SL3 6 postcode sector in the SL3 district

SL3 6 is a sector of the SL3 district: every postcode that starts SL3 6. It has 141 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 SL3 6 sector, by flood risk

Map of every postcode in the SL3 6 sector, by flood risk Of the 141 postcodes in the SL3 6 sector that ONS places, 14 have a home or business at high risk, 4 are at medium risk at worst, 10 are at low risk at worst and 113 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 6 postcodes at high or medium risk. Places named: Iver Heath, Stoke Poges. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. M40 SL3 6AA: not on the flood risk listSL3 6AB: not on the flood risk listSL3 6AD: not on the flood risk listSL3 6AG: not on the flood risk listSL3 6AJ: not on the flood risk listSL3 6AS: not on the flood risk listSL3 6AT: not on the flood risk listSL3 6AU: not on the flood risk listSL3 6AW: not on the flood risk listSL3 6AX: not on the flood risk listSL3 6BD: not on the flood risk listSL3 6BE: not on the flood risk listSL3 6BG: not on the flood risk listSL3 6BH: not on the flood risk listSL3 6BJ: not on the flood risk listSL3 6BL: not on the flood risk listSL3 6BN: not on the flood risk listSL3 6BQ: not on the flood risk listSL3 6BZ: not on the flood risk listSL3 6DA: not on the flood risk listSL3 6DB: not on the flood risk listSL3 6DE: not on the flood risk listSL3 6DG: not on the flood risk listSL3 6DL: not on the flood risk listSL3 6DN: not on the flood risk listSL3 6DR: not on the flood risk listSL3 6DS: not on the flood risk listSL3 6DT: not on the flood risk listSL3 6DU: not on the flood risk listSL3 6DW: not on the flood risk listSL3 6ED: not on the flood risk listSL3 6EP: not on the flood risk listSL3 6EZ: not on the flood risk listSL3 6HA: not on the flood risk listSL3 6HB: not on the flood risk listSL3 6HD: not on the flood risk listSL3 6HF: not on the flood risk listSL3 6HG: not on the flood risk listSL3 6HP: not on the flood risk listSL3 6HR: not on the flood risk listSL3 6HT: not on the flood risk listSL3 6HU: not on the flood risk listSL3 6HW: not on the flood risk listSL3 6HX: not on the flood risk listSL3 6JA: not on the flood risk listSL3 6JB: not on the flood risk listSL3 6JD: not on the flood risk listSL3 6JE: not on the flood risk listSL3 6JF: not on the flood risk listSL3 6JG: not on the flood risk listSL3 6JH: not on the flood risk listSL3 6JJ: not on the flood risk listSL3 6JL: not on the flood risk listSL3 6JN: not on the flood risk listSL3 6JQ: not on the flood risk listSL3 6JT: not on the flood risk listSL3 6LA: not on the flood risk listSL3 6LB: not on the flood risk listSL3 6LE: not on the flood risk listSL3 6LG: not on the flood risk listSL3 6LJ: not on the flood risk listSL3 6LP: not on the flood risk listSL3 6LQ: not on the flood risk listSL3 6LS: not on the flood risk listSL3 6LT: not on the flood risk listSL3 6LU: not on the flood risk listSL3 6LW: not on the flood risk listSL3 6LZ: not on the flood risk listSL3 6NA: not on the flood risk listSL3 6NB: not on the flood risk listSL3 6ND: not on the flood risk listSL3 6NG: not on the flood risk listSL3 6NH: not on the flood risk listSL3 6NJ: not on the flood risk listSL3 6NL: not on the flood risk listSL3 6NP: not on the flood risk listSL3 6NQ: not on the flood risk listSL3 6NR: not on the flood risk listSL3 6NS: not on the flood risk listSL3 6NT: not on the flood risk listSL3 6NW: not on the flood risk listSL3 6NX: not on the flood risk listSL3 6NY: not on the flood risk listSL3 6NZ: not on the flood risk listSL3 6PA: not on the flood risk listSL3 6PB: not on the flood risk listSL3 6PD: not on the flood risk listSL3 6PG: not on the flood risk listSL3 6PJ: not on the flood risk listSL3 6QH: not on the flood risk listSL3 6RA: not on the flood risk listSL3 6RD: not on the flood risk listSL3 6RE: not on the flood risk listSL3 6RF: not on the flood risk listSL3 6RG: not on the flood risk listSL3 6RH: not on the flood risk listSL3 6RL: not on the flood risk listSL3 6RP: not on the flood risk listSL3 6RQ: not on the flood risk listSL3 6RW: not on the flood risk listSL3 6SA: not on the flood risk listSL3 6SB: not on the flood risk listSL3 6BY: low flood risk at worstSL3 6DD: low flood risk at worstSL3 6EG: low flood risk at worstSL3 6EY: low flood risk at worstSL3 6HL: low flood risk at worstSL3 6HN: low flood risk at worstSL3 6LY: low flood risk at worstSL3 6QB: low flood risk at worstSL3 6QF: low flood risk at worstSL3 6AR: medium flood risk at worstSL3 6BU: medium flood risk at worstSL3 6DH: medium flood risk at worstSL3 6HJ: medium flood risk at worstSL3 6AE: high flood riskSL3 6AN: high flood riskSL3 6AP: high flood riskSL3 6BS: high flood riskSL3 6LF: high flood riskSL3 6LH: high flood riskSL3 6LL: high flood riskSL3 6LN: high flood riskSL3 6LX: high flood riskSL3 6QA: high flood riskSL3 6QD: high flood riskSL3 6QE: high flood riskSL3 6QJ: high flood riskSL3 6QQ: high flood risk Iver HeathStoke Poges 6 postcodes at high or medium risk, outlined: this goes to SL3 6AE, the one with most homes and businesses at high risk6 postcodes at high or medium risk Map of every postcode in the SL3 6 sector, by flood risk Of the 141 postcodes in the SL3 6 sector that ONS places, 14 have a home or business at high risk, 4 are at medium risk at worst, 10 are at low risk at worst and 113 are not on the Environment Agency's at-risk list. One group of postcodes at high or medium risk is outlined: 6 postcodes at high or medium risk. Places named: Stoke Poges. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. M25 Stoke Poges
  • A home or business at high risk: 14
  • At medium risk at worst: 4
  • At low risk at worst: 10
  • At very low risk only: 0
  • Not on the at-risk list: 113
  • Outline: where 5 or more postcodes at high or medium risk lie together

