Flush casement windows · County Antrim
Triple glazed flush casement windows in Belfast
We arrange surveys and fitting of triple glazed flush casement windows in Belfast and the BT1 area, with a written, fixed quote after a free survey.
The neat, period look of timber casements with modern glass. A flush casement window has sashes that close flush with the outer frame instead of overlapping it, copying the look of traditional timber windows.
Winter light and glass choice in Belfast
Winter days in Belfast are short: about 7 h 15 min of daylight on 21 December, with the sun peaking near 12°. That low angle reaches deep into south-facing rooms, so we match the glass to each elevation rather than using one spec for the whole house.
Guide prices in Belfast
| Guide | Supply and fit, inc VAT |
|---|---|
| Small window about 600 x 1000 mm (bathroom, landing) | £845 – £1,095 |
| Medium window about 1200 x 1200 mm (bedroom) | £1,195 – £1,495 |
| Large window about 1800 x 1200 mm (lounge) | £1,795 – £2,195 |
Guide prices. Your written quote after the free survey fixes the price for the specification shown.
Rules for flush casement windows in Northern Ireland
The rules for replacement windows in Northern Ireland are set by Technical Booklet F1 (2022): 1.6 W/m²K, or a Window Energy Rating of band C or better. 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 from Belfast
Can flush casements be triple glazed?
Yes. The frame depth and hardware are chosen for the unit weight; we confirm the exact unit on your quote.
Will they be accepted in a conservation area?
Flush designs are often the closest match to original timber windows, but each council decides. See our conservation guide and check any Article 4 direction.
Do I need permission for triple glazed flush casement windows in Belfast?
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. Check whether your street is in a conservation area or covered by an Article 4 direction before changing the style.
Do you fit triple glazed flush casement windows in Belfast?
Yes. We arrange surveys and fitting in Belfast and across County Antrim. Send your postcode and the windows or doors you want replaced, and we will book a free survey.
Nearby
Nearby towns on our list include Castlereagh (4 km), Newtownabbey (7 km), Holywood (8 km) and Lisburn (11 km).
Other products in Belfast
- uPVC windows
- Aluminium windows
- Timber windows
- Alu-clad timber windows
- 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
- Whole-house replacement
- New builds and self-builds
- Period homes and conservation areas
- Flats and apartments
- Passivhaus and EnerPHit
Flush casement windows in Belfast: book your free survey
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.