Covering Kilwinning
We work in Kilwinning (KA13) and the places around it, including Irvine, Troon and Kilmarnock.
Homes in Ayrshire
In Scotland many families extend bungalows and semis, while tenement flats bring shared ownership of roofs and walls that needs agreeing early.
What does a dormer loft conversion involve?
A dormer loft conversion builds a box-shaped extension out from the rear slope of the roof, creating vertical walls and full head height across most of the new floor. It is the most popular type of loft conversion because it gives the most usable space for the cost.
- Dormer frame, roof covering and cladding
- Staircase, insulation and plasterboard
- En-suite, electrics and fire-protected escape route
How much does a dormer loft conversion cost in Kilwinning?
What dormer loft conversions typically cost. These are guide ranges; the written quote for your house replaces them.
| Dormer loft conversions | Guide price incl. VAT |
|---|---|
| Rear dormer, bedroom only | £50,000 to £65,000 |
| Full-width dormer with en-suite | £60,000 to £80,000 |
| L-shaped dormer (over rear outrigger) | £65,000 to £90,000 |
What approvals does a dormer loft conversion need in Scotland?
In Scotland the key step is the building warrant, which must be granted before work begins. Planning permission is decided separately by the council, and work on shared walls is handled under your title deeds rather than a party wall act.
In Scotland, dormers and other roof enlargements usually need planning permission, especially on the front of the house.
What can change the price or programme?
- A flat dormer roof needs proper falls and a quality membrane.
- L-shaped dormers are common on Victorian terraces with a rear outrigger.
What are the steps?
- Start with a conversation. A short call or the online form is enough for us to understand what you want to build.
- Survey at your house. We look at the existing structure, services and access, and agree what the design needs to achieve.
- Drawings, approvals, written quote. We prepare the design, apply for the approvals it needs, and give you a fixed price in writing.
- Construction and completion. One site lead co-ordinates every trade through to the building control certificate.
Dormer loft conversions: common questions
How much does a dormer loft conversion cost?
Typically £50,000 to £80,000 including VAT, and up to around £90,000 for an L-shaped dormer.
How long does a dormer conversion take?
Around 8 to 12 weeks on site.
Can you visit a house in Kilwinning 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.
Dormer loft conversions in nearby towns
- Dormer loft conversions in Irvine
- Dormer loft conversions in Troon
- Dormer loft conversions in Kilmarnock
- Dormer loft conversions in Largs
Learn more about dormer loft conversions, or see every project we cover in Kilwinning.