Of the 141 postcodes in the SL3 6 sector that ONS places, 14 have a home or business at high risk, 4 are at medium risk at worst, 10 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. A dashed outline shows where 5 or more lie within 170 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

14 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.

SL3 6AE13 at high riskSL3 6QA12 at high riskSL3 6BS9 at high riskSL3 6QQ4 at high riskSL3 6QE2 at high riskSL3 6LH2 at high riskSL3 6LN2 at high riskSL3 6QD2 at high riskSL3 6AN1 at high riskSL3 6AP1 at high riskSL3 6LF1 at high riskSL3 6LL1 at high risk

Where the postcodes at high or medium risk lie together

  • 6 postcodes at high or medium risk, outlined on the map. SL3 6AE, is the one with most homes and businesses at high risk.

What do homes sell for in SL3 6?

Homes in SL3 6 sold for a typical £610,000 in the 12 months to August 2026, across 26 sales, up 21.4% on the 12 months before, HM Land Registry's figures show.

£610,000 typical price, the 12 months to August 2026
£502,500 12 months to August 2025
▲ up 21.4% on the 12 months before
  • Detached £808,000 10 sales
  • Semi-detached 4 sales, too few to price
  • Terraced £485,000 8 sales
  • Flat or maisonette 4 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 SL3 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 SL3 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.

SL3 6AASL3 6ABSL3 6ADSL3 6AESL3 6AGSL3 6AJSL3 6ANSL3 6APSL3 6ARSL3 6ASSL3 6ATSL3 6AUSL3 6AWSL3 6AXSL3 6AYSL3 6BBSL3 6BDSL3 6BESL3 6BGSL3 6BHSL3 6BJSL3 6BLSL3 6BNSL3 6BPSL3 6BQSL3 6BSSL3 6BUSL3 6BYSL3 6BZSL3 6DASL3 6DBSL3 6DDSL3 6DESL3 6DGSL3 6DHSL3 6DLSL3 6DNSL3 6DQSL3 6DRSL3 6DSSL3 6DTSL3 6DUSL3 6DWSL3 6EASL3 6EDSL3 6EGSL3 6EPSL3 6EYSL3 6EZSL3 6HASL3 6HBSL3 6HDSL3 6HFSL3 6HGSL3 6HJSL3 6HLSL3 6HNSL3 6HPSL3 6HRSL3 6HSSL3 6HTSL3 6HUSL3 6HWSL3 6HXSL3 6JASL3 6JBSL3 6JDSL3 6JESL3 6JFSL3 6JGSL3 6JHSL3 6JJSL3 6JLSL3 6JNSL3 6JQSL3 6JTSL3 6LASL3 6LBSL3 6LESL3 6LFSL3 6LGSL3 6LHSL3 6LJSL3 6LLSL3 6LNSL3 6LPSL3 6LQSL3 6LSSL3 6LTSL3 6LUSL3 6LWSL3 6LXSL3 6LYSL3 6LZSL3 6NASL3 6NBSL3 6NDSL3 6NGSL3 6NHSL3 6NJSL3 6NLSL3 6NNSL3 6NPSL3 6NQSL3 6NRSL3 6NSSL3 6NTSL3 6NUSL3 6NWSL3 6NXSL3 6NYSL3 6NZSL3 6PASL3 6PBSL3 6PDSL3 6PGSL3 6PJSL3 6QASL3 6QBSL3 6QDSL3 6QESL3 6QFSL3 6QGSL3 6QHSL3 6QJSL3 6QQSL3 6RASL3 6RDSL3 6RESL3 6RFSL3 6RGSL3 6RHSL3 6RLSL3 6RNSL3 6RPSL3 6RQSL3 6RRSL3 6RWSL3 6SASL3 6SBSL3 6YU

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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