uPVC Dormer Windows in Hertfordshire
From the first measured survey to the completion certificate, we run upvc dormer windows projects in Hertfordshire as a single, managed piece of work.
uPVC Dormer Windows — indicative geometry
uPVC Dormer Windows for Hertfordshire homes
The housing stock around Hertfordshire 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.
Modern multi-chamber uPVC gives excellent U-values, needs no decoration and shrugs off the weather exposure a dormer takes on all four sides. Foiled finishes — anthracite grey, black, cream, woodgrain — have largely killed the old objection that uPVC only comes in white. On a rear dormer that nobody sees from the street, it is the sensible default.
Key specification
| Frame | 70mm or 80mm multi-chamber, steel reinforced |
|---|---|
| U-value | 1.2 W/m²K typical, 0.8 with triple |
| Finishes | White, foiled woodgrain, anthracite, black, cream |
| Opening styles | Casement, tilt-and-turn, top-hung, fixed |
Planning and building control in Hertfordshire
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 Hertfordshire 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.
Book the survey, get the fixed written price, and decide in your own time. Nothing about that process commits you to anything.
Other dormer work in Hertfordshire
- Dormer Window Replacement in Hertfordshire
- Sash Dormer Windows in Hertfordshire
- GRP Fibreglass Dormer Roofing in Hertfordshire
- Flat Roof Dormers in Hertfordshire
- Hipped Roof Dormers in Hertfordshire
- L-Shaped Dormers in Hertfordshire
- Cat Slide Dormers in Hertfordshire
- Velux to Dormer Conversions in Hertfordshire
FAQs
uPVC Dormer Windows in Hertfordshire — FAQs
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.
Do you work on listed buildings and in conservation areas?
Yes. That work is detail-led: matching sightlines, glazing bar widths, cill projections and cheek finishes to what survives, and specifying timber, lead and natural slate rather than modern equivalents. We prepare the drawings and heritage statement for listed building consent alongside the planning application.
Find out what your roof will take
A free measured survey in Hertfordshire tells you what is achievable, what it needs, and what it costs — before you commit to anything.