Do I Need Planning Permission for a Roof Window at the Front?

A roof window at the back of a house is out of sight, and almost nobody comments on it. The same window on the street side of the roof is visible to every neighbour and passer-by, and it changes how the house reads from the road. That is why front facing skylight planning is the question people ask most often, and why councils care about it more than about rear slopes.

The national rules are the same for both slopes, though. The rooflight rights sit in Class C of the General Permitted Development Order 2015 (Part 1, Schedule 2), and they draw no distinction between the front slope and the back. A front roof window that meets the conditions is permitted without an application. What does differ is the risk that a local rule has taken the right away, and that risk is concentrated on the street-facing side of older houses.

The position across the whole roof is set out in planning permission for a skylight. This page deals only with the front, and with what changes there.

For a house in England, a roof window on any slope, front included, is permitted development when it meets two limits. First, the glass and frame may stand no more than 150mm clear of the roof slope. Second, the window must not stand taller than the roof's highest point. Roof windows set flush into a slate or tile covering usually clear both limits easily, which is why the front slope of a terrace is often fine.

A third condition applies to a window in a slope that forms a side elevation, as on some corner houses and end-of-terrace roofs. Obscure glazing is compulsory there, and the window has to be fixed shut except where every opening part is higher than 1.7m above the room's floor. That condition is about side elevations, not about the front, and it rarely matters for a street-facing slope.

Flats and maisonettes sit outside these rights altogether, because permitted development for houses does not extend to them. If you live in a flat, you need to ask the council, or the freeholder, before any cutting into the roof starts. The full wording is on the Planning Portal.

• Stands 150mm or less clear of the roof slope
• Top stays no higher than the roof's high point
• On a house, not a flat or maisonette
• No Article 4 direction removing the right
• Not a listed building

A local order called an Article 4 direction can switch off certain permitted development rights across a defined area, so an application becomes necessary there when it would not be elsewhere. Councils often make them in conservation areas to protect the look of the street, and the roof facing the street is exactly what they have in mind. On Merseyside and the Wirral, Victorian streets and villa roads are typical examples, because their slate roofs are part of the character.

A conservation area address does not on its own remove the right to fit a rooflight. What takes it away is an Article 4 direction covering that area, and plenty of conservation areas have no direction that touches roof windows at all. Others do, and the direction often names the front or visible slopes specifically. The two questions are therefore separate: is the house in a conservation area, and does a direction apply to rooflights on it?

Only the council can answer the second question with certainty. Its planning team keeps the list of directions and the maps, and many councils publish them on their website. For Liverpool, that is liverpool.gov.uk, and the other councils across our area publish theirs in the same way. We check before we quote a front-slope window in a street that looks protected, because it saves you an application you may not need, or a window you may not be allowed to fit.

Listed buildings are separate. They need listed building consent for work that affects their character, and a rooflight on the front slope almost always does. That is covered in the listed building consent guide, and the wider issues of conservation areas are in the conservation area rooflights page.

Start with the house. Is it a house, not a flat? Is it listed? Then look at the address on the council map to see whether it sits in a conservation area and whether an Article 4 direction is shown. A short email to the planning team, quoting the address and saying you want to fit a roof window on the front roof slope, usually brings a clear answer. Keep the reply.

Planning is one matter; the Building Regulations are another, and a new roof window counts as controlled work under them. We report the notifiable work to Building Control, which leaves you no separate approval to chase. Planning and Building Regulations are different systems, and passing one does not satisfy the other. A house in Wales follows different permitted development rules, set by the Welsh Government.

When you want a front-slope window priced, a survey comes first. We look at the roof, the street and the likely planning position, and put a firm price in writing. Get a free quote For the full range of choices, see roof window installation.