Rooflights and skylights in Dorking

Planning questions in Dorking go to Mole Valley District Council, which has its headquarters in the town. Surrey County Council is the county authority above it. Knowing which body answers which question saves a week of wrong emails.

For a rooflight, the district council is the one that matters. It publishes the conservation area guidance for the town, and it decides whether an application is needed where a street has special controls. Building Regulations are a separate matter from planning, and they apply to the work itself. We install to current Building Regulations, and where the work is notifiable we handle the Building Control notification, so that part does not land on you. Our guide to Building Regulations for rooflights explains which parts of the Approved Documents touch a new opening, including Parts L, K, B and F.

Planning is where the address decides. A roof window in a rear slope of a house with no special controls is one conversation. The same window on a street with extra protection is another. The position for your address is checked before we write a quote, and our page on planning permission for rooflights and skylights gives the general rules that the check starts from.

Mole Valley has 26 conservation areas. Dorking is one of only three, with Brockham and Leatherhead, where Article 4 Directions protect features of streets within the conservation area. That makes Dorking a town where the status of a street deserves a careful check.

An Article 4 Direction removes some of the usual permitted development rights, so work that would normally need no application may need one. Which features are covered, and on which streets, is set out by the council, not by us and not by a neighbour who had something done years ago. The conservation or planning position is checked for the address. Until that is done, nobody can say truthfully whether your rooflight needs an application.

What can be said is how the design side usually goes in a sensitive setting. A rooflight on a slope that cannot be seen from the street is easier to justify than one on the front. A low-profile conservation-style roof window sits closer to the tile line than a standard unit. A smaller opening with a slim frame draws less attention than a large one. Our conservation rooflight installation page sets out the products and the reasoning, and it is the better starting point if your house is in the protected part of town.

The town sits on the Lower Greensand Group, and the River Mole cuts through the North Downs at the Mole Gap. The Surrey Hills National Landscape covers a substantial part of Mole Valley district, particularly to the south and west of Dorking.

That geography does three things to a rooflight. First, it affects the light. Houses on rising ground or beside the gap receive daylight at angles that differ from houses on the flat, and a slope that faces the hills gets a different day from one that faces the town. The glass should be sized and placed for the light that room actually receives, which is why the survey includes standing in the space and reading the day. Our guide on sizing a rooflight for the room gives the arithmetic.

Second, it affects how far a roof is seen. Much of the district around the town is protected landscape. A rooflight in a house that looks out on protected countryside may be seen from a long way off, and the choice of a low-profile frame and a non-reflective finish is a courtesy to the landscape as well as to the planning officer.

Choosing a rooflight is easiest by room. The table sets four common rooms against the unit that usually fits and the thing to decide first.

These are the questions a Dorking householder is likely to bring, answered from the town's own facts.