 2JJ: not on the flood risk listCO9 2JS: not on the flood risk listCO9 2JT: not on the flood risk listCO9 2LE: not on the flood risk listCO9 2LX: not on the flood risk listCO9 2LY: not on the flood risk listCO9 2LZ: not on the flood risk listCO9 2NB: not on the flood risk listCO9 2NE: not on the flood risk listCO9 2NG: not on the flood risk listCO9 2NN: not on the flood risk listCO9 2NP: not on the flood risk listCO9 2NR: not on the flood risk listCO9 2NS: not on the flood risk listCO9 2NT: not on the flood risk listCO9 2NU: not on the flood risk listCO9 2NX: not on the flood risk listCO9 2NY: not on the flood risk listCO9 2NZ: not on the flood risk listCO9 2PA: not on the flood risk listCO9 2PD: not on the flood risk listCO9 2PE: not on the flood risk listCO9 2PG: not on the flood risk listCO9 2PH: not on the flood risk listCO9 2PJ: not on the flood risk listCO9 2PL: not on the flood risk listCO9 2PN: not on the flood risk listCO9 2PP: not on the flood risk listCO9 2PR: not on the flood risk listCO9 2PS: not on the flood risk listCO9 2PT: not on the flood risk listCO9 2PU: not on the flood risk listCO9 2PW: not on the flood risk listCO9 2PX: not on the flood risk listCO9 2QA: not on the flood risk listCO9 2QB: not on the flood risk listCO9 2QD: not on the flood risk listCO9 2QE: not on the flood risk listCO9 2QG: not on the flood risk listCO9 2QH: not on the flood risk listCO9 2QJ: not on the flood risk listCO9 2QL: not on the flood risk listCO9 2QP: not on the flood risk listCO9 2QR: not on the flood risk listCO9 2QS: not on the flood risk listCO9 2QU: not on the flood risk listCO9 2QW: not on the flood risk listCO9 2QX: not on the flood risk listCO9 2QZ: not on the flood risk listCO9 2RA: not on the flood risk listCO9 2RB: not on the flood risk listCO9 2RD: not on the flood risk listCO9 2RG: not on the flood risk listCO9 2RH: not on the flood risk listCO9 2RJ: not on the flood risk listCO9 2RL: not on the flood risk listCO9 2RN: not on the flood risk listCO9 2RP: not on the flood risk listCO9 2RQ: not on the flood risk listCO9 2RR: not on the flood risk listCO9 2RS: not on the flood risk listCO9 2RT: not on the flood risk listCO9 2RU: not on the flood risk listCO9 2RY: not on the flood risk listCO9 2RZ: not on the flood risk listCO9 2SB: not on the flood risk listCO9 2SD: not on the flood risk listCO9 2SE: not on the flood risk listCO9 2SF: not on the flood risk listCO9 2SG: not on the flood risk listCO9 2SH: not on the flood risk listCO9 2SJ: not on the flood risk listCO9 2SL: not on the flood risk listCO9 2SN: not on the flood risk listCO9 2SQ: not on the flood risk listCO9 2ST: not on the flood risk listCO9 2SX: not on the flood risk listCO9 2SY: not on the flood risk listCO9 2TB: not on the flood risk listCO9 2TH: not on the flood risk listCO9 2TL: not on the flood risk listCO9 2TN: not on the flood risk listCO9 2TR: not on the flood risk listCO9 2TU: not on the flood risk listCO9 3AA: not on the flood risk listCO9 3AB: not on the flood risk listCO9 3AD: not on the flood risk listCO9 3AE: not on the flood risk listCO9 3AG: not on the flood risk listCO9 3AH: not on the flood risk listCO9 3AJ: not on the flood risk listCO9 3AP: not on the flood risk listCO9 3AR: not on the flood risk listCO9 3AS: not on the flood risk listCO9 3AT: not on the flood risk listCO9 3AU: not on the flood risk listCO9 3AX: not on the flood risk listCO9 3AZ: not on the flood risk listCO9 3BA: not on the flood risk listCO9 3BB: not on the flood risk listCO9 3BD: not on the flood risk listCO9 3BE: not on the flood risk listCO9 3BG: not on the flood risk listCO9 3BH: not on the flood risk listCO9 3BJ: not on the flood risk listCO9 3BN: not on the flood risk listCO9 3BP: not on the flood risk listCO9 3BQ: not on the flood risk listCO9 3BS: not on the flood risk listCO9 3BW: not on the flood risk listCO9 3BX: not on the flood risk listCO9 3DE: not on the flood risk listCO9 3DF: not on the flood risk listCO9 3DJ: not on the flood risk listCO9 3DQ: not on the flood risk listCO9 3DT: not on the flood risk listCO9 3DX: not on the flood risk listCO9 3EA: not on the flood risk listCO9 3EB: not on the flood risk listCO9 3EE: not on the flood risk listCO9 3EG: not on the flood risk listCO9 3EH: not on the flood risk listCO9 3EQ: not on the flood risk listCO9 3EU: not on the flood risk listCO9 3EX: not on the flood risk listCO9 3FE: not on the flood risk listCO9 3FH: not on the flood risk listCO9 3FJ: not on the flood risk listCO9 3FL: not on the flood risk listCO9 3FP: not on the flood risk listCO9 3HB: not on the flood risk listCO9 3HH: not on the flood risk listCO9 3HJ: not on the flood risk listCO9 3HL: not on the flood risk listCO9 3HT: