TS21 postcode area guide — County Durham
House prices, crime, broadband speeds, mobile signal, schools and demographics for the TS21 postcode district in County Durham — every official dataset on one page.
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Where is TS21?
Broadband & internet speeds in TS21
Mixed coverage
Superfast (30Mb+)
72.2%
Ultrafast (300Mb+)
5.6%
Gigabit-capable
5.6%
Below USO (10Mb)
1%
Broadband availability in the TS21 postcode district (County Durham) is Mixed — superfast is available to many but not all premises. Across the 525 postcodes Ofcom measures in TS21, superfast broadband (30 Mbit/s or faster) reaches 72.2% of premises and gigabit-capable lines are available to 5.6%.
Around 1% of premises in TS21 fall below the Universal Service Obligation (a minimum of 10 Mbit/s download and 1 Mbit/s upload), so the overwhelming majority of homes and businesses here can already order a decent fixed line. For a business that depends on its connection, the figures that matter most are gigabit and full-fibre availability — the symmetric, low-contention services we quote leased lines and FTTP against.
Sample postcodes in TS21
| Postcode | Superfast | Gigabit |
|---|---|---|
| TS21 1AA | 100% | 0% |
| TS21 1AB | 100% | 33.3% |
| TS21 1AD | 0% | 0% |
| TS21 1AE | 0% | 0% |
| TS21 1AF | 100% | 0% |
| TS21 1AG | 0% | 0% |
| TS21 1AH | 0% | 0% |
| TS21 1AJ | 0% | 0% |
| TS21 1AN | 100% | 0% |
| TS21 1AR | 0% | 0% |
Run a speed test to see what you're actually getting, or check your exact postcode.
Mobile signal around County Durham
Ofcom's coverage model for the wider County Durham district (269,279 premises):
4G indoors — all networks
86.8%
4G outdoors — all networks
99.2%
5G outdoors — all networks
39.9%
Voice indoors — all networks
88.9%
Signal varies street by street — use the mobile coverage checker to compare EE, O2, Three and Vodafone at an exact postcode.
House prices in TS21
Based on 205 sales registered with HM Land Registry in the last 12 months, the median sold price in TS21 is £185,000, down 10.2% on the previous year (£205,995).
Detached
£310,000
71 sales
Semi-detached
£175,000
67 sales
Terraced
£135,000
56 sales
Flat / maisonette
£70,500
9 sales
Latest recorded sales in TS21
| Date | Price | Type | Street | Postcode |
|---|---|---|---|---|
| 15 May 2026 | £600,000 | Detached | Vicars Close | TS21 3LJ |
| 15 May 2026 | £180,000 | Terraced | Dent Road | TS21 1FX |
| 8 May 2026 | £260,000 | Detached | Carperby Close | TS21 1GG |
| 30 Apr 2026 | £250,000 | Semi-detached | Winterton Avenue | TS21 3NH |
| 24 Apr 2026 | £180,000 | Detached | Elderberry Mews | TS21 4EZ |
| 24 Apr 2026 | £110,000 | Semi-detached | The Gables | TS21 3EU |
| 23 Apr 2026 | £110,000 | Flat | Winterton Avenue | TS21 3NJ |
| 20 Apr 2026 | £120,000 | Semi-detached | Oakdene Road | TS21 4EQ |
| 15 Apr 2026 | £92,000 | Terraced | Cleveland View | TS21 4BZ |
| 15 Apr 2026 | £150,000 | Terraced | Cobby Castle Lane | TS21 1HD |
Contains HM Land Registry data © Crown copyright and database right 2026, licensed under the Open Government Licence v3.0.
Who lives here? County Durham demographics
Census 2021 figures for the wider County Durham district (522,068 residents, 234,764 households):
| Age profile | |
|---|---|
| Under 15 | 16.9% |
| 15–29 | 22.7% |
| 30–44 | 17.5% |
| 45–64 | 21.6% |
| 65+ | 21.3% |
| Housing tenure | |
|---|---|
| Owner-occupied | 62.5% |
| Private rented | 17.2% |
| Social rented | 10.6% |
Source: ONS Census 2021 (district level — the finest openly licensed cut we republish). © Crown copyright, OGL v3.0.
Schools in and around TS21
| School | Phase | Ages | Pupils | Postcode |
|---|---|---|---|---|
| Sedgefield Community College | Secondary | 11–16 | 982 | TS21 3DD |
| Sedgefield Hardwick Primary Academy | Primary | 2–11 | 256 | TS21 3DA |
| Sedgefield Primary School | Primary | 3–11 | 213 | TS21 2BJ |
| William Cassidi Church of England Aided Primary School | Primary | 3–11 | 179 | TS21 1JD |
| St Mary's Church of England Primary School | Primary | 2–11 | 111 | TS21 1DL |
| Fishburn Primary School | Primary | 2–11 | 111 | TS21 4AU |
| Bishopton Redmarshall CofE Primary School | Primary | 3–11 | 90 | TS21 1HD |
Source: DfE Get Information about Schools (England & Wales). Check Ofsted report cards for inspection detail — headline one-word grades were retired in 2024.
Food hygiene ratings in TS21
102 rated food businesses operate in TS21. 79 hold the top rating of 5, 11 are rated 4, and 2 are rated 2 or below.
Among the 5-rated: AFT DA Stephenson, Aubergine Cafe, Back of Beyond Books, Bishopton And Redmarshall CE Primary School, Bishopton Equestrian Cafe.
Source: Food Standards Agency, food hygiene ratings (FHRS) open data.
Energy performance (EPC) in TS21
From a sample of 48 Energy Performance Certificates across 9 TS21 postcodes, the most common rating is band D (average band D). 19% of sampled homes are rated C or better.
Band C
19%
Band D
44%
Band E
21%
Band F
13%
Band G
4%
Source: MHCLG Energy Performance of Buildings Data (England & Wales), sampled at postcode level and refreshed monthly. Individual certificates are on each postcode’s page.
Phone area codes for County Durham
Landlines around TS21 typically use:
Had a call from an unknown number? Use our free UK phone number checker to see who called.
What's it like living in TS21?
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Moving to TS21? Sort your connectivity first
We arrange broadband, full-fibre, leased lines, VoIP and business mobiles across County Durham — free, no-obligation quote.
Postcodes in TS21
Neighbouring districts
All Cleveland (TS) postcode districts ›
Frequently asked questions
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Sources: HM Land Registry Price Paid Data, police.uk street-level crime, Ofcom Connected Nations, ONS Census 2021, DfE Get Information about Schools, Food Standards Agency FHRS — all © Crown copyright, licensed under the Open Government Licence v3.0. Figures are area aggregates; individual addresses vary. Energy performance (EPC) data will be added when our Open Data Communities registration is approved.