Roof lanterns in Barnet: what is involved?
For Barnet homes and buildings we offer roof lanterns: hipped glass lanterns that lift the ceiling of orangeries and extensions. We measure first, specify to the opening and confirm any planning or building-control points before quoting.
Mansard and loft conversions are common across London, and roof windows are often set out alongside dormers on the rear slope. Think of roof lanterns for orangeries, kitchen-diners and single-storey extensions.
Barnet is around 17 km from central London, and we survey and fit throughout that part of Greater London, including the EN5 district.
Specification options
- LED lighting in the plaster box
- Solar-control or self-cleaning glass
- Internal and external colours
- Aluminium or uPVC systems
- Rectangular, square or bespoke sizes
- Slim aluminium bars, more glass
- Classic look that suits period and modern homes
What to check first
- Larger lanterns may need a steel or timber ring beam
- Needs a strong, level kerb or upstand
Planning and building rules for Barnet
English householder permitted development (Class C) normally covers rooflights that stand no more than 0.15 m proud of the roof plane and stay below the highest part of the roof. A rooflight on a side-facing slope must be obscure-glazed, and fixed shut unless the opening part is more than 1.7 m above the floor.
For English homes the energy rules ask for rooflights of 2.2 W/m²K or better and roof windows of 1.4 W/m²K (or WER Band B); most modern double glazed units meet both. In an extension, glazing including rooflights is normally limited to 25% of the new floor area plus any windows or doors the extension covers, unless a whole-house calculation shows otherwise.
Our planning guide covers each nation in more detail.
Roof lanterns prices in Barnet
These are typical supply-and-fit ranges. For an address in Barnet, 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 |
From enquiry to finished job
- Send the details. Postcode, rough size and a photo of the roof and room.
- Free site visit. For new installs we survey free, measure and confirm the roof detail.
- Agree the quote. You approve the specification and price before anything is ordered.
- Fitting and handover. We install, clean down and leave product and warranty documents.
Neighbouring towns
Other services in Barnet
Questions about roof lanterns in Barnet
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 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.
How do I book a survey in Barnet?
Send your postcode and, if you can, a photo of the roof and the room. We offer a survey date when we reply.
Do I need to be at home for the survey in Barnet?
Yes — someone needs to let us into the room below and, where possible, show us how the roof is reached.
