S40 3 postcode sector in the S40 district

S40 3 is a sector of the S40 district: every postcode that starts S40 3. It has 231 postcodes in use, 3 of them large-user postcodes. A large-user postcode is one Royal Mail gives to a single address that gets a lot of mail.

Not sure what a sector is? UK postcode format explained.

Every postcode in the S40 3 sector, by flood risk

Map of every postcode in the S40 3 sector, by flood risk Of the 231 postcodes in the S40 3 sector that ONS places, 27 have a home or business at high risk, 1 are at medium risk at worst, 5 are at low risk at worst and 198 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 20 postcodes at high or medium risk. Places named: Walton, Brampton West & Loundsley Green. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. S40 3AN: not on the flood risk listS40 3AP: not on the flood risk listS40 3AR: not on the flood risk listS40 3AS: not on the flood risk listS40 3AT: not on the flood risk listS40 3AU: not on the flood risk listS40 3AW: not on the flood risk listS40 3AY: not on the flood risk listS40 3AZ: not on the flood risk listS40 3BA: not on the flood risk listS40 3BB: not on the flood risk listS40 3BF: not on the flood risk listS40 3BJ: not on the flood risk listS40 3BP: not on the flood risk listS40 3BS: not on the flood risk listS40 3BT: not on the flood risk listS40 3BU: not on the flood risk listS40 3BW: not on the flood risk listS40 3BX: not on the flood risk listS40 3BY: not on the flood risk listS40 3BZ: not on the flood risk listS40 3DA: not on the flood risk listS40 3DB: not on the flood risk listS40 3DD: not on the flood risk listS40 3DE: not on the flood risk listS40 3DF: not on the flood risk listS40 3DG: not on the flood risk listS40 3DH: not on the flood risk listS40 3DJ: not on the flood risk listS40 3DQ: not on the flood risk listS40 3DR: not on the flood risk listS40 3DS: not on the flood risk listS40 3DT: not on the flood risk listS40 3DU: not on the flood risk listS40 3DW: not on the flood risk listS40 3DX: not on the flood risk listS40 3DY: not on the flood risk listS40 3DZ: not on the flood risk listS40 3EA: not on the flood risk listS40 3EB: not on the flood risk listS40 3ED: not on the flood risk listS40 3EE: not on the flood risk listS40 3EF: not on the flood risk listS40 3EG: not on the flood risk listS40 3EH: not on the flood risk listS40 3EJ: not on the flood risk listS40 3EL: not on the flood risk listS40 3EN: not on the flood risk listS40 3EP: not on the flood risk listS40 3EQ: not on the flood risk listS40 3ER: not on the flood risk listS40 3ES: not on the flood risk listS40 3ET: not on the flood risk listS40 3EU: not on the flood risk listS40 3EW: not on the flood risk listS40 3EX: not on the flood risk listS40 3EY: not on the flood risk listS40 3EZ: not on the flood risk listS40 3FA: not on the flood risk listS40 3FB: not on the flood risk listS40 3FE: not on the flood risk listS40 3FF: not on the flood risk listS40 3FG: not on the flood risk listS40 3FH: not on the flood risk listS40 3FL: not on the flood risk listS40 3GW: not on the flood risk listS40 3GY: not on the flood risk listS40 3HA: not on the flood risk listS40 3HB: not on the flood risk listS40 3HD: not on the flood risk listS40 3HE: not on the flood risk listS40 3HF: not on the flood risk listS40 3HG: not on the flood risk listS40 3HH: not on the flood risk listS40 3HJ: not on the flood risk listS40 3HL: not on the flood risk listS40 3HN: not on the flood risk listS40 3HQ: not on the flood risk listS40 3HR: not on the flood risk listS40 3HS: not on the flood risk listS40 3HT: not on the flood risk listS40 3HU: not on the flood risk listS40 3HW: not on the flood risk listS40 3HX: not on the flood risk listS40 3HY: not on the flood risk listS40 3HZ: not on the flood risk listS40 3JA: not on the flood risk listS40 3JB: not on the flood risk listS40 3JD: not on the flood risk listS40 3JE: not on the flood risk listS40 3JF: not on the flood risk listS40 3JG: not on the flood risk listS40 3JH: not on the flood risk listS40 3JJ: not on the flood risk listS40 3JL: not on the flood risk listS40 3JN: not on the flood risk listS40 3JP: not on the flood risk listS40 3JQ: not on the flood risk listS40 3JR: not on the flood risk listS40 3JS: not on the flood risk listS40 3JT: not on the flood risk listS40 3JU: not on the flood risk listS40 3JW: not on the flood risk listS40 3JX: not on the flood risk listS40 3JY: not on the flood risk listS40 3JZ: not on the flood risk listS40 3LA: not on the flood risk listS40 3LB: not on the flood risk listS40 3LD: not on the flood risk listS40 3LE: not on the flood risk listS40 3LF: not on the flood risk listS40 3LG: not on the flood risk listS40 3LJ: not on the flood risk listS40 3LL: not on the flood risk listS40 3LN: not on the flood risk listS40 3LP: not on the flood risk listS40 3LQ: not on the flood risk listS40 3LR: