Dormer windows in Lincolnshire
We are a dormer specialist, not a general builder who occasionally does roofs — and across Lincolnshire that focus shows up in the detailing.
Dormers on Lincolnshire roofs
The housing stock around Lincolnshire runs to Victorian and Edwardian terraces, interwar semi-detached houses and post-war bungalows — so the first question at survey is always which of those you have, because the structure underneath differs completely.
We survey the roof before quoting anything. Ridge height, rafter span, purlin position and the condition of the existing structure decide which dormer forms are possible — and there is no substitute for a tape measure in the loft. The survey is free and carries no obligation.
Planning permission in Lincolnshire
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.
What we do across Lincolnshire
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.
- New dormers — flat roof, pitched, gable-fronted, hipped, shed, box, L-shaped, eyebrow and cat slide forms
- Full conversions — structure, staircase, insulation, plaster and building control sign-off
- Glazing — uPVC, timber, aluminium, sash and heritage-profile conservation windows
- Cladding and roofing — tile-hung, slate-hung, lead, standing-seam zinc, cedar and GRP
- Repairs — leak tracing, flashing renewal, rot repair and blown unit replacement
The quickest route is a photograph of the rear elevation over WhatsApp — we can usually tell you what is feasible before anyone visits.
Towns and cities
Where we work in Lincolnshire
10 towns and cities across Lincolnshire, plus the surrounding villages.
Services in Lincolnshire
Every dormer type, locally
Flat Roof Dormers in Lincolnshire
The most space-efficient dormer — a flat-topped box that squares off the roof slope.
Learn morePitched Roof Dormers in Lincolnshire
A miniature pitched roof over the dormer — the traditional, period-correct option.
Learn moreGable-Fronted Dormers in Lincolnshire
A pitched dormer with a vertical gable face — the classic 'dog-house' front elevation.
Learn moreHipped Roof Dormers in Lincolnshire
Three sloping faces instead of a gable — softer, and often easier to get past planning.
Learn moreShed Dormers in Lincolnshire
A single shallow slope running with the main roof — wide, low and understated.
Learn moreFull-Width Rear Dormers in Lincolnshire
Wall-to-wall across the back of the roof — the biggest gain in usable floor area.
Learn moreL-Shaped Dormers in Lincolnshire
A rear dormer joined to a second over the outrigger — the Victorian terrace answer.
Learn moreBox Dormers in Lincolnshire
A simple squared projection — the workhorse dormer for bedrooms and bathrooms.
Learn moreEyebrow Dormers in Lincolnshire
A curved, brow-like swell in the roof — no cheeks, no vertical faces.
Learn moreCat Slide Dormers in Lincolnshire
The main roof continues down past the dormer — a soft, cottage-style profile.
Learn moreDormer Loft Conversions in Lincolnshire
The full job — structure, dormer, stairs, insulation, plaster and building control sign-off.
Learn moreBungalow Dormer Conversions in Lincolnshire
Turn a bungalow's roof void into a first floor — often doubling the footprint.
Learn moreVelux to Dormer Conversions in Lincolnshire
Already have rooflights? Convert the slope to a dormer and gain standing height.
Learn moreDormer Window Installation in Lincolnshire
Supply and fit of the window itself into new or existing dormer openings.
Learn moreDormer Window Replacement in Lincolnshire
Swap tired, draughty or rotten dormer windows without touching the structure.
Learn moreuPVC Dormer Windows in Lincolnshire
Low maintenance, well insulated and the most cost-effective frame for a dormer.
Learn moreTimber Dormer Windows in Lincolnshire
Engineered hardwood or softwood — the right answer on period and listed roofs.
Learn moreAluminium Dormer Windows in Lincolnshire
Thermally broken aluminium — the slimmest frames and the largest possible glass area.
Learn moreSash Dormer Windows in Lincolnshire
Vertical sliding sashes sized and detailed for a dormer opening.
Learn moreConservation Dormer Windows in Lincolnshire
Heritage-profile dormers and glazing for conservation areas and listed buildings.
Learn moreDormer Cladding in Lincolnshire
Re-clad tired dormer cheeks and faces in tile, lead, zinc, timber or GRP.
Learn moreGRP Fibreglass Dormer Roofing in Lincolnshire
Seamless glass-reinforced polyester on flat dormer tops — no joints, no seams.
Learn moreLead & Zinc Dormer Roofing in Lincolnshire
Traditional code lead and standing-seam zinc for dormer roofs, cheeks and flashings.
Learn moreDormer Window Repairs in Lincolnshire
Leaks, rot, failed flashings, blown units and draughts — diagnosed and put right.
Learn moreWhat homeowners say
Judged on the junctions, not the sales pitch
“The survey was the useful bit — he told us the ridge height wouldn't take what we'd been sold elsewhere, and offered a shed dormer instead. Glad we listened.”
— Homeowner, Lincolnshire“Scaffold went up on the Monday, roof was open and weathertight by the Thursday. No drama, no surprises on the invoice.”
— Homeowner, Lincolnshire“We'd had two leaks patched by other firms. They traced it to the back gutter in an hour and it hasn't come back since.”
— Homeowner, LincolnshireComments shown are representative of feedback received. Verified reviews are being collected from launch.
FAQs
Dormers in Lincolnshire — FAQs
How wide can a dormer be?
Structurally, as wide as the roof — full-width rear dormers regularly run six to eight metres, carried on a steel ridge beam. The limits are usually planning volume allowances and the setbacks needed at eaves and ridge, rather than what can be built.
How disruptive is a dormer build?
Less than people expect, because most of the work happens above your ceilings and is reached from the scaffold. The noisy phases are opening up and installing steels, typically two to four days. Once the staircase is cut in there is dust and traffic through the house, and we sheet and protect the route for that period.
Can a dormer include an en-suite?
Very often, yes — a full-width or L-shaped dormer usually has enough floor area for a bedroom plus a shower room. The practical constraints are getting soil and waste down to an existing stack, and whether the head height over the shower tray works. Both are settled at survey.
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.
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.
Find out what your roof will take
A free measured survey in Lincolnshire tells you what is achievable, what it needs, and what it costs — before you commit to anything.