Passivhaus and EnerPHit · Northern Ireland
Passivhaus and EnerPHit windows in County Londonderry
Passivhaus and EnerPHit windows across County Londonderry: free survey, written fixed quote, and fitting by installation teams working for us. Towns we cover include Derry, Coleraine and Magherafelt.
Certified-component systems on request, with data for PHPP. Passivhaus is a building standard from the Passive House Institute; EnerPHit is its version for retrofits.
Guide prices across County Londonderry
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 Londonderry
Rules 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.
Planning: 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
You will know exactly what you are buying: the quote states the unit build-up, frame, finish, fitting work and how Building Regulations compliance is handled. On fitting day each opening is replaced and closed up before the team moves on.
- Free survey and a written quote fixed for the specification
- Glass build-up and whole-window U-value on every quote
- Written handover pack at the end of the job
- Guarantees on frames, units and fitting in writing
Questions
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 Passivhaus windows have to be certified?
Not always, but certified components make the certification process simpler. Ask and we will price certified systems.
Do you cover all of County Londonderry?
We arrange surveys and fitting across County Londonderry.
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 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
- Whole-house replacement
- New builds and self-builds
- Period homes and conservation areas
- Flats and apartments
Passivhaus and EnerPHit 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.