SL1 5 postcode sector in the SL1 district

SL1 5 is a sector of the SL1 district: every postcode that starts SL1 5. It has 250 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 SL1 5 sector, by flood risk

Map of every postcode in the SL1 5 sector, by flood risk Of the 250 postcodes in the SL1 5 sector that ONS places, 45 have a home or business at high risk, 13 are at medium risk at worst, 16 are at low risk at worst, 4 are at very low risk only and 172 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 55 postcodes at high or medium risk. Places named: Slough. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. M4A355 SL1 5AA: not on the flood risk listSL1 5AD: not on the flood risk listSL1 5AE: not on the flood risk listSL1 5AG: not on the flood risk listSL1 5AH: not on the flood risk listSL1 5AL: not on the flood risk listSL1 5AN: not on the flood risk listSL1 5AP: not on the flood risk listSL1 5BA: not on the flood risk listSL1 5BB: not on the flood risk listSL1 5BD: not on the flood risk listSL1 5BE: not on the flood risk listSL1 5BH: not on the flood risk listSL1 5BJ: not on the flood risk listSL1 5BL: not on the flood risk listSL1 5BN: not on the flood risk listSL1 5BP: not on the flood risk listSL1 5BQ: not on the flood risk listSL1 5BS: not on the flood risk listSL1 5BU: not on the flood risk listSL1 5BW: not on the flood risk listSL1 5BX: not on the flood risk listSL1 5BY: not on the flood risk listSL1 5BZ: not on the flood risk listSL1 5DA: not on the flood risk listSL1 5DB: not on the flood risk listSL1 5DD: not on the flood risk listSL1 5DE: not on the flood risk listSL1 5DG: not on the flood risk listSL1 5DH: not on the flood risk listSL1 5DL: not on the flood risk listSL1 5EF: not on the flood risk listSL1 5EJ: not on the flood risk listSL1 5EP: not on the flood risk listSL1 5EQ: not on the flood risk listSL1 5FE: not on the flood risk listSL1 5FF: not on the flood risk listSL1 5FG: not on the flood risk listSL1 5FH: not on the flood risk listSL1 5FQ: not on the flood risk listSL1 5FR: not on the flood risk listSL1 5FS: not on the flood risk listSL1 5FT: not on the flood risk listSL1 5FU: not on the flood risk listSL1 5FW: not on the flood risk listSL1 5FX: not on the flood risk listSL1 5FZ: not on the flood risk listSL1 5GA: not on the flood risk listSL1 5GB: not on the flood risk listSL1 5HA: not on the flood risk listSL1 5HB: not on the flood risk listSL1 5HD: not on the flood risk listSL1 5HE: not on the flood risk listSL1 5HF: not on the flood risk listSL1 5HG: not on the flood risk listSL1 5HP: not on the flood risk listSL1 5HQ: not on the flood risk listSL1 5HS: not on the flood risk listSL1 5HT: not on the flood risk listSL1 5HU: not on the flood risk listSL1 5HX: not on the flood risk listSL1 5HY: not on the flood risk listSL1 5HZ: not on the flood risk listSL1 5JA: not on the flood risk listSL1 5JG: not on the flood risk listSL1 5JH: not on the flood risk listSL1 5JL: not on the flood risk listSL1 5JN: not on the flood risk listSL1 5JP: not on the flood risk listSL1 5JQ: not on the flood risk listSL1 5JR: not on the flood risk listSL1 5JS: not on the flood risk listSL1 5JT: not on