Hip-to-Gable Loft Conversion Cost UK 2026

A hip-to-gable conversion changes a hipped roof end into a vertical gable, typically combined with a rear dormer for maximum space. It's the go-to upgrade for semi-detached and end-terrace homes in 2026, costing £45,000–£75,000.

Quick answer

Typical UK price range: £45,000–£90,000. Typical time: 8–10 weeks.

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Loft conversion type Velux / rooflight Dormer Hip-to-gable Mansard L-shaped

Loft floor area (m²)

Region London South East South West Midlands North of England Scotland Wales Northern Ireland

Specification level Basic / standard Mid-range Premium / high-end

Extras

En-suite bathroom £8,000–£12,000 Extra Velux windows £1,500–£1,500 Underfloor heating £2,500–£4,500 New staircase £1,800–£3,500 Walk-in wardrobe £1,500–£3,500

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Estimate only. Prices reflect 2026 UK market data — get quotes from local tradespeople for accurate pricing.

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Budget Under £5,000 £5,000 – £15,000 £15,000 – £30,000 £30,000 – £60,000 £60,000+ Not sure

Timeline As soon as possible 1 – 3 months 3 – 6 months 6+ months Just researching

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Key points

• Best for end-of-terrace or semi-detached houses with hipped roof ends
• £1,700–£2,400 per m² — the second most expensive after mansard
• Usually combined with a rear dormer for a full master suite
• Permitted development in most cases

Cost breakdown

Item	Low	High
Gable wall build + brickwork	£8,000	£14,000
Rear dormer (typically included)	£10,000	£18,000
Roof structure + tiling	£4,500	£8,000
Insulation + plastering	£4,500	£7,500
Staircase + flooring	£3,500	£6,500
Electrics + plumbing	£3,000	£5,500

Cost by UK region

Region	Typical cost
London	£91,125
South East	£84,375
South West	£74,250
Midlands	£67,500
North England	£60,750
Scotland	£64,125
Wales	£60,750

How to save money

• Specify brick matching with samples — the new gable is visible from the street
• Bundle with rear dormer for one scaffold bill
• Consider en-suite at this scale — only £8,000–£12,000 extra and adds 5–10 % value

How to find a trusted tradesperson

Get at least 3 quotes from vetted UK trade networks:

• Checkatrade
• MyBuilder
• Bark

FAQs

Will a hip-to-gable add a lot of space?

Yes — typically 25–40 % more usable floor area than a Velux, and often enough for a master bedroom with en-suite.

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Disclaimer: Prices are guide ranges based on 2026 UK market data. Get quotes from local tradespeople for accurate pricing.