SL1 6 postcode sector in the SL1 district

SL1 6 is a sector of the SL1 district: every postcode that starts SL1 6. It has 123 postcodes in use, 4 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 6 sector, by flood risk

Map of every postcode in the SL1 6 sector, by flood risk Of the 123 postcodes in the SL1 6 sector that ONS places, 6 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 113 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: Haymill. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. SL1 6AA: not on the flood risk listSL1 6AB: not on the flood risk listSL1 6AE: not on the flood risk listSL1 6AF: not on the flood risk listSL1 6AG: not on the flood risk listSL1 6AH: not on the flood risk listSL1 6AJ: not on the flood risk listSL1 6AL: not on the flood risk listSL1 6AN: not on the flood risk listSL1 6AQ: not on the flood risk listSL1 6AR: not on the flood risk listSL1 6AS: not on the flood risk listSL1 6AT: not on the flood risk listSL1 6AU: not on the flood risk listSL1 6AW: not on the flood risk listSL1 6AX: not on the flood risk listSL1 6AY: not on the flood risk listSL1 6AZ: not on the flood risk listSL1 6BB: not on the flood risk listSL1 6BD: not on the flood risk listSL1 6BW: not on the flood risk listSL1 6DA: not on the flood risk listSL1 6DD: not on the flood risk listSL1 6DN: not on the flood risk listSL1 6DP: not on the flood risk listSL1 6DQ: not on the flood risk listSL1 6DR: not on the flood risk listSL1 6DS: not on the flood risk listSL1 6DU: not on the flood risk listSL1 6DW: not on the flood risk listSL1 6DY: not on the flood risk listSL1 6EA: not on the flood risk listSL1 6EB: not on the flood risk listSL1 6ED: not on the flood risk listSL1 6EE: not on the flood risk listSL1 6EF: not on the flood risk listSL1 6EG: not on the flood risk listSL1 6EH: not on the flood risk listSL1 6EJ: not on the flood risk listSL1 6EL: not on the flood risk listSL1 6EN: not on the flood risk listSL1 6EP: not on the flood risk listSL1 6EQ: not on the flood risk listSL1 6ER: not on the flood risk listSL1 6ES: not on the flood risk listSL1 6ET: not on the flood risk listSL1 6EU: not on the flood risk listSL1 6EX: not on the flood risk listSL1 6EY: not on the flood risk listSL1 6EZ: not on the flood risk listSL1 6FB: not on the flood risk listSL1 6FD: not on the flood risk listSL1 6FE: not on the flood risk listSL1 6FF: not on the flood risk listSL1 6HA: not on the flood risk listSL1 6HB: not on the flood risk listSL1 6HD: not on the flood risk listSL1 6HE: not on the flood risk listSL1 6HF: not on the flood risk listSL1 6HG: not on the flood risk listSL1 6HH: not on the flood risk listSL1 6HJ: not on the flood risk listSL1 6HN: not on the flood risk listSL1 6HP: not on the flood risk listSL1 6HQ: not on the flood risk listSL1 6HS: not on the flood risk listSL1 6HT: not on the flood risk listSL1 6HW: not on the flood risk listSL1 6JB: not on the flood risk listSL1 6JD: not on the flood risk listSL1 6JE: not on the flood risk listSL1 6JF: not on the flood risk listSL1 6JJ: not on the flood risk listSL1 6JL: not on the flood risk listSL1 6JN: not on the flood risk listSL1 6JP: not on the flood risk listSL1 6JR: not on the flood risk listSL1 6JS: not on the flood risk listSL1 6JT: not on the flood risk listSL1 6JU: not on the flood risk listSL1 6JX: not on the flood risk listSL1 6JY: not on the flood risk listSL1 6JZ: not on the flood risk listSL1 6LA: not on the flood risk listSL1 6LD: not on the flood risk listSL1 6LE: not on the flood risk listSL1 6LG: not on the flood risk listSL1 6LS: not on the flood risk listSL1 6LT: not on the flood risk listSL1 6LX: not on the flood risk listSL1 6LY: not on the flood risk listSL1 6LZ: not on the flood risk listSL1 6NA: not on the flood risk listSL1 6NB: not on the flood risk listSL1 6ND: not on the flood risk listSL1 6NE: not on the flood risk listSL1 6NF: not on the flood risk listSL1 6NG: not on the flood risk listSL1 6NH: not on the flood risk listSL1 6NJ: not on the flood risk listSL1 6NL: not on the flood risk listSL1 6NN: not on the flood risk listSL1 6NQ: not on the flood risk listSL1 6NW: not on the flood risk listSL1 6PA: not on the flood risk listSL1 6PB: not on the flood risk listSL1 6PD: not on the flood risk listSL1 6PE: not on the flood risk listSL1 6PF: not on the flood risk listSL1 6PG: not on the flood risk listSL1 6PP: not on the flood risk listSL1 6PQ: not on the flood risk listSL1 6DX: low flood risk at worstSL1 6LB: low flood risk at worstSL1 6LL: low flood risk at worstSL1 6LP: medium flood risk at worstSL1 6DT: high flood riskSL1 6FA: high flood riskSL1 6JA: high flood riskSL1 6JH: high flood riskSL1 6LH: high flood riskSL1 6LJ: high flood risk Haymill Map of every postcode in the SL1 6 sector, by flood risk Of the 123 postcodes in the SL1 6 sector that ONS places, 6 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 113 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: Haymill. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Haymill
  • A home or business at high risk: 6
  • At medium risk at worst: 1
  • At low risk at worst: 3
  • At very low risk only: 0
  • Not on the at-risk list: 113

