Roof lanterns for Belfast: the essentials
Roof lanterns in Belfast means hipped glass lanterns that lift the ceiling of orangeries and extensions. We cover the BT1 district and the rest of County Antrim, with a survey before any price is fixed.
Northern Ireland has a mix of terraces, bungalows and rural farmhouses, and rooflights are a common upgrade when extending. Typical uses for roof lanterns include orangeries, kitchen-diners and single-storey extensions.
We cover all of Belfast and the BT1 district, and nearby Castlereagh and Newtownabbey.
Specification options
- Solar-control or self-cleaning glass
- LED lighting in the plaster box
- Rectangular, square or bespoke sizes
- Aluminium or uPVC systems
- Opening vents with electric control
- Classic look that suits period and modern homes
- Slim aluminium bars, more glass
What to check first
- Plaster-box depth affects how the lantern looks from below
- Larger lanterns may need a steel or timber ring beam
Do you need permission in Belfast?
In Northern Ireland, roof alterations come under Class B of the 2015 order: a rooflight facing a road must not project more than 15 cm and must sit at least 0.5 m from the ridge, eaves, verge and party wall. A side-facing window within 15 m of a neighbouring boundary must be obscure-glazed, and non-opening unless the opening part is more than 1.7 m above the floor.
Northern Ireland's energy rules assess rooflight U-values in the vertical position — unlike England and Wales — and expect 1.6 W/m²K or Band C for replacements. Extensions follow a 25% glazing allowance in Technical Booklet F1.
See our building regulations guide for U-values, glazing limits and self-certification.
What do roof lanterns cost in Belfast?
Prices below are shown including and excluding VAT. In Belfast, as elsewhere, making good inside and access equipment are the main variables.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large or bespoke aluminium lantern | £5,995 – £10,795 | £4,995 – £8,995 |
| Mid-size aluminium lantern (2 × 3 m) Typical | £3,955 – £5,995 | £3,295 – £4,995 |
| Small lantern (1 × 2 m) | £2,995 – £3,955 | £2,495 – £3,295 |
The process, step by step
- Get in touch. Use the form, WhatsApp or the guide-price tool with your Belfast address.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Written price. You receive a fixed price listing the unit, the work and the lead time.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Roof lanterns near Belfast
Related work in Belfast
Common questions
Do they leak?
Modern lanterns are sealed systems. Leaks usually trace back to the kerb or roof membrane detail, which we form and check ourselves.
Aluminium or uPVC?
Aluminium gives slimmer bars and a longer life; uPVC costs less. We fit both.
Can a lantern go on an existing extension?
Yes, if the flat roof structure can be opened up and trimmed. We check joists and the roof build-up at survey.
Do you fit roof lanterns in Belfast?
Yes. We survey and fit roof lanterns in Belfast and across County Antrim. Send your postcode and we will offer a survey date when we reply.
Can you work alongside my builder in Belfast?
Yes. On new extensions we fit once the opening and upstand are ready and coordinate dates with your builder.
