Whole-house replacement · Northern Ireland
Whole-house triple glazing in County Londonderry
We survey and fit whole-house triple glazing across County Londonderry, from Derry and Coleraine to smaller towns such as Magherafelt.
Whole-house guide prices for 2-, 3- and 4-bed homes. Whole-house triple glazing means replacing every window, and usually the external doors, in one job.
Guide prices across County Londonderry
2-bed terrace
5 windows + front door
£5,695 – £7,195inc VAT · £4,745 – £5,995 ex VAT
- White uPVC, triple glazed
- All old frames removed and taken away
- One fitting team, usually 1 to 2 days
3-bed semi
9 windows + front door
£9,395 – £11,795inc VAT · £7,830 – £9,830 ex VAT
- White uPVC, triple glazed
- All old frames removed and taken away
- Usually 2 to 3 days on site
4-bed detached
12 windows + front door + French doors
£13,595 – £16,995inc VAT · £11,330 – £14,160 ex VAT
- White uPVC, triple glazed
- All old frames removed and taken away
- Usually 3 to 4 days on site
Guide prices, supply and fit. The written quote after your survey fixes the price for the specification shown; anything extra is agreed with you first.
Towns in County Londonderry
Rules in Northern Ireland
Northern Ireland requires replacement windows to achieve 1.6 W/m²K, or a Window Energy Rating of band C or better, which good triple glazing passes comfortably. Replacing windows or external doors does not need full plans or a building notice, but the work must still comply; enlarging an opening or other structural change needs building control approval.
Before ordering: Check with your council planning office before changing the style, material or size of windows or doors, and always for listed buildings, conservation areas and flats.
How it works
The surveyor measures every opening, checks ventilation, escape windows and safety-glass zones, and talks through styles. Your written quote lists each item with its glass build-up and U-value, and the price is fixed for that specification.
- Guide prices published, not hidden
- No pressure: the quote is yours to keep
- Frames, glass and fitting in one contract
- Advice on planning and consents before you order
Questions
Will I need scaffolding?
Most two-storey homes can be done from ladders or towers. Where scaffolding is needed, it is quoted separately.
Do I need to move out?
No. We work room by room and make each opening weathertight the same day.
How long does a whole-house installation take?
Usually 1 to 2 days for a small house and 2 to 4 days for a larger one.
Do you cover all of County Londonderry?
We arrange surveys and fitting across County Londonderry.
Do I need permission for whole-house triple glazing in Northern Ireland?
In Northern Ireland, check with your council planning office before changing the style, material or size of windows, and always for listed buildings and flats.
Whole-house replacement in nearby areas of Northern Ireland
Other products in County Londonderry
- uPVC windows
- Aluminium windows
- Timber windows
- Alu-clad timber windows
- Casement windows
- Flush casement windows
- Tilt and turn windows
- Sash windows
- Bay and bow windows
- Fixed and picture windows
- Composite front doors
- French doors
- Sliding patio doors
- Bifold doors
- Glass-only replacement
- Acoustic triple glazing
- Security glazing
- New builds and self-builds
- Period homes and conservation areas
- Flats and apartments
- Passivhaus and EnerPHit
Whole-house replacement across County Londonderry
Written quote fixed for the specification, after a free survey. No building notice is needed for a straight replacement in Northern Ireland; we fit to the regulations and give you a written handover pack.