not on the flood risk listS40 3LS: not on the flood risk listS40 3LT: not on the flood risk listS40 3LU: not on the flood risk listS40 3LW: not on the flood risk listS40 3LX: not on the flood risk listS40 3LY: not on the flood risk listS40 3LZ: not on the flood risk listS40 3NA: not on the flood risk listS40 3NB: not on the flood risk listS40 3ND: not on the flood risk listS40 3NE: not on the flood risk listS40 3NF: not on the flood risk listS40 3NG: not on the flood risk listS40 3NH: not on the flood risk listS40 3NJ: not on the flood risk listS40 3NL: not on the flood risk listS40 3NN: not on the flood risk listS40 3NP: not on the flood risk listS40 3NQ: not on the flood risk listS40 3NR: not on the flood risk listS40 3NS: not on the flood risk listS40 3NT: not on the flood risk listS40 3NU: not on the flood risk listS40 3NW: not on the flood risk listS40 3NX: not on the flood risk listS40 3NY: not on the flood risk listS40 3NZ: not on the flood risk listS40 3PA: not on the flood risk listS40 3PB: not on the flood risk listS40 3PD: not on the flood risk listS40 3PE: not on the flood risk listS40 3PH: not on the flood risk listS40 3PL: not on the flood risk listS40 3PN: not on the flood risk listS40 3PP: not on the flood risk listS40 3PR: not on the flood risk listS40 3PS: not on the flood risk listS40 3PT: not on the flood risk listS40 3PU: not on the flood risk listS40 3PX: not on the flood risk listS40 3PY: not on the flood risk listS40 3PZ: not on the flood risk listS40 3QE: not on the flood risk listS40 3QF: not on the flood risk listS40 3QH: not on the flood risk listS40 3QJ: not on the flood risk listS40 3QL: not on the flood risk listS40 3QN: not on the flood risk listS40 3QP: not on the flood risk listS40 3QR: not on the flood risk listS40 3QS: not on the flood risk listS40 3QU: not on the flood risk listS40 3QW: not on the flood risk listS40 3QX: not on the flood risk listS40 3RA: not on the flood risk listS40 3RB: not on the flood risk listS40 3RD: not on the flood risk listS40 3RE: not on the flood risk listS40 3RF: not on the flood risk listS40 3RH: not on the flood risk listS40 3RJ: not on the flood risk listS40 3RL: not on the flood risk listS40 3RN: not on the flood risk listS40 3RP: not on the flood risk listS40 3RQ: not on the flood risk listS40 3RR: not on the flood risk listS40 3RS: not on the flood risk listS40 3RT: not on the flood risk listS40 3RU: not on the flood risk listS40 3SA: not on the flood risk listS40 3SB: not on the flood risk listS40 3SD: not on the flood risk listS40 3SE: not on the flood risk listS40 3SF: not on the flood risk listS40 3SG: not on the flood risk listS40 3SP: not on the flood risk listS40 3SQ: not on the flood risk listS40 3SR: not on the flood risk listS40 3SS: not on the flood risk listS40 3SW: not on the flood risk listS40 3BG: low flood risk at worstS40 3DN: low flood risk at worstS40 3DP: low flood risk at worstS40 3PJ: low flood risk at worstS40 3SH: low flood risk at worstS40 3PQ: medium flood risk at worstS40 3AD: high flood riskS40 3AE: high flood riskS40 3AF: high flood riskS40 3AG: high flood riskS40 3AH: high flood riskS40 3AJ: high flood riskS40 3AL: high flood riskS40 3AQ: high flood riskS40 3BD: high flood riskS40 3BL: high flood riskS40 3BQ: high flood riskS40 3DL: high flood riskS40 3FJ: high flood riskS40 3LH: high flood riskS40 3PF: high flood riskS40 3PG: high flood riskS40 3QA: high flood riskS40 3QB: high flood riskS40 3QD: high flood riskS40 3QG: high flood riskS40 3QY: high flood riskS40 3QZ: high flood riskS40 3RG: high flood riskS40 3SJ: high flood riskS40 3SL: high flood riskS40 3SN: high flood riskS40 3SU: high flood risk WaltonBrampton West & Loundsley Green 20 postcodes at high or medium risk, outlined: this goes to S40 3BL, the one with most homes and businesses at high risk20 postcodes at high or medium risk Map of every postcode in the S40 3 sector, by flood risk Of the 231 postcodes in the S40 3 sector that ONS places, 27 have a home or business at high risk, 1 are at medium risk at worst, 5 are at low risk at worst and 198 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 20 postcodes at high or medium risk. Places named: Walton, Brampton West & Loundsley Green. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. WaltonBrampton West & Loundsley Green
  • A home or business at high risk: 27
  • At medium risk at worst: 1
  • At low risk at worst: 5
  • At very low risk only: 0
  • Not on the at-risk list: 198
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 231 postcodes in the S40 3 sector that ONS places, 27 have a home or business at high risk, 1 are at medium risk at worst, 5 are at low risk at worst and 198 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 160 metres of each other. It is not a boundary, and no boundary is drawn. Names in italics are council wards: we hold no town or village names here.

