SL4 1 postcode sector in the SL4 district

SL4 1 is a sector of the SL4 district: every postcode that starts SL4 1. It has 158 postcodes in use, 18 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 SL4 1 sector, by gigabit broadband

Map of every postcode in the SL4 1 sector, by gigabit broadband Of the 158 postcodes in the SL4 1 sector that ONS places, 77 have no home or business that can get gigabit, 25 have some that can, 49 can all get it and 7 have no Ofcom figure. One group of postcodes without gigabit is outlined: 75 postcodes without gigabit. Places named: Eton & Castle. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A308 SL4 1HF: no Ofcom figureSL4 1NQ: no Ofcom figureSL4 1QY: no Ofcom figureSL4 1AA: gigabit for allSL4 1AN: gigabit for allSL4 1BE: gigabit for allSL4 1BF: gigabit for allSL4 1BH: gigabit for allSL4 1BP: gigabit for allSL4 1BQ: gigabit for allSL4 1BY: gigabit for allSL4 1EQ: gigabit for allSL4 1GF: gigabit for allSL4 1HH: gigabit for allSL4 1HL: gigabit for allSL4 1HN: gigabit for allSL4 1HP: gigabit for allSL4 1HR: gigabit for allSL4 1HS: gigabit for allSL4 1HT: gigabit for allSL4 1HU: gigabit for allSL4 1HW: gigabit for allSL4 1HX: gigabit for allSL4 1HY: gigabit for allSL4 1HZ: gigabit for allSL4 1JA: gigabit for allSL4 1JB: gigabit for allSL4 1JD: gigabit for allSL4 1JE: gigabit for allSL4 1JG: gigabit for allSL4 1JH: gigabit for allSL4 1JJ: gigabit for allSL4 1JL: gigabit for allSL4 1JN: gigabit for allSL4 1JP: gigabit for allSL4 1JU: gigabit for allSL4 1RB: gigabit for allSL4 1RF: gigabit for allSL4 1RS: gigabit for allSL4 1RT: gigabit for allSL4 1RY: gigabit for allSL4 1RZ: gigabit for allSL4 1SA: gigabit for allSL4 1SB: gigabit for allSL4 1SH: gigabit for allSL4 1SJ: gigabit for allSL4 1SP: gigabit for allSL4 1SQ: gigabit for allSL4 1SS: gigabit for allSL4 1ST: gigabit for allSL4 1SU: gigabit for allSL4 1SX: gigabit for allSL4 1BA: some gigabitSL4 1BB: some gigabitSL4 1BG: some gigabitSL4 1BN: some gigabitSL4 1DG: some gigabitSL4 1DH: some gigabitSL4 1DN: some gigabitSL4 1DT: some gigabitSL4 1DU: some gigabitSL4 1DW: some gigabitSL4 1EA: some gigabitSL4 1EG: some gigabitSL4 1EH: some gigabitSL4 1HA: some gigabitSL4 1HQ: some gigabitSL4 1JQ: some gigabitSL4 1LB: some gigabitSL4 1LU: some gigabitSL4 1PE: some gigabitSL4 1QZ: some gigabitSL4 1RU: some gigabitSL4 1RX: some gigabitSL4 1SE: some gigabitSL4 1AF: no gigabitSL4 1AG: no gigabitSL4 1AT: no gigabitSL4 1BZ: no gigabitSL4 1DA: no gigabitSL4 1DD: no gigabitSL4 1DL: no gigabitSL4 1DP: no gigabitSL4 1DS: no gigabitSL4 1ED: no gigabitSL4 1EF: no gigabitSL4 1EL: no gigabitSL4 1EN: no gigabitSL4 1EP: no gigabitSL4 1ER: no gigabitSL4 1ET: no gigabitSL4 1EU: no gigabitSL4 1EW: no gigabitSL4 1FA: no gigabitSL4 1HB: no gigabitSL4 1HD: no gigabitSL4 1HE: no gigabitSL4 1HG: no gigabitSL4 1HJ: no gigabitSL4 1JF: no gigabitSL4 1LA: no gigabitSL4 1LD: no gigabitSL4 1LH: no gigabitSL4 1LJ: no gigabitSL4 1LP: no gigabitSL4 1LR: no gigabitSL4 1LS: no gigabitSL4 1LY: no gigabitSL4 1NA: no gigabitSL4 1NG: no gigabitSL4 1NJ: no gigabitSL4 1PA: no gigabitSL4 1PB: no gigabitSL4 1PD: no gigabitSL4 1PF: no gigabitSL4 1PJ: no gigabitSL4 1PL: no gigabitSL4 1PQ: no gigabitSL4 1PR: no gigabitSL4 1PS: no gigabitSL4 1PU: no gigabitSL4 1PW: no gigabitSL4 1PX: no gigabitSL4 1QB: no gigabitSL4 1QD: no gigabitSL4 1QE: no gigabitSL4 1QG: no gigabitSL4 1QL: no gigabitSL4 1QP: no gigabitSL4 1QT: no gigabitSL4 1QW: no gigabitSL4 1QX: no gigabitSL4 1RD: no gigabitSL4 1RH: no gigabitSL4 1RL: no gigabitSL4 1RQ: no gigabitSL4 1SN: no gigabitSL4 1SR: no gigabitSL4 1SY: no gigabitSL4 1SZ: no gigabitSL4 1TA: no gigabitSL4 1TB: no gigabitSL4 1TD: no gigabitSL4 1TE: no gigabitSL4 1TF: no gigabitSL4 1TG: no gigabitSL4 1TH: no gigabitSL4 1TQ: no gigabitSL4 1TX: no gigabitSL4 1UT: no gigabitSL4 1YA: no gigabitSL4 1AE: no gigabit Eton & Castle 75 postcodes without gigabit, outlined: this goes to SL4 1DS, the one nearest the middle of them75 postcodes without gigabit Map of every postcode in the SL4 1 sector, by gigabit broadband Of the 158 postcodes in the SL4 1 sector that ONS places, 77 have no home or business that can get gigabit, 25 have some that can, 49 can all get it and 7 have no Ofcom figure. One group of postcodes without gigabit is outlined: 75 postcodes without gigabit. Places named: Eton & Castle. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. Eton & Castle
  • No home or business can get gigabit: 77
  • Some can get gigabit: 25
  • Every home and business can get gigabit: 49
  • Ofcom gives no figure: 7
  • Outline: where 5 or more postcodes without gigabit lie together