Of the 123 postcodes in the SL1 6 sector that ONS places, 6 have a home or business at high risk, 1 are at medium risk at worst, 3 are at low risk at worst and 113 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

The postcodes at high risk

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

SL1 6LJ23 at high riskSL1 6LH12 at high riskSL1 6JH7 at high riskSL1 6DT2 at high riskSL1 6FA1 at high riskSL1 6JA1 at high risk

Further out, not drawn

This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.

SL1 6YJ

What do homes sell for in SL1 6?

Homes in SL1 6 sold for a typical £402,500 in the 12 months to August 2026, across 64 sales, up 25.2% on the 12 months before, HM Land Registry's figures show.

£402,500 typical price, the 12 months to August 2026
£321,500 12 months to August 2025
▲ up 25.2% on the 12 months before
  • Detached £632,500 10 sales
  • Semi-detached £492,750 16 sales
  • Terraced £426,500 16 sales
  • Flat or maisonette £228,000 22 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 6. 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 6

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 6AASL1 6ABSL1 6AESL1 6AFSL1 6AGSL1 6AHSL1 6AJSL1 6ALSL1 6ANSL1 6AQSL1 6ARSL1 6ASSL1 6ATSL1 6AUSL1 6AWSL1 6AXSL1 6AYSL1 6AZSL1 6BBSL1 6BDSL1 6BWSL1 6DASL1 6DDSL1 6DNSL1 6DPSL1 6DQSL1 6DRSL1 6DSSL1 6DTSL1 6DUSL1 6DWSL1 6DXSL1 6DYSL1 6EASL1 6EBSL1 6EDSL1 6EESL1 6EFSL1 6EGSL1 6EHSL1 6EJSL1 6ELSL1 6ENSL1 6EPSL1 6EQSL1 6ERSL1 6ESSL1 6ETSL1 6EUSL1 6EXSL1 6EYSL1 6EZSL1 6FASL1 6FBSL1 6FDSL1 6FESL1 6FFSL1 6HASL1 6HBSL1 6HDSL1 6HESL1 6HFSL1 6HGSL1 6HHSL1 6HJSL1 6HNSL1 6HPSL1 6HQSL1 6HSSL1 6HTSL1 6HWSL1 6JASL1 6JBSL1 6JDSL1 6JESL1 6JFSL1 6JHSL1 6JJSL1 6JLSL1 6JNSL1 6JPSL1 6JRSL1 6JSSL1 6JTSL1 6JUSL1 6JXSL1 6JYSL1 6JZSL1 6LASL1 6LBSL1 6LDSL1 6LESL1 6LGSL1 6LHSL1 6LJSL1 6LLSL1 6LPSL1 6LSSL1 6LTSL1 6LXSL1 6LYSL1 6LZSL1 6NASL1 6NBSL1 6NDSL1 6NESL1 6NFSL1 6NGSL1 6NHSL1 6NJSL1 6NLSL1 6NNSL1 6NQSL1 6NWSL1 6PASL1 6PBSL1 6PDSL1 6PESL1 6PFSL1 6PGSL1 6PPSL1 6PQSL1 6YJ

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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