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Planning FAQ

Do I need planning permission for a loft conversion?

Usually no — most loft conversions qualify as Permitted Development if under 40m³ (terraced) or 50m³ (semi-detached), with 20cm eaves setback and matching materials. Flats, listed buildings, and conservation areas need full planning.

Architectural technologist reviewing planning drawings — planning drawings in London
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Tell us about your project

MCIAT chartered drawings for planning, building regs, lofts and extensions — fixed fees 30% below typical London architects. Tell us what you need and we’ll reply the same working day.

  • MCIAT chartered
  • Same working-day reply
  • Fixed fees from £840

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Speak to a chartered technologist — free 15 minutes

Pick a slot that suits you. No obligation and no sales pressure — just straight answers on your planning route, fixed fee and timescale.