Banstead guide prices
Small fixed unit
Opening cut, joists trimmed, upstand built, roof covering made good, plasterboard reveals ready for decoration
Medium fixed unit
As the small unit, with a larger opening up to about 1 × 2 m and additional trimming
Large or opening unit
Bigger structural work or an electric opening unit
Guide ranges for supply & fit, including structure and making good; building control or warrant fees extra. Your price is fixed in a written quote after we have seen photos or surveyed. Scaffold, access towers or a crane are priced separately if the job needs them, and building control fees, where a job needs them, are shown as their own line.
Fitting across Banstead and nearby
Fitters travel to the job, so the address is what counts. In Banstead that means postcode districts SM7, KT17 and KT18, and the same teams can just as easily take on work in Sutton, about 2 miles away, or Ewell at roughly 3 miles. Survey and fitting dates are offered according to fitter availability, and travel is built into the quote rather than added later.
Fit-only or supply and fit
There are two ways to do this. Supply and fit means we source a new rooflight that suits your roof and install it, so one company answers for both the product choice and the fitting. Fit-only means you buy the unit and we install it. With fit-only, the product warranty stays with the maker or seller, and our written guarantee covers the fitting work. Both routes get the same checks on the opening, the upstand and the maker's instructions before anything is fixed.
On the day, we cover
- Rooflight fitted, sealed and checked for even clearance on every side
- Insulated upstand built square, level and to the maker's height
- Roof membrane, felt or tiles made good and dressed up the upstand
- Planning for your roof — We check whether the new rooflight falls within permitted development for your house and nation.
- Upstand energy performance — We build the upstand to meet the energy limit for site-built upstands, not just to hold the rooflight up.
From arrival to clean-up
On the day, you need to be in at the start and at the end. In between, the fitters get on with it. They will want the room below cleared where possible, a parking spot if you have one, and somewhere to set the unit down safely. After checking the opening and the upstand or flashing, they fix a new rooflight, seal it and finish the inside. Packaging and any old unit leave with them unless the quote says otherwise.
Planning and building rules in England
In England, a new rooflight opening generally needs building regulations approval because the roof structure is altered and the glazing must meet energy rules: 2.2 W/m²K for a rooflight in an existing home, or 1.4 W/m²K (or WER Band B) for a roof window. Planning is often not needed on a house: permitted development covers rooflights that stand no more than 0.15 m proud of the roof slope and sit below the highest part of the roof. Flats, listed buildings and areas with an Article 4 direction are different, so we check your address first.
Help us quote accurately
Start with your phone. Take a picture of the roof where the unit goes or already sits, then one from inside looking up. Measure what you can, even roughly. Tell us what the roof is covered with and how a fitter would reach it: ladder, garden access or scaffold. Bought it already? Send the link or spec. Add your full postcode, for example in SM7, and we can price it.
Common questions in Banstead
What if my roof opening is the wrong size for the rooflight?
We find out before the fitting day, not on it. If the opening is slightly out, it can usually be adjusted by trimming or by packing out the upstand. If it is a long way off, the choice is between altering the opening and changing the unit. Bear in mind that rooflights are often sold by builder's opening size rather than external size, so check which one your measurement refers to.
How does payment work?
Payment terms are set out on your written quote before you accept it. Depending on the job, that may mean a deposit, stage payments for larger work, or payment on completion. The contract is with S&K Property Investments and Improvement Ltd, part of the S&K Group. Nothing is added without your agreement: if something unexpected comes up, we discuss it and agree any change before carrying on.
Can you fit a rooflight in winter or when it is raining?
Yes, within limits. Cold is less of a problem than wet, because membranes, primers and sealants need a dry surface to bond. We plan fitting days around the forecast and may move a date if heavy rain is due. If the roof has to be opened up, it is not left overnight without a temporary weather seal, so the room below stays dry while the work is finished.
For a free, no-obligation quote in Banstead, use the form or call us with the details of your roof.

