How long does a loft conversion take? (UK 2026)
A rear dormer takes 6–8 weeks on site. Mansard 10–14 weeks. Add 2–4 months for design, planning and party wall awards before builders arrive.
A rear dormer takes 6–8 weeks on site. Mansard 10–14 weeks. Add 2–4 months for design, planning and party wall awards before builders arrive.