Skylights
Flat-roof skylights, roof lanterns, sun tunnels and pitched-roof windows: what they cost fitted, the planning rules, and which type suits your roof.
Most UK skylight installations cost £900–£2,500 per window in 2026, fully fitted. Full breakdown: supply, labour, scaffolding, flat roofs and lanterns.
Updated 3 Jul 2026
Fakro, Keylite, RoofLITE+, Roto and Dakea compared against VELUX on 2026 prices, guarantees and quality — and which alternative fits which job.
Updated 3 Jul 2026
Every custom skylight option for UK homes — flat glass, lanterns, walk-on and structural glazing — with 2026 costs, materials advice and the regs.
Updated 3 Jul 2026
'Velux' is a brand, not a window type — and skylight, rooflight and roof window mean different things in UK trade use. The differences, untangled.
Updated 3 Jul 2026
Every type of skylight for UK homes — roof windows, flat-roof skylights, lanterns and sun tunnels — with 2026 costs and how to choose between them.
Updated 3 Jul 2026
VELUX roof windows last 20–30 years on average, with a 10-year guarantee. What fails first, what's repairable, and when replacement beats repair.
Updated 3 Jul 2026
Estimate your skylight or roof window cost in 10 seconds — by type, size, powered opening, scaffolding and region. Built on 2026 UK trade-guide data.
Most UK skylights don't need planning permission — if they project under 150mm and follow permitted development rules. The exceptions, plus building regs.
Updated 3 Jul 2026
Every VELUX roof window type explained — centre-pivot, top-hung, INTEGRA electric and solar, Cabrio — with size codes and 2026 UK prices.
Updated 3 Jul 2026
Fakro undercuts VELUX by 15–25% at comparable spec, with laminated safety glass as standard. Where each brand wins, with 2026 UK prices.
RoofLITE+ is made by the VELUX Group's own Altaterra — 30–40% cheaper, matching U-values, 10-year guarantee. The catches, explained honestly.
Keylite costs 30–40% less than VELUX, installs faster, and guarantees its PVC windows for 20 years. What you give up — and when you shouldn't.
Fixed, opening, walk-on and dome flat roof windows compared — 2026 fitted costs, upstand rules, glazing choices and the brands worth buying.
Roof lanterns cost £2,000–£5,000+ fitted in 2026, with supply from ~£700. Korniche vs Atlas vs UltraSky, what drives the price, and the flat-glass alternative.
Most 'leaking' skylights aren't leaking — it's condensation. The 60-second diagnosis, the fixes for each cause, and when water really means flashing trouble.
Every habitable loft room needs an escape window: 0.33m² clear opening, 450mm minimum each way, sill 600–1100mm up. The rules, the right windows, the costs.