SL1 1 postcode sector in the SL1 district

SL1 1 is a sector of the SL1 district: every postcode that starts SL1 1. It has 182 postcodes in use, 14 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 1 sector, by flood risk

Map of every postcode in the SL1 1 sector, by flood risk Of the 182 postcodes in the SL1 1 sector that ONS places, 1 are at low risk at worst and 181 are not on the Environment Agency's at-risk list. Places named: Herschel Park, Slough Central. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A4A412 SL1 1AA: not on the flood risk listSL1 1AE: not on the flood risk listSL1 1AG: not on the flood risk listSL1 1AN: not on the flood risk listSL1 1AQ: not on the flood risk listSL1 1AW: not on the flood risk listSL1 1AY: not on the flood risk listSL1 1BD: not on the flood risk listSL1 1BH: not on the flood risk listSL1 1BN: not on the flood risk listSL1 1BY: not on the flood risk listSL1 1DB: not on the flood risk listSL1 1DD: not on the flood risk listSL1 1DG: not on the flood risk listSL1 1DH: not on the flood risk listSL1 1DJ: not on the flood risk listSL1 1DL: not on the flood risk listSL1 1DN: not on the flood risk listSL1 1DQ: not on the flood risk listSL1 1DS: not on the flood risk listSL1 1DY: not on the flood risk listSL1 1DZ: not on the flood risk listSL1 1EE: not on the flood risk listSL1 1EH: not on the flood risk listSL1 1EL: not on the flood risk listSL1 1EP: not on the flood risk listSL1 1EQ: not on the flood risk listSL1 1EX: not on the flood risk listSL1 1FF: not on the flood risk listSL1 1FG: not on the flood risk listSL1 1FQ: not on the flood risk listSL1 1GE: not on the flood risk listSL1 1GF: not on the flood risk listSL1 1GG: not on the flood risk listSL1 1GN: not on the flood risk listSL1 1GQ: not on the flood risk listSL1 1GR: not on the flood risk listSL1 1GT: not on the flood risk listSL1 1GU: not on the flood risk listSL1 1GW: not on the flood risk listSL1 1GX: not on the flood risk listSL1 1GZ: not on the flood risk listSL1 1HE: not on the flood risk listSL1 1HF: not on the flood risk listSL1 1HL: not on the flood risk listSL1 1HP: not on the flood risk listSL1 1HQ: not on the flood risk listSL1 1HW: not on the flood risk listSL1 1HX: not on the flood risk listSL1 1HY: not on the flood risk listSL1 1JA: not on the flood risk listSL1 1JF: not on the flood risk listSL1 1JJ: not on the flood risk listSL1 1JL: not on the flood risk listSL1 1JP: not on the flood risk listSL1 1JQ: not on the flood risk listSL1 1JR: not on the flood risk listSL1 1JS: not on the flood risk listSL1 1JU: not on the flood risk listSL1 1LE: not on the flood risk listSL1 1LU: not on the flood risk listSL1 1NB: not on the flood risk listSL1 1NE: not on the flood risk listSL1 1NF: not on the flood risk listSL1 1NG: not on the flood risk listSL1 1NH: not on the flood risk listSL1 1NJ: not on the flood risk listSL1 1NL: not on the flood risk listSL1 1NP: not on the flood risk listSL1 1NR: not on the flood risk listSL1 1NS: not on the flood risk listSL1 1NT: not on the flood risk listSL1 1NU: not on the flood risk listSL1 1NW: not on the flood risk listSL1 1NX: not on the flood risk listSL1 1NY: not on the flood risk listSL1 1NZ: not on the flood risk listSL1 1PA: not on the flood risk listSL1 1PB: not on the flood risk listSL1 1PD: not on the flood risk listSL1 1PE: not on the flood risk listSL1 1PF: not on the flood risk listSL1 1PG: not on the flood risk listSL1 1PJ: not on the flood risk listSL1 1PL: not on the flood risk listSL1 1PP: not on the flood risk listSL1 1PQ: not on the flood risk listSL1 1PR: not on the flood risk listSL1 