the flood risk listSL1 5JU: not on the flood risk listSL1 5JW: not on the flood risk listSL1 5JX: not on the flood risk listSL1 5JY: not on the flood risk listSL1 5JZ: not on the flood risk listSL1 5LA: not on the flood risk listSL1 5LB: not on the flood risk listSL1 5LE: not on the flood risk listSL1 5LF: not on the flood risk listSL1 5LG: not on the flood risk listSL1 5LH: not on the flood risk listSL1 5LJ: not on the flood risk listSL1 5LL: not on the flood risk listSL1 5LN: not on the flood risk listSL1 5LP: not on the flood risk listSL1 5LQ: not on the flood risk listSL1 5LR: not on the flood risk listSL1 5LS: not on the flood risk listSL1 5LT: not on the flood risk listSL1 5LU: not on the flood risk listSL1 5LW: not on the flood risk listSL1 5LX: not on the flood risk listSL1 5NB: not on the flood risk listSL1 5ND: not on the flood risk listSL1 5NH: not on the flood risk listSL1 5NJ: not on the flood risk listSL1 5NL: not on the flood risk listSL1 5NN: not on the flood risk listSL1 5NP: not on the flood risk listSL1 5NR: not on the flood risk listSL1 5NT: not on the flood risk listSL1 5NU: not on the flood risk listSL1 5NW: not on the flood risk listSL1 5NX: not on the flood risk listSL1 5PA: not on the flood risk listSL1 5PB: not on the flood risk listSL1 5PD: not on the flood risk listSL1 5PE: not on the flood risk listSL1 5PF: not on the flood risk listSL1 5PG: not on the flood risk listSL1 5PH: not on the flood risk listSL1 5PJ: not on the flood risk listSL1 5PL: not on the flood risk listSL1 5PP: not on the flood risk listSL1 5PQ: not on the flood risk listSL1 5PR: not on the flood risk listSL1 5PS: not on the flood risk listSL1 5PZ: not on the flood risk listSL1 5QE: not on the flood risk listSL1 5QF: not on the flood risk listSL1 5QG: not on the flood risk listSL1 5QL: not on the flood risk listSL1 5QS: not on the flood risk listSL1 5QT: not on the flood risk listSL1 5QU: not on the flood risk listSL1 5QW: not on the flood risk listSL1 5QX: not on the flood risk listSL1 5QY: not on the flood risk listSL1 5QZ: not on the flood risk listSL1 5RA: not on the flood risk listSL1 5RB: not on the flood risk listSL1 5RD: not on the flood risk listSL1 5RE: not on the flood risk listSL1 5RF: not on the flood risk listSL1 5RG: not on the flood risk listSL1 5RQ: not on the flood risk listSL1 5SN: not on the flood risk listSL1 5SP: not on the flood risk listSL1 5SR: not on the flood risk listSL1 5ST: not on the flood risk listSL1 5SU: not on the flood risk listSL1 5SW: not on the flood risk listSL1 5SX: not on the flood risk listSL1 5SY: not on the flood risk listSL1 5SZ: not on the flood risk listSL1 5TE: not on the flood risk listSL1 5TG: not on the flood risk listSL1 5TH: not on the flood risk listSL1 5TL: not on the flood risk listSL1 5TN: not on the flood risk listSL1 5TQ: not on the flood risk listSL1 5TT: not on the flood risk listSL1 5TU: not on the flood risk listSL1 5TX: not on the flood risk listSL1 5UA: not on the flood risk listSL1 5UB: not on the flood risk listSL1 5UD: not on the flood risk listSL1 5UG: not on the flood risk listSL1 5UH: not on the flood risk listSL1 5UJ: not on the flood risk listSL1 