CB3 postcode area guide — Cambridge
House prices, crime, broadband speeds, mobile signal, schools and demographics for the CB3 postcode district in Cambridge — every official dataset on one page.
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Where is CB3?
Broadband & internet speeds in CB3
Excellent coverage
Superfast (30Mb+)
97.2%
Ultrafast (300Mb+)
86.7%
Gigabit-capable
86.1%
Below USO (10Mb)
0%
Broadband availability in the CB3 postcode district (Cambridge) is Excellent — gigabit-capable full fibre is widely available. Across the 379 postcodes Ofcom measures in CB3, superfast broadband (30 Mbit/s or faster) reaches 97.2% of premises and gigabit-capable lines are available to 86.1%.
Around 0% of premises in CB3 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 CB3
| Postcode | Superfast | Gigabit |
|---|---|---|
| CB3 0AA | 100% | 100% |
| CB3 0AD | 100% | 89.7% |
| CB3 0AE | 100% | 92.9% |
| CB3 0AF | 100% | 42.1% |
| CB3 0AG | 100% | 100% |
| CB3 0AH | 94.6% | 94.6% |
| CB3 0AJ | 100% | 100% |
| CB3 0AL | 100% | 100% |
| CB3 0AN | 100% | 100% |
| CB3 0AP | 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.
Crime in CB3
Police recorded 141 incidents within about a mile of the centre of CB3 in May 2026 (latest published street-level data). The breakdown:
| Category | Incidents | Share |
|---|---|---|
| Violence & sexual offences | 34 | 24.1% |
| Anti-social behaviour | 20 | 14.2% |
| Shoplifting | 18 | 12.8% |
| Vehicle crime | 12 | 8.5% |
| Criminal damage & arson | 11 | 7.8% |
| Other theft | 11 | 7.8% |
| Bicycle theft | 9 | 6.4% |
| Public order | 8 | 5.7% |
Raw counts favour busy town centres — a high street with shops and nightlife records more incidents than a residential cul-de-sac. Source: police.uk open data (point sample around the district centroid).
House prices in CB3
Based on 103 sales registered with HM Land Registry in the last 12 months, the median sold price in CB3 is £641,000, down 6.3% on the previous year (£683,996).
Detached
£792,500
38 sales
Semi-detached
£425,000
16 sales
Terraced
£750,000
27 sales
Flat / maisonette
£400,000
21 sales
Latest recorded sales in CB3
| Date | Price | Type | Street | Postcode |
|---|---|---|---|---|
| 14 May 2026 | £1,165,111 | Terraced | Owlstone Road | CB3 9JH |
| 1 May 2026 | £1,300,000 | Detached | Champneys Walk | CB3 9AW |
| 30 Apr 2026 | £680,000 | Semi-detached | Woodlands Park | CB3 0QB |
| 17 Apr 2026 | £830,000 | Detached | Thornton Close | CB3 0NF |
| 8 Apr 2026 | £1,372,000 | Detached | Barton Road | CB3 9LH |
| 31 Mar 2026 | £490,000 | Flat | Gough Way | CB3 9LR |
| 27 Mar 2026 | £375,000 | Semi-detached | St Johns Place | CB3 0AH |
| 24 Mar 2026 | £350,000 | Flat | Thornton Court | CB3 0NS |
| 20 Mar 2026 | £966,679 | Semi-detached | Eltisley Avenue | CB3 9JQ |
| 16 Mar 2026 | £700,000 | Flat | Grange Road | CB3 9AP |
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 CB3
| School | Phase | Ages | Pupils | Postcode |
|---|---|---|---|---|
| University of Cambridge Primary School | Primary | 4–11 | 660 | CB3 0QZ |
| King's College School | Not applicable | 4–14 | 381 | CB3 9DN |
| St John's College School | Not applicable | 4–13 | 376 | CB3 9AB |
| Newnham Croft Primary School | Primary | 4–11 | 221 | CB3 9JF |
| Girton Glebe Primary School | Primary | 5–11 | 189 | CB3 0PN |
| Gretton School | Not applicable | 5–19 | 172 | CB3 0RX |
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 CB3
127 rated food businesses operate in CB3. 89 hold the top rating of 5, 24 are rated 4, and none are currently rated 2 or below.
Among the 5-rated: Aramark, Arc Cafe, Arlington Manor Care Home, Aveva - TNS Catering, Barton Road Day Nursery (Pembroke and Queens College).
Source: Food Standards Agency, food hygiene ratings (FHRS) open data.
Energy performance (EPC) in CB3
From a sample of 81 Energy Performance Certificates across 8 CB3 postcodes, the most common rating is band C (average band D). 52% of sampled homes are rated C or better.
Band A
1%
Band B
4%
Band C
47%
Band D
33%
Band E
14%
Band F
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 CB3 typically use:
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What's it like living in CB3?
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Postcodes in CB3
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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.