SL7 3 postcode sector in the SL7 district

SL7 3 is a sector of the SL7 district: every postcode that starts SL7 3. It has 220 postcodes in use, 2 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 SL7 3 sector, by flood risk

Map of every postcode in the SL7 3 sector, by flood risk Of the 220 postcodes in the SL7 3 sector that ONS places, 1 have a home or business at high risk, 4 are at medium risk at worst, 2 are at low risk at worst and 213 are not on the Environment Agency's at-risk list. Places named: Marlow, Marlow Bottom. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. M40A404 SL7 3AA: not on the flood risk listSL7 3AB: not on the flood risk listSL7 3AD: not on the flood risk listSL7 3AE: not on the flood risk listSL7 3AF: not on the flood risk listSL7 3AG: not on the flood risk listSL7 3AH: not on the flood risk listSL7 3AJ: not on the flood risk listSL7 3AL: not on the flood risk listSL7 3AN: not on the flood risk listSL7 3AP: not on the flood risk listSL7 3AQ: not on the flood risk listSL7 3AR: not on the flood risk listSL7 3AS: not on the flood risk listSL7 3AT: not on the flood risk listSL7 3AU: not on the flood risk listSL7 3AW: not on the flood risk listSL7 3AX: not on the flood risk listSL7 3AY: not on the flood risk listSL7 3AZ: not on the flood risk listSL7 3BA: not on the flood risk listSL7 3BB: not on the flood risk listSL7 3BD: not on the flood risk listSL7 3BE: not on the flood risk listSL7 3BF: not on the flood risk listSL7 3BH: not on the flood risk listSL7 3BJ: not on the flood risk listSL7 3BL: not on the flood risk listSL7 3BN: not on the flood risk listSL7 3BQ: not on the flood risk listSL7 3BT: not on the flood risk listSL7 3BU: not on the flood risk listSL7 3BW: not on the flood risk listSL7 3BX: not on the flood risk listSL7 3BY: not on the flood risk listSL7 3BZ: not on the flood risk listSL7 3DA: not on the flood risk listSL7 3DB: not on the flood risk listSL7 3DD: not on the flood risk listSL7 3DE: not on the flood risk listSL7 3DF: not on the flood risk listSL7 3DG: not on the flood risk listSL7 3DH: not on the flood risk listSL7 3DJ: not on the flood risk listSL7 3DL: not on the flood risk listSL7 3DN: not on the flood risk listSL7 3DP: not on the flood risk listSL7 3DQ: not on the flood risk listSL7 3DT: not on the flood risk listSL7 3DU: not on the flood risk listSL7 3DW: not on the flood risk listSL7 3DX: not on the flood risk listSL7 3EA: not on the flood risk listSL7 3EB: not on the flood risk listSL7 3ED: not on the flood risk listSL7 3EE: not on the flood risk listSL7 3EF: not on the flood risk listSL7 3EG: not on the flood risk listSL7 3EH: not on the flood risk listSL7 3EJ: not on the flood risk listSL7 3EL: not on the flood risk listSL7 3EN: not on the flood risk listSL7 3EP: not on the flood risk listSL7 3EQ: not on the flood risk listSL7 3ER: not on the flood risk listSL7 3ES: not on the flood risk listSL7 3ET: not on the flood risk listSL7 3EU: not on the flood risk listSL7 3EW: not on the flood risk listSL7 3EX: not on the flood risk listSL7 3EY: not on the flood risk listSL7 3EZ: not on the flood risk listSL7 3FG: not on the flood risk listSL7 3FH: not on the flood risk listSL7 3FL: not on the flood risk listSL7 3FN: not on the flood risk listSL7 3FP: not on the flood risk listSL7 3FQ: not on the flood risk listSL7 3GZ: not on the flood risk listSL7 3HA: not on the flood risk listSL7 3HB: not on the flood risk listSL7 3HF: not on the flood risk listSL7 3HH: not on the flood risk listSL7 3HJ: not on the flood risk listSL7 3HN: not on the flood risk listSL7 3HP: not on the flood risk listSL7 3HR: not on the flood risk listSL7 3HS: not on the flood risk listSL7 3HT: not on the flood risk listSL7 3HU: not on the flood risk listSL7 3HW: not on the flood risk listSL7 3HX: not on the flood risk listSL7 3HY: not on the flood risk listSL7 3HZ: not on the flood risk listSL7 3JA: not on the flood risk listSL7 3JB: not on the flood risk listSL7 3JD: not on the flood risk listSL7 3JE: not on the flood risk listSL7 3JF: not on the flood risk listSL7 3JG: not on the flood risk listSL7 3JP: not on the flood risk listSL7 3JQ: not on the flood risk listSL7 3JR: not on the flood risk listSL7 3JT: not on the flood risk listSL7 3JU: not on the flood risk listSL7 3JX: not on the flood risk listSL7 3JY: not on the flood risk listSL7 3JZ: not on the flood risk listSL7 3LA: not on the flood risk listSL7 3LB: not on the flood risk listSL7 3LD: not on the flood risk