Antrim utility room extensions, designed and built
From the first sketch to final sign-off, we plan and build utility room extensions in Antrim and the surrounding County Antrim area.
- Guide price in AntrimFrom £12,000 inc VAT
- PlanningNI permitted development (rear 3–4 m) or planning
- Build time6–10 weeks on site
- Postcode districtsBT41
Included in a typical project
- Back door and a hard-wearing floor
- Built-in storage or space ready for your units
- Waste and water connections
- Design around appliances, sink and storage
Planning and approvals in Antrim
In Northern Ireland the Planning (General Permitted Development) Order 2015 lets some single-storey rear extensions go ahead without planning permission, up to 3 m on a semi-detached or terraced house and 4 m on a detached house, within height and boundary limits. Larger, side and two-storey extensions normally need planning permission from the council, and building control approval is separate.
Homes in conservation areas, areas of townscape character and listed buildings have tighter rules, so we always check the property's status and planning history before design starts.
In Northern Ireland building control is run by the councils under the Building Regulations (Northern Ireland). We submit full plans or a building notice and book the inspections through to completion.
Building close to a public sewer needs the agreement of NI Water, which we check during design.
Applications are decided by your council, which handles local planning in Northern Ireland.
Guide prices for Antrim
Prices below are for Antrim, using the Northern Ireland factor of ×0.86. They are guide ranges including VAT for the build only, not a quote.
Typical rates in Antrim: £1,630 to £3,010 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| 2 m × 2.5 m 5 m² | £12,000 – £14,500 | £12,000 – £15,000 | £12,000 – £15,500 |
| 2.5 m × 3.2 m 8 m² | £13,000 – £15,500 | £15,000 – £19,500 | £19,000 – £24,500 |
| 3 m × 3.6 m 11 m² | £17,500 – £21,500 | £21,000 – £26,500 | £26,000 – £33,500 |
For a figure based on your own dimensions, use our guide-price tool.
Working in Antrim
Site visits are available across Antrim (BT41). The same team covers Ballymena (10 miles), Newtownabbey (13 miles), Belfast (14 miles), Lisburn (15 miles), all within easy reach.
Just over the County Londonderry border, Magherafelt is about 17 miles away. In Northern Ireland, extension projects follow the NI planning rules and council building control, which we account for from the first survey.
How the project works
Site visits are free and there is no obligation. Where drawings are needed, the design stage is priced in writing before it starts.
Free site visit
A designer visits, takes measurements and photos, and discusses layouts, budget and timing with you.
Design and approvals
We produce the drawings and structural design, and manage the approvals so they are in place before work starts.
Fixed written price
You receive a written, itemised price and programme. Nothing starts until you are happy with it.
Build and sign-off
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Utility room extension questions answered
Do you cover all of Antrim?
Yes. We cover Antrim and the surrounding parts of County Antrim. Site visits are free and there is no obligation.
Do I need building regulations approval in Antrim?
Yes. Almost every extension needs it, whatever the planning route. We prepare the drawings and book the inspections.
Can I see a price before committing to anything?
Yes. The guide prices on this page are adjusted for Antrim, and the guide-price tool gives a range for your own size. After the survey you get a written price before anything is agreed.
How much does a utility room extension cost?
Our guide range is about £1,630 to £3,010 per m² including VAT, with a minimum of around £12,500. An 8 m² standard-spec utility is typically £15,000 to £19,500 in Antrim.
Can a utility have a toilet?
Yes, space permitting. A WC needs drainage and extraction, which we plan into the design.
Book a free site visit in Antrim
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.