How Much Does a Roof Lantern Cost? (Cheltenham Prices 2026)

As an indicative 2026 UK guide, a supplied-and-fitted roof lantern typically costs between £2,000 for a small unit and £8,000 or more for a large, high-specification lantern. The only accurate figure for your project is a fixed written quote, which we provide after a free survey of your roof.

Roof lanterns vary hugely in price because they vary hugely in size, glazing and structure. Below we set out realistic guide ranges, explain what moves the number up or down, and walk through a couple of worked examples so you know roughly where you stand before we visit.

Roof lantern prices at a glance (2026 guide)

• Small lantern (around 1m x 1m): £2,000–£3,200 supplied and fitted
• Medium lantern (around 2m x 1.5m): £3,200–£5,000
• Large lantern (around 3m x 2m): £5,000–£7,500
• Extra-large or premium lantern (4m x 2m+): £7,500–£8,000+

These figures are indicative only. They cover the lantern itself, a builder’s kerb or upstand where needed, flashing, weatherproofing and our installation labour. They do not assume any structural alterations. Your fixed price comes only after we survey the roof.

What affects the cost of a roof lantern

Size and number of bars

The bigger the aperture, the more glass and aluminium framework you need, and larger spans often require extra rafter bars for strength. A wider lantern with more glazing panels naturally sits higher in the range.

Glazing specification

Standard double glazing is the baseline. Upgrades such as solar-control coatings, self-cleaning glass, triple glazing or enhanced acoustic glass all add cost but improve comfort and running costs. We cover this in detail on our energy-efficient skylight page.

The kerb or upstand

A roof lantern sits on a raised kerb. If your builder has already formed one to the correct size, that reduces the work. If not, we can supply and fit an insulated upstand, which adds to the total but ensures a clean, watertight finish.

Roof access and height

A single-storey extension roof that is easy to reach is straightforward. Lanterns at height, awkward access or the need for scaffolding will increase labour and equipment costs.

Finish and colour

Standard powder-coated finishes are included; bespoke or dual colours, slimmer sightlines and premium frame profiles carry a modest premium.

Cost in Cheltenham & the Cotswolds

Across Cheltenham, Gloucester and the surrounding Cotswold villages, the great majority of roof lanterns we price sit on the rear of a single-storey kitchen or dining extension, and most of those land in the £3,200–£5,500 bracket once a sensible glazing spec is included. The pattern we see locally is shaped by housing stock. The 1930s–1970s semis and detached homes around Hatherley, Up Hatherley, Warden Hill and Benhall almost all have generous rear gardens and easy side access, which keeps labour predictable. Newer estates at Bishop’s Cleeve, Brockworth and the edges of Tewkesbury tend to have shallow rear elevations but very straightforward, recently-built flat-roof extensions that are kerb-ready, so the lantern goes on cleanly.

The figure climbs where the property is older or tighter. Regency and Victorian terraces in central Cheltenham — Montpellier, the Suffolks, Tivoli, Pittville — often have rear additions reached only through the house or a narrow side passage, and on those jobs the access, not the lantern, is what nudges the price up. In the Cotswold stone villages towards Winchcombe, Bishop’s Cleeve and out past Cirencester, the lantern itself costs the same, but heritage expectations on the rear can steer you toward a slimmer, more discreet frame profile that carries a small premium.

Conservation areas and listed buildings

Much of central Cheltenham falls within designated conservation areas protecting its Regency and Victorian character, and a roof lantern on a rear extension that is not visible from the street is usually uncontroversial. It is a different matter on the main roof slope of a period or listed property, where you may need consent, and where a roof lantern is often not the right product at all — a low-profile conservation rooflight is frequently the better answer. Building control for the work itself runs through Cheltenham Borough Council in town, Tewkesbury Borough Council out towards Bishop’s Cleeve and Winchcombe, Cotswold District Council around Cirencester, and Stroud District Council to the south. We are happy to flag which regime applies to your address at survey, though consent is always separate from our pricing.

Worked examples

Example 1 — small kitchen extension. A 1.2m x 1.2m double-glazed lantern on an existing kerb, single-storey, easy access. Indicative total around £2,400–£3,000 supplied and fitted.

Example 2 — large open-plan extension. A 3m x 2m lantern with solar-control glazing and a new insulated upstand, single-storey. Indicative total around £5,800–£7,200.

Example 3 — Cheltenham townhouse rear addition. A 2m x 1.5m lantern with solar-control glass on a Tivoli terrace, accessed through the property with limited rear space. Indicative total around £4,200–£5,400, with the access detail rather than the unit driving the upper end.

Again, these are guide figures to set expectations. The accurate number is the fixed written quote we give after surveying your roof.

Ways to keep the cost sensible

• Get the kerb right first. If your builder forms the upstand accurately during the extension, that work does not need repeating.
• Choose glazing that fits the room. Solar-control glass earns its keep on south-facing rooms; you may not need every upgrade everywhere.
• Combine the survey. If you are also considering other rooflights, surveying everything in one visit is more efficient.
• Plan access early. Booking us while scaffolding is still up for other works can avoid a separate hire.
• Pick the frame to suit the setting. A standard finish suits most modern estates; reserve the slimmer heritage profile for where it genuinely matters.

Why the quote matters more than the guide

Every roof is different. Pitch, structure, existing kerb, access and the exact glazing you choose all feed into the real price. That is why we never ask you to commit on a guide figure alone. We carry out a free survey, then issue a fixed written quote with no surprises, and every installation carries our written guarantee on our workmanship.

Learn more about the product and process on our roof lantern installation page, compare the figures with our broader skylight cost guide, or get a quote to receive your fixed price after a free survey.