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.

18,828 flats measured

Best £/sqft£/m² first

7 listings · £3.16/sqft£34.01/m² median in SE3

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.

3,906 sqft 363 m²

£1.41/sqft £15.18/m² short let
£5,500/mo

Foxes Dale, Blackheath Park, SE3

5 bed 4 bath Blackheath Cator Estate

11 days on market avail 9 Jan 2027 Share Agent's site ↗

1,458 sqft 135 m²

£1.89/sqft £20.34/m² 40% below SE3 median
£2,750/mo £688 each (if split by room)

Merriman Road, London, SE3

4 bed 2 bath Brook Hospital Estate

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

1,011 sqft 94 m²

£2.47/sqft £26.59/m² 22% below SE3 median
£2,500/mo £625 each (if split by room)

Weyman Road, Blackheath

4 bed 2 bath Brook Hospital Estate

3 days on market Share Agent's site ↗

1,531 sqft 142 m²

£4.25/sqft £45.75/m² short let
£6,500/mo ◷ 56 days on market

Westcombe Park Road, Blackheath, SE3

6 bed 3 bath Bernersmede

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

size unknown

—/sqft/m²
£3,500/mo £700 each (if split by room)

Harraden Road, London SE3

5 bed 3 bath Brook Hospital Estate

27 days on market avail 30 Oct Share Portal ↗

size unknown

—/sqft/m²
£3,600/mo £900 each (if split by room) ◷ 42 days on market

Kidbrooke Grove

4 bed 2 bath Bernersmede

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

size unknown

—/sqft/m²
£3,300/mo £825 each (if split by room) ◷ 60 days on market

Ottley Drive, London, SE3

4 bed 4 bath Blackheath Cator Estate

2mo on market avail now Share Agent's site ↗

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.