5UN: not on the flood risk listSL1 5UT: not on the flood risk listSL1 5UU: not on the flood risk listSL1 5AZ: very low flood risk onlySL1 5FA: very low flood risk onlySL1 5TW: very low flood risk onlySL1 5UQ: very low flood risk onlySL1 5DW: low flood risk at worstSL1 5EL: low flood risk at worstSL1 5EN: low flood risk at worstSL1 5EW: low flood risk at worstSL1 5JD: low flood risk at worstSL1 5LD: low flood risk at worstSL1 5LY: low flood risk at worstSL1 5LZ: low flood risk at worstSL1 5NA: low flood risk at worstSL1 5TF: low flood risk at worstSL1 5TS: low flood risk at worstSL1 5UE: low flood risk at worstSL1 5UL: low flood risk at worstSL1 5UR: low flood risk at worstSL1 5AW: medium flood risk at worstSL1 5DF: medium flood risk at worstSL1 5EY: medium flood risk at worstSL1 5FB: medium flood risk at worstSL1 5FD: medium flood risk at worstSL1 5FL: medium flood risk at worstSL1 5NF: medium flood risk at worstSL1 5NG: medium flood risk at worstSL1 5TP: medium flood risk at worstSL1 5TR: medium flood risk at worstSL1 5AF: high flood riskSL1 5AQ: high flood riskSL1 5AX: high flood riskSL1 5DJ: high flood riskSL1 5DN: high flood riskSL1 5DP: high flood riskSL1 5DQ: high flood riskSL1 5DR: high flood riskSL1 5DS: high flood riskSL1 5DT: high flood riskSL1 5DU: high flood riskSL1 5DX: high flood riskSL1 5DY: high flood riskSL1 5DZ: high flood riskSL1 5EA: high flood riskSL1 5EB: high flood riskSL1 5ED: high flood riskSL1 5EE: high flood riskSL1 5EG: high flood riskSL1 5ER: high flood riskSL1 5ES: high flood riskSL1 5ET: high flood riskSL1 5EU: high flood riskSL1 5EX: high flood riskSL1 5EZ: high flood riskSL1 5FJ: high flood riskSL1 5FY: high flood riskSL1 5HJ: high flood riskSL1 5HL: high flood riskSL1 5HN: high flood riskSL1 5JB: high flood riskSL1 5JE: high flood riskSL1 5JF: high flood riskSL1 5NE: high flood riskSL1 5NQ: high flood riskSL1 5QA: high flood riskSL1 5QJ: high flood riskSL1 5TJ: high flood riskSL1 5TD: high flood riskSL1 5TY: high flood riskSL1 5TZ: high flood riskSL1 5UF: high flood riskSL1 5UW: high flood riskSL1 5US: high flood riskSL1 5UX: high flood risk Slough 55 postcodes at high or medium risk, outlined: this goes to SL1 5JE, the one with most homes and businesses at high risk55 postcodes at high or medium risk Map of every postcode in the SL1 5 sector, by flood risk Of the 250 postcodes in the SL1 5 sector that ONS places, 45 have a home or business at high risk, 13 are at medium risk at worst, 16 are at low risk at worst, 4 are at very low risk only and 172 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 55 postcodes at high or medium risk. Places named: Slough. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. A355M4A332 Slough
  • A home or business at high risk: 45
  • At medium risk at worst: 13
  • At low risk at worst: 16
  • At very low risk only: 4
  • Not on the at-risk list: 172
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 250 postcodes in the SL1 5 sector that ONS places, 45 have a home or business at high risk, 13 are at medium risk at worst, 16 are at low risk at worst, 4 are at very low risk only and 172 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.

