Flat 3 3 Belsize Avenue
NW3 4BL
- Flat
- 1 bedroom (estimate)
- 452 sq ft
- EPC D
What comparable sales show
Fair match£475,000
Range £394,000 to £556,000 · £1,051 per sq ft
Rank in NW3 4BL
52nd of 58
Postcode average £877,948
From completed sales of similar homes nearby, adjusted for floor area. It cannot see condition, layout or recent work, so it is not a valuation.
In short
Flat 3 3 Belsize Avenue is a 1 bedroom flat in NW3 of about 452 sq ft.
Comparable completed sales nearby put it at £394,000 to £556,000, about £475,000 in the middle.
That makes it the 52nd highest of the 58 homes we can compare in NW3 4BL, where the middle figure averages £877,948.
Across Camden, average prices fell 10.6% in the year to August 2026.
Where in the range would yours sell?
Condition and improvements usually decide it, and only someone who sees the home can say.
Lower end
£394,000
Middle
£475,000
Upper end
£556,000
Done work since the records were made? Claim your home and tell us, or ask local agents where yours sits.
Belsize Avenue at a glance
Completed sales on the road in the last two years
Sales
21
Average price
£768k
Average size
722 sq ft
Per sq ft
£925
Price range
£360k to £1.88m
Sale history
Every sale of this home registered with HM Land Registry since 1995
No sale of this home has been registered since 1995.
Homes in NW3 4BL
Ranked by what comparable sales show. Choose one to see its page.
- 25a Belsize AvenueFlat · 3 bed · 3,132 sq ftSold Sept 2009 for £940k£2,481,000#1
- Flat 1 21 Belsize AvenueFlat · 4 bed · 2,960 sq ftSold May 2022 for £3.85m£2,405,000#2
- Flat 1 27 Belsize AvenueFlat · 4 bed · 2,594 sq ft£2,236,000#3
- Flat 3 11 Belsize AvenueFlat · 5 bed · 2,217 sq ftSold Jun 2000 for £425k£2,051,000#4
- Flat 1 31 Belsize AvenueFlatSold Jun 2021 for £1.85m£1,771,000#5
- Flat 6 11 Belsize AvenueFlat · 3 bed · 1,518 sq ft£1,589,000#6
- Flat 2 31 Belsize AvenueFlat · 2 bed · 1,335 sq ftSold Apr 2024 for £1.20m£1,442,000#7
- 29a Belsize AvenueFlat · 3 bed · 1,324 sq ft£1,436,000#8
- 25b Belsize AvenueFlat · 2 bed · 1,259 sq ftSold May 2012 for £1.13m£1,204,000#9
- Flat 4 1 Belsize AvenueFlatSold Mar 2001 for £425k£1,200,000#10
- 23a Belsize AvenueFlat · 3 bed · 1,195 sq ftSold Mar 2012 for £930k£1,169,000#11
- First Floor Flat 29 Belsize AvenueFlat · 3 bed · 1,173 sq ftSold Feb 2021 for £1.32m£1,158,000#12
- 25c Belsize AvenueFlat · 3 bed · 1,130 sq ftSold Jan 2023 for £1.42m£1,085,000#13
- Basement Flat 3 Belsize AvenueFlatSold Jul 2013 for £850k£974,000#14
- First Floor Flat 9 Belsize AvenueFlatSold Feb 2005 for £425k£949,000#15
- 25d Belsize AvenueFlat · 2 bed · 1,087 sq ftSold Jul 2008 for £774k£895,000#16
- 9b Belsize AvenueTerracedSold Aug 2024 for £885k£872,000#17
- 9a Belsize AvenueFlat · 3 bed · 1,001 sq ft£855,000#18
- 23c Belsize AvenueFlat · 3 bed · 1,023 sq ft£852,000#19
- 23d Belsize AvenueFlat · 2 bed · 1,023 sq ft£852,000#20
- Flat 2 21 Belsize AvenueFlat · 2 bed · 1,012 sq ftSold Jul 2000 for £360k£847,000#21
- First Floor Flat 7 Belsize AvenueFlatSold Jun 2019 for £928k£832,000#22
