Property profile

Flat 21 Belsize Avenue

Map showing Flat 2, 1 Belsize Avenue, London

Property Price
150k200k250k300k400k500k750k1.5M

Estimated sale price

£930,000

Flats sold in Belsize

The box shows the middle 50% of flats sale prices, the whiskers show the 5th to 95th percentile, and the marker shows this property's estimated price.

Half of similar homes sold within the box; most sold within the wider line.

An indicative model estimate, not a survey or formal valuation.

This property vs market

Last sold20 Dec 2013
£870,000Change since last sale: +£62,000 (+7.1%)
Annualised change
+0.5% per yearCamden annualised change (flats) since 2013: +1.4% per yearThis property's value grew slower than the market
Price per sq ftLocal median £1,047 per sq ft
£1,069 per sq ftEstimate vs local median: +£22 per sq ft (+2.1%)
Local sold pricesMedian for flats in Belsize
£835,000Estimate vs local median: +£97,000 (+12%)
How this estimate is calculated

Area360's automated valuation uses available property details, recorded sales and local market data to estimate a sale price. This automated estimate is a guide, not a survey, mortgage valuation or formal valuation. See the valuation methodology and limitations.

Estimate calculated .

Property facts

Property typeFlat / Semi-Detached
TenureLeasehold
Construction period1900-1929
Floor area81 m² / 872 sq ft
Rooms3 habitable / 3 heated
Floor level1
EPC ratingC
EPC inspection03 Mar 2025

Sales history

DatePriceChange
20 Dec 2013£870,000+248%
02 Aug 2000£250,000-

Local market

Property prices in Belsize

Median price£885,000
Price per sq ft£1,087
Sales (last 12 months)107
Typical range (middle 50%)£678K – £1.5M

Based on 107 recent sales, the median property price is £885,000 (about £1,087 per square foot) in Belsize area, with individual transactions ranging from £265,000 up to £8,500,000.

Prices by property typelast 12 months

Median sale price, median price per square foot, sales count, and percentile information for each property type in Belsize over the last year.
TypeSalesMedian£/sq ft
Detached2£6,862,500£1,357
Semi-Detached4£2,696,375£1,559
Terraced6£2,590,000£1,290
Flats95£835,000£1,047

10-year price trendmedian sale price in Belsize

Sale price

Ten year median sale price trend for each property type in Belsize.
YearDetachedFlatsSemi-DetachedTerraced
2016£4,578,750£955,555£5,180,000£7,200,000
2017£3,950,000£955,000£4,575,000£3,300,000
2018£3,300,000£970,000£3,600,000£1,625,000
2019£4,085,000£945,000£2,780,000£1,706,250
2020£5,750,000£860,000£2,860,000£2,850,000
2021£880,000£5,475,000£2,925,000
2022£9,080,000£885,000£5,325,000£2,742,500
2023£7,100,175£977,500£3,000,000£2,600,000
2024£7,850,000£992,500£3,275,000£1,553,000
2025£6,116,373£870,000£4,850,000£2,430,000
2026£757,500£2,696,375£3,253,000
Ten year median sale price trend for each property type in Belsize.

Price per sq ft

Ten year median sale price per square foot trend for each property type in Belsize.
YearDetachedFlatsSemi-DetachedTerraced
2016£1,436£1,136£2,168
2017£1,537£1,089£1,466£1,149
2018£1,574£1,052£1,254£1,294
2019£1,463£1,068£1,054£1,162
2020£1,726£1,036£1,338£1,249
2021£1,075£1,505£1,169
2022£1,651£1,102£1,703£1,286
2023£2,100£1,128£1,284£1,342
2024£1,869£1,072£1,608£1,219
2025£1,565£1,089£1,598£1,317
2026£987£1,404£1,204
Ten year median sale price per square foot trend for each property type in Belsize.

Price distribution by property typelast 12 months

Price distribution by property type for Belsize in the last year.

Recent sales

There were 50+ recent sold properties in the last 18 months near NW3 4BL.

Recent sold properties in the last 18 months near NW3 4BL
DateAddressTypeTenurePriceMap
17 Apr 2026Flat 7, 27, Belsize Avenue, London, NW3 4BLFlatsLeasehold£700,000
14 Nov 2025Flat 26, 15, Belsize Avenue, London, NW3 4BLFlatsLeasehold£780,000
19 Mar 2025Flat 3, 21, Belsize Avenue, London, NW3 4BLFlatsLeasehold£550,000
10 Jun 2025Apartment 5, 21, Belsize Lane, London, NW3 5ASFlatsLeasehold£2,500,000
17 Apr 20267, Belsize Mews, London, NW3 5ATSemi-DetachedFreehold£1,842,750