listSL7 3LE: not on the flood risk listSL7 3LF: not on the flood risk listSL7 3LG: not on the flood risk listSL7 3LH: not on the flood risk listSL7 3LJ: not on the flood risk listSL7 3LL: not on the flood risk listSL7 3LN: not on the flood risk listSL7 3LQ: not on the flood risk listSL7 3LT: not on the flood risk listSL7 3LU: not on the flood risk listSL7 3LW: not on the flood risk listSL7 3LX: not on the flood risk listSL7 3LY: not on the flood risk listSL7 3LZ: not on the flood risk listSL7 3NA: not on the flood risk listSL7 3NB: not on the flood risk listSL7 3ND: not on the flood risk listSL7 3NE: not on the flood risk listSL7 3NF: not on the flood risk listSL7 3NG: not on the flood risk listSL7 3NH: not on the flood risk listSL7 3NJ: not on the flood risk listSL7 3NL: not on the flood risk listSL7 3NN: not on the flood risk listSL7 3NQ: not on the flood risk listSL7 3NR: not on the flood risk listSL7 3NS: not on the flood risk listSL7 3NT: not on the flood risk listSL7 3NU: not on the flood risk listSL7 3NW: not on the flood risk listSL7 3NX: not on the flood risk listSL7 3NY: not on the flood risk listSL7 3NZ: not on the flood risk listSL7 3PA: not on the flood risk listSL7 3PB: not on the flood risk listSL7 3PD: not on the flood risk listSL7 3PE: not on the flood risk listSL7 3PF: not on the flood risk listSL7 3PG: not on the flood risk listSL7 3PH: not on the flood risk listSL7 3PJ: not on the flood risk listSL7 3PL: not on the flood risk listSL7 3PN: not on the flood risk listSL7 3PP: not on the flood risk listSL7 3PQ: not on the flood risk listSL7 3PR: not on the flood risk listSL7 3PS: not on the flood risk listSL7 3PT: not on the flood risk listSL7 3PU: not on the flood risk listSL7 3PW: not on the flood risk listSL7 3PX: not on the flood risk listSL7 3PY: not on the flood risk listSL7 3PZ: not on the flood risk listSL7 3QA: not on the flood risk listSL7 3QB: not on the flood risk listSL7 3QD: not on the flood risk listSL7 3QE: not on the flood risk listSL7 3QF: not on the flood risk listSL7 3QG: not on the flood risk listSL7 3QH: not on the flood risk listSL7 3QJ: not on the flood risk listSL7 3QL: not on the flood risk listSL7 3QN: not on the flood risk listSL7 3QP: not on the flood risk listSL7 3QQ: not on the flood risk listSL7 3QR: not on the flood risk listSL7 3QT: not on the flood risk listSL7 3QU: not on the flood risk listSL7 3QW: not on the flood risk listSL7 3QY: not on the flood risk listSL7 3RA: not on the flood risk listSL7 3RB: not on the flood risk listSL7 3RD: not on the flood risk listSL7 3RE: not on the flood risk listSL7 3RF: not on the flood risk listSL7 3RG: not on the flood risk listSL7 3RJ: not on the flood risk listSL7 3RL: not on the flood risk listSL7 3RN: not on the flood risk listSL7 3RP: not on the flood risk listSL7 3RR: not on the flood risk listSL7 3RS: not on the flood risk listSL7 3RU: not on the flood risk listSL7 3RW: not on the flood risk listSL7 3RZ: not on the flood risk listSL7 3SA: not on the flood risk listSL7 3SD: not on the flood risk listSL7 3SE: not on the flood risk listSL7 3SF: not on the flood risk listSL7 3SG: not on the flood risk listSL7 3SL: not on the flood risk listSL7 3SR: not on the flood risk listSL7 3SY: not on the flood risk listSL7 3TB: not on the flood risk listSL7 3TZ: not on the flood risk listSL7 3XA: not on the flood risk listSL7 3XB: not on the flood risk listSL7 3XD: not on the flood risk listSL7 3YA: not on the flood risk listSL7 3FJ: low flood risk at worstSL7 3RH: low flood risk at worstSL7 3RQ: medium flood risk at worstSL7 3RT: medium flood risk at worstSL7 3RY: medium flood risk at worstSL7 3SB: medium flood risk at worstSL7 3RX: high flood risk MarlowMarlow Bottom Map of every postcode in the SL7 3 sector, by flood risk Of the 220 postcodes in the SL7 3 sector that ONS places, 1 have a home or business at high risk, 4 are at medium risk at worst, 2 are at low risk at worst and 213 are not on the Environment Agency's at-risk list. Places named: Marlow, Marlow Bottom. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 1 km. MarlowMarlow Bottom
  • A home or business at high risk: 1
  • At medium risk at worst: 4
  • At low risk at worst: 2
  • At very low risk only: 0
  • Not on the at-risk list: 213

Of the 220 postcodes in the SL7 3 sector that ONS places, 1 have a home or business at high risk, 4 are at medium risk at worst, 2 are at low risk at worst and 213 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.

