Sliding rooflights for Castlereagh: the essentials
Thinking about sliding rooflights in Castlereagh? The short answer: box rooflights whose glass lid slides back for walk-out roof access. The longer answer depends on your roof, which is why we survey before we price.
Conservation areas and listed buildings in Northern Ireland are excluded from householder permitted development, so we check before quoting. Sliding rooflights suit staircases that rise to a roof terrace.
From Castlereagh to Belfast, Newtownabbey and Lisburn, the same survey-first process applies: measure, specify, fix the price, then fit.
Choices for your Castlereagh project
- Electric drive with safety edge
- Box (glazed sides) or flat sliding lid
- Integrated balustrade on some ranges
- Anthracite, black or RAL frames
- Double or triple glazing
- Replaces a dormer or stair enclosure on some roofs
- Full-width, walk-out access to a roof terrace
Before you order: points to check
- Electric units need a dedicated supply and commissioning
- Weight and point loads need a structural check
Consents for sliding rooflights in Castlereagh
Most rooflights on houses in Northern Ireland are permitted development under Class B, but not in a conservation area or on a listed building's curtilage. Listed buildings also need listed building consent from the council.
Technical Booklet F1 (2022) asks for replacement windows and rooflights in existing homes to reach WER Band C or a U-value of 1.6 W/m²K, assessed in the vertical position. New dwellings must average 1.40 W/m²K across windows, roof windows and rooflights.
Read the planning permission guide before you commit to a design.
Guide prices for Castlereagh
Prices below are shown including and excluding VAT. In Castlereagh, as elsewhere, making good inside and access equipment are the main variables.
| Option | Guide price inc VAT | Ex VAT |
|---|---|---|
| Large box slider with electric drive | £11,995 – £20,395 | £9,995 – £16,995 |
| Standard box slider Typical | £8,995 – £13,195 | £7,495 – £10,995 |
| Flat sliding lid | £7,195 – £9,595 | £5,995 – £7,995 |
From enquiry to finished job
- Send the details. Postcode, rough size and a photo of the roof and room.
- Survey. We measure the opening, check the roof build-up and agree the options.
- Agree the quote. You approve the specification and price before anything is ordered.
- Fit and make good. We fit, seal, test and finish the reveal, then hand over the paperwork.
Nearby towns
Other services in Castlereagh
Questions about sliding rooflights in Castlereagh
How heavy is it?
Box sliders weigh hundreds of kilograms, so delivery may need a crane or lifting gear, and the structure must be checked.
Does it need planning permission?
A box unit that projects above the roof plane can need planning permission, especially on the front of a house or in a conservation area. We check before you order.
Can children open it?
Controls can be key-switched or placed out of reach. We will set the controls up to suit the household.
Will I need planning permission in Castlereagh?
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.
Do you fit sliding rooflights in Castlereagh?
Yes. We survey and fit sliding rooflights in Castlereagh and across County Down. Send your postcode and we will offer a survey date when we reply.
