For developers and owners
How many flats could my building take?
A quick first indication for converting or extending a building into flats, based on the minimum flat sizes London requires. It's not a design or planning assessment: layout, light, stairs, fire safety and planning policy all affect the real number.
450 m² gross · about 338 m² inside flats
Roughly 3–6 flats
- All 1-bed, 2-person (min 50 m²)6
- All 2-bed, 4-person (min 70 m²)4
- All 3-bed, 5-person (min 86 m²)3
A mix usually lands between these. Planning policy often asks for family-sized homes too.
Guidance only, not a planning decision or professional advice. Your property needs checking individually. Terms
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