Covering Isleworth
Isleworth sits 10 miles west of London, with Hounslow 1 miles to the south-west and Heston 2 miles to the west.
Homes in London
Much of London’s housing is Victorian and Edwardian terraces, which is why side return extensions, rear dormers and mansards are so common. Many streets are in conservation areas, and several boroughs use Article 4 directions that remove some permitted development rights.
What do you get with a hip-to-gable loft conversion?
A hip-to-gable loft conversion rebuilds the sloping side (the hip) of a semi-detached or detached house roof as a vertical gable wall, extending the ridge and creating enough space for a staircase and rooms. It is usually combined with a rear dormer.
- Volume calculation and planning check
- Gable wall build in brick, block or render
- Rear dormer and roof coverings to match
How much should I budget for a hip-to-gable loft conversion?
Guide prices for hip-to-gable loft conversions, including VAT where it applies. Your fixed price is confirmed in writing after the survey.
| Hip-to-gable loft conversions | Guide price incl. VAT |
|---|---|
| Hip-to-gable with rear dormer | £60,000 to £80,000 |
| Double hip-to-gable (detached house) | £70,000 to £95,000 |
Planning and building rules in Isleworth
English projects need planning clearance from the local council, building regulations sign-off from building control, and party wall notices where the work is on or near a shared boundary. We prepare and manage all three.
In England many loft conversions are permitted development: the extra roof volume must stay within 40 m³ on a terraced house or 50 m³ on a semi or detached house, nothing can sit higher than the existing ridge, no dormer can face a road on the main elevation, and side windows must be obscure-glazed and non-opening below 1.7 m.
What can affect a hip-to-gable loft conversion?
- Hip-to-gable volume counts towards the permitted development allowance.
- Scaffolding goes up on the side of the house, which may need a neighbour’s agreement.
How does the project run?
- Tell us about the project. Call, use the guide price tool or send the form with a few photos and a postcode.
- We visit and measure. A surveyor checks the house, the boundaries and the ground, and discusses what is realistic.
- Price and paperwork. The design is priced line by line, and we submit the planning and building control applications.
- Construction and completion. One site lead co-ordinates every trade through to the building control certificate.
Hip-to-gable loft conversions: common questions
How long does it take?
About 9 to 13 weeks on site.
Can a bungalow have a hip-to-gable conversion?
Yes, often combined with dormers to create a chalet-style first floor.
Can you visit a house in Isleworth to quote?
Yes. After a short call we arrange a site visit to measure up and agree what the design needs to do, then send a written price.
Hip-to-gable loft conversions near Isleworth
- Hip-to-gable loft conversions in Hounslow
- Hip-to-gable loft conversions in Heston
- Hip-to-gable loft conversions in Richmond
- Hip-to-gable loft conversions in Southall
Learn more about hip-to-gable loft conversions, or see every project we cover in Isleworth.