1PS: not on the flood risk listSL1 1PU: not on the flood risk listSL1 1PW: not on the flood risk listSL1 1PX: not on the flood risk listSL1 1QA: not on the flood risk listSL1 1QH: not on the flood risk listSL1 1QJ: not on the flood risk listSL1 1QN: not on the flood risk listSL1 1QP: not on the flood risk listSL1 1QR: not on the flood risk listSL1 1QS: not on the flood risk listSL1 1QW: not on the flood risk listSL1 1QX: not on the flood risk listSL1 1QZ: not on the flood risk listSL1 1RA: not on the flood risk listSL1 1RB: not on the flood risk listSL1 1RD: not on the flood risk listSL1 1RE: not on the flood risk listSL1 1RF: not on the flood risk listSL1 1RG: not on the flood risk listSL1 1RN: not on the flood risk listSL1 1RP: not on the flood risk listSL1 1RQ: not on the flood risk listSL1 1RR: not on the flood risk listSL1 1RS: not on the flood risk listSL1 1RT: not on the flood risk listSL1 1RU: not on the flood risk listSL1 1RW: not on the flood risk listSL1 1RX: not on the flood risk listSL1 1RZ: not on the flood risk listSL1 1SB: not on the flood risk listSL1 1SD: not on the flood risk listSL1 1SE: not on the flood risk listSL1 1SF: not on the flood risk listSL1 1SG: not on the flood risk listSL1 1SJ: not on the flood risk listSL1 1SN: not on the flood risk listSL1 1SP: not on the flood risk listSL1 1SR: not on the flood risk listSL1 1SU: not on the flood risk listSL1 1SW: not on the flood risk listSL1 1SX: not on the flood risk listSL1 1SZ: not on the flood risk listSL1 1TA: not on the flood risk listSL1 1TB: not on the flood risk listSL1 1TD: not on the flood risk listSL1 1TE: not on the flood risk listSL1 1TF: not on the flood risk listSL1 1TG: not on the flood risk listSL1 1TH: not on the flood risk listSL1 1TJ: not on the flood risk listSL1 1TN: not on the flood risk listSL1 1TP: not on the flood risk listSL1 1TS: not on the flood risk listSL1 1TT: not on the flood risk listSL1 1TW: not on the flood risk listSL1 1TX: not on the flood risk listSL1 1UA: not on the flood risk listSL1 1UB: not on the flood risk listSL1 1UD: not on the flood risk listSL1 1UE: not on the flood risk listSL1 1UG: not on the flood risk listSL1 1UH: not on the flood risk listSL1 1UL: not on the flood risk listSL1 1UN: not on the flood risk listSL1 1UP: not on the flood risk listSL1 1UR: not on the flood risk listSL1 1US: not on the flood risk listSL1 1UT: not on the flood risk listSL1 1UW: not on the flood risk listSL1 1UX: not on the flood risk listSL1 1XA: not on the flood risk listSL1 1XB: not on the flood risk listSL1 1XD: not on the flood risk listSL1 1XN: not on the flood risk listSL1 1XQ: not on the flood risk listSL1 1XU: not on the flood risk listSL1 1XW: not on the flood risk listSL1 1XY: not on the flood risk listSL1 1XZ: not on the flood risk listSL1 1YH: not on the flood risk listSL1 1YW: not on the flood risk listSL1 1NN: low flood risk at worst Herschel ParkSlough Central Map of every postcode in the SL1 1 sector, by flood risk Of the 182 postcodes in the SL1 1 sector that ONS places, 1 are at low risk at worst and 181 are not on the Environment Agency's at-risk list. Places named: Herschel Park, Slough Central. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Herschel ParkSlough Central
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 1
  • At very low risk only: 0
  • Not on the at-risk list: 181

Of the 182 postcodes in the SL1 1 sector that ONS places, 1 are at low risk at worst and 181 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. 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

What do homes sell for in SL1 1?

