Derry~Londonderry, County Londonderry
Glazed rear extension in Derry~Londonderry
Full-height glass, slim frames and big rooflights for the most open rear room. If you live in Derry~Londonderry and want to know what a glazed rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
We cover Derry~Londonderry (BT48) as part of our County Londonderry work. If your garden in Derry~Londonderry faces south, expect us to talk about overhangs and solar-control glass before frame colours.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a glazed rear extension cost in Derry~Londonderry?
A glazed rear extension in Derry~Londonderry is priced at £2,440–£4,180 per square metre including VAT as a guide, before kitchen fit-out and fees. Northern Ireland prices are the lowest in our range.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £29,000–£50,000 |
| 4 m wide × 6 m deep (24 m²) | £58,500–£100,000 |
We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
Do you need planning permission for a glazed rear extension in Derry~Londonderry?
The planning route for a glazed rear extension in Derry~Londonderry is set by Northern Ireland's householder rules and your council.
Northern Ireland's permitted development rules allow a single-storey rear extension of 3 metres on terraced and semi-detached houses and 4 metres on detached houses, with a 4 metre height limit. Listed buildings, conservation areas and houses with removed rights need planning permission from the council.
Insulation and glazing follow Technical Booklet F1 in Northern Ireland, checked by council building control.
Conservation areas, Areas of Outstanding Natural Beauty and listed buildings restrict permitted development in Northern Ireland. We check your house's planning history and any conservation area before drawing, so the route is clear before you spend on plans.
What are homes in Derry~Londonderry like to extend?
Semis and detached houses are typical of Derry~Londonderry, and many have room for a rear extension within Northern Ireland's permitted development limits. Glass-led rear extensions in Derry~Londonderry are planned around which way the garden faces, because that decides the glass specification.
How a glazed rear extension in Derry~Londonderry comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Paperwork handled
Planning or permitted development, building control approval, structural design and neighbour agreements are all handled by us.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Glazed rear extensions near Derry~Londonderry
From Derry~Londonderry, the nearest places we also cover are Strabane (13.6 miles) and Limavady (14.7 miles).
- Glazed rear extension in Strabane
- Glazed rear extension in Limavady
- Glazed rear extension in Portstewart
- Glazed rear extension in Coleraine
- Glazed rear extension in Omagh
Other work in Derry~Londonderry:
FAQ
Glazed rear extension questions in Derry~Londonderry
What postcode areas do you cover around Derry~Londonderry?
Including BT48, and the surrounding County Londonderry area.
Do I need a party wall agreement?
Northern Ireland has no Party Wall Act; we agree any shared-wall work with your neighbour in writing.
Will a glass extension be too hot?
Not if it is designed for its orientation, with solar-control glass, shading and ventilation.
Do you handle building control in Derry~Londonderry?
Yes. We apply to the council's building control team and hand over the completion certificate.
Is the site visit in Derry~Londonderry free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.