SL3 7 postcode sector in the SL3 district

SL3 7 is a sector of the SL3 district: every postcode that starts SL3 7. It has 297 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 SL3 7 sector, by flood risk

Map of every postcode in the SL3 7 sector, by flood risk Of the 297 postcodes in the SL3 7 sector that ONS places, 11 have a home or business at high risk, 5 are at low risk at worst, 14 are at very low risk only and 267 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 9 postcodes at high or medium risk. Places named: Upton, Langley Marish. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. M4 SL3 7AA: not on the flood risk listSL3 7AB: not on the flood risk listSL3 7AD: not on the flood risk listSL3 7AE: not on the flood risk listSL3 7AF: not on the flood risk listSL3 7AG: not on the flood risk listSL3 7AH: not on the flood risk listSL3 7AJ: not on the flood risk listSL3 7AL: not on the flood risk listSL3 7AN: not on the flood risk listSL3 7AP: not on the flood risk listSL3 7AQ: not on the flood risk listSL3 7AR: not on the flood risk listSL3 7AS: not on the flood risk listSL3 7AT: not on the flood risk listSL3 7AU: not on the flood risk listSL3 7AW: not on the flood risk listSL3 7AX: not on the flood risk listSL3 7AY: not on the flood risk listSL3 7AZ: not on the flood risk listSL3 7BA: not on the flood risk listSL3 7BB: not on the flood risk listSL3 7BD: not on the flood risk listSL3 7BE: not on the flood risk listSL3 7BH: not on the flood risk listSL3 7BJ: not on the flood risk listSL3 7BL: not on the flood risk listSL3 7BN: not on the flood risk listSL3 7BR: not on the flood risk listSL3 7BS: not on the flood risk listSL3 7BT: not on the flood risk listSL3 7BU: not on the flood risk listSL3 7BW: not on the flood risk listSL3 7BX: not on the flood risk listSL3 7BY: not on the flood risk listSL3 7BZ: not on the flood risk listSL3 7DA: not on the flood risk listSL3 7DB: not on the flood risk listSL3 7DD: not on the flood risk listSL3 7DE: not on the flood risk listSL3 7DF: not on the flood risk listSL3 7DG: not on the flood risk listSL3 7DH: not on the flood risk listSL3 7DN: not on the flood risk listSL3 7DP: not on the flood risk listSL3 7DQ: not on the flood risk listSL3 7DR: not on the flood risk listSL3 7DS: not on the flood risk listSL3 7DW: not on the flood risk listSL3 7DX: not on the flood risk listSL3 7DY: not on the flood risk listSL3 7DZ: not on the flood risk listSL3 7EA: not on the flood risk listSL3 7EB: not on the flood risk listSL3 7ED: not on the flood risk listSL3 7EE: not on the flood risk listSL3 7EF: not on the flood risk listSL3 7EG: not on the flood risk listSL3 7EJ: not on the flood risk listSL3 7EL: not on the flood risk listSL3 7EN: not on the flood risk listSL3 7EQ: not on the flood risk listSL3 7ER: not on the flood risk listSL3 7ES: not on the flood risk listSL3 7ET: not on the flood risk listSL3 7EU: not on the flood risk listSL3 7EW: not on the flood risk listSL3 7EX: not on the flood risk listSL3 7EY: not on the flood risk listSL3 7EZ: not on the flood risk listSL3 7FD: not on the flood risk listSL3 7FE: not on the flood risk listSL3 7FF: not on the flood risk listSL3 7FH: not on the flood risk listSL3 7FJ: not on the flood risk listSL3 7FL: not on the flood risk listSL3 7FN: not on the flood risk listSL3 7FP: not on the flood risk listSL3 7FR: not on the flood risk listSL3 7FS: not on the flood risk listSL3 7FU: not on the flood risk listSL3 7FW: not on the flood risk listSL3 7FY: not on the flood risk listSL3 7FZ: not on the flood risk listSL3 7GA: not on the flood risk listSL3 7GB: not on the flood risk listSL3 7GD: not on the flood risk listSL3 7GH: not on the flood risk listSL3 7GJ: not on the flood risk listSL3 7GP: not on the flood risk listSL3 7GR: not on the flood risk listSL3 7GS: not on the flood risk listSL3 7GT: not on the flood risk listSL3 7GX: not on the flood risk listSL3 7GY: not on the flood risk listSL3 