Roof lanterns in County Londonderry: the essentials
Our roof lanterns service in County Londonderry covers hipped glass lanterns that lift the ceiling of orangeries and extensions. We survey every job before fixing the price.
Many Northern Irish homes have later flat-roofed kitchen extensions where an old dome can be swapped for glass. Conservation areas and listed buildings in Northern Ireland are excluded from householder permitted development, so we check before quoting.
Towns in County Londonderry
Specification options in County Londonderry
- Solar-control or self-cleaning glass
- Opening vents with electric control
- Aluminium or uPVC systems
- LED lighting in the plaster box
- Rectangular, square or bespoke sizes
- Light from every angle across the day
- Adds visual height to a single-storey room
Planning and building rules in Northern Ireland
Northern Ireland's householder permitted development allows rooflights within limits — no more than 15 cm projection on road-facing slopes and a 0.5 m margin from ridge, eaves and party walls. 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.
For homes in Northern Ireland, Technical Booklet F1 sets 1.6 W/m²K (or WER Band C) for replacement glazing including rooflights. Extensions follow a 25% glazing allowance in Technical Booklet F1.
What do roof lanterns cost in County Londonderry?
These are typical supply-and-fit ranges. For an address in County Londonderry, scaffold, a hoist for heavy glass, or a new structural opening can move the figure, which is why we survey first.
| 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 |
How the job runs
- Tell us about the roof. Send the postcode, rough sizes and a photo or two through the form, WhatsApp or the guide-price tool.
- Free survey. For new installations a surveyor measures the opening, checks the roof build-up and talks through glass and options.
- Fixed written quote. You get the product, the work and the price in writing. Nothing is ordered or paid for until you agree.
- Fitting and handover. We fit, seal and make good, then hand over product data, warranties and any certificate paperwork.
Roof lanterns in nearby areas
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.
Do roof lanterns get hot?
They can in summer if clear glass is used on a south-facing roof. Solar-control glass and an opening vent make a big difference.
Roof lantern or flat rooflight?
A lantern adds height and sky from all sides; a flat rooflight is lower-profile and cleaner from outside. Our guide compares them in detail.
How big can a lantern be?
Aluminium systems go to around three by six metres in standard ranges; larger sizes are made to order.
Do you fit roof lanterns across County Londonderry?
Yes. We survey and fit roof lanterns across County Londonderry, including Derry/Londonderry, Coleraine, Limavady.
