Eyebrow Dormers in Cornwall
Our teams install eyebrow dormers throughout Cornwall, handling structure, weatherproofing, glazing and finish as one job with one point of contact.
Eyebrow Dormers — indicative geometry
Eyebrow Dormers for Cornwall homes
The housing stock around Cornwall runs to granite and rendered cottages, Victorian villas and post-war bungalows — so the first question at survey is always which of those you have, because the structure underneath differs completely.
An eyebrow dormer is a wave in the roof covering rather than a box on top of it. The rafters sweep up and over the window in a shallow arc and the tiling or slating is coursed round the curve. It is the most demanding dormer to build well — it wants a roofer who can swan-neck a course of plain tiles — and it is unmatched on thatched, cottage and Arts and Crafts roofs.
Key specification
| Typical width | 1.0m – 2.4m |
|---|---|
| Rise | 300mm – 600mm at the centre |
| Roof finish | Plain tile or slate, coursed round |
| Glazing | Curved head timber casement or fixed light |
Planning and building control in Cornwall
Whether you need planning permission or a lawful development certificate depends on the elevation, the volume already used and the local authority's Article 4 position — all of which we confirm before design work starts.
Building regulations approval is separate and always required. We submit the application, book the inspections around the programme and hand you the completion certificate at the end — the document a buyer's surveyor will ask to see.
Why homeowners in Cornwall use us
One quotation covers scaffold, structure, weatherproofing, glazing, plastering and sign-off. You are not coordinating four trades who each blame the last one.
If you want to know what your roof will actually take, the survey is free and there is no obligation attached to it.
Other dormer work in Cornwall
FAQs
Eyebrow Dormers in Cornwall — FAQs
How long does a dormer take to build?
A single box or flat roof dormer is typically three to five weeks on site. A full-width rear dormer runs five to eight weeks, and an L-shaped dormer on a terrace with an outrigger is closer to seven to ten. A complete dormer loft conversion including the staircase, services and finishes is usually eight to twelve weeks from scaffold up to sign-off.
Can you build a dormer on a bungalow?
Usually yes, and bungalows often give the best results because the spans are wide and there are no party walls. The deciding factor is ridge height: you generally want at least 2.6m from the top of the ceiling joists to the underside of the ridge. We measure this at survey before committing to anything.
Can I put a dormer on the front of my house?
Front-facing dormers are not covered by permitted development and always need a full planning application. Approval depends heavily on the street scene — planners look at whether other dormers already exist on the road, and at proportion, position and materials. Hipped and pitched forms are approved far more often than flat boxes on a front elevation.
Do you handle the planning application?
Yes. We prepare measured drawings, elevations and sections, submit the application or the lawful development certificate, and deal with the case officer's queries. On conservation and listed work we also put together the heritage justification the application needs.
What is the difference between a dormer and a Velux?
A rooflight sits flush in the roof slope and gives you light without any extra height — you still have a sloping ceiling. A dormer projects out from the roof and creates vertical walls with a level ceiling behind them, so you gain genuinely usable standing space and floor area, not just daylight.
Find out what your roof will take
A free measured survey in Cornwall tells you what is achievable, what it needs, and what it costs — before you commit to anything.