7GZ: not on the flood risk listSL3 7HA: not on the flood risk listSL3 7HB: not on the flood risk listSL3 7HD: not on the flood risk listSL3 7HF: not on the flood risk listSL3 7HG: not on the flood risk listSL3 7HH: not on the flood risk listSL3 7HL: not on the flood risk listSL3 7HP: not on the flood risk listSL3 7HR: not on the flood risk listSL3 7HS: not on the flood risk listSL3 7HT: not on the flood risk listSL3 7HU: not on the flood risk listSL3 7HX: not on the flood risk listSL3 7HY: not on the flood risk listSL3 7JA: not on the flood risk listSL3 7JD: not on the flood risk listSL3 7JG: not on the flood risk listSL3 7JH: not on the flood risk listSL3 7JJ: not on the flood risk listSL3 7JN: not on the flood risk listSL3 7JP: not on the flood risk listSL3 7JQ: not on the flood risk listSL3 7JR: not on the flood risk listSL3 7JS: not on the flood risk listSL3 7JT: not on the flood risk listSL3 7JU: not on the flood risk listSL3 7JW: not on the flood risk listSL3 7JX: not on the flood risk listSL3 7JY: not on the flood risk listSL3 7JZ: not on the flood risk listSL3 7LA: not on the flood risk listSL3 7LB: not on the flood risk listSL3 7LD: not on the flood risk listSL3 7LE: not on the flood risk listSL3 7LF: not on the flood risk listSL3 7LG: not on the flood risk listSL3 7LH: not on the flood risk listSL3 7LJ: not on the flood risk listSL3 7LN: not on the flood risk listSL3 7LP: not on the flood risk listSL3 7LQ: not on the flood risk listSL3 7LR: not on the flood risk listSL3 7LS: not on the flood risk listSL3 7LW: not on the flood risk listSL3 7LX: not on the flood risk listSL3 7LY: not on the flood risk listSL3 7LZ: not on the flood risk listSL3 7NE: not on the flood risk listSL3 7NF: not on the flood risk listSL3 7NG: not on the flood risk listSL3 7NH: not on the flood risk listSL3 7NJ: not on the flood risk listSL3 7NL: not on the flood risk listSL3 7NN: not on the flood risk listSL3 7NP: not on the flood risk listSL3 7NU: not on the flood risk listSL3 7NW: not on the flood risk listSL3 7NX: not on the flood risk listSL3 7NY: not on the flood risk listSL3 7NZ: not on the flood risk listSL3 7PA: not on the flood risk listSL3 7PB: not on the flood risk listSL3 7PD: not on the flood risk listSL3 7PE: not on the flood risk listSL3 7PF: not on the flood risk listSL3 7PG: not on the flood risk listSL3 7PH: not on the flood risk listSL3 7PJ: not on the flood risk listSL3 7PL: not on the flood risk listSL3 7PN: not on the flood risk listSL3 7PQ: not on the flood risk listSL3 7PR: not on the flood risk listSL3 7PS: not on the flood risk listSL3 7PU: not on the flood risk listSL3 7PW: not on the flood risk listSL3 7PX: not on the flood risk listSL3 7PY: not on the flood risk listSL3 7PZ: not on the flood risk listSL3 7QA: not on the flood risk listSL3 7QB: not on the flood risk listSL3 7QD: not on the flood risk listSL3 7QE: not on the flood risk listSL3 7QF: not on the flood risk listSL3 7QG: not on the flood risk listSL3 7QH: not on the flood risk listSL3 7QJ: not on the flood risk listSL3 7QL: not on the flood risk listSL3 7QN: not on the flood risk listSL3 7QP: not on the flood risk listSL3 7QQ: not on the flood risk listSL3 7QR: not on the flood risk listSL3 7QT: not on the flood risk listSL3 7QU: not on the flood risk listSL3 7QW: not on the flood risk listSL3 7QX: not on the flood risk listSL3 7QY: not on the flood risk listSL3 7QZ: not on the flood risk listSL3 7RA: not on the flood risk listSL3 7RB: not on the flood risk listSL3 7RD: not on the flood risk listSL3 7RE: not on the flood risk listSL3 7RF: not on the flood risk listSL3 7RG: not on the flood risk listSL3 7RH: not on the flood risk listSL3 7RJ: not on the flood risk listSL3 7RL: not on the flood risk listSL3 7RN: not on the flood risk listSL3 7RP: not on the flood risk listSL3 7RQ: not on the flood risk listSL3 7RR: not on the flood risk listSL3 7RS: not on the flood risk listSL3 7RT: not on the flood