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4 bed flat for sale Fitzjohn's Avenue, Hampstead, NW3

Asking price

£2,500,000

Added on 10/10/2026

Type: Flat
Bedrooms: 4
Bathrooms: 3
Size: £1,051 per sq ft
Tenure: Ask agent

About this property

A rare NW3 landmark, this four bedroom, three bathroom duplex penthouse crowns a restored WWII watch tower, offering private ownership of the original turret itself. Spanning the top two floors, it combines remarkable heritage with refined contemporary design, panoramic skyline views and exceptional ceiling heights.

Once the tallest point in London and later requisitioned by the RAF as a wartime lookout, the building has evolved into an exclusive residential address. The penthouse stands as its crowning jewel, where original architectural character meets meticulous modern craftsmanship.

Floorplan

Council tax

Ask agent

Per year

Band A

£1,472
Band B

£1,717
Band C

£1,962
Band D

£2,208
Band E

£2,698
Band F

£3,189
Band G

£3,679
Band H

£4,415

The agent hasn't said which band this home is in; you can look it up on GOV.UK. In Camden, 2026/27 bills run from £1,472 a year in band A to £4,415 in band H.

Figures from MHCLG (Open Government Licence v3): the average bill for each band across Camden, including the typical parish precept, so a parish's own bill can differ a little. Discounts lower the bill, such as 25% off for an adult living alone.

Property timeline

Listed

October 2026 £2,500,000

4 beds · 3 baths · this listing

Past sales can't be shown: the agent hasn't given the flat number.

Price guide

100 comparables · within 2.4 miles

Priced above 67% of the 4-bed flats for sale nearby right now.

This home, £2,500,000 Median £1,500,000 · £697,500 – £3,950,000

Per square foot

£1,051 14% over

4-bed flats nearby £919

Against sold prices

4% under

NW3 sold median £1,093 / sq ft, 1,034 sales

Compared with 100 4-bed flats for sale within 2.4 miles, on the market now or already under offer. The range is the middle 80% of their asking prices. Sold prices are HM Land Registry sales in NW3 over the last 24 months, per square foot of EPC floor area. All sold £/sq ft in NW3 →

Location

Fitzjohn's Avenue, Hampstead, NW3

Open map Street View

Mortgage and stamp duty

Property price £2,500,000

£1.3m £3.8m

Deposit10% £250,000

£0 £2.5m

Interest rate 4.5%

0.5% 15%

Repayment period 25 years

5 years 40 years

A £2,250,000 mortgage. Most lenders would want a household income of about £500,000 to support it.

A guide only, for a capital repayment mortgage. The rate you are offered and what you can borrow depend on your circumstances and a full application with a lender or broker. Your home may be repossessed if you do not keep up repayments on your mortgage.

Properties sold nearby

HM Land Registry sales nearby. Floor areas from Energy Performance Certificates where matched.

Address	Type	Sold	Size	Size	£/sq ft	Price
Penthouse Flat, 53, Fitzjohns Avenue Flat / maisonette	Flat / maisonette	Nov 2025	2,325 sq ft £1,161/sq ft	2,325 sq ft	£1,161	£2,700,000
Flat 6, 55, Fitzjohns Avenue Flat / maisonette	Flat / maisonette	Aug 2023	n/a	n/a	n/a	£1,160,000
Flat 3, 55, Fitzjohns Avenue Flat / maisonette	Flat / maisonette	Feb 2022	527 sq ft £1,176/sq ft	527 sq ft	£1,176	£620,000
Flat 7, 55, Fitzjohns Avenue Flat / maisonette	Flat / maisonette	Jun 2021	678 sq ft £1,261/sq ft	678 sq ft	£1,261	£855,000
Flat 8, 55, Fitzjohns Avenue Flat / maisonette	Flat / maisonette	Nov 2019	581 sq ft £1,135/sq ft	581 sq ft	£1,135	£660,000
Flat 5, 55, Fitzjohns Avenue Flat / maisonette	Flat / maisonette	Jul 2017	614 sq ft £895/sq ft	614 sq ft	£895	£549,000
Flat 1, 55, Fitzjohns Avenue Flat / maisonette	Flat / maisonette	Jun 2013	1,313 sq ft £754/sq ft	1,313 sq ft	£754	£990,000
Flat 1, 55, Fitzjohns Avenue Flat / maisonette	Flat / maisonette	Aug 2011	1,313 sq ft £609/sq ft	1,313 sq ft	£609	£800,000