Utility and boot room extensions across Carrickfergus
Our design and build teams take on utility room extensions in Carrickfergus, from the first measured survey through planning and building control to the finished room.
- Guide price in CarrickfergusFrom £12,000 inc VAT
- PlanningNI permitted development (rear 3–4 m) or planning
- Build time6–10 weeks on site
- Postcode districtsBT38
Extensions in and around Carrickfergus
Postcode districts we cover around Carrickfergus include BT38. Neighbouring towns we cover include Newtownabbey (6 miles), Larne (9 miles), Belfast (10 miles), Castlereagh (10 miles).
Bangor, County Down, in County Down, is roughly 7 miles from Carrickfergus and also on our list. In Northern Ireland, extension projects follow the NI planning rules and council building control, which we account for from the first survey.
How much does a utility room extension cost in Carrickfergus?
Labour and material costs vary across the UK, so for Carrickfergus we use our Northern Ireland factor (×0.86). The ranges include VAT and exclude design, structural and council fees.
Typical rates in Carrickfergus: £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 |
Try the guide-price tool to see a range for your own size and finish.
Will the council need to approve it?
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.
The planning position for a specific Carrickfergus address depends on its history and any designations, which is why we check it at the first visit.
Building close to a public sewer needs the agreement of NI Water, which we check during design.
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.
Applications are decided by your council, which handles local planning in Northern Ireland.
Is a utility room extension right for your house?
- Kitchens that have run out of space for appliances
- Houses with a side passage or small rear corner
- Busy family homes
Our process, step by step
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
We visit your Carrickfergus home, measure up, talk through what you want and check the planning position.
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
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Your questions about a utility room extension in Carrickfergus
Will my neighbours in Carrickfergus be involved?
If a planning application is needed, the council notifies neighbours. Where work is close to a shared boundary, we agree access and protection with them in writing.
Do I need building regulations approval in Carrickfergus?
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 Carrickfergus, and the guide-price tool gives a range for your own size. After the survey you get a written price before anything is agreed.
Does a utility extension need planning permission?
Often not, if it is single storey and within permitted development limits. We check this for your property.
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 Carrickfergus
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.