not on the flood risk listCO9 3HZ: not on the flood risk listCO9 3JB: not on the flood risk listCO9 3JD: not on the flood risk listCO9 3JE: not on the flood risk listCO9 3JH: not on the flood risk listCO9 3JJ: not on the flood risk listCO9 3JL: not on the flood risk listCO9 3JP: not on the flood risk listCO9 3JR: not on the flood risk listCO9 3JS: not on the flood risk listCO9 3LA: not on the flood risk listCO9 3LD: not on the flood risk listCO9 3LE: not on the flood risk listCO9 3LG: not on the flood risk listCO9 3LJ: not on the flood risk listCO9 3LL: not on the flood risk listCO9 3LN: not on the flood risk listCO9 3LP: not on the flood risk listCO9 3LR: not on the flood risk listCO9 3LS: not on the flood risk listCO9 3LT: not on the flood risk listCO9 3LU: not on the flood risk listCO9 3LX: not on the flood risk listCO9 3LZ: not on the flood risk listCO9 3NA: not on the flood risk listCO9 3NF: not on the flood risk listCO9 3NJ: not on the flood risk listCO9 3NN: not on the flood risk listCO9 3NR: not on the flood risk listCO9 3NT: not on the flood risk listCO9 3NX: not on the flood risk listCO9 3NZ: not on the flood risk listCO9 3PA: not on the flood risk listCO9 3PD: not on the flood risk listCO9 3PJ: not on the flood risk listCO9 3PP: not on the flood risk listCO9 3PY: not on the flood risk listCO9 3PZ: not on the flood risk listCO9 3QG: not on the flood risk listCO9 3QJ: not on the flood risk listCO9 3QL: not on the flood risk listCO9 3QS: not on the flood risk listCO9 3QW: not on the flood risk listCO9 3QX: not on the flood risk listCO9 3RG: not on the flood risk listCO9 3RJ: not on the flood risk listCO9 3RL: not on the flood risk listCO9 3RN: not on the flood risk listCO9 3RP: not on the flood risk listCO9 3RR: not on the flood risk listCO9 3RS: not on the flood risk listCO9 3RT: not on the flood risk listCO9 3RX: not on the flood risk listCO9 4AA: not on the flood risk listCO9 4AE: not on the flood risk listCO9 4AG: not on the flood risk listCO9 4AP: not on the flood risk listCO9 4BD: not on the flood risk listCO9 4BE: not on the flood risk listCO9 4BG: not on the flood risk listCO9 4BH: not on the flood risk listCO9 4BJ: not on the flood risk listCO9 4BN: not on the flood risk listCO9 4BP: not on the flood risk listCO9 4BS: not on the flood risk listCO9 4BT: not on the flood risk listCO9 4BU: not on the flood risk listCO9 4BX: not on the flood risk listCO9 4BY: not on the flood risk listCO9 4BZ: not on the flood risk listCO9 4DA: not on the flood risk listCO9 4DB: not on the flood risk listCO9 4DD: not on the flood risk listCO9 4DG: not on the flood risk listCO9 4DJ: not on the flood risk listCO9 4DQ: not on the flood risk listCO9 4DR: not on the flood risk listCO9 4DS: not on the flood risk listCO9 4DT: not on the flood risk listCO9 4DW: not on the flood risk listCO9 4DX: not on the flood risk listCO9 4DZ: not on the flood risk listCO9 4ED: not on the flood risk listCO9 4EF: not on the flood risk listCO9 4EG: not on the flood risk listCO9 4EH: not on the flood risk listCO9 4EJ: not on the flood risk listCO9 4EL: not on the flood risk listCO9 4EN: not on the flood risk listCO9 4FA: not on the flood risk listCO9 4FB: not on the flood risk listCO9 4FE: not on the flood risk listCO9 4HE: not on the flood risk listCO9 4HG: not on the flood risk listCO9 4HH: not on the flood risk listCO9 4HN: not on the flood risk listCO9 4HT: not on the flood risk listCO9 4HZ: not on the flood risk listCO9 4JE: not on the flood risk listCO9 4JG: not on the flood risk listCO9 4JH: not on the flood risk listCO9 4JJ: not on the flood risk listCO9 4JP: not on the flood risk listCO9 4JR: not on the flood risk listCO9 4JS: not on the flood risk listCO9 4JT: not on the flood risk listCO9 4JX: not on the flood risk listCO9 4JY: not on the flood risk listCO9 4JZ: not on the flood risk listCO9 4LA: not on the flood risk listCO9 4LB: not on the flood risk listCO9 4LD: not on the flood risk listCO9 4LE: not on the flood risk listCO9 4LF: not on the flood risk listCO9 4LH: not on the flood risk listCO9 4LL: not on the flood risk listCO9 4LN: not on the flood risk listCO9 4LR: not on the flood risk listCO9 4LS: not on the flood risk listCO9 4LW: not on the flood risk listCO9 4LZ: not on the flood risk listCO9 4NB: not on the flood risk listCO9 4ND: not on the flood risk listCO9 4NG: not on the flood risk listCO9 4NH: not on the flood risk listCO9 4NJ: not on the flood risk listCO9 4NN: not on the flood risk listCO9 4NQ: not on the flood risk listCO9 4NR: not on the flood risk listCO9 4NT: not on the flood risk listCO9 4NX: not on the flood risk listCO9 4NZ: not on the flood risk listCO9 4PA: not on the flood risk listCO9 4PE: