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CB21

UK postcode district

Part of Cambridge

Updated September 2026

District overview

Postcode units
534
Current units
446
Coordinate coverage
100%
Electoral wards
7

Coverage context

Countries represented
England
English regions represented
East of England
Local authority codes
3
Terminated postcode units
88

Postcode sectors in CB21

Choose a sector to browse its complete postcode-unit directory.

3 sectors
7,406 recorded sales at this postcode
Address Date Price
43, The Rookery, Balsham, Cambridge, CB21 4EU 29 July 2026 £410,000
84, High Street, Linton, Cambridge, CB21 4JT 29 July 2026 £580,000
36, Farmers Row, Fulbourn, Cambridge, CB21 5HL 3 July 2026 £340,000

Schools

Across this district

View schools report
Open schools
12
Primary
7
Secondary
1

Recorded crime

Across this district

View crime report
Published events
447
Months covered
12
Latest month
June 2026

Most recorded categories in this period

  • Violence and sexual offences 174
  • Criminal damage and arson 51
  • Anti social behaviour 49
  • Drugs 34
  • Burglary 34

Census 2021

Population and age profile

CB21 usual residents
15,880
Age-profile population
16,048

Age bands in CB21

Postcode district
Age 0 to 14
16.8%
2,691 residents
Age 15 to 24
9%
1,450 residents
Age 25 to 44
20.8%
3,337 residents
Age 45 to 64
28.7%
4,604 residents
Age 65 and over
24.7%
3,966 residents

Small counts are adjusted for privacy, so totals can differ slightly between Census tables.

Census Day: 21 March 2021. Sources: ONS/Nomis P001-P004 and ONS CT21_0228. Age table version 2024-04-08.

Fixed broadband coverage

The median Ofcom availability percentage across 435 current postcode units in this district. Each postcode is weighted equally, not by premises.

Superfast, 30 Mbit/s+
100%
Ultrafast, 100 Mbit/s+
93.3%
Ultrafast, 300 Mbit/s+
91.7%
Gigabit-capable
91.7%
Unable to receive decent fixed or FWA broadband
0%
Next Generation Access
100%
Decent broadband available from fixed wireless
0%

In this district, 372 postcode units had 100% superfast coverage, 196 postcode units had 100% gigabit-capable coverage, 6 postcode units had at least some premises without decent fixed or fixed-wireless access.

Predicted coverage, not measured speeds. Check availability for your address with a provider. Postcode-level full-fibre figures are not published in this release.

Source: Ofcom Connected Nations, coverage at January 2026, version 2026-01-v2. Contains Ofcom data licensed under the Open Government Licence v3.0.

Evidence in context

Property market

The five-year median is £465,726 from 1,126 recorded sales in CB21. This is a recorded-sale statistic, not a current valuation.

The latest UK House Price Index average for South Cambridgeshire is £436,011 in June 2026, up 4.9% year on year.

Schools

12 open schools are in scope, including 7 primary and 1 secondary schools.

Counts describe active establishment records. They do not assess admissions, catchments or quality.

Recorded crime

447 published events cover 12 months, averaging 37 events per published month. The largest recorded category is Violence and sexual offences with 174 events.

The source publishes anonymised street-level events. These figures are not a measure of safety for an individual address.