N21 3 postcode sector in the N21 district
N21 3 is a sector of the N21 district: every postcode that starts N21 3. It has 157 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 N21 3 sector, by gigabit broadband
- No home or business can get gigabit: 6
- Some can get gigabit: 35
- Every home and business can get gigabit: 114
- Ofcom gives no figure: 2
Of the 157 postcodes in the N21 3 sector that ONS places, 6 have no home or business that can get gigabit, 35 have some that can, 114 can all get it and 2 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. 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.
What do homes sell for in N21 3?
Homes in N21 3 sold for a typical £587,500 in the 12 months to September 2026, across 60 sales, HM Land Registry's figures show. The 12 months before gave £700,000 from 90 sales: not a change larger than chance would explain, given which homes happened to sell.
- Detached £2,300,000 7 sales
- Semi-detached £810,000 15 sales
- Terraced £610,000 17 sales
- Flat or maisonette £375,000 21 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 N21 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 N21 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 N21
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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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