Homes in SL1 1 sold for a typical £200,000 in the 12 months to August 2026, across 17 sales, down 16.7% on the 12 months before, HM Land Registry's figures show.

£200,000 typical price, the 12 months to August 2026
£240,000 12 months to August 2025
▼ down 16.7% on the 12 months before
  • Detached 1 sale, too few to price
  • Semi-detached 2 sales, too few to price
  • Flat or maisonette £186,000 14 sales

Standard sales of homes at market value at the postcodes that start SL1 1. 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 1

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 1AASL1 1AESL1 1AGSL1 1ALSL1 1ANSL1 1AQSL1 1AWSL1 1AYSL1 1BDSL1 1BHSL1 1BNSL1 1BXSL1 1BYSL1 1DBSL1 1DDSL1 1DGSL1 1DHSL1 1DJSL1 1DLSL1 1DNSL1 1DQSL1 1DSSL1 1DYSL1 1DZSL1 1EESL1 1EHSL1 1ELSL1 1EPSL1 1EQSL1 1ERSL1 1EXSL1 1FFSL1 1FGSL1 1FQSL1 1FSSL1 1GESL1 1GFSL1 1GGSL1 1GNSL1 1GQSL1 1GRSL1 1GTSL1 1GUSL1 1GWSL1 1GXSL1 1GZSL1 1HDSL1 1HESL1 1HFSL1 1HLSL1 1HPSL1 1HQSL1 1HWSL1 1HXSL1 1HYSL1 1HZSL1 1JASL1 1JFSL1 1JJSL1 1JLSL1 1JPSL1 1JQSL1 1JRSL1 1JSSL1 1JUSL1 1LESL1 1LNSL1 1LUSL1 1NBSL1 1NESL1 1NFSL1 1NGSL1 1NHSL1 1NJSL1 1NLSL1 1NNSL1 1NPSL1 1NRSL1 1NSSL1 1NTSL1 1NUSL1 1NWSL1 1NXSL1 1NYSL1 1NZSL1 1PASL1 1PBSL1 1PDSL1 1PESL1 1PFSL1 1PGSL1 1PJSL1 1PLSL1 1PPSL1 1PQSL1 1PRSL1 1PSSL1 1PUSL1 1PWSL1 1PXSL1 1QASL1 1QESL1 1QHSL1 1QJSL1 1QNSL1 1QPSL1 1QRSL1 1QSSL1 1QWSL1 1QXSL1 1QZSL1 1RASL1 1RBSL1 1RDSL1 1RESL1 1RFSL1 1RGSL1 1RNSL1 1RPSL1 1RQSL1 1RRSL1 1RSSL1 1RTSL1 1RUSL1 1RWSL1 1RXSL1 1RZSL1 1SBSL1 1SDSL1 1SESL1 1SFSL1 1SGSL1 1SJSL1 1SNSL1 1SPSL1 1SRSL1 1SUSL1 1SWSL1 1SXSL1 1SZSL1 1TASL1 1TBSL1 1TDSL1 1TESL1 1TFSL1 1TGSL1 1THSL1 1TJSL1 1TNSL1 1TPSL1 1TQSL1 1TSSL1 1TTSL1 1TWSL1 1TXSL1 1UASL1 1UBSL1 1UDSL1 1UESL1 1UGSL1 1UHSL1 1ULSL1 1UNSL1 1UPSL1 1URSL1 1USSL1 1UTSL1 1UWSL1 1UXSL1 1XASL1 1XBSL1 1XDSL1 1XNSL1 1XQSL1 1XUSL1 1XWSL1 1XYSL1 1XZSL1 1YHSL1 1YLSL1 1YPSL1 1YW

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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