CB21 postcode area guide — Cambridge
House prices, crime, broadband speeds, mobile signal, schools and demographics for the CB21 postcode district in Cambridge — every official dataset on one page.
Check any UK postcode
Where is CB21?
Broadband & internet speeds in CB21
Strong coverage
Superfast (30Mb+)
92.3%
Ultrafast (300Mb+)
44.8%
Gigabit-capable
44%
Below USO (10Mb)
0.3%
Broadband availability in the CB21 postcode district (Cambridge) is Strong — superfast is near-universal and gigabit is rolling out. Across the 425 postcodes Ofcom measures in CB21, superfast broadband (30 Mbit/s or faster) reaches 92.3% of premises and gigabit-capable lines are available to 44%.
Around 0.3% of premises in CB21 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 CB21
| Postcode | Superfast | Gigabit |
|---|---|---|
| CB21 4AA | 100% | 100% |
| CB21 4AB | 100% | 0% |
| CB21 4AD | 100% | 0% |
| CB21 4AE | 100% | 100% |
| CB21 4AF | 100% | 0% |
| CB21 4AG | 100% | 100% |
| CB21 4AH | 100% | 100% |
| CB21 4AL | 100% | 100% |
| CB21 4AN | 100% | 100% |
| CB21 4AP | 100% | 100% |
Run a speed test to see what you're actually getting, or check your exact postcode.
Mobile signal around Cambridge
Ofcom's coverage model for the wider Cambridge district (61,788 premises):
4G indoors — all networks
98.8%
4G outdoors — all networks
100%
5G outdoors — all networks
85.1%
Voice indoors — all networks
99.9%
Signal varies street by street — use the mobile coverage checker to compare EE, O2, Three and Vodafone at an exact postcode.
House prices in CB21
Based on 165 sales registered with HM Land Registry in the last 12 months, the median sold price in CB21 is £438,000, down 10.6% on the previous year (£490,000).
Detached
£570,000
64 sales
Semi-detached
£415,000
54 sales
Terraced
£338,000
37 sales
Flat / maisonette
£235,000
3 sales
Latest recorded sales in CB21
| Date | Price | Type | Street | Postcode |
|---|---|---|---|---|
| 20 May 2026 | £380,000 | Semi-detached | The Grove | CB21 4UH |
| 15 May 2026 | £488,500 | Semi-detached | Park Lane | CB21 4SS |
| 8 May 2026 | £490,000 | Detached | Weston Grove | CB21 5DY |
| 1 May 2026 | £355,000 | Detached | Bartons Close | CB21 4EA |
| 1 May 2026 | £480,000 | Terraced | Burton End | CB21 4SD |
| 30 Apr 2026 | £875,000 | Detached | Hadstock Road | CB21 4NT |
| 29 Apr 2026 | £550,000 | Semi-detached | Rivey Way | CB21 4LH |
| 23 Apr 2026 | £735,000 | Detached | The Grip | CB21 4NR |
| 21 Apr 2026 | £458,500 | Semi-detached | The Rookery | CB21 4EU |
| 17 Apr 2026 | £375,000 | Semi-detached | Claydon Close | CB21 4TD |
Contains HM Land Registry data © Crown copyright and database right 2026, licensed under the Open Government Licence v3.0.
Who lives here? Cambridge demographics
Census 2021 figures for the wider Cambridge district (145,674 residents, 52,474 households):
| Age profile | |
|---|---|
| Under 15 | 14.4% |
| 15–29 | 41.5% |
| 30–44 | 19% |
| 45–64 | 13.8% |
| 65+ | 11.4% |
| Housing tenure | |
|---|---|
| Owner-occupied | 44.1% |
| Private rented | 31.6% |
| Social rented | 9.5% |
Source: ONS Census 2021 (district level — the finest openly licensed cut we republish). © Crown copyright, OGL v3.0.
Schools in and around CB21
| School | Phase | Ages | Pupils | Postcode |
|---|---|---|---|---|
| Linton Village College | Secondary | 11–16 | 766 | CB21 4JB |
| Fulbourn Primary School | Primary | 4–11 | 254 | CB21 5BH |
| Linton Heights Junior School | Primary | 7–11 | 231 | CB21 4XB |
| Meadow Primary School | Primary | 3–11 | 211 | CB21 4DJ |
| Granta School | Not applicable | 2–19 | 185 | CB21 4NN |
| Linton CofE Infant School | Primary | 5–7 | 153 | CB21 4JX |
| Great Abington Primary School | Primary | 4–11 | 133 | CB21 6AE |
| Castle Camps Church of England (Controlled) Primary School | Primary | 3–11 | 125 | CB21 4TH |
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 CB21
94 rated food businesses operate in CB21. 85 hold the top rating of 5, 8 are rated 4, and none are currently rated 2 or below.
Among the 5-rated: Abington Annexe Community Childcare, Abington Social Club, Abington Stores and Post Office, abm Catering @ Fulbourn Primary School, Acorn Garage.
Source: Food Standards Agency, food hygiene ratings (FHRS) open data.
Energy performance (EPC) in CB21
From a sample of 145 Energy Performance Certificates across 11 CB21 postcodes, the most common rating is band D (average band D). 30% of sampled homes are rated C or better.
Band A
2%
Band B
8%
Band C
20%
Band D
47%
Band E
20%
Band F
3%
Band G
1%
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 Cambridge
Landlines around CB21 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 CB21?
Be the first to rate CB21 (Cambridge).
How would you rate living in CB21 (Cambridge)?
Moving to CB21? Sort your connectivity first
We arrange broadband, full-fibre, leased lines, VoIP and business mobiles across Cambridge — free, no-obligation quote.
Postcodes in CB21
Neighbouring districts
All Cambridge (CB) postcode districts ›
Frequently asked questions
Where is the CB21 postcode?
How much do houses cost in CB21?
What broadband can I get in CB21?
Who lives in CB21?
How energy efficient are homes in CB21?
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.