Of the 158 postcodes in the SL4 1 sector that ONS places, 77 have no home or business that can get gigabit, 25 have some that can, 49 can all get it and 7 have no Ofcom figure.

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. Names in italics are council wards: we hold no town or village names here.

Sources: ONS Postcode Directory, August 2026, loaded 20 October 2026; Ofcom Connected Nations, Connected Nations, Spring 2026; roads, rivers and built-up areas: Ordnance Survey open maps. 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.

Postcodes without gigabit

77 postcodes here have no gigabit. These are the 12 first in postcode order.

SL4 1AESL4 1AFSL4 1AGSL4 1ATSL4 1BZSL4 1DASL4 1DDSL4 1DLSL4 1DPSL4 1DSSL4 1EDSL4 1EF

Where the postcodes without gigabit lie together

  • 75 postcodes without gigabit, outlined on the map. SL4 1DS, is the one nearest the middle of them.

What do homes sell for in SL4 1?

Homes in SL4 1 sold for a typical £468,000 in the 12 months to September 2026, across 33 sales, HM Land Registry's figures show. The 12 months before gave £530,000 from 45 sales: not a change larger than chance would explain, given which homes happened to sell.

£468,000 typical price, the 12 months to September 2026
£530,000 12 months to September 2025
  • Detached 2 sales, too few to price
  • Semi-detached 3 sales, too few to price
  • Terraced £592,500 14 sales
  • Flat or maisonette £312,500 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 SL4 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 October 2026.

Postcodes in SL4 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.

SL4 1AASL4 1AESL4 1AFSL4 1AGSL4 1ANSL4 1ATSL4 1BASL4 1BBSL4 1BESL4 1BFSL4 1BGSL4 1BHSL4 1BNSL4 1BPSL4 1BQSL4 1BYSL4 1BZSL4 1DASL4 1DDSL4 1DESL4 1DGSL4 1DHSL4 1DLSL4 1DNSL4 1DPSL4 1DSSL4 1DTSL4 1DUSL4 1DWSL4 1EASL4 1EDSL4 1EFSL4 1EGSL4 1EHSL4 1ELSL4 1ENSL4 1EPSL4 1EQSL4 1ERSL4 1ETSL4 1EUSL4 1EWSL4 1FASL4 1GFSL4 1GTSL4 1HASL4 1HBSL4 1HDSL4 1HESL4 1HFSL4 1HGSL4 1HHSL4 1HJSL4 1HLSL4 1HNSL4 1HPSL4 1HQSL4 1HRSL4 1HSSL4 1HTSL4 1HUSL4 1HWSL4 1HXSL4 1HYSL4 1HZSL4 1JASL4 1JBSL4 1JDSL4 1JESL4 1JFSL4 1JGSL4 1JHSL4 1JJSL4 1JLSL4 1JNSL4 1JPSL4 1JQSL4 1JUSL4 1LASL4 1LBSL4 1LDSL4 1LHSL4 1LJSL4 1LPSL4 1LRSL4 1LSSL4 1LUSL4 1LYSL4 1NASL4 1NGSL4 1NJSL4 1NQSL4 1PASL4 1PBSL4 1PDSL4 1PESL4 1PFSL4 1PJSL4 1PLSL4 1PQSL4 1PRSL4 1PSSL4 1PUSL4 1PWSL4 1PXSL4 1QBSL4 1QDSL4 1QESL4 1QFSL4 1QGSL4 1QLSL4 1QNSL4 1QPSL4 1QTSL4 1QWSL4 1QXSL4 1QYSL4 1QZSL4 1RBSL4 1RDSL4 1RFSL4 1RHSL4 1RLSL4 1RQSL4 1RSSL4 1RTSL4 1RUSL4 1RXSL4 1RYSL4 1RZSL4 1SASL4 1SBSL4 1SESL4 1SHSL4 1SJSL4 1SNSL4 1SPSL4 1SQSL4 1SRSL4 1SSSL4 1STSL4 1SUSL4 1SXSL4 1SYSL4 1SZSL4 1TASL4 1TBSL4 1TDSL4 1TESL4 1TFSL4 1TGSL4 1THSL4 1TQSL4 1TXSL4 1UTSL4 1WZSL4 1YASL4 1ZN

Source: ONS Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed.

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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Where the facts on this page come from

Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2021. This data is licensed under the Open Government Licence v3.0.

Licence: Open Government Licence v3.0.

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