Other properties at this postcode

AddressTenureFloor areaLast sale
3A, Belsize Avenue, London-57 m²-
3B, Belsize Avenue, LondonLeasehold63 m²£113,000 (2002)
9A, Belsize Avenue, London-93 m²-
23A, Belsize Avenue, LondonLeasehold111 m²£930,000 (2012)
23B Belsize Avenue, LondonLeasehold100 m²£1,123,296 (2021)
23C Belsize Avenue, London-104 m²-
23D Belsize Avenue, London-89 m²-
25A, Belsize Avenue, LondonLeasehold291 m²£940,000 (2009)
25B, Belsize Avenue, LondonLeasehold106 m²£1,125,000 (2012)
29A Belsize Avenue, LondonLeasehold123 m²£1,465,000 (2019)

Area insights for NW3 4BL

Full area profile →

Overview

Postcode NW3 4BL is located in a major urban area, within the Belsize ward of Camden in the London region, and forms part of the Belsize Park area. It has very low deprivation and high crime levels, with around 80.8 crimes per 1,000 residents per year, about 38% below the London average of 130 per 1,000. The average income per household in Belsize Park is £85,587 per year. The nearest station is Belsize Park, about 0.3 miles away. There are 3 primary and no secondary schools in the area. There are 2 parks nearby, the closest small park is Swiss Cottage Open Space.

Crime rate
7/10
Crimes per 1k residents
81
Deprivation level
2/10
Income level
8/10
Social housing
13.1%
Connectivity
6/10
Flood Risk
No risk
Noise Level
No noise

Deprivation level

2/10

Belsize Park has a very low level of deprivation, ranked at position 27,844 out of 32,844 areas in the United Kingdom, placing it within the bottom 15% least deprived areas in England.

Crime level

7/10

Belsize Park has a high crime rate, with approximately 80.8 reported incidents per 1,000 population each year.

Social housing

13.1%

Approximately 13.1% of homes on this street are social housing provided by a local council or housing association. Across the surrounding area, around 10.2% of dwellings are socially rented.

Income level

8/10

The average income per household in Belsize Park is £85,587 per year.

Noise Level

No noise

No significant noise sources from railways or roads near NW3 4BL.

Flood risk

No risk

Belsize Park near NW3 4BL has no flood risk (less than 0.1% chance of a flood each year) from rivers and sea.

Transport

6/10

The nearest station is Belsize Park located about 0.3 miles away. There are 5 stations nearby.

Nearby public transport stations for NW3 4BL
DistanceZoneNameLinesDirections
0.3 mi

2

Belsize Park

Northern

Walking directions to Belsize Park
0.4 mi

3

Hampstead Heath

Overground

Walking directions to Hampstead Heath
0.5 mi

2

Finchley Road

Jubilee, Metropolitan

Walking directions to Finchley Road

Parks

Nearby parks and green spaces for NW3 4BL
DistanceNameSizeDirections
0.4 miSwiss Cottage Open SpaceSmallWalking directions to Swiss Cottage Open Space
0.3 miHampstead GreenSmallWalking directions to Hampstead Green

Area Profile

Population
266
Population density
16,835.4 per km²

Crime

Crime per 1,000 population

Anti-social behaviour
49.16(+83%)
Violence and sexual offences
17.51(-44%)
Burglary
11.45(+109%)
Vehicle crime
11.45(+22%)
Other theft
8.75(-23%)
London average

Demographics

Ethnic groups

British
116
43.94%
Other White
87
32.95%
Other
19
7.2%
Other Asian
13
4.92%
African
8
3.03%
Total population: 264

Economics

Education (age 16+)

Level 4+ (Degree)
152
66.38%
Level 3 (A level)
25
10.92%
No qualifications
24
10.48%
Level 2 (GCSEs 9-4)
14
6.11%
Other
7
3.06%
Total 16+ residents: 229

Housing

Housing tenure

Private landlord or letting agency
66
48.18%
Owns with a mortgage
26
18.98%
Owns outright
23
16.79%
Social rents from council
17
12.41%
Other forms of private rent
4
2.92%
Total households: 137

Schools

In the NW3 4BL postcode area, located within Belsize Park, there are 3 primary and 0 secondary schools in close proximity.

Nearby primary and secondary schools for NW3 4BL
DistancePhaseNameTypeRating
0.1 miNot applicableSt Christopher's SchoolOther independent school

N/A

0.2 miNot applicableGloucester House, The Tavistock Children's Day UnitOther independent special school

Good

0.2 miNot applicableMaria Montessori SchoolOther independent school

Good

Local amenities

15 nearby supermarkets & convenience stores within mi of NW3 4BL

Nearby supermarkets & convenience stores for NW3 4BL
DistanceNameAddressDirections
0.1 miThe Late Late Store60 Belsize Lane, London, NW3 5ARWalking directions to The Late Late Store
0.2 miKavanagh's199-205 Haverstock Hill, London, NW3 4QGWalking directions to Kavanagh's
0.2 miNisa LocalHaverstock Hill, Camden, NW3 4QLWalking directions to Nisa Local
0.2 mipomonaCamden, NW3 4QSWalking directions to pomona
0.2 miLondis165 Haverstock Hill, London, NW3 4QTWalking directions to Londis