Skylight installation in Belfast
Installing new skylights — cutting the opening, fitting the unit, flashing it in properly.
Northern Ireland · updated 2026-04-11 · 0 local roofers in directory
Typical cost in Belfast
£740–£2,790
Mid-market: £1,300. Local factor 0.93× national baseline (lower labour/access costs in this region). Ranges are indicative; real quotes vary with scope, access, and materials.
See the full UK roofing cost guide for the methodology and the factors that move a quote up or down.
What the job involves
A new skylight install involves cutting an opening in the roof structure, trimming the rafters, fitting the frame, and flashing it into the surrounding covering. Velux is the dominant UK brand; Fakro and Keylite are credible alternatives at lower price points.
The structural work requires attention to rafter trimming — Building Regulations require any rafter that is cut to be supported by the trimmer either side. A structural calculation is sometimes needed on larger openings.
Belfast — local context
Traditional material: Welsh slate and Bangor-quarried blue-black slate.
Northern Irish planning law and Building Regulations differ from those applying in England and Wales; homeowners should confirm local requirements with the Department for Communities or their district council before starting work.
What changes the price
- Skylight size and brand.
- Whether structural trimming of rafters is needed (usually yes on anything larger than a single rafter bay).
- Interior plasterboard reveal work.
- Scaffold access for the roofer working outside.
Timeline: Usually 1–2 days per skylight.
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Start my quote requestCommon questions
Do I need Building Regulations approval?
Yes, because structural rafters are being cut. A registered roofer or builder can usually notify Building Control or a private approved inspector. Smaller roof windows in existing rafter bays may be simpler; anything larger needs a structural sign-off.
Is Velux worth paying more for?
Velux spares and replacement parts are widely available for 30+ years, which matters when seals and gaskets eventually need replacing. Cheaper brands can be fine if you don’t mind replacing the whole unit when something fails.
What does skylight installation typically cost in Belfast?
A typical skylight installation job in Belfast falls in the £740–£2,790 range, with the middle of the market around £1,300. Belfast’s labour and access factor (0.93× the national baseline) means prices run slightly below the UK average. Actual quotes vary with access, materials, and specifics of the job.
Are there any Belfast-specific things that affect price?
Northern Irish planning law and Building Regulations differ from those applying in England and Wales; homeowners should confirm local requirements with the Department for Communities or their district council before starting work.
How many roofers serve Belfast through this site?
Our directory is still being built out for Belfast. You can still submit a quote request — it will be held for matching once local roofers are onboarded.
Related guides
- How to hire a roofer without getting done
Companies House checks, insurance, trade bodies, contracts, and the Consumer Rights Act.
- What a roof repair should actually cost
Real 2026 UK price ranges by job, and what drives the variance.
- Reading a roof from the ground
Eight checks you can do before phoning anyone.
- All roofers in Belfast
The full directory view for Belfast, across every service.
Independent rankings — no pay-to-rank. See Methodology, Complaints & corrections, Privacy.