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.

18,554 flats measured

Best £/sqft£/m² first

3 listings · £1.88/sqft£20.24/m² median in Blackfen

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.

Property photo
Floorplan

690 sqft 64 m²

£2.39/sqft £25.73/m² 27% above Blackfen median
£1,650/mo £825 each (if split by room) was £1,700

Upper Wickham Lane, Welling

2 bed 1 bath Belle Grove

15 days on market avail now Share Agent's site ↗
Property photo

size unknown

—/sqft/m²
£2,200/mo £733 each (if split by room) was £2,350

Selwyn Crescent, Welling, DA16

3 bed 1 bath Belle Grove

27 days on market avail now Share Portal ↗
Property photo

size unknown

—/sqft/m²
£2,150/mo £717 each (if split by room) was £2,300

Selwyn Crescent, Welling, DA16

3 bed 1 bath Belle Grove

27 days 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.