How we approach walk-on rooflights in Portsmouth
We handle walk-on rooflights across Hampshire, including Portsmouth. In short: structural glass you can stand on, set flush into terraces and floors. The survey checks structure, weathering and orientation, so the quote reflects your actual roof.
Larger gardens in much of the South East mean deeper rear extensions, and deeper rooms need light from above rather than only from the doors. Walk-on rooflights suit terraces where the light below matters as much as the space above.
We work across Hampshire, including Portsmouth, and in neighbouring towns such as Gosport and Fareham. Access, parking and how the glass reaches the roof are all checked at the survey.
Options we can specify in Portsmouth
- Double or triple glazed with a structural top pane
- Anti-slip frit or etched top surface
- Integrated in paving pedestals or a timber deck
- Fixed or with privacy interlayer
- Internal floor panels between storeys
- Pairs with a sliding box unit for terrace access
- Flush with paving or decking — no trip edge
Before you order: points to check
- Structural support and the design load must be confirmed by the manufacturer or an engineer
- Glass on roofs people can reach must not be fragile — check the non-fragility rating
Planning, building control and Portsmouth
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 Portsmouth
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 or bespoke walk-on panel | £6,595 – £11,995 | £5,495 – £9,995 |
| Mid-size walk-on rooflight Typical | £4,795 – £6,595 | £3,995 – £5,495 |
| Small walk-on panel | £3,595 – £4,795 | £2,995 – £3,995 |
The process, step by step
- Send the details. Postcode, rough size and a photo of the roof and room.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- 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.
Walk-on rooflights near Portsmouth
Related work in Portsmouth
Common questions
Will it sit flush with my paving?
Yes — the unit is set on its own upstand so the glass finishes level with the surrounding paving or decking.
Does it need a structural engineer?
Often, yes. Where the unit sits on new or altered structure, an engineer confirms the support and the manufacturer confirms the glass.
Is the glass slippery?
Walk-on glass has an anti-slip finish, usually a ceramic frit or etched pattern. Like any outdoor surface it needs cleaning to stay effective.
Will I need planning permission in Portsmouth?
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.
Do I need to be at home for the survey in Portsmouth?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