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

27 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.

S40 3BL16 at high riskS40 3RG15 at high riskS40 3AQ15 at high riskS40 3QZ15 at high riskS40 3AF12 at high riskS40 3AL12 at high riskS40 3QY11 at high riskS40 3AD10 at high riskS40 3SJ10 at high riskS40 3AG9 at high riskS40 3AJ9 at high riskS40 3QA7 at high risk

Where the postcodes at high or medium risk lie together

  • 20 postcodes at high or medium risk, outlined on the map. S40 3BL, is the one with most homes and businesses at high risk.

What do homes sell for in S40 3?

Homes in S40 3 sold for a typical £305,000 in the 12 months to August 2026, across 135 sales, up 3.7% on the 12 months before, HM Land Registry's figures show.

£305,000 typical price, the 12 months to August 2026
£294,000 12 months to August 2025
▲ up 3.7% on the 12 months before
  • Detached £362,500 69 sales
  • Semi-detached £252,500 54 sales
  • Terraced £190,000 10 sales
  • Flat or maisonette 2 sales, too few to price

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

Standard sales of homes at market value at the postcodes that start S40 3. A typical price is the median, the middle sale, given from 5 sales or more.

How we work this out: house prices by postcode

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 S40 3

Pick a postcode to see its council and MP, broadband, flood risk, what homes sell for, council tax, the nearest schools and stations, and crime around it.

S40 3ADS40 3AES40 3AFS40 3AGS40 3AHS40 3AJS40 3ALS40 3ANS40 3APS40 3AQS40 3ARS40 3ASS40 3ATS40 3AUS40 3AWS40 3AYS40 3AZS40 3BAS40 3BBS40 3BDS40 3BFS40 3BGS40 3BJS40 3BLS40 3BPS40 3BQS40 3BSS40 3BTS40 3BUS40 3BWS40 3BXS40 3BYS40 3BZS40 3DAS40 3DBS40 3DDS40 3DES40 3DFS40 3DGS40 3DHS40 3DJS40 3DLS40 3DNS40 3DPS40 3DQS40 3DRS40 3DSS40 3DTS40 3DUS40 3DWS40 3DXS40 3DYS40 3DZS40 3EAS40 3EBS40 3EDS40 3EES40 3EFS40 3EGS40 3EHS40 3EJS40 3ELS40 3ENS40 3EPS40 3EQS40 3ERS40 3ESS40 3ETS40 3EUS40 3EWS40 3EXS40 3EYS40 3EZS40 3FAS40 3FBS40 3FES40 3FFS40 3FGS40 3FHS40 3FJS40 3FLS40 3GWS40 3GYS40 3HAS40 3HBS40 3HDS40 3HES40 3HFS40 3HGS40 3HHS40 3HJS40 3HLS40 3HNS40 3HQS40 3HRS40 3HSS40 3HTS40 3HUS40 3HWS40 3HXS40 3HYS40 3HZS40 3JAS40 3JBS40 3JDS40 3JES40 3JFS40 3JGS40 3JHS40 3JJS40 3JLS40 3JNS40 3JPS40 3JQS40 3JRS40 3JSS40 3JTS40 3JUS40 3JWS40 3JXS40 3JYS40 3JZS40 3LAS40 3LBS40 3LDS40 3LES40 3LFS40 3LGS40 3LHS40 3LJS40 3LLS40 3LNS40 3LPS40 3LQS40 3LRS40 3LSS40 3LTS40 3LUS40 3LWS40 3LXS40 3LYS40 3LZS40 3NAS40 3NBS40 3NDS40 3NES40 3NFS40 3NGS40 3NHS40 3NJS40 3NLS40 3NNS40 3NPS40 3NQS40 3NRS40 3NSS40 3NTS40 3NUS40 3NWS40 3NXS40 3NYS40 3NZS40 3PAS40 3PBS40 3PDS40 3PES40 3PFS40 3PGS40 3PHS40 3PJS40 3PLS40 3PNS40 3PPS40 3PQS40 3PRS40 3PSS40 3PTS40 3PUS40 3PXS40 3PYS40 3PZS40 3QAS40 3QBS40 3QDS40 3QES40 3QFS40 3QGS40 3QHS40 3QJS40 3QLS40 3QNS40 3QPS40 3QRS40 3QSS40 3QUS40 3QWS40 3QXS40 3QYS40 3QZS40 3RAS40 3RBS40 3RDS40 3RES40 3RFS40 3RGS40 3RHS40 3RJS40 3RLS40 3RNS40 3RPS40 3RQS40 3RRS40 3RSS40 3RTS40 3RUS40 3SAS40 3SBS40 3SDS40 3SES40 3SFS40 3SGS40 3SHS40 3SJS40 3SLS40 3SNS40 3SPS40 3SQS40 3SRS40 3SSS40 3SUS40 3SW

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed. See all our data sources

What council am I in? The council, borough or local authority for a postcode, and the county council where there is one. What ward am I in? The ward for a postcode, with its council, constituency and parish.

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