TS21 postcode district: Sedgefield and around
TS21 is a postcode district in England, with 545 postcodes in use in 4 sectors. It has postcodes in Sedgefield, Fishburn and Stockton-on-Tees. It is split between 3 councils: County Durham (303 postcodes), Stockton-on-Tees (208) and Darlington (34).
- Postcodes in use
- 545
- Sectors
- 4
- Councils
- 3 councils
- Places
- 3 places
Source: ONS Postcode Directory, August 2026, loaded 20 October 2026.
Every postcode in TS21, by gigabit broadband
- No home or business can get gigabit: 306
- Some can get gigabit: 53
- Every home and business can get gigabit: 170
- Ofcom gives no figure: 16
- Outline: where 5 or more postcodes without gigabit lie together
Of the 545 postcodes in TS21 that ONS places, 306 have no home or business that can get gigabit, 53 have some that can, 170 can all get it and 16 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 180 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.
The middle of its postcodes: latitude 54.6256, longitude -1.4264. Open this area on OpenStreetMap
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
306 postcodes here have no gigabit. These are the 12 first in postcode order.
Where the postcodes without gigabit lie together
- 30 postcodes without gigabit, outlined on the map. TS21 1JJ, is the one nearest the middle of them.
- 25 postcodes without gigabit, outlined on the map. TS21 1DL, is the one nearest the middle of them.
- 22 postcodes without gigabit, outlined on the map. TS21 1EA, is the one nearest the middle of them.
- 17 postcodes without gigabit, outlined on the map. TS21 3JU, is the one nearest the middle of them.
- 13 postcodes without gigabit, outlined on the map. TS21 3AS, is the one nearest the middle of them.
- 11 postcodes without gigabit, outlined on the map. TS21 1HS, is the one nearest the middle of them.
What broadband can you get in TS21?
Ofcom reports on 529 of the 545 postcodes in TS21. At 170 of them every home and business can get gigabit broadband, and at 18 some cannot get decent broadband (10 Mbit/s).
Ofcom gives each postcode's share of homes and businesses, not how many there are, so these count postcodes. Each postcode page has its own figures. A provider's checker answers for one address.
Check one address on Ofcom's checkerSource: Ofcom Connected Nations, Connected Nations, Spring 2026, data for January 2026.
Is TS21 at risk of flooding?
15 of the 545 postcodes in TS21 have a home or business in an area at risk of flooding from rivers or the sea, the Environment Agency says. At those, it puts 12 homes and businesses in an area at high or medium risk.
High: 3.3% or more a year (1 in 30). Medium: 1% to 3.3% a year. Low: 0.1% to 1% a year. Very low: under 0.1% a year (1 in 1,000). Each band is the chance of flooding in any one year.
Homes and businesses in an area at risk of flooding from rivers or the sea, as the Environment Agency counts them, added up over the postcodes. It is for the land, not each building, and leaves out surface water, groundwater and sewers. Each postcode page has its own figures and its flood warning areas.
Source: Environment Agency flood risk, published 6 July 2026.
What do homes sell for in TS21?
Homes in TS21 sold for a typical £225,000 in the 12 months to September 2026, across 208 sales, up 12.5% on the 12 months before, HM Land Registry's figures show.
- Detached £295,000 95 sales
- Semi-detached £181,750 62 sales
- Terraced £147,000 42 sales
- Flat or maisonette £74,950 9 sales
Each bar is that kind's typical price, against the most expensive kind here.
Standard sales of homes at market value. A typical price is the median, the middle sale. Sales take weeks to be registered, so the last month or two are incomplete. Each postcode page gives the figure for its own postcode sector.
Source: HM Land Registry Price Paid Data, files dated 28 October 2026.
Postcodes in TS21
Pick a sector, then a postcode. A sector is the district plus the next digit.
UK postcode format explainedPlaces in TS21
Towns and villages with postcodes in TS21, and how many each has here.
Who covers TS21
How many of the district's postcodes in use fall under each council, constituency and police force area.
Councils
What council am I in?Constituencies
- Newton Aycliffe and Spennymoor303
- Stockton West193
- Stockton North49
Police force areas
- Durham337
- Cleveland208
Next to TS21
"Next to" is by number: the districts before and after TS21 in the TS area.
Check a postcode
Where the facts on this page come from
- Office for National Statistics: ONS Postcode Directory
- Ofcom Connected Nations
- Environment Agency flood risk
- 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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