Loft conversion builders in the UK quote: Velux conversion £20,000–£35,000, dormer conversion £35,000–£60,000, hip-to-gable £45,000–£65,000, mansard £50,000–£70,000. Prices include structural work, insulation, staircase, and first fix. MyApproved contractors provide full planning and building regulations support as part of the project - not an add-on. Compare 3 detailed written quotes, free.

Loft conversions in the UK require building regulations approval (not just planning permission) covering: structural calculations, fire safety (30-minute fire doors, mains-wired smoke alarms), insulation (minimum U-value 0.18 W/m²K), and staircase specification. MyApproved loft conversion contractors are verified to submit building regulations applications on your behalf. Every contractor passes: government ID, £2M insurance, structural engineering evidence, and completed-project reference review.