risk listSL3 7RU: not on the flood risk listSL3 7RW: not on the flood risk listSL3 7RX: not on the flood risk listSL3 7RY: not on the flood risk listSL3 7RZ: not on the flood risk listSL3 7SA: not on the flood risk listSL3 7SB: not on the flood risk listSL3 7SD: not on the flood risk listSL3 7SE: not on the flood risk listSL3 7SF: not on the flood risk listSL3 7SG: not on the flood risk listSL3 7SH: not on the flood risk listSL3 7SJ: not on the flood risk listSL3 7SL: not on the flood risk listSL3 7SN: not on the flood risk listSL3 7SP: not on the flood risk listSL3 7SQ: not on the flood risk listSL3 7SR: not on the flood risk listSL3 7SU: not on the flood risk listSL3 7SW: not on the flood risk listSL3 7SX: not on the flood risk listSL3 7SY: not on the flood risk listSL3 7SZ: not on the flood risk listSL3 7TA: not on the flood risk listSL3 7TB: not on the flood risk listSL3 7TD: not on the flood risk listSL3 7TE: not on the flood risk listSL3 7TF: not on the flood risk listSL3 7TG: not on the flood risk listSL3 7TH: not on the flood risk listSL3 7TJ: not on the flood risk listSL3 7TL: not on the flood risk listSL3 7TN: not on the flood risk listSL3 7TP: not on the flood risk listSL3 7TQ: not on the flood risk listSL3 7TR: not on the flood risk listSL3 7TS: not on the flood risk listSL3 7TT: not on the flood risk listSL3 7TU: not on the flood risk listSL3 7TW: not on the flood risk listSL3 7TX: not on the flood risk listSL3 7TY: not on the flood risk listSL3 7TZ: not on the flood risk listSL3 7UA: not on the flood risk listSL3 7UB: not on the flood risk listSL3 7UD: not on the flood risk listSL3 7UE: not on the flood risk listSL3 7UF: not on the flood risk listSL3 7UJ: not on the flood risk listSL3 7UQ: not on the flood risk listSL3 7UU: not on the flood risk listSL3 7UW: not on the flood risk listSL3 7UX: not on the flood risk listSL3 7UY: not on the flood risk listSL3 7WH: not on the flood risk listSL3 7XA: not on the flood risk listSL3 7GE: very low flood risk onlySL3 7GF: very low flood risk onlySL3 7GG: very low flood risk onlySL3 7GL: very low flood risk onlySL3 7GN: very low flood risk onlySL3 7GQ: very low flood risk onlySL3 7GU: very low flood risk onlySL3 7GW: very low flood risk onlySL3 7HZ: very low flood risk onlySL3 7JB: very low flood risk onlySL3 7LU: very low flood risk onlySL3 7UG: very low flood risk onlySL3 7UN: very low flood risk onlySL3 7UR: very low flood risk onlySL3 7DT: low flood risk at worstSL3 7FX: low flood risk at worstSL3 7HQ: low flood risk at worstSL3 7JF: low flood risk at worstSL3 7NQ: low flood risk at worstSL3 7DJ: high flood riskSL3 7FG: high flood riskSL3 7FQ: high flood riskSL3 7HN: high flood riskSL3 7HW: high flood riskSL3 7JL: high flood riskSL3 7LT: high flood riskSL3 7NA: high flood riskSL3 7NB: high flood riskSL3 7ND: high flood riskSL3 7NT: high flood risk UptonLangley Marish 9 postcodes at high or medium risk, outlined: this goes to SL3 7FG, the one with most homes and businesses at high risk9 postcodes at high or medium risk Map of every postcode in the SL3 7 sector, by flood risk Of the 297 postcodes in the SL3 7 sector that ONS places, 11 have a home or business at high risk, 5 are at low risk at worst, 14 are at very low risk only and 267 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 9 postcodes at high or medium risk. Places named: Upton, Langley Marish. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. M4A412 UptonLangley Marish
  • A home or business at high risk: 11
  • At medium risk at worst: 0
  • At low risk at worst: 5
  • At very low risk only: 14
  • Not on the at-risk list: 267
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 297 postcodes in the SL3 7 sector that ONS places, 11 have a home or business at high risk, 5 are at low risk at worst, 14 are at very low risk only and 267 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. 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

