How we approach sliding rooflights in Harrow
We handle sliding rooflights across Greater London, including Harrow. In short: box rooflights whose glass lid slides back for walk-out roof access. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
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. Sliding rooflights suit walk-out access where a hatch would feel cramped.
Harrow is around 16 km from central London, and we survey and fit throughout that part of Greater London, including the HA2 district.
Specification options
- Rain sensor
- Double or triple glazing
- Anthracite, black or RAL frames
- Electric drive with safety edge
- Integrated balustrade on some ranges
- Replaces a dormer or stair enclosure on some roofs
- Electric operation with safety stops
Things we check at survey
- The stair opening and headroom must meet Building Regulations
- Weight and point loads need a structural check
Planning and building rules for Harrow
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. 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.
Guide prices for Harrow
Prices below are shown including and excluding VAT. In Harrow, as elsewhere, making good inside and access equipment are the main variables.
| 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 |
The process, step by step
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Harrow address.
- Measure and check. A surveyor visits Harrow, measures and checks structure and access.
- Fixed quote. Product, work and price in writing — nothing is ordered until you agree.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Nearby towns
More we do in Harrow
Questions about sliding rooflights in Harrow
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.
What if it is raining?
Fitted with a rain sensor, an electric unit closes automatically. Most also have a manual override for power cuts.
Is a sliding rooflight better than an access hatch?
For daily use, usually yes — you walk out under open sky instead of climbing through a hinged hatch. A hatch costs less and suits occasional access.
Do I need to be at home for the survey in Harrow?
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 Harrow?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
