S21 4 postcode sector in the S21 district
S21 4 is a sector of the S21 district: every postcode that starts S21 4. It has 170 postcodes in use, one of them a large-user postcode. 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 S21 4 sector, by gigabit broadband
- No home or business can get gigabit: 7
- Some can get gigabit: 20
- Every home and business can get gigabit: 143
- Ofcom gives no figure: 0
Of the 170 postcodes in the S21 4 sector that ONS places, 7 have no home or business that can get gigabit, 20 have some that can and 143 can all get it.
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.
What do homes sell for in S21 4?
Homes in S21 4 sold for a typical £220,000 in the 12 months to September 2026, across 75 sales, HM Land Registry's figures show. The 12 months before gave £190,000 from 101 sales: not a change larger than chance would explain, given which homes happened to sell.
- Detached £341,500 30 sales
- Semi-detached £177,500 23 sales
- Terraced £163,500 19 sales
- Flat or maisonette 3 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 S21 4. 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 S21 4
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 S21
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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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