How we approach sliding rooflights in Coulsdon
Our sliding rooflights service in Coulsdon covers box rooflights whose glass lid slides back for walk-out roof access. 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. In Coulsdon, as anywhere, sliding rooflights are the usual choice for walk-out access where a hatch would feel cramped.
From Coulsdon to Purley, Banstead and Wallington, the same survey-first process applies: measure, specify, fix the price, then fit.
What you can choose
- Box (glazed sides) or flat sliding lid
- Anthracite, black or RAL frames
- Double or triple glazing
- Integrated balustrade on some ranges
- Rain sensor
- Full-width, walk-out access to a roof terrace
- Replaces a dormer or stair enclosure on some roofs
Things we check at survey
- Electric units need a dedicated supply and commissioning
- Needs space on the roof for the lid to slide clear
Consents for sliding rooflights in Coulsdon
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. 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.
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.
Our planning guide covers each nation in more detail.
Sliding rooflights prices in Coulsdon
The ranges below are typical for straightforward jobs; your fixed price follows a survey of your roof.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large box slider with electric drive | £11,995 – £20,395 | £9,995 – £16,995 |
| Standard box slider Typical | £8,995 – £13,195 | £7,495 – £10,995 |
| Flat sliding lid | £7,195 – £9,595 | £5,995 – £7,995 |
What happens next
- Tell us what you have. Send the CR5 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.
Sliding rooflights near Coulsdon
More we do in Coulsdon
Common questions
Does it need planning permission?
A box unit that projects above the roof plane can need planning permission, especially on the front of a house or in a conservation area. We check before you order.
How heavy is it?
Box sliders weigh hundreds of kilograms, so delivery may need a crane or lifting gear, and the structure must be checked.
What if it is raining?
Fitted with a rain sensor, an electric unit closes automatically. Most also have a manual override for power cuts.
Will I need planning permission in Coulsdon?
Most rooflights on English houses do not need planning permission, provided they keep within 150 mm of the roof surface and below the ridge line.
Do I need to be at home for the survey in Coulsdon?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
