Convert a sloping hip end into a vertical gable wall, creating a dramatically larger loft space — popular on semis and detached houses. Compare up to 3 free quotes — no obligation.
A hip-to-gable conversion removes the inward-sloping 'hip' end of the roof and replaces it with a vertical gable wall, significantly increasing the loft's usable floor area. It is most common on semi-detached and detached houses where one or both ends of the roof slope inward. It is often combined with a rear dormer to maximise the conversion.
Hip-to-gable conversions typically require planning permission as they alter the roofline visibly from the street, particularly on semi-detached properties. Your specialist will advise on the planning position and handle applications as part of the project.
Typical cost: hip-to-gable only £20,000–£35,000. Hip-to-gable combined with rear dormer £40,000–£65,000.
Prices vary by region, subfloor condition and product choice. Compare 3 quotes for the most accurate price for your specific job.
“We had a rear dormer conversion done last summer — extra bedroom and en-suite for our teenage daughter. Got three quotes through this site, saved around £4,000 compared to the first firm we spoke to. The specialist handled planning permission and building regs start to finish. Highly recommend.”
“Hip-to-gable conversion on our 1930s semi. I was nervous about the planning application but the specialist I found here had done dozens in our street and knew exactly what to submit. Project came in on time at 10 weeks. The new master bedroom is brilliant.”
“L-shaped dormer on our Victorian terrace — created two rooms and a bathroom from what was a completely unusable loft. The comparison process gave me confidence I was paying a fair price. Building control sign-off came through with no issues. Absolutely transformed the house.”