Rhyl house extensions
We design and build house extensions for homes in Rhyl and the surrounding Clwyd area, with guide prices adjusted for the region.
- Postcode districtsLL18
- Price regionWales (×0.93)
- Planning rulesWales
- Site visitFree, no obligation
Rhyl extension prices at a glance
Prices on this page use our Wales factor of ×0.93, include VAT at 20% and cover the build; your written price follows a survey and agreed drawings.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Orangery extensions | 16 m² | £41,500 – £52,500 |
| Kitchen extensions | 20 m² | £39,000 – £49,500 |
| Side return extensions | 11 m² | £24,500 – £31,000 |
| Wraparound extensions | 25 m² | £53,000 – £67,500 |
| Single-storey rear extensions | 20 m² | £38,000 – £48,500 |
| Double-storey extensions | 32 m² | £53,500 – £70,000 |
Choosing the right extension in Rhyl
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.
The types we would usually look at first for a home in Rhyl are single-storey rear extensions, pitched roof extensions and side return extensions, depending on the garden and how the house is laid out.
Covering Rhyl and nearby
Across LL18, we can visit, measure and advise. Neighbouring towns we cover include Prestatyn (4 miles), Colwyn Bay (10 miles), Llandudno (14 miles), Flint (16 miles), Buckley (20 miles). Bangor, Gwynedd, in Gwynedd, is roughly 27 miles from Rhyl and also on our list.
Approvals for an extension in Rhyl
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.
In Wales a single-storey side return can fall within permitted development if it stays within the 4 m height limit and the width rules for side extensions. Conservation areas and listed buildings need consent, and the Party Wall Act applies to work on or near a shared wall.
In a conservation area, national park, National Landscape or World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
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).
Every extension type in Rhyl
- Extension plans and drawings · from £1,100
- Home office extensions · from £14,500
- Orangery extensions · from £27,500
- Timber frame extensions · from £19,500
- Single-storey rear extensions · from £19,500
- Glass box extensions · from £27,500
- Bungalow extensions · from £24,000
- Planning permission for extensions · from £300
- Conservatory replacement extensions · from £18,500
- Kitchen extensions · from £25,000
- Annexe extensions · from £51,000
- Side extensions · from £20,000
- Wraparound extensions · from £33,000
- Flat roof extensions · from £19,500
- Bedroom extensions · from £24,000
- Extensions over a garage · from £22,000
- Porch extensions · from £3,700
- Utility and boot room extensions · from £13,000
- Side return extensions · from £16,500
- Double-storey extensions · from £35,000
- Pitched roof extensions · from £20,500
- Building regulations for extensions · from £800
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 produce the drawings and structural design, and manage the approvals so they are in place before work starts.
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
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Questions about extensions in Rhyl
How much does an extension cost in Rhyl?
Using our Wales factor (×0.93), a standard-spec single-storey extension of 20 m² is a guide £38,000 to £48,500 including VAT, and a 32 m² two-storey extension £53,500 to £70,000. Your written price follows the survey.
Do you cover all of Rhyl?
Yes, including the surrounding parts of Clwyd. Site visits are free and there is no obligation.
Who do I contract with?
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.
Will my neighbours need to be told?
If you apply for planning the council notifies them, and in Wales party wall notices may be needed for work near a shared boundary.
Do you handle building regulations?
Yes. We prepare the drawings and calculations, submit them and book inspections, ending with a completion certificate.
Book a free site visit in Rhyl
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.