Cost of Skylights for a Loft Conversion in Cheltenham

As an indicative 2026 UK guide, skylights for a loft conversion typically cost £900 to £2,200 per window supplied and fitted, with most converted rooms taking two or three. For a full room, budget indicatively £2,400 to £6,000. These are guide ranges only — the only accurate figure is a fixed written quote after a free survey.

Skylights are what make a loft conversion feel like a proper room rather than an attic. They bring in far more daylight than a vertical window of the same size, and they keep the floor plan free. Here is what to budget and what moves the price.

Indicative 2026 per-window prices

• Standard centre-pivot roof window: £900–£1,500 fitted
• Larger or top-hung window: £1,400–£2,200 fitted
• Electric / solar-powered with blinds: add £300–£700 per window

We install VELUX products among others, and the model and operation you choose affect the figure.

What affects loft skylight cost

Number and size of windows

Most converted lofts take two to three roof windows to feel bright and balanced. Bigger glass and larger formats bring more light but cost more, both in unit and in the rafter work to frame the opening.

Manual versus powered

Manual windows are the most economical. Electric and solar-powered options — handy for windows you cannot easily reach — add to the cost, as do integrated blinds and rain sensors that close the window automatically.

Glass and comfort

Good solar-control glazing is worth specifying in a loft, where rooms can overheat in summer. Enhanced acoustic glass also helps under a rain-prone roof. Both add modestly to the unit price.

Roof structure and finish

Forming the opening, lining it neatly and finishing the reveals is part of the cost. A straightforward rafter layout keeps it predictable; awkward structure adds labour.

Worked example

A typical loft bedroom with two manual centre-pivot windows and solar-control glass might land indicatively around £2,600 fitted. Step up to two larger electric windows with blinds and you are nearer £4,800.

Ways to save

• Choose manual windows where you can reach the handle comfortably.
• Fit during the conversion build while access and rafters are already open.
• Standardise sizes across the room to simplify the openings.
• Prioritise solar-control glass over extra gadgetry if budget is tight — comfort matters more than features.

Loft skylights and Cheltenham roof types

Loft conversions are popular across Cheltenham and the surrounding towns precisely because they add a room without extending the footprint — valuable on the tighter plots of central Cheltenham and the older streets of Gloucester. But the roof you are working with makes a real difference to both cost and what is possible, and Gloucestershire offers a wide spread.

Regency mansards and period roofs

Central Cheltenham’s Regency terraces often carry mansard or steeply pitched roofs, and many already have loft space crying out for proper roof windows. These are some of the most rewarding conversions for daylight, but also the ones where appearance from the street matters most. On a mansard visible from the road, a conservation-style or heritage roof window — slimmer, often with a flatter external profile — sits far more sympathetically than a standard unit, and may be expected in a conservation area. That specification adds modestly to the per-window cost but is usually the right call on a period property.

Cotswold stone slate roofs

Out in the Cotswold villages and parts of Stroud, Cirencester and Winchcombe, you find traditional stone slate roofs. Cutting a clean opening into stone slate is more involved than into modern tiles or interlocking concrete, and the finish around the window needs care to look right and stay watertight. That craftsmanship is part of the cost on these roofs, and it is worth doing properly — a poorly flashed window in a stone roof is a leak waiting to happen in a wet Cotswold winter.

Modern estate roofs

On the newer estates around Bishop’s Cleeve, Up Hatherley, Warden Hill and Tewkesbury, roofs are typically straightforward interlocking tiles with regular rafter spacing. These are the most predictable and economical to work with — openings are quick to form and line, and standard roof windows fit neatly — so a modern-estate loft conversion tends to sit at the lower end of the per-window ranges above.

Conservation areas and planning for loft windows

Roof windows are usually permitted development, but conservation areas and listed buildings change that. Across central Cheltenham, Winchcombe and the Cotswold villages, the position, projection and style of a roof window on a street-facing elevation can be controlled, and on a listed building consent may be needed. Building control oversight follows location too: Cheltenham Borough Council for the town, Tewkesbury Borough Council for the northern villages, Cotswold District Council for the south-eastern villages, and Stroud District Council for the valleys. A loft conversion as a whole almost always needs building regulations sign-off in any case — the windows are simply one part of that — and we make sure the glazing specification meets the relevant requirements, including any fire-escape window where the conversion needs one.

Escape and ventilation

One point specific to loft conversions: regulations often require at least one roof window sized to act as a means of escape, and bedrooms need adequate ventilation. These are not optional extras — they shape which model goes where, and we factor them into the layout and the quote rather than leaving you to discover them later.

We will measure your roof, advise on the right number and type of windows, and give you a fixed written quote with our written guarantee on our workmanship. For the full service, see our loft conversion skylight installation page, our skylight replacement service if you are updating existing roof windows, and our scaffolding and access cost guide for the height-work side of a two-storey conversion.