Bungalow extensions in Colwyn Bay: design, approvals and build
A bungalow extension in Colwyn Bay starts with the right design and the right approval route. We take care of both, then build it with our own project management.
- Guide price in Colwyn BayFrom £24,000 inc VAT
- PlanningWelsh permitted development rules (rear up to 4 m)
- Build time10–18 weeks on site
- Postcode districtsLL28, LL29
What should I budget for a bungalow extension in Colwyn Bay?
Prices below are for Colwyn Bay, using the Wales factor of ×0.93. They are guide ranges including VAT for the build only, not a quote.
Typical rates in Colwyn Bay: £1,630 to £3,160 per m² including VAT, depending on specification.
| Size | Essential | Standard | Premium |
|---|---|---|---|
| 3 m × 5 m 15 m² | £24,000 – £29,500 | £28,500 – £37,000 | £36,000 – £47,500 |
| 4 m × 6 m 24 m² | £39,000 – £47,000 | £45,500 – £59,500 | £58,000 – £76,000 |
| L-shape 35 m² | £56,500 – £68,500 | £66,500 – £86,500 | £84,500 – £111,000 |
Try the guide-price tool to see a range for your own size and finish.
Working in Colwyn Bay
Site visits are available across Colwyn Bay (LL28, LL29). Nearby, we also take on projects in Llandudno (5 miles), Rhyl (10 miles), Prestatyn (13 miles), Flint (25 miles).
For homes towards Gwynedd, Bangor, Gwynedd is around 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.
Planning rules that apply in Colwyn Bay
In Wales single-storey bungalow extensions follow the normal limits (up to 4 m at the rear); adding a storey needs planning permission.
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.
The Party Wall etc. Act 1996 applies in Wales as in England: notice must be served before work to a shared wall, building on the boundary, or excavating close to a neighbour's foundations.
Applications are decided by the local planning authority (your county or county borough council, or the national park authority).
What is included
- Structural survey before any upward extension
- Single-storey extension options assessed first
- Level thresholds and accessible layouts
- Roof designs that tie into the existing hipped or gable roof
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
It starts with a visit to your house to measure, check access and talk through ideas and budget.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
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
We build it with one project manager, book the building control inspections and hand over the completion certificate.
Bungalow extension questions answered
Who do I contract with for a bungalow 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.
Can I see a price before committing to anything?
Yes. The guide prices on this page are adjusted for Colwyn Bay, and the guide-price tool gives a range for your own size. After the survey you get a written price before anything is agreed.
Do I need building regulations approval in Colwyn Bay?
Yes. Almost every extension needs it, whatever the planning route. We prepare the drawings and book the inspections.
How much does a bungalow extension cost?
Our guide range for single-storey work is about £1,630 to £3,160 per m² including VAT. Going upwards is priced after a structural survey.
Is it better to extend sideways or upwards?
Sideways and rearwards is usually simpler, cheaper and keeps single-level living. Upwards saves garden but means stairs, more structure and planning permission.
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.