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.

SL7 3RX1 at high risk

What do homes sell for in SL7 3?

Homes in SL7 3 sold for a typical £700,000 in the 12 months to August 2026, across 71 sales, up 3.7% on the 12 months before, HM Land Registry's figures show.

£700,000 typical price, the 12 months to August 2026
£675,000 12 months to August 2025
▲ up 3.7% on the 12 months before
  • Detached £850,000 32 sales
  • Semi-detached £607,500 18 sales
  • Terraced £588,000 12 sales
  • Flat or maisonette £250,000 9 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 SL7 3. 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 SL7 3

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.

SL7 3AASL7 3ABSL7 3ADSL7 3AESL7 3AFSL7 3AGSL7 3AHSL7 3AJSL7 3ALSL7 3ANSL7 3APSL7 3AQSL7 3ARSL7 3ASSL7 3ATSL7 3AUSL7 3AWSL7 3AXSL7 3AYSL7 3AZSL7 3BASL7 3BBSL7 3BDSL7 3BESL7 3BFSL7 3BGSL7 3BHSL7 3BJSL7 3BLSL7 3BNSL7 3BQSL7 3BTSL7 3BUSL7 3BWSL7 3BXSL7 3BYSL7 3BZSL7 3DASL7 3DBSL7 3DDSL7 3DESL7 3DFSL7 3DGSL7 3DHSL7 3DJSL7 3DLSL7 3DNSL7 3DPSL7 3DQSL7 3DTSL7 3DUSL7 3DWSL7 3DXSL7 3EASL7 3EBSL7 3EDSL7 3EESL7 3EFSL7 3EGSL7 3EHSL7 3EJSL7 3ELSL7 3ENSL7 3EPSL7 3EQSL7 3ERSL7 3ESSL7 3ETSL7 3EUSL7 3EWSL7 3EXSL7 3EYSL7 3EZSL7 3FGSL7 3FHSL7 3FJSL7 3FLSL7 3FNSL7 3FPSL7 3FQSL7 3GZSL7 3HASL7 3HBSL7 3HFSL7 3HHSL7 3HJSL7 3HLSL7 3HNSL7 3HPSL7 3HRSL7 3HSSL7 3HTSL7 3HUSL7 3HWSL7 3HXSL7 3HYSL7 3HZSL7 3JASL7 3JBSL7 3JDSL7 3JESL7 3JFSL7 3JGSL7 3JHSL7 3JPSL7 3JQSL7 3JRSL7 3JTSL7 3JUSL7 3JXSL7 3JYSL7 3JZSL7 3LASL7 3LBSL7 3LDSL7 3LESL7 3LFSL7 3LGSL7 3LHSL7 3LJSL7 3LLSL7 3LNSL7 3LQSL7 3LTSL7 3LUSL7 3LWSL7 3LXSL7 3LYSL7 3LZSL7 3NASL7 3NBSL7 3NDSL7 3NESL7 3NFSL7 3NGSL7 3NHSL7 3NJSL7 3NLSL7 3NNSL7 3NQSL7 3NRSL7 3NSSL7 3NTSL7 3NUSL7 3NWSL7 3NXSL7 3NYSL7 3NZSL7 3PASL7 3PBSL7 3PDSL7 3PESL7 3PFSL7 3PGSL7 3PHSL7 3PJSL7 3PLSL7 3PNSL7 3PPSL7 3PQSL7 3PRSL7 3PSSL7 3PTSL7 3PUSL7 3PWSL7 3PXSL7 3PYSL7 3PZSL7 3QASL7 3QBSL7 3QDSL7 3QESL7 3QFSL7 3QGSL7 3QHSL7 3QJSL7 3QLSL7 3QNSL7 3QPSL7 3QQSL7 3QRSL7 3QTSL7 3QUSL7 3QWSL7 3QYSL7 3RASL7 3RBSL7 3RDSL7 3RESL7 3RFSL7 3RGSL7 3RHSL7 3RJSL7 3RLSL7 3RNSL7 3RPSL7 3RQSL7 3RRSL7 3RSSL7 3RTSL7 3RUSL7 3RWSL7 3RXSL7 3RYSL7 3RZSL7 3SASL7 3SBSL7 3SDSL7 3SESL7 3SFSL7 3SGSL7 3SLSL7 3SRSL7 3SYSL7 3TBSL7 3TZSL7 3XASL7 3XBSL7 3XDSL7 3YA

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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