GaffFinder

London lettings, by the square foot

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Every London flat, measured.

The portals won’t let you rank by size. We read the floorplans, so you can.

18,513 flats measured

Best £/sqft£/m² first

14 listings · £4.83/sqft£51.99/m² median in Swiss Cottage

Sizes are estimates: an AI model reads most of them from the floorplan, and it can be wrong — so can the £/sqft£/m² worked out from them. Check with the agent before you rely on one.

837 sqft 78 m²

£3.58/sqft £38.53/m² 26% below Swiss Cottage median
£3,000/mo £1,500 each (if split by room) was £3,350 ◷ 49 days on market

Visage Apartments, Winchester Road, NW3

2 bed 2 bath Belsize Park

49 days on market avail 14 Oct Share Agent's site ↗

1,160 sqft 108 m²

£4.48/sqft £48.22/m² 7% below Swiss Cottage median
£5,200/mo £1,733 each (if split by room) was £5,750 ◷ relisted 2×

Fitzjohn's Avenue, Hampstead, London, NW3

3 bed 2 bath Belsize Park

12 days on market avail now Share Portal ↗

1,304 sqft 121 m²

£4.60/sqft £49.51/m² 5% below Swiss Cottage median
£6,000/mo £2,000 each (if split by room) was £6,900 ◷ 58 days on market

Wedderburn Road, Hampstead, NW3

3 bed 2 bath Belsize Park

58 days on market avail now Share Agent's site ↗

1,115 sqft 104 m²

£4.66/sqft £50.16/m² 4% below Swiss Cottage median
£5,200/mo £1,733 each (if split by room) was £5,633 ◷ relisted 1×

St. Johns Wood Park

3 bed 3 bath Belsize Park

4 days on market Share Agent's site ↗

1,044 sqft 97 m²

£4.98/sqft £53.60/m²
£5,200/mo £1,733 each (if split by room) was £5,997 ◷ relisted 3×

Fitzjohns Avenue, Hampstead

3 bed 2 bath Belsize Park

14 days on market avail now Share Agent's site ↗

1,062 sqft 99 m²

£5.30/sqft £57.05/m²
£5,633/mo £1,878 each (if split by room) ◷ relisted 1×

St. Johns Wood Park, St Johns Wood, London, NW8

3 bed 2 bath Belsize Park

14 days on market avail 30 Sep Share Agent's site ↗

338 sqft 31 m²

£5.32/sqft £57.26/m²
£1,798/mo was £2,058 ◷ 42 days on market

Magdalen Mews, Hampstead NW3

1 bed 1 bath Belsize Park

42 days on market avail 1 Nov Share Agent's site ↗

657 sqft 61 m²

£6.32/sqft £68.03/m² 31% above Swiss Cottage median
£4,150/mo ◷ relisted 2×

Winchester Road, Swiss Cottage, London, NW3

1 bed 1 bath Belsize Park

Also listed here £6,500 short let ↗

listed today Share Agent's site ↗

301 sqft 28 m²

£6.48/sqft £69.75/m² 34% above Swiss Cottage median
£1,950/mo ◷ relisted 5×

The Quarters,120 Finchley Road, London, NW3 5HT

0 bed 1 bath Belsize Park

Also listed here £4,250 short let ×2 ↗

3 days on market Share Agent's site ↗

327 sqft 30 m²

£7.03/sqft £75.67/m² 46% above Swiss Cottage median
£2,300/mo ◷ relisted 6×

120 Finchley Road, London, NW3 5JB

0 bed 1 bath Belsize Park

6 days on market avail now Share Portal ↗

312 sqft 29 m²

£7.37/sqft £79.33/m² 53% above Swiss Cottage median
£2,300/mo ◷ relisted 4×

The Quarters, 120 Finchley Road, London, NW3 5JB

0 bed 1 bath Belsize Park

Also listed here £2,100 short let ↗

6 days on market avail now Share Agent's site ↗

4,372 sqft 406 m²

£11.89/sqft £127.98/m² 146% above Swiss Cottage median
£52,000/mo £10,400 each (if split by room) ◷ 2mo on market

St Edmund's Terrace, Primrose Hill, London, NW8

5 bed 5 bath Belsize Park

2mo on market Share Agent's site ↗

size unknown

—/sqft/m²
£5,633/mo £1,878 each (if split by room) ◷ 58 days on market

Boydell Court, St Johns Wood, London NW8

3 bed 3 bath Belsize Park

58 days on market avail now Share Portal ↗

size unknown

—/sqft/m²
£5,993/mo £1,998 each (if split by room) was £6,899 ◷ relisted 2×

Wedderburn Road, Hampstead, NW3

3 bed 2 bath Belsize Park

Also listed here £6,478 ↗

4 days on market avail now Share Portal ↗

How we know the size

  1. 01

    We collect

    Every new flat to rent in London, checked through the day, seven days a week.

  2. 02

    We read the floorplan

    A vision model reads the plan the way you would — room by room, taking the dimensions printed on it. It is an AI estimate, and it can be wrong.

  3. 03

    We measure

    That gives a square footage, and a price per square foot. You can sort and filter on both. The portal offers neither.