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

SL3 7FG12 at high riskSL3 7NT11 at high riskSL3 7NB10 at high riskSL3 7HN8 at high riskSL3 7HW8 at high riskSL3 7LT7 at high riskSL3 7FQ5 at high riskSL3 7JL4 at high riskSL3 7DJ3 at high riskSL3 7ND3 at high riskSL3 7NA2 at high risk

Where the postcodes at high or medium risk lie together

  • 9 postcodes at high or medium risk, outlined on the map. SL3 7FG, is the one with most homes and businesses at high risk.

What do homes sell for in SL3 7?

Homes in SL3 7 sold for a typical £560,000 in the 12 months to August 2026, across 73 sales, up 19% on the 12 months before, HM Land Registry's figures show.

£560,000 typical price, the 12 months to August 2026
£470,500 12 months to August 2025
▲ up 19% on the 12 months before
  • Detached £782,500 16 sales
  • Semi-detached £644,000 27 sales
  • Terraced £430,000 16 sales
  • Flat or maisonette £239,000 14 sales

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 SL3 7. 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 SL3 7

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.

SL3 7AASL3 7ABSL3 7ADSL3 7AESL3 7AFSL3 7AGSL3 7AHSL3 7AJSL3 7ALSL3 7ANSL3 7APSL3 7AQSL3 7ARSL3 7ASSL3 7ATSL3 7AUSL3 7AWSL3 7AXSL3 7AYSL3 7AZSL3 7BASL3 7BBSL3 7BDSL3 7BESL3 7BHSL3 7BJSL3 7BLSL3 7BNSL3 7BRSL3 7BSSL3 7BTSL3 7BUSL3 7BWSL3 7BXSL3 7BYSL3 7BZSL3 7DASL3 7DBSL3 7DDSL3 7DESL3 7DFSL3 7DGSL3 7DHSL3 7DJSL3 7DNSL3 7DPSL3 7DQSL3 7DRSL3 7DSSL3 7DTSL3 7DWSL3 7DXSL3 7DYSL3 7DZSL3 7EASL3 7EBSL3 7EDSL3 7EESL3 7EFSL3 7EGSL3 7EJSL3 7ELSL3 7ENSL3 7EQSL3 7ERSL3 7ESSL3 7ETSL3 7EUSL3 7EWSL3 7EXSL3 7EYSL3 7EZSL3 7FDSL3 7FESL3 7FFSL3 7FGSL3 7FHSL3 7FJSL3 7FLSL3 7FNSL3 