not on the flood risk listCO9 4PG: not on the flood risk listCO9 4PH: not on the flood risk listCO9 4PU: not on the flood risk listCO9 4QG: not on the flood risk listCO9 4QQ: not on the flood risk listCO9 4QS: not on the flood risk listCO9 4QT: not on the flood risk listCO9 4QX: not on the flood risk listCO9 4RB: not on the flood risk listCO9 4RG: not on the flood risk listCO9 4RH: not on the flood risk listCO9 4RP: not on the flood risk listCO9 4RQ: not on the flood risk listCO9 4RR: not on the flood risk listCO9 4RS: not on the flood risk listCO9 4RT: not on the flood risk listCO9 4RZ: not on the flood risk listCO9 4SG: not on the flood risk listCO9 4SH: not on the flood risk listCO9 4SJ: not on the flood risk listCO9 4SP: not on the flood risk listCO9 4SR: not on the flood risk listCO9 4ST: not on the flood risk listCO9 4SW: not on the flood risk listCO9 4SY: not on the flood risk listCO9 1HA: low flood risk at worstCO9 1LL: low flood risk at worstCO9 1TU: low flood risk at worstCO9 1UG: low flood risk at worstCO9 2DR: low flood risk at worstCO9 2QT: low flood risk at worstCO9 3AN: low flood risk at worstCO9 3BL: low flood risk at worstCO9 3DB: low flood risk at worstCO9 3DY: low flood risk at worstCO9 3DZ: low flood risk at worstCO9 3HD: low flood risk at worstCO9 3FN: low flood risk at worstCO9 3HS: low flood risk at worstCO9 3LH: low flood risk at worstCO9 3NU: low flood risk at worstCO9 3QD: low flood risk at worstCO9 4EA: low flood risk at worstCO9 4EB: low flood risk at worstCO9 4EU: low flood risk at worstCO9 4HA: low flood risk at worstCO9 4JN: low flood risk at worstCO9 4JQ: low flood risk at worstCO9 4LQ: low flood risk at worstCO9 4PD: low flood risk at worstCO9 4PJ: low flood risk at worstCO9 4PX: low flood risk at worstCO9 1HJ: medium flood risk at worstCO9 1PR: medium flood risk at worstCO9 3DS: medium flood risk at worstCO9 3QA: medium flood risk at worstCO9 4BB: medium flood risk at worstCO9 4HS: medium flood risk at worstCO9 1JQ: high flood riskCO9 1ET: high flood riskCO9 1EX: high flood riskCO9 1EZ: high flood riskCO9 1FD: high flood riskCO9 1JA: high flood riskCO9 1HB: high flood riskCO9 1HR: high flood riskCO9 1HT: high flood riskCO9 1JZ: high flood riskCO9 1XR: high flood riskCO9 2PQ: high flood riskCO9 2JR: high flood riskCO9 2LS: high flood riskCO9 2JG: high flood riskCO9 2LP: high flood riskCO9 2NH: high flood riskCO9 2NW: high flood riskCO9 2PB: high flood riskCO9 2QN: high flood riskCO9 2RE: high flood riskCO9 3AL: high flood riskCO9 3ED: high flood riskCO9 3DP: high flood riskCO9 3DR: high flood riskCO9 3HA: high flood riskCO9 3HX: high flood riskCO9 3HY: high flood riskCO9 3SB: high flood riskCO9 3RB: high flood riskCO9 3NS: high flood riskCO9 3QH: high flood riskCO9 3RE: high flood riskCO9 3RH: high flood riskCO9 4AB: high flood riskCO9 4AH: high flood riskCO9 4AJ: high flood riskCO9 4ER: high flood riskCO9 4PR: high flood riskCO9 4HB: high flood riskCO9 4HJ: high flood riskCO9 4HP: high flood riskCO9 4HU: high flood riskCO9 4JA: high flood riskCO9 4LG: high flood riskCO9 4LX: high flood riskCO9 4NE: high flood riskCO9 4NP: high flood riskCO9 4PT: high flood riskCO9 4PY: high flood riskCO9 4QL: high flood riskCO9 4RA: high flood risk HalsteadSible HedinghamEarls ColneGreat Yeldham 24 postcodes at high or medium risk, outlined: this goes to CO9 1HT, the one with most homes and businesses at high risk24 postcodes at high or medium risk7 postcodes at high or medium risk, outlined: this goes to CO9 4ER, the one with most homes and businesses at high risk7 postcodes at high or medium risk Map of every postcode in CO9, by flood risk Of the 928 postcodes in CO9 that ONS places, 58 have a home or business at high risk, 12 are at medium risk at worst, 35 are at low risk at worst and 823 are not on the Environment Agency's at-risk list. 2 groups of postcodes at high or medium risk are outlined: 24 postcodes at high or medium risk; 7 postcodes at high or medium risk. Places named: Halstead, Sible Hedingham, Earls Colne, Great Yeldham. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 5 km. HalsteadSible HedinghamEarls ColneGreat Yeldham
  • A home or business at high risk: 58
  • At medium risk at worst: 12
  • At low risk at worst: 35
  • At very low risk only: 0
  • Not on the at-risk list: 823
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 928 postcodes in CO9 that ONS places, 58 have a home or business at high risk, 12 are at medium risk at worst, 35 are at low risk at worst and 823 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 180 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 51.9690, longitude 0.6096. 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

