What does skylight replacement in Dartford involve?
For Dartford homes and buildings we offer skylight replacement: replacing tired domes and failed glass with a modern rooflight. We measure first, specify to the opening and confirm any planning or building-control points before quoting.
Many South East homes have been extended more than once, and an old dome over an earlier extension is often due for replacement. Skylight replacement suits older extensions due a modern rooflight.
From Dartford to Bexley, Bexleyheath and Swanley, the same survey-first process applies: measure, specify, fix the price, then fit.
Options we can specify in Dartford
- Upstand rebuild and insulation
- Misted glass unit replacement only
- Like-for-like size replacement
- Roof window replacement in pitched roofs
- Dome to flat glass upgrade
- Better thermal performance
- Option to add opening and rain sensor
Things we check at survey
- Upstand and roof condition decide the scope
- Enlarging the opening changes the structure and may need approval
Planning, building control and Dartford
In England a rooflight on a house is usually permitted development under Class C if it projects no more than 150 mm beyond the roof slope and sits no higher than the ridge. A rooflight on a side-facing slope must be obscure-glazed, and fixed shut unless the opening part is more than 1.7 m above the floor.
For English homes the energy rules ask for rooflights of 2.2 W/m²K or better and roof windows of 1.4 W/m²K (or WER Band B); most modern double glazed units meet both. In an extension, glazing including rooflights is normally limited to 25% of the new floor area plus any windows or doors the extension covers, unless a whole-house calculation shows otherwise.
Our planning guide covers each nation in more detail.
Skylight replacement prices in Dartford
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Replacement with upstand rebuild and opening unit | £2,995 – £4,795 | £2,495 – £3,995 |
| Dome to flat glass upgrade Typical | £1,915 – £2,995 | £1,595 – £2,495 |
| Like-for-like glass rooflight | £1,555 – £2,155 | £1,295 – £1,795 |
What happens next
- Tell us what you have. Send the DA1 postcode, a rough size and a couple of photos.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Nearby towns
More we do in Dartford
Skylight replacement in Dartford: questions
Will it mess up my ceiling?
We protect the room and make good the reveal. Minor decoration may be needed afterwards.
Do I need building regulations approval to replace a rooflight?
Replacements in existing homes generally need to meet current thermal standards and may need notification or approval. We advise on the route for your job.
How long does a replacement take?
Usually a day for a standard rooflight on a sound upstand.
Will I need planning permission in Dartford?
English householder permitted development (Class C) normally covers rooflights that stand no more than 0.15 m proud of the roof plane and stay below the highest part of the roof.
Do I need to be at home for the survey in Dartford?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
