Dormer windows in Freshwater
We design, build and weatherproof dormer windows and dormer loft conversions for homeowners across Freshwater, working from first survey through to building control sign-off.
What we build in Freshwater
Roofs across Freshwater are dominated by Victorian and Edwardian terraces, interwar semi-detached houses and post-war bungalows, and that mix decides almost everything about what a dormer here needs to look like and how it has to be built.
Whether that is a single flat roof dormer to make a back bedroom usable, or a full-width rear dormer with a bedroom and en-suite, the process is the same: a free measured survey first, a fixed written price second, and nothing else until you have both in front of you.
Planning permission in Freshwater
We run the permitted development test on your specific property: set-back from the eaves, height against the ridge, volume allowance and whether an Article 4 direction applies locally.
Freshwater sits in Isle of Wight, and local authority interpretation of the volume allowance does vary — which is why we check the planning history at your specific address rather than assuming the neighbours' dormer sets a precedent.
How the job runs
Finish and sign-off
Plaster, electrics, decoration and making good, final building control inspection and your completion certificate.
Design and consent
Measured drawings, elevations and sections. We submit the planning application or lawful development certificate and the building regulations application.
Structure
Ridge beam and floor steels craned or manhandled in, new joists laid, the dormer frame built and sheathed.
Glazing
Windows fitted square, sealed and drained, with escape-compliant opening lights where required.
The completion certificate is part of the deliverable, not an afterthought. It is the document that makes the space count when you come to sell. If you want to know what your roof will actually take, the survey is free and there is no obligation attached to it.
Popular in Freshwater
Dormer work we are asked for most
Flat Roof Dormers
The most space-efficient dormer — a flat-topped box that squares off the roof slope.
Learn moreShed Dormers
A single shallow slope running with the main roof — wide, low and understated.
Learn moreEyebrow Dormers
A curved, brow-like swell in the roof — no cheeks, no vertical faces.
Learn moreVelux to Dormer Conversions
Already have rooflights? Convert the slope to a dormer and gain standing height.
Learn moreTimber Dormer Windows
Engineered hardwood or softwood — the right answer on period and listed roofs.
Learn moreDormer Cladding
Re-clad tired dormer cheeks and faces in tile, lead, zinc, timber or GRP.
Learn moreFAQs
Dormers in Freshwater — FAQs
Do I need planning permission for a dormer window?
Rear dormers on a house often fall under permitted development, provided the dormer is set at least 200mm back from the eaves, sits below the ridge line, uses materials similar in appearance to the existing house, and stays within the volume allowance — 40m³ for a terrace, 50m³ for a semi or detached. Front-facing dormers, flats and maisonettes, listed buildings, conservation areas and any property with an Article 4 direction all need a full planning application. We check the constraints on your specific address before we quote.
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.
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.
What is the best roof covering for a flat dormer?
GRP fibreglass and EPDM rubber are the two we specify most. GRP cures into a single seamless laminate with bonded trims and suits small tops with several upstands. EPDM is a one-piece membrane that copes better with movement on larger spans. Both carry twenty-year guarantees; mineral felt is cheaper but has a materially shorter life.
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.
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 Freshwater tells you what is achievable, what it needs, and what it costs — before you commit to anything.