Conservation Dormer Windows in Perthshire and Stirlingshire
We are a dormer specialist, not a general builder who occasionally does roofs — and across Perthshire and Stirlingshire that focus shows up in the detailing.
Conservation Dormer Windows — indicative geometry
Conservation Dormer Windows for Perthshire and Stirlingshire homes
Most of the dormer work we take on around Perthshire and Stirlingshire is on Victorian and Edwardian terraces, interwar semi-detached houses and post-war bungalows, where the ridge height and the position of the existing purlins set the limits.
In a conservation area or on a listed building the dormer is judged on proportion, material and detail before anything else. We work from what is already on the street: matching sightlines, glazing bar widths, cill projections and cladding to the surviving original dormers, and preparing the elevations and sections your planning or listed building consent application needs.
Key specification
| Materials | Timber, lead, natural slate, clay tile |
|---|---|
| Glazing | Slim heritage or single-glazed secondary |
| Detail matching | Sightlines, bars, cills, cheek finish |
| Documentation | Elevations and sections for consent |
Planning and building control in Perthshire and Stirlingshire
Rear dormers on houses often sit inside permitted development, but the volume allowance is consumed by any previous loft or rear extension — so we check the planning history for the address before we say yes.
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 Perthshire and Stirlingshire use us
We would rather tell you at survey that your ridge height will not take what you want than take a deposit and find out in week three.
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 Perthshire and Stirlingshire
- Timber Dormer Windows in Perthshire and Stirlingshire
- Dormer Cladding in Perthshire and Stirlingshire
- Dormer Window Repairs in Perthshire and Stirlingshire
- Gable-Fronted Dormers in Perthshire and Stirlingshire
- Full-Width Rear Dormers in Perthshire and Stirlingshire
- Eyebrow Dormers in Perthshire and Stirlingshire
- Bungalow Dormer Conversions in Perthshire and Stirlingshire
- Dormer Window Replacement in Perthshire and Stirlingshire
FAQs
Conservation Dormer Windows in Perthshire and Stirlingshire — FAQs
Can you build a dormer in winter?
Yes, with adjustments. Temporary weather protection over the scaffold lets structural work continue in most conditions. GRP roofing needs dry conditions above about 5°C to cure properly, so in a cold spell we either sequence it differently or specify EPDM, which is unaffected.
How much does a dormer window cost?
A single flat roof dormer typically runs from around £9,000 to £20,000 supplied and fitted, depending on width, cladding finish and access. A full-width rear dormer on a semi is usually £28,000 to £45,000, and a complete dormer loft conversion including stairs, insulation, plaster and building control sign-off is more commonly £40,000 to £70,000. Our online guide-price tool gives you an indicative range in about a minute.
Does a dormer need building regulations approval?
Yes, always — permitted development covers planning, not building control. A dormer needs approval for structure, thermal performance under Part L, fire escape and protected route under Part B, and stairs under Part K if a staircase is involved. We handle the application, the inspections and the completion certificate.
Why is my dormer leaking?
In our experience the window itself is the cause less than a fifth of the time. Far more often it is the apron flashing at the dormer front, the lead soakers where the cheeks meet the roof slope, the back gutter behind a pitched dormer, or a split at an upstand in the flat covering. Water then tracks along a rafter and appears somewhere else entirely, which is why we trace the path before quoting.
Will a dormer add value to my house?
A properly built and signed-off dormer conversion adding a bedroom and bathroom typically returns a meaningful share of its cost in value, and more in areas where floor space is scarce. The building control completion certificate is what makes the space count as habitable floor area on a valuation — without it, surveyors will not include it.
Find out what your roof will take
A free measured survey in Perthshire and Stirlingshire tells you what is achievable, what it needs, and what it costs — before you commit to anything.