58 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.

CO9 1HT28 at high riskCO9 2LT18 at high riskCO9 1EX14 at high riskCO9 4NE9 at high riskCO9 1HB7 at high riskCO9 3HX6 at high riskCO9 2JG5 at high riskCO9 3HA5 at high riskCO9 3AL4 at high riskCO9 1ET3 at high riskCO9 2JN3 at high riskCO9 2LS3 at high risk

Where the postcodes at high or medium risk lie together

  • 24 postcodes at high or medium risk, outlined on the map. CO9 1HT, is the one with most homes and businesses at high risk.
  • 7 postcodes at high or medium risk, outlined on the map. CO9 4ER, is the one with most homes and businesses at high risk.

What broadband can you get in CO9?

Ofcom reports on 903 of the 928 postcodes in CO9. At 625 of them every home and business can get gigabit broadband, and at 19 some cannot get decent broadband (10 Mbit/s).

Postcodes where every home can get gigabit625 of 903
Postcodes where every home can get superfast817 of 903
Postcodes where some cannot get decent broadband19 of 903

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 CO9 at risk of flooding?

105 of the 928 postcodes in CO9 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 492 homes and businesses in an area at high or medium risk.

Homes and businesses in an area at risk, at 105 of 928 postcodes High: 167Medium: 325Low: 234Very low: 3

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 CO9?

Homes in CO9 sold for a typical £323,500 in the 12 months to August 2026, across 312 sales, down 6.2% on the 12 months before, HM Land Registry's figures show.

£323,500 typical price, the 12 months to August 2026
£345,000 12 months to August 2025
▼ down 6.2% on the 12 months before
  • Detached £460,000 102 sales
  • Semi-detached £315,000 100 sales
  • Terraced £269,000 78 sales
  • Flat or maisonette £145,000 32 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 CO9

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

CO9 1293 postcodesCO9 2249 postcodesCO9 3194 postcodesCO9 4176 postcodesCO9 916 postcodes
UK postcode format explained

Places in CO9

Towns and villages with postcodes in CO9, and how many each has here.

Halstead postcodes,386Sible Hedingham postcodes,100Great Yeldham postcodes,54

Who covers CO9

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

  • Braintree900
  • Witham28

Police force areas

  • Essex928

Next to CO9

CO8 postcode district CO10 postcode district All CO districts Halstead postcodes

"Next to" is by number: the districts before and after CO9 in the CO area.

Check a postcode

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