- 23b Belsize AvenueFlat · 2 bed · 958 sq ftSold Mar 2021 for £1.12m£791,000#23
- 9c Belsize AvenueFlat · 2 bed · 947 sq ftSold Jul 2016 for £1.02m£786,000#24
- Flat 3 5 Belsize AvenueFlat · 2 bed · 840 sq ftSold Feb 2025 for £1.14m£764,000#25
- Flat 2 1 Belsize AvenueFlat · 2 bed · 872 sq ftSold Dec 2013 for £870k£762,000#26
- Flat 4 11 Belsize AvenueFlat · 2 bed · 829 sq ftSold Mar 2024 for £1.08m£759,000#27
- Flat 3 1 Belsize AvenueFlat · 2 bed · 807 sq ftSold Mar 2015 for £970k£748,000#28
- Flat 2 11 Belsize AvenueFlatSold Nov 2006 for £389k£732,000#29
- Flat 1 3 Belsize AvenueFlat · 2 bed · 753 sq ftSold Aug 2015 for £1.07m£731,000#30
- 9e Belsize AvenueFlat · 2 bed · 743 sq ftSold Aug 2019 for £700k£704,000#31
- 3b Belsize AvenueFlat · 1 bed · 678 sq ftSold Aug 2002 for £113k£690,000#32
- Flat 5 21 Belsize AvenueFlat · 2 bed · 678 sq ftSold Jan 2021 for £622k£690,000#33
- Flat 2 3 Belsize AvenueFlatSold Feb 1999 for £154k£683,000#34
- 23e Belsize AvenueFlat · 1 bed · 624 sq ft£633,000#35
- Flat 4 27 Belsize AvenueFlat · 1 bed · 624 sq ftSold Sept 2024 for £625k£633,000#36
- 3a Belsize AvenueFlat · 2 bed · 614 sq ft£627,000#37
- Flat 7 15 Belsize AvenueFlat · 1 bed · 614 sq ftSold Apr 2004 for £230k£627,000#38
- Flat 2 15, Belsize AvenueFlat · 1 bed · 592 sq ft£611,000#39
- Flat 3 15, Belsize AvenueFlat · 1 bed · 581 sq ftSold Nov 2009 for £265k£590,000#40
- Flat 4 21 Belsize AvenueFlatSold Jun 2000 for £200k£590,000#41
- Flat 1 15, Belsize AvenueFlat · 1 bed · 570 sq ft£584,000#42
- Flat 6 27 Belsize AvenueFlat · 2 bed · 570 sq ftSold May 1997 for £111k£584,000#43
- Flat 3 21 Belsize AvenueFlat · 1 bed · 549 sq ftSold Mar 2025 for £550k£550,000#44
- Flat 2 5 Belsize AvenueFlat · 1 bed · 538 sq ftSold Jun 2022 for £560k£544,000#45
- Flat 4 15, Belsize AvenueFlat · 1 bed · 538 sq ft£544,000#46
- Flat 4 3 Belsize AvenueFlat · 2 bed · 527 sq ftSold Dec 2003 for £278k£538,000#47
- Basement Flat 33 Belsize AvenueFlatSold Aug 1998 for £120k£525,000#48
- Flat 3 27 Belsize AvenueFlat · 1 bed · 495 sq ftSold Aug 2022 for £550k£520,000#49
- Flat 5 27 Belsize AvenueFlat · 1 bed · 484 sq ft£513,000#50
- Flat 7 5 Belsize AvenueFlat · 1 bed · 474 sq ftSold Jun 2021 for £535k£487,000#51
- Flat 3 3 Belsize Avenue (this home)Flat · 1 bed · 452 sq ft£475,000#52
- Flat 5 11 Belsize AvenueFlat · 1 bed · 452 sq ftSold Mar 2005 for £250k£475,000#53
- Flat 5 15, Belsize AvenueFlat · 1 bed · 452 sq ftSold Mar 2014 for £460k£475,000#54
- Flat 4 5 Belsize AvenueFlat · 1 bed · 441 sq ftSold Jun 2013 for £360k£466,000#55
- Flat 5 5 Belsize AvenueFlat · 1 bed · 431 sq ftSold Jul 2023 for £525k£462,000#56
- Flat 6 5 Belsize AvenueFlat · 1 bed · 420 sq ftSold Dec 2019 for £490k£456,000#57
- Flat 5 3 Belsize AvenueFlat · 1 bed · 366 sq ftSold Feb 1999 for £130k£417,000#58
- Flat 5 31 Belsize AvenueFlat · 1 bed · 172 sq ft–
- Flat 6 31 Belsize AvenueFlat · 205 sq ft–
The completed sales behind the figure
Similar homes nearby, registered with HM Land Registry. Choose one to see its page.
