Fit-onlySupply & fitReplacementsTrade fitting
Fitting teams across England, Wales, Scotland & NI · Call 0800 088 6248
RooflightInstallers.co.uk
Milton Keynes · MK9 · Buckinghamshire

Sun tunnel installation in Milton Keynes

Rooflight work is weather work. Membranes, primers and sealants all want a dry surface, so a fitting day in Milton Keynes is planned around the forecast rather than pinned to a date regardless of rain. The opening is kept covered whenever it is exposed, and a roof is not left open overnight without a proper temporary seal. That approach applies to every sun tunnel we install, from a new opening to a straight swap or a fit-only job. We cover Milton Keynes, the MK9 district and the rest of Buckinghamshire.

Guide price from £595 · Supply & fit

Milton Keynes guide prices

Short rigid tube

£595 – £845including VAT at 20%

Around 250 mm tube, short straight run through a loft

Wider or longer run

£845 – £1,145including VAT at 20%

Around 350 mm tube or longer runs with bends

Flat roof or complex

£1,145 – £1,745including VAT at 20%

Flat roof kits, long runs or two tubes

Guide ranges for supply & fit. 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.

Areas around Milton Keynes we cover

Looking at a property near Milton Keynes but not quite in it? We work across MK9, MK6 and MK14 and outwards to Newport Pagnell, Bletchley and Leighton Buzzard. Give us the full postcode when you get in touch, because access, parking and the route for a large unit all depend on the exact street. Those details shape the quote for any job around Milton Keynes.

Your sun tunnels or ours

Supply and fit tends to suit people who would rather not pick a unit from a catalogue. We look at the roof, the opening and how you use the room, then put a sun tunnel on the quote that fits all three. Fit-only suits people who already know what they want, or have one on site. We are happy with either. The difference is who stands behind what: on fit-only, the maker or retailer covers the product, and our workmanship guarantee covers the installation.

What we do on the day

  • Rigid or flexible tube run and joined, with as few bends as possible
  • Ceiling opening cut neatly and the diffuser fitted
  • Roof opening cut and the flashing fitted to tiles, slates or a flat-roof kit
  • Flat or pitched roof kit — We confirm the roof type and covering before ordering the kit.
  • Length and bends in the tube — We plan the shortest, straightest route we can between the roof and the ceiling.

A typical installation day

Fitting days start with a look at the sky. If rain is due, the order of work changes so the roof is never left open to it. A typical day for a sun tunnel runs like this: set up access, protect the room, open up the roof or prepare the existing kerb or frame, check sizes, fix, seal, then finish inside. On jobs that take more than a day, the opening is weather-sealed overnight. The last hour goes on tidying, waste removal and a walk-round with you.

Planning, building control and Milton Keynes

England's rules in short: permitted development usually covers a rooflight on a house roof provided it doesn't stick out more than 0.15 m or rise above the ridge, though a listed building always needs consent and some streets have Article 4 directions. Building regulations apply to new openings, and replacements go through building control; as we are not registered with a competent person scheme, we use a building notice and show the fee on the quote. The energy limit for rooflights in existing homes is 2.2 W/m²K, and the 2026 Approved Document L, in force from 24 March 2027, keeps that figure.

Getting a price from photos

Each detail you send takes a question off our list. Photos inside and out show the opening and the ceiling. Rough measurements tell us the unit size. The roof covering tells us how it will be sealed in. Access notes tell us whether a tower or scaffold is needed. A product link, if you have one, lets us check it against the opening. Your postcode, MK9 or nearby, confirms travel.

Common questions in Milton Keynes

Do you make good inside after fitting?

Yes, where the quote includes it. Internal finishing usually means lining the reveal with plasterboard, taping or skimming, and fitting trim where it meets the ceiling. Some people prefer their own plasterer or decorator to finish off, which is fine. The written quote spells out exactly where our work stops, so nobody is left guessing about who does what once the unit is in.

How long does fitting take?

Fitting a sun tunnel into an existing, correctly sized opening is often a day's work. New openings take longer, because joists or rafters need trimming, an upstand or flashing has to be built or fitted, and the inside needs finishing. Large units that need lifting gear, and days lost to rain, can stretch things further. Your written quote gives a realistic estimate for your roof.

Will my new sun tunnel leak?

A correctly fitted unit should not. Leaks usually trace back to the detail around the frame: an upstand that is too low, a membrane or flashing that is not dressed properly, sealant applied to a damp surface, or water ponding against the kerb. We fit to the maker's instructions and check each of those points. The fitting carries a written workmanship guarantee, with its terms set out on your quote.

Planning a sun tunnel in Milton Keynes? Tell us about the roof and we will come back with a clear price in writing.

Rear extension at dusk with lit rooflights and a roof lantern
Ready when you are

Sun tunnels in Milton Keynes

Send photos and rough sizes, or ask for a survey for install work. One fixed written price before anything starts.

CallGet a quote