Skylight replacement in Derby: what is involved?
Thinking about skylight replacement in Derby? The short answer: replacing tired domes and failed glass with a modern rooflight. The longer answer depends on your roof, which is why we survey before we price.
Industrial and commercial units around Midlands towns often still have their original rooflight sheets, which are due for replacement. In Derby, as anywhere, skylight replacement is the usual choice for older extensions due a modern rooflight.
We cover all of Derby and the DE1 district, and nearby Belper and Ilkeston.
What you can choose
- Upstand rebuild and insulation
- Roof window replacement in pitched roofs
- Like-for-like size replacement
- Dome to flat glass upgrade
- Fixed to electric opening
- Cures most chronic leaks
- Better thermal performance
What to check first
- Upstand and roof condition decide the scope
- A replacement is a chance to meet current thermal standards
Planning, building control and Derby
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. Listed buildings need listed building consent, flats have no householder permitted development rights, and an Article 4 direction can remove the rights in some conservation areas.
Building Regulations Approved Document L sets a limiting U-value of 2.2 W/m²K for new or replacement rooflights in existing homes, measured in the horizontal plane; roof windows need 1.4 W/m²K or a Band B energy rating. 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.
See our building regulations guide for U-values, glazing limits and self-certification.
What does skylight replacement cost in Derby?
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 |
How the job runs
- Tell us what you have. Send the DE1 postcode, a rough size and a couple of photos.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Nearby towns
Related work in Derby
Common questions
What do you do with the old unit?
We remove it from site and recycle what can be recycled.
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.
Can I go bigger when replacing?
Possibly. Enlarging the opening means trimming joists, so we check the structure first.
Do I need to be at home for the survey in Derby?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
Do you offer skylight replacement in Derby?
Yes. We carry out skylight replacement in Derby and across Derbyshire. Send your postcode and we will offer a survey date when we reply.