| Home | Price | Sold | Size | Per sq ft | Away |
|---|---|---|---|---|---|
| Flat 2, 22 Belsize AvenueNW3 4AU · Flat | £545,000 | Dec 2025 | 474 sq ft | £1,151 | < 0.1 mi |
| Flat 79, Gilling Court Belsize GroveNW3 4XD · Flat | £475,000 | Jun 2026 | 463 sq ft | £1,026 | 0.2 mi |
| Flat 11, 28 Belsize AvenueNW3 4AU · Flat | £360,000 | Oct 2025 | 484 sq ft | £743 | < 0.1 mi |
| 4 Howitt CloseNW3 4LX · Flat | £329,000 | Feb 2026 | 431 sq ft | £764 | 0.2 mi |
| Flat 3, 21 Belsize AvenueNW3 4BL · Flat | £550,000 | Mar 2025 | 549 sq ft | £1,002 | < 0.1 mi |
| Flat 26, Holmefield Court Belsize GroveNW3 4TT · Flat | £520,000 | Oct 2025 | 431 sq ft | £1,208 | 0.2 mi |
| 6 Mccrone MewsNW3 5BG · Flat | £585,000 | Jun 2025 | 409 sq ft | £1,430 | 0.1 mi |
| Flat 19, Belle Vue Apartments Rowland Hill StreetNW3 2AQ · Flat | £515,000 | Jul 2026 | 570 sq ft | £903 | 0.2 mi |
| Flat 5, 63 Belsize AvenueNW3 4BN · Flat | £725,000 | Mar 2026 | 614 sq ft | £1,182 | 0.1 mi |
| Flat 2, 47 Belsize AvenueNW3 4BN · Flat | £475,000 | Mar 2025 | 506 sq ft | £939 | 0.1 mi |
| Flat 3, Hillfield Court Belsize AvenueNW3 4BH · Flat | £420,000 | Mar 2025 | 495 sq ft | £848 | 0.2 mi |
| Flat 17, Hillfield Mansions Haverstock HillNW3 4QR · Flat | £491,000 | Mar 2025 | 484 sq ft | £1,014 | 0.2 mi |
What buyers have paid in NW3
Completed sales in the last 12 months, against the 12 months before
| Type | Sales | Average price | Average size | Per sq ft | On the year |
|---|---|---|---|---|---|
| All homes | 369 | £1,484,239 | 1,247 sq ft | £1,085 | −5.9% |
| Flats | 286 | £973,128 | 900 sq ft | £982 | −9.6% |
| Terraced | 40 | £2,257,067 | 1,786 sq ft | £1,335 | −14.7% |
| Semi-detached | 21 | £4,142,893 | 2,874 sq ft | £1,530 | +0.9% |
| Detached | 12 | £5,903,271 | 3,387 sq ft | £1,420 | +2.9% |
Contains HM Land Registry data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0.
Energy performance data © Crown copyright. Licensed under the Open Government Licence v3.0.
Floor area and energy rating from the energy certificate of May 2026.
Is this your home and you would rather it had no page here? Claim it with your email and mobile and hide it in one click, or contact us.