SL1 3 postcode sector in the SL1 district
SL1 3 is a sector of the SL1 district: every postcode that starts SL1 3. It has 264 postcodes in use, 8 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 3 sector, by gigabit broadband
- No home or business can get gigabit: 0
- Some can get gigabit: 13
- Every home and business can get gigabit: 242
- Ofcom gives no figure: 9
Of the 264 postcodes in the SL1 3 sector that ONS places, 13 have some that can, 242 can all get it and 9 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. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.
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.
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.
What do homes sell for in SL1 3?
Homes in SL1 3 sold for a typical £380,000 in the 12 months to September 2026, across 63 sales, HM Land Registry's figures show. The 12 months before gave £400,000 from 94 sales: not a change larger than chance would explain, given which homes happened to sell.
- Detached £575,000 5 sales
- Semi-detached £455,000 18 sales
- Terraced £394,250 18 sales
- Flat or maisonette £238,500 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 3. A typical price is the median, the middle sale, given from 5 sales or more.
How we work this out: house prices by postcodeSource: HM Land Registry Price Paid Data, files dated 28 October 2026.
Postcodes in SL1 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.
Source: ONS Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed.
Other sectors in SL1
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Where the facts on this page come from
- Office for National Statistics: ONS Postcode Directory
- Ofcom Connected Nations
- HM Land Registry Price Paid Data
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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