7FPSL3 7FQSL3 7FRSL3 7FSSL3 7FTSL3 7FUSL3 7FWSL3 7FXSL3 7FYSL3 7FZSL3 7GASL3 7GBSL3 7GDSL3 7GESL3 7GFSL3 7GGSL3 7GHSL3 7GJSL3 7GLSL3 7GNSL3 7GPSL3 7GQSL3 7GRSL3 7GSSL3 7GTSL3 7GUSL3 7GWSL3 7GXSL3 7GYSL3 7GZSL3 7HASL3 7HBSL3 7HDSL3 7HFSL3 7HGSL3 7HHSL3 7HLSL3 7HNSL3 7HPSL3 7HQSL3 7HRSL3 7HSSL3 7HTSL3 7HUSL3 7HWSL3 7HXSL3 7HYSL3 7HZSL3 7JASL3 7JBSL3 7JDSL3 7JFSL3 7JGSL3 7JHSL3 7JJSL3 7JLSL3 7JNSL3 7JPSL3 7JQSL3 7JRSL3 7JSSL3 7JTSL3 7JUSL3 7JWSL3 7JXSL3 7JYSL3 7JZSL3 7LASL3 7LBSL3 7LDSL3 7LESL3 7LFSL3 7LGSL3 7LHSL3 7LJSL3 7LNSL3 7LPSL3 7LQSL3 7LRSL3 7LSSL3 7LTSL3 7LUSL3 7LWSL3 7LXSL3 7LYSL3 7LZSL3 7NASL3 7NBSL3 7NDSL3 7NESL3 7NFSL3 7NGSL3 7NHSL3 7NJSL3 7NLSL3 7NNSL3 7NPSL3 7NQSL3 7NTSL3 7NUSL3 7NWSL3 7NXSL3 7NYSL3 7NZSL3 7PASL3 7PBSL3 7PDSL3 7PESL3 7PFSL3 7PGSL3 7PHSL3 7PJSL3 7PLSL3 7PNSL3 7PQSL3 7PRSL3 7PSSL3 7PUSL3 7PWSL3 7PXSL3 7PYSL3 7PZSL3 7QASL3 7QBSL3 7QDSL3 7QESL3 7QFSL3 7QGSL3 7QHSL3 7QJSL3 7QLSL3 7QNSL3 7QPSL3 7QQSL3 7QRSL3 7QSSL3 7QTSL3 7QUSL3 7QWSL3 7QXSL3 7QYSL3 7QZSL3 7RASL3 7RBSL3 7RDSL3 7RESL3 7RFSL3 7RGSL3 7RHSL3 7RJSL3 7RLSL3 7RNSL3 7RPSL3 7RQSL3 7RRSL3 7RSSL3 7RTSL3 7RUSL3 7RWSL3 7RXSL3 7RYSL3 7RZSL3 7SASL3 7SBSL3 7SDSL3 7SESL3 7SFSL3 7SGSL3 7SHSL3 7SJSL3 7SLSL3 7SNSL3 7SPSL3 7SQSL3 7SRSL3 7SUSL3 7SWSL3 7SXSL3 7SYSL3 7SZSL3 7TASL3 7TBSL3 7TDSL3 7TESL3 7TFSL3 7TGSL3 7THSL3 7TJSL3 7TLSL3 7TNSL3 7TPSL3 7TQSL3 7TRSL3 7TSSL3 7TTSL3 7TUSL3 7TWSL3 7TXSL3 7TYSL3 7TZSL3 7UASL3 7UBSL3 7UDSL3 7UESL3 7UFSL3 7UGSL3 7UJSL3 7UNSL3 7UQSL3 7URSL3 7USSL3 7UUSL3 7UWSL3 7UXSL3 7UYSL3 7WHSL3 7XA

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.

Check a postcode

Something wrong on this page? Report an error and we will check it against the source.