Cost of Single Storey Extension in Newtownabbey (2026)
Newtownabbey quotes for single storey extension are landing between £1,530 and £2,720 per m² at the moment. Most jobs take 10–16 weeks. The three things that move the price most around Antrim are ground conditions and foundation depth; glazing ratio (bi-folds, roof lights); kitchen refit included.
About single storey extension in Newtownabbey
Newtownabbey is a small town of around 65,000 in Antrim. The housing is mostly Victorian tenements, sandstone terraces and 20th-century estates typical of Scottish and Welsh urban centres. That matters: older properties usually mean more pipework, rewiring and retrofit surprises, while newer builds in districts like BT36, BT37 tend to be quicker jobs with standardised fittings. Local trade prices sit below the UK average. Lower contractor overheads and shorter distances across Antrim do most of the work.
Northern Ireland is typically the cheapest part of the UK for trade services, usually 15 to 20 percent under the national average. Gas Safe and NICEIC operate in NI; a few English schemes don't. Most material supply comes out of Belfast and Lisburn, so rural Fermanagh and Tyrone jobs can wait a day or two on parts.
Building jobs are labour-heavy, and materials have moved fast — brick, timber, steel, insulation and board are all 20 to 40 percent up on pre-2022. FMB and TrustMark are your best signposts for a proper builder. On anything bigger than a loft conversion, get a Building Control officer involved from day one; fixing non-compliance later costs a fortune.
Single Storey Extension cost breakdown in Newtownabbey
Simple rear extension with standard finish
Open-plan kitchen extension with bi-fold doors
Wrap-around or glazed extension with lantern roof and structural steels
What affects the price of single storey extension in Newtownabbey?
- Ground conditions and foundation depth
- Glazing ratio (bi-folds, roof lights)
- Kitchen refit included
- Structural steels and knock-through
- Planning permission vs PD
Newtownabbey vs the UK average
Newtownabbey sits in the building & construction market at a cost multiplier of 0.85× the UK national average. That puts Newtownabbey single storey extension prices at £1,530–£2,720 versus the UK average of £1,800–£3,200 per m².
Single Storey Extension cost calculator — Newtownabbey
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What's typically included in a single storey extension quote
- Foundations and drainage
- Brick and block shell
- Roof and glazing
- First and second fix
- Plaster and decoration
Frequently asked questions
How much does single storey extension cost in Newtownabbey?
Budget £1,530 to £2,720 per m² for single storey extension in Newtownabbey. Prices here are around 15% cheaper than the UK average. What moves a quote inside that range is mostly building contractor day rates in Antrim and the specific material list for your job.
How long does single storey extension take in Newtownabbey?
A straightforward single storey extension job in Newtownabbey runs to 10–16 weeks. You can lose days to things outside the contractor's control — parts on backorder, awkward access, or a firm slotting your job around existing bookings. Ask for a start date and expected finish up front.
What's included in the price of single storey extension in Newtownabbey?
A proper single storey extension quote in Newtownabbey should cover: Foundations and drainage; Brick and block shell; Roof and glazing; First and second fix; Plaster and decoration. If any of those aren't itemised on your quote, push back and ask. A written guarantee with a clear warranty period is reasonable to expect on this kind of work.
Is single storey extension cheaper in Newtownabbey than the UK average?
Single Storey Extension in Newtownabbey runs around 15% cheaper than the UK average. The UK-wide benchmark for this job is £1,800 to £3,200 per m²; Newtownabbey quotes tend to land between £1,530 and £2,720. Handy to know what the average actually looks like before you price round.
Do I need planning permission for single storey extension in Newtownabbey?
Most rear extensions fall under Permitted Development (up to 6m terraced/8m detached with Prior Approval). Side extensions and Article 4 areas require full planning. If the property sits in a conservation area or is listed, ring Antrim Council before you book anything in. It's a free call and saves a world of grief later.
See all single storey extension prices across the UK or browse all tradespeople costs in Newtownabbey.