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

45 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.

SL1 5JE32 at high riskSL1 5TD30 at high riskSL1 5EG20 at high riskSL1 5QJ20 at high riskSL1 5EE18 at high riskSL1 5HJ18 at high riskSL1 5HN16 at high riskSL1 5JB14 at high riskSL1 5EA12 at high riskSL1 5ES12 at high riskSL1 5EB10 at high riskSL1 5EU9 at high risk

Where the postcodes at high or medium risk lie together

  • 55 postcodes at high or medium risk, outlined on the map. SL1 5JE, is the one with most homes and businesses at high risk.

What do homes sell for in SL1 5?

Homes in SL1 5 sold for a typical £412,500 in the 12 months to August 2026, across 101 sales, down 1.8% on the 12 months before, HM Land Registry's figures show.

£412,500 typical price, the 12 months to August 2026
£420,000 12 months to August 2025
▼ down 1.8% on the 12 months before
  • Detached £505,000 12 sales
  • Semi-detached £436,975 34 sales
  • Terraced £402,000 41 sales
  • Flat or maisonette £197,000 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 SL1 5. 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 SL1 5

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.

SL1 5AASL1 5ADSL1 5AESL1 5AFSL1 5AGSL1 5AHSL1 5ALSL1 5ANSL1 5APSL1 5AQSL1 5ASSL1 5AWSL1 5AXSL1 5AYSL1 5AZSL1 5BASL1 5BBSL1 5BDSL1 5BESL1 5BHSL1 5BJSL1 5BLSL1 5BNSL1 5BPSL1 5BQSL1 5BSSL1 5BUSL1 5BWSL1 5BXSL1 5BYSL1 5BZSL1 5DASL1 5DBSL1 5DDSL1 5DESL1 5DFSL1 5DGSL1 5DHSL1 5DJSL1 5DLSL1 5DNSL1 5DPSL1 5DQSL1 5DRSL1 5DSSL1 5DTSL1 5DUSL1 5DWSL1 5DXSL1 5DYSL1 5DZSL1 5EASL1 5EBSL1 5EDSL1 5EESL1 5EFSL1 5EGSL1 5EJSL1 5ELSL1 5ENSL1 5EPSL1 5EQSL1 5ERSL1 5ESSL1 5ETSL1 5EUSL1 5EWSL1 5EXSL1 5EYSL1 5EZSL1 5FASL1 5FBSL1 5FDSL1 5FESL1 5FFSL1 5FGSL1 5FHSL1 5FJSL1 5FLSL1 5FNSL1 5FPSL1 5FQSL1 5FRSL1 5FSSL1 5FTSL1 5FUSL1 5FWSL1 5FXSL1 5FYSL1 5FZSL1 5GASL1 5GBSL1 5HASL1 5HBSL1 5HDSL1 5HESL1 5HFSL1 5HGSL1 5HJSL1 5HLSL1 5HNSL1 5HPSL1 5HQSL1 5HSSL1 5HTSL1 5HUSL1 5HWSL1 5HXSL1 5HYSL1 5HZSL1 5JASL1 5JBSL1 5JDSL1 5JESL1 5JFSL1 5JGSL1 5JHSL1 5JLSL1 5JNSL1 5JPSL1 5JQSL1 5JRSL1 5JSSL1 5JTSL1 5JUSL1 5JWSL1 5JXSL1 5JYSL1 5JZSL1 5LASL1 5LBSL1 5LDSL1 5LESL1 5LFSL1 5LGSL1 5LHSL1 5LJSL1 5LLSL1 5LNSL1 5LPSL1 5LQSL1 5LRSL1 5LSSL1 5LTSL1 5LUSL1 5LWSL1 5LXSL1 5LYSL1 5LZSL1 5NASL1 5NBSL1 5NDSL1 5NESL1 5NFSL1 5NGSL1 5NHSL1 5NJSL1 5NLSL1 5NNSL1 5NPSL1 5NQSL1 5NRSL1 5NSSL1 5NTSL1 5NUSL1 5NWSL1 5NXSL1 5NYSL1 5PASL1 5PBSL1 5PDSL1 5PESL1 5PFSL1 5PGSL1 5PHSL1 5PJSL1 5PLSL1 5PPSL1 5PQSL1 5PRSL1 5PSSL1 5PZSL1 5QASL1 5QESL1 5QFSL1 5QGSL1 5QJSL1 5QLSL1 5QSSL1 5QTSL1 5QUSL1 5QWSL1 5QXSL1 5QYSL1 5QZSL1 5RASL1 5RBSL1 5RDSL1 5RESL1 5RFSL1 5RGSL1 5RQSL1 5SNSL1 5SPSL1 5SRSL1 5STSL1 5SUSL1 5SWSL1 5SXSL1 5SYSL1 5SZSL1 5TASL1 5TBSL1 5TDSL1 5TESL1 5TFSL1 5TGSL1 5THSL1 5TJSL1 5TLSL1 5TNSL1 5TPSL1 5TQSL1 5TRSL1 5TSSL1 5TTSL1 5TUSL1 5TWSL1 5TXSL1 5TYSL1 5TZSL1 5UASL1 5UBSL1 5UDSL1 5UESL1 5UFSL1 5UGSL1 5UHSL1 5UJSL1 5ULSL1 5UNSL1 5UPSL1 5UQSL1 5URSL1 5USSL1 5UTSL1 5UUSL1 5UWSL1 5UXSL1 5ZN

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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