Internal windows and borrowed light in Northern Ireland
If you're planning internal windows and borrowed light anywhere in Northern Ireland, we can survey, supply and fit the whole job, and give you a fixed written price first.
- Free survey anywhere in Northern Ireland
- Fixed written price before anything is ordered
- £450–£800 per m² plus VAT, fitted (guide)
Free survey in Northern Ireland
Tell us about the space. We'll call back within one working day to book a survey.
About internal windows and borrowed light
An internal window is a fixed glazed panel set into an internal wall to borrow daylight from a bright room for a dark one — an inner hallway, a landing, a windowless bathroom or a box room. A glazed fanlight over a door does the same job. Full details on internal windows and borrowed light.
Internal windows and borrowed light for Northern Ireland properties
Much of what we fit in Northern Ireland goes into red-brick terraces in Belfast, Victorian villas along the Malone Road and coastal homes in County Down. The survey is where we spot the things that change a price — a sloping floor, a hidden pipe, a wall that needs a lintel — so there are no surprises later. We also work for local businesses, including offices across Belfast city centre and the Titanic Quarter.
Cost and lead time in Northern Ireland
Most internal windows and borrowed light jobs in Northern Ireland fall between £450–£800 per m² plus VAT, fitted. Try the guide-price tool for your size, then book a survey for a fixed quote. Surveys are booked across the BT postcode areas. Lead time is typically 3–5 weeks from survey.
Building Regulations and safety
Glass within 800mm of the floor must be safety glass. Cutting into a masonry wall may need a lintel and, if the wall is load-bearing, structural calculations; stud walls are usually straightforward.
Questions from Northern Ireland customers
How much do internal windows and borrowed light cost in Northern Ireland?
As a guide, £450–£800 per m² plus VAT, supplied and fitted, with the fixed price confirmed after a free survey.
How long does it take to get internal windows and borrowed light fitted in Northern Ireland?
Lead time is typically 3–5 weeks from survey. We'll give you a firm date when you approve the drawing.
Will people be able to see through it?
Choose reeded, satin or acid-etched glass for privacy — it still passes most of the light.
Ready to see what glass could do for your space?
Book a free survey or get an instant guide price online. No obligation, and your quote is fixed in writing.