Roof windows fitted into the existing roof slope — the most affordable conversion type with minimal structural change. Compare up to 3 free quotes — no obligation.
A Velux (rooflight) loft conversion uses windows set into the existing roof slope rather than adding a dormer structure. Because the roof shape is unchanged, Velux conversions are almost always within Permitted Development rights and require less structural work, making them the most affordable route to a usable loft room.
The limitation is headroom — the usable floor area is reduced by the roof slope on both sides. This makes them ideal for studies, single bedrooms, playrooms and hobby spaces. Getting 3 quotes ensures competitive pricing for what can still be a significant project.
Typical cost: basic Velux conversion (2 roof lights) £15,000–£22,000. Larger conversion with more roof lights £20,000–£30,000.
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.”