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Loft Conversion Costs in Wilmslow

Published: 15 January 2025 · Last updated: 25 May 2026

A comprehensive loft conversion cost guide.

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At a Glance

Typical cost range: £20,000 to £85,000
Typical timeline: 6 to 16 weeks
Planning permission: Usually permitted development; planning often needed for full mansard
Last updated: 25 May 2026
Free site survey: Yes

Call 0161 218 9616 for a free survey.

Type	Average Cost	Timeline	Planning Required
Velux only (no dormer)	£20,000 to £35,000	6 to 10 weeks	Permitted development
Rear dormer conversion	£35,000 to £55,000	8 to 12 weeks	Usually permitted development
Hip-to-gable + dormer	£45,000 to £70,000	10 to 14 weeks	Often permitted development
L-shaped dormer (full mansard)	£55,000 to £85,000	12 to 16 weeks	Planning often required