Flat 1 51 Belsize Avenue
NW3 4BN
- Flat
- Leasehold
- 3 bedrooms (estimate)
- 1,012 sq ft
- EPC C
What comparable sales show
Few close matches: a rough guide£863,000
Range £656,000 to £1,071,000 · £853 per sq ft
Since last sale
−£772,000
−47.2% since Aug 2014, −5.1% a year
Rank in NW3 4BN
16th of 35
Postcode average £1,130,657
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 1 51 Belsize Avenue is a 3 bedroom leasehold flat in NW3 of about 1,012 sq ft.
Comparable completed sales nearby put it at £656,000 to £1,071,000, about £863,000 in the middle.
That makes it the 16th highest of the 35 homes we can compare in NW3 4BN, where the middle figure averages £1,130,657.
It last sold for £1,635,000 in August 2014; comparable sales suggest it has lost about £772,000 since, roughly −5.1% a year.
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
£656,000
Middle
£863,000
Upper end
£1,071,000
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
| Sold | Price paid | Change | A year |
|---|---|---|---|
| August 2014 | £1,635,000 | +465.7% | +10.4% |
| February 1997 | £289,000 | First sale | – |
Homes in NW3 4BN
Ranked by what comparable sales show. Choose one to see its page.
- 61 Belsize AvenueSemi-detachedSold Dec 2008 for £4.35m£9,836,000#1
- Flat 1, The Porticos, 53 - 59 Belsize AvenueFlatSold Oct 2024 for £1.88m£1,737,000#2
- 35b - 35e Belsize AvenueFlatSold May 2018 for £1.75m£1,633,000#3
- 63 Belsize AvenueFlatSold Nov 2007 for £1.02m£1,590,000#4
- Entrance Floor Flat 49 Belsize AvenueFlatSold Dec 2006 for £760k£1,359,000#5
- Flat 3, 63 Belsize AvenueFlatSold Aug 2001 for £464k£1,245,000#6
- Flat 2 51 Belsize AvenueFlatSold Jul 2014 for £1.25m£1,244,000#7
- 35a Belsize AvenueFlatSold Jun 2017 for £1.30m£1,200,000#8
- Flat 5 45 Belsize AvenueFlatSold May 2007 for £675k£1,175,000#9
- Flat 1 63 Belsize AvenueFlatSold Jun 1997 for £225k£1,169,000#10
- Flat 5 51 Belsize AvenueFlatSold Nov 2013 for £925k£1,094,000#11
- Flat 6 63 Belsize AvenueFlatSold Sept 1997 for £205k£1,043,000#12
- Basement Flat 49 Belsize AvenueFlatSold Jul 2005 for £520k£1,042,000#13
- 39b Belsize AvenueFlatSold Jun 2021 for £1.00m£957,000#14
- 35G Belsize AvenueFlatSold May 2025 for £948k£871,000#15
- Flat 1 51 Belsize Avenue (this home)Flat · 3 bed · 1,012 sq ftSold Aug 2014 for £1.64m£863,000#16
- 49a Belsize AvenueFlatSold Jan 2007 for £487k£861,000#17
- 35c Belsize AvenueFlatSold Jul 2018 for £830k£776,000#18
- 35d Belsize AvenueFlatSold Aug 2007 for £495k£776,000#19
- 35e Belsize AvenueFlatSold May 2015 for £724k£759,000#20
- 49B Belsize AvenueFlat · 2 bed · 775 sq ftSold Mar 2025 for £877k£713,000#21
- Flat 3 51 Belsize AvenueFlatSold May 2017 for £680k£649,000#22
- 35f Belsize AvenueFlatSold Nov 2015 for £669k£641,000#23
- Flat 5, 63 Belsize AvenueFlat · 1 bed · 614 sq ftSold Mar 2026 for £725k£627,000#24
- Flat 4, 51 Belsize Avenue LondonFlatSold Jul 2016 for £590k£611,000#25
- Flat 3 47, Belsize AvenueFlatSold Sept 2009 for £369k£601,000#26
- Flat 4 63 Belsize Avenue LondonFlatSold Dec 2009 for £338k£586,000#27
