Skylight replacement for New Malden: the essentials
Our skylight replacement service in New Malden covers replacing tired domes and failed glass with a modern rooflight. 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. Skylight replacement suits older extensions due a modern rooflight.
New Malden is around 15 km from central London, and we survey and fit throughout that part of Greater London, including the KT3 district.
Choices for your New Malden project
- Roof window replacement in pitched roofs
- Dome to flat glass upgrade
- Like-for-like size replacement
- Misted glass unit replacement only
- Upstand rebuild and insulation
- Option to add opening and rain sensor
- Clearer view and more light
What to check first
- A replacement is a chance to meet current thermal standards
- Upstand and roof condition decide the scope
Planning, building control and New Malden
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. 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.
Skylight replacement prices in New Malden
These are typical supply-and-fit ranges. For an address in New Malden, scaffold, a hoist for heavy glass, or a new structural opening can move the figure, which is why we survey first.
| 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 |
The process, step by step
- Tell us what you have. Send the KT3 postcode, a rough size and a couple of photos.
- Measure and check. A surveyor visits New Malden, measures and checks structure and access.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Skylight replacement near New Malden
More we do in New Malden
Common questions
Can you replace only the misted glass?
Sometimes, if the frame is sound and the maker supplies replacement units. Often a complete new rooflight costs little more and performs better.
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 New Malden?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
Will I need planning permission in New Malden?
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.
