Skylight replacement for Sevenoaks: the essentials
Thinking about skylight replacement in Sevenoaks? 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.
Orangery-style extensions with lanterns are popular across the South East, and solar-control glass makes a big difference on south-facing gardens. Think of skylight replacement for older extensions due a modern rooflight.
From Sevenoaks to Tonbridge, Orpington and Swanley, the same survey-first process applies: measure, specify, fix the price, then fit.
What you can choose
- Upstand rebuild and insulation
- Fixed to electric opening
- Like-for-like size replacement
- Misted glass unit replacement only
- Roof window replacement in pitched roofs
- Cures most chronic leaks
- Often reuses the existing opening
Before you order: points to check
- A replacement is a chance to meet current thermal standards
- Enlarging the opening changes the structure and may need approval
Planning and building rules for Sevenoaks
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.
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. Replacing a rooflight or roof window can be self-certified by an installer registered with an authorised competent person scheme; otherwise building control approval is needed.
Read the planning permission guide before you commit to a design.
Guide prices for Sevenoaks
Guide prices for skylight replacement in Sevenoaks are the same as anywhere we work — what changes the price is the job: access, structure, scaffold and finishing.
| 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
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Sevenoaks address.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Agree the quote. You approve the specification and price before anything is ordered.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Nearby towns
Related work in Sevenoaks
Common questions
Will it mess up my ceiling?
We protect the room and make good the reveal. Minor decoration may be needed afterwards.
How long does a replacement take?
Usually a day for a standard rooflight on a sound upstand.
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 Sevenoaks?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
Is the survey in Sevenoaks free?
Yes for new installations. Repair visits are charged, and we tell you the price before we book.
