Utility and boot room extensions in Colwyn Bay
Thinking about a utility room extension for your Colwyn Bay home? Start with a free site visit: we measure up, check what the council will allow and give you honest guide figures on the day.
- Guide price in Colwyn BayFrom £13,000 inc VAT
- PlanningWelsh permitted development rules (rear up to 4 m)
- Build time6–10 weeks on site
- Postcode districtsLL28, LL29

Will the council need to approve it?
In Wales a single-storey rear extension can usually project up to 4 m beyond the rear wall without a planning application, if it is no more than 4 m high, keeps eaves to 3 m and overall height to 4 m within 2 m of a boundary, and covers no more than half the land around the original house. Wales has no larger home extension prior approval scheme.
The planning position for a specific Colwyn Bay address depends on its history and any designations, which is why we check it at the first visit.
Building regulations approval is separate from planning. Wales has its own building regulations and approved documents; the council or a registered building control approver checks the plans, inspects the work and issues a completion certificate.
Applications are decided by the local planning authority (your county or county borough council, or the national park authority).
What should I budget for a utility room extension in Colwyn Bay?
These guide figures apply our Wales adjustment (×0.93) to national rates. They include VAT at 20% and cover the build itself; design and council fees are listed separately.
Typical rates in Colwyn Bay: £1,770 to £3,260 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| 2 m × 2.5 m 5 m² | £13,000 – £15,500 | £13,000 – £16,500 | £13,000 – £16,500 |
| 2.5 m × 3.2 m 8 m² | £14,000 – £17,000 | £16,500 – £21,000 | £20,500 – £26,500 |
| 3 m × 3.6 m 11 m² | £19,000 – £23,500 | £23,000 – £29,000 | £28,500 – £36,000 |
Try the guide-price tool to see a range for your own size and finish.
Working in Colwyn Bay
Our survey diary covers Colwyn Bay, including LL28, LL29. We also work in nearby Llandudno (5 miles), Rhyl (10 miles), Prestatyn (13 miles), Flint (25 miles).
Just over the Gwynedd border, Bangor, Gwynedd is about 17 miles away. Welsh housing ranges from stone terraces in the valleys to render-and-slate houses and modern estates, and the Welsh planning rules differ from England's in several places.
Included in a typical project
- Design around appliances, sink and storage
- Waste and water connections
- Ventilation for a tumble dryer
- Back door and a hard-wearing floor
- Built-in storage or space ready for your units
What happens next
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 Colwyn Bay home, measure up, talk through what you want and check the planning position.
Design and approvals
Drawings are prepared and agreed with you, then submitted for the right planning route and building regulations approval.
Fixed written price
The price is fixed in writing once the design is settled, with a clear programme and payment stages.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions people ask about utility room extensions
Who do I contract with for a utility room extension in Colwyn Bay?
Your contract is with S&K Property Investments and Improvement Ltd, which designs and manages the project and the build teams who carry it out.
How long does a utility room extension take to build in Colwyn Bay?
On site, typically 6 to 10 weeks once approvals are in place. Before that, allow 4–10 weeks design and approvals.
Will my neighbours in Colwyn Bay be involved?
If a planning application is needed, the council notifies neighbours. If the work is on or near a shared boundary, party wall notices may also be needed.
Can a utility have a toilet?
Yes, space permitting. A WC needs drainage and extraction, which we plan into the design.
How much does a utility room extension cost?
Our guide range is about £1,770 to £3,260 per m² including VAT, with a minimum of around £13,500. An 8 m² standard-spec utility is typically £16,500 to £21,000 in Colwyn Bay.
Book a free site visit in Colwyn Bay
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.