Conservation rooflights in Sidcup: what is involved?
Our conservation rooflights service in Sidcup covers slim, low-profile steel-look rooflights for period and listed roofs. Every job starts with a survey of the opening, the roof covering and the room below, and a fixed written price.
Many London roofs are reached only through the house or over neighbouring property, so lifting heavy glass is planned at survey rather than on the day. Think of conservation rooflights for slate and plain-tile roofs where a quiet roofline matters.
We work across Greater London, including Sidcup, and in neighbouring towns such as Bexley and Welling. Access, parking and how the glass reaches the roof are all checked at the survey.
Choices for your Sidcup project
- Toughened or laminated double glazing
- Blinds
- Flashings for slate or plain tile
- Steel or aluminium frames
- Manual or electric opening
- Suits slate and plain-tile roofs
- Double glazed behind a period look
Before you order: points to check
- Projection above the roof line is limited — usually as flush as possible
- Listed building consent is needed for listed buildings
Consents for conservation rooflights in Sidcup
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.
Under Approved Document L, a rooflight added to an English home must achieve at least 2.2 W/m²K (horizontal plane), and a roof window 1.4 W/m²K or Window Energy Rating Band B. The Future Homes and Buildings Standards, published in March 2026, apply from 24 March 2027 and keep the 2.2 W/m²K limit for rooflights.
Read the planning permission guide before you commit to a design.
Conservation rooflights prices in Sidcup
Prices below are shown including and excluding VAT. In Sidcup, as elsewhere, making good inside and access equipment are the main variables.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large or electric conservation rooflight | £2,755 – £4,195 | £2,295 – £3,495 |
| Standard conservation rooflight Typical | £2,035 – £2,755 | £1,695 – £2,295 |
| Small conservation rooflight | £1,795 – £2,155 | £1,495 – £1,795 |
How the job runs
- Send the details. Postcode, rough size and a photo of the roof and room.
- Measure and check. A surveyor visits Sidcup, measures and checks structure and access.
- 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
Other services in Sidcup
Questions about conservation rooflights in Sidcup
Can they open?
Yes, most are top-hung or side-hung for ventilation and cleaning, with manual or electric operation.
Do I need consent for a conservation rooflight?
On a listed building you need listed building consent. In a conservation area, check with the council — many areas have Article 4 directions affecting roof alterations.
Can you copy an original rooflight?
Some makers produce bespoke sizes to match an existing opening. We can survey and quote.
Do I need to be at home for the survey in Sidcup?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
Can you work alongside my builder in Sidcup?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
