Passivhaus and EnerPHit · Northern Ireland
Passivhaus and EnerPHit windows in County Down
Passivhaus and EnerPHit windows across County Down: free survey, written fixed quote, and fitting by installation teams working for us. Towns we cover include Bangor, Castlereagh and Downpatrick.
Low-energy triple glazed windows installed to your designer’s details. Passivhaus is a building standard from the Passive House Institute; EnerPHit is its version for retrofits.
Guide prices across County Down
uPVC low-energy window
medium, deep frame, Uw about 0.8 or better
£1,395 – £1,795inc VAT · £1,160 – £1,495 ex VAT
- Deep multi-chamber frame
- Airtightness tapes and insulated fixing
- Installation details recorded
Timber low-energy window
medium, thermally broken
£2,395 – £2,995inc VAT · £1,995 – £2,495 ex VAT
- Engineered timber, deep section
- Airtightness tapes and insulated fixing
- Installation details recorded
Alu-clad timber low-energy window
medium, certified-component systems on request
£2,695 – £3,395inc VAT · £2,245 – £2,830 ex VAT
- Timber inside, aluminium outside
- Airtightness tapes and insulated fixing
- Installation details recorded
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 Down
Rules in Northern Ireland
In Northern Ireland, replacement windows must meet 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
We start with a survey, not a sales pitch: measurements, the structure above any bays, trickle-vent needs and escape windows. The quote that follows fixes the price, and anything unexpected on the day is agreed with you first.
- 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
Do Passivhaus windows have to be certified?
Not always, but certified components make the certification process simpler. Ask and we will price certified systems.
What is EnerPHit?
The Passive House Institute’s standard for retrofitting existing buildings, with slightly relaxed targets compared with new Passivhaus builds.
Can you fit to my designer’s details?
Yes. We agree position, fixings and airtightness details with your designer before ordering.
Do you cover all of County Down?
We arrange surveys and fitting across County Down.
Do I need permission for Passivhaus and EnerPHit windows 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.
Passivhaus and EnerPHit in nearby areas of Northern Ireland
Other products in County Down
- 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
- Whole-house replacement
- New builds and self-builds
- Period homes and conservation areas
- Flats and apartments
Passivhaus and EnerPHit across County Down
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.