Hip to Gable Loft Conversion London and Hertfordshire
Maximise your loft space by converting the sloped hip roof into a vertical gable wall. LCCL Construction designs and builds hip to gable loft conversions across London and Hertfordshire — the ideal conversion for semi-detached and detached houses. Full design and build from £35,000. LABC Award Winners 2024. Over 200 reviews rated 4.7 out of 5.
LABC Awards
Winners 2024
200+ Reviews
4.7 / 5 Rating
NFB Members
LABC Partners
What Is a Hip to Gable Loft Conversion?
A hip to gable loft conversion extends the sloped side of a hipped roof — the side that angles inward — outward to create a flat vertical gable wall. This eliminates the sloping area on one or both sides of the loft, significantly increasing the usable floor space and headroom.
Hip to gable conversions are the most popular loft conversion for semi-detached houses in London because these properties typically have a hipped roof on the side facing the neighbour. By straightening the hip into a gable, you gain a substantial amount of additional loft space that would otherwise be unusable.
A hip to gable conversion is almost always combined with a rear dormer to maximise the total loft area. The combination creates enough space for a large master bedroom with en-suite, or two bedrooms and a bathroom.
LCCL Construction specialises in hip to gable loft conversions across London and Hertfordshire. Based in Finchley, London N3, with over 20 years of experience, 200+ reviews rated 4.7/5 and LABC Awards Regional Winners 2024.
How Much Does a Hip to Gable Loft Conversion Cost?
Hip to gable loft conversion costs in London typically range from £35,000 to £60,000 depending on the property type, whether one or both hips are converted, and the level of specification:
Single hip to gable + rear dormer: £35,000 to £45,000.
Double hip to gable + rear dormer: £45,000 to £55,000.
Hip to gable + rear dormer + front rooflight: £40,000 to £60,000.
Prices include full design and build — architectural design, structural calculations, building regulations, construction, electrics, plumbing, plastering, decoration, staircase and bathroom. Get an instant quote at lcclconstruction.co.uk or call 020 8037 7332.
Subject final drawings, how big the area is, location, finishing, structural drawings, alteration, time when, costs subject to change.
Planning Permission
Most hip to gable loft conversions on semi-detached and detached houses fall under permitted development rights. However, hip to gable conversions that face a highway (front or side facing a road) may require planning permission in some London boroughs.
The volume limits are 50 cubic metres for semi-detached and detached houses. Building regulations approval is always required. LCCL Construction handles all planning and building regulations as part of our service.
What Is Included?
Full design and build: consultation, measured survey, architectural design, planning, building regulations, structural calculations, party walls, all construction, staircase, electrics, plumbing, plastering, decoration, building control sign-off and optional 10-year LABC warranty.
How Long Does It Take?
A hip to gable loft conversion typically takes 10 to 14 weeks to build. The full timeline from consultation to completion is 5 to 7 months.
Areas We Cover
We design and build hip to gable loft conversions across London and Hertfordshire including Barnet, Finchley, Hendon, Muswell Hill, Highgate, Hampstead, Southgate, Enfield, Edgware, Borehamwood, St Albans, Potters Bar, Bushey, Watford, Ealing, Clapham, Putney, Wandsworth, Hackney, Islington, Camden and surrounding areas. Call 020 8037 7332.
Frequently Asked Questions
How much does a hip to gable loft conversion cost?
Hip to gable costs in London range from £35,000 to £60,000 for full design and build. A single hip to gable with rear dormer typically costs £35,000 to £45,000.
Is a hip to gable better than a dormer?
A hip to gable conversion creates more space than a dormer alone because it straightens the sloped side of the roof. Most hip to gable conversions also include a rear dormer for maximum space.
Do I need planning permission for hip to gable?
Most hip to gable conversions on semi-detached and detached houses fall under permitted development. Conversions facing a highway may need planning permission. LCCL Construction checks eligibility for your property.
Which houses suit a hip to gable conversion?
Semi-detached and detached houses with hipped roofs are ideal. This includes most 1930s semis, Edwardian detached houses and many suburban properties across London and Hertfordshire.
Can you do a double hip to gable?
Yes. On detached houses with hips on both sides, we can convert both hips to gables. This creates the maximum possible loft space and is particularly effective on larger detached properties.
How do I get started?
Call 020 8037 7332, book a free consultation at lcclconstruction.co.uk, or get an instant quote online.