Coleraine, County Londonderry
Glazed rear extension in Coleraine
Full-height glass, slim frames and big rooflights for the most open rear room. If you live in Coleraine 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 Coleraine (BT52) as part of our County Londonderry work. Glass-led rear extensions in Coleraine are planned around which way the garden faces, because that decides the glass specification.
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 Coleraine?
Guide prices for a glazed rear extension in Coleraine start from our Northern Ireland rate of £2,440–£4,180 per square metre, including VAT. 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 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a glazed rear extension in Coleraine?
Whether your glazed rear extension in Coleraine needs a planning application depends on its size, your house and any local restrictions.
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. At the first visit we measure what is there now and tell you which route fits: permitted development or a planning application.
What are homes in Coleraine like to extend?
Coleraine has terraces near the centre, semis on the edges and many detached houses and bungalows in the surrounding countryside, where plots are often generous.
How a glazed rear extension in Coleraine 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.
Design and guide price
Two or three layout options with a guide price for each, so you choose the design knowing what it costs.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for council building control.
Build and sign-off
We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.
Glazed rear extensions near Coleraine
From Coleraine, the nearest places we also cover are Portstewart (3.8 miles) and Limavady (12.6 miles).
- Glazed rear extension in Portstewart
- Glazed rear extension in Limavady
- Glazed rear extension in Ballymena
- Glazed rear extension in Magherafelt
- Glazed rear extension in Derry~Londonderry
Other work in Coleraine:
FAQ
Glazed rear extension questions in Coleraine
How much does a glazed rear extension cost in Coleraine?
As a guide, £2,440–£4,180 per square metre including VAT for a standard specification. For example, 3 m wide × 4 m deep (12 m²): about £29,000–£50,000 at that rate. Your written price follows the survey.
Do I need planning permission for a rear extension in Coleraine?
Often not for a single-storey rear extension of up to 3 metres (4 metres detached) under Northern Ireland's permitted development rules, outside conservation areas.
Sliding or bifold doors?
Sliders give bigger panes and slimmer sightlines; bifolds open the whole width. Our guide compares them.
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.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
Is the site visit in Coleraine free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.