How Much Does a Hip-to-Gable Conversion Cost?
A hip-to-gable loft conversion costs between £30,000 and £50,000 in the UK and is suited to semi-detached or detached homes with a hipped roof.
All prices include a free feasibility survey, structural engineering, planning checks, building regulations submission, and the full build. Our quotes are fixed-price — no hidden costs.
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Hip-to-Gable Conversion Price Breakdown
Typical price range
£30,000 – £50,000
Starting from
£30,000
Typical duration
8–12 weeks
A hip-to-gable conversion replaces the sloping hip end of a roof with a vertical gable wall, significantly increasing the usable floor area. It is particularly suited to semi-detached and detached properties with a hipped roof, and is often combined with a rear dormer for maximum space.
The price range above covers the full project — including your structural engineer, all building materials, labour, and building regulations sign-off. We provide fully itemised quotes so you know exactly what you are paying for.
What Affects the Cost?
Loft Size
Floor area and ridge height directly affect material and labour costs. Larger lofts cost more but add proportionally more value.
Roof Pitch
Steeper pitches provide more natural headroom and are generally cheaper to convert. Shallow pitches may require more structural work.
Structural Work
Some conversions require steel beams, new joists, or party wall agreements. These add cost but are included in our fixed-price quotes.
Specification
The quality of windows, insulation, flooring, and fixtures affects the final price. We offer a full range of specification levels.
Planning
Most conversions fall under Permitted Development. Conservation areas or Article 4 zones may need a planning application (typically £200–£500 in fees).
Location
London and South East properties typically fall at the upper end of price ranges due to higher labour costs.
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Available across London
Service details
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