- Flat 3, 49 Belsize AvenueFlat · 1 bed · 538 sq ftSold Feb 2025 for £580k£571,000#28
- Flat 4 47, Belsize AvenueFlatSold May 2018 for £592k£552,000#29
- Flat 6 47, Belsize AvenueFlatSold Sept 2021 for £578k£523,000#30
- Flat 2, 47 Belsize AvenueFlat · 1 bed · 506 sq ftSold Mar 2025 for £475k£503,000#31
- Flat 5 47 Belsize AvenueFlatSold Nov 2010 for £340k£498,000#32
- Flat 1 47, Belsize AvenueFlatSold Jun 2011 for £313k£447,000#33
- Flat 2 41-43, Belsize AvenueFlatSold Jun 2014 for £425k£433,000#34
- Flat 2 49 Belsize AvenueFlatSold Nov 2018 for £400k£388,000#35
- 3 The Porticos 53-59 Belsize Avenue–
- 10 The Porticos 53-59 Belsize Avenue–
- 35b Belsize Avenue–
- 39c Belsize Avenue–
- 45a Belsize Avenue–
- Flat 1 37 Belsize Avenue–
- Flat 1 41-43 Belsize Avenue–
- Flat 1 49 Belsize Avenue–
- Flat 2 37 Belsize Avenue–
- Flat 2 The Porticos 57-59 Belsize Avenue–
- Flat 2nd And 3rd Floor Front 45 Belsize Avenue–
- Flat 3 37 Belsize Avenue–
- Flat 3 41-43 Belsize Avenue London–
- Flat 3 57 Belsize Avenue–
- Flat 3a The Porticos 53-55 Belsize Avenue–
- Flat 4 37 Belsize Avenue–
- Flat 4 41-43, Belsize Avenue–
- Flat 4 49 Belsize Avenue London–
- Flat 5 37 Belsize Avenue–
- Flat 5 41-43, Belsize Avenue–
- Flat 5 49 Belsize Avenue–
- Flat 5 The Porticos 53-59 Belsize Avenue–
- Flat 6 37 Belsize Avenue–
- Flat 6 49 Belsize Avenue–
- Flat 6 The Porticos 57 - 59 Belsize Avenue–
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 7, 27 Belsize AvenueNW3 4BL · Flat | £700,000 | Apr 2026 | 1,076 sq ft | £650 | 0.1 mi |
| Flat 5, 26 Glenloch RoadNW3 4DN · Flat | £550,000 | Apr 2026 | 936 sq ft | £587 | 0.1 mi |
| Flat 26, 15 Belsize AvenueNW3 4BL · Flat | £780,000 | Nov 2025 | 1,012 sq ft | £771 | 0.1 mi |
| Flat 27, Hillfield Court Belsize AvenueNW3 4BJ · Flat | £575,000 | Dec 2025 | 893 sq ft | £644 | 0.1 mi |
| Flat 5, Belle Vue Apartments Rowland Hill StreetNW3 2AQ · Flat | £1,000,000 | Sept 2025 | 958 sq ft | £1,044 | 0.1 mi |
| Flat 51, Belle Vue Apartments Rowland Hill StreetNW3 2AQ · Flat | £904,309 | Jun 2025 | 1,001 sq ft | £903 | 0.1 mi |
| Flat 70, Hillfield Court Belsize AvenueNW3 4BG · Flat | £725,000 | Nov 2025 | 818 sq ft | £886 | 0.1 mi |
| 49B Belsize AvenueNW3 4BN · Flat | £877,000 | Mar 2025 | 775 sq ft | £1,132 | < 0.1 mi |
| Flat 4, 28 Belsize Park GardensNW3 4LH · Flat | £1,150,000 | Jun 2025 | 990 sq ft | £1,161 | 0.2 mi |
| 76 Belsize LaneNW3 5BJ · Flat | £1,050,000 | Aug 2025 | 1,066 sq ft | £985 | 0.2 mi |
| Flat 5, 63 Belsize AvenueNW3 4BN · Flat | £725,000 | Mar 2026 | 614 sq ft | £1,182 | < 0.1 mi |
| Flat 50, Hillfield Court Belsize AvenueNW3 4BG · Flat | £1,175,000 | Aug 2025 | 1,206 sq ft | £975 | 0.1 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 | 363 | £1,487,820 | 1,248 sq ft | £1,084 | −5.2% |
| Flats | 281 | £968,039 | 896 sq ft | £979 | −10.3% |
| Terraced | 40 | £2,257,067 | 1,786 sq ft | £1,335 | −15.3% |
| 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 | −1.6% |
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 August 2024.
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