Cardiff porch extensions, designed and built
If you live in Cardiff and want more space without moving, a porch extension is one of the most practical ways to get it. We handle the drawings, approvals and the build.
- Guide price in CardiffFrom £3,700 inc VAT
- PlanningSmall porches often permitted development
- Build time2–4 weeks on site
- Postcode districtsCF5, CF10, CF11, CF14, CF23
Do I need planning permission in Cardiff?
In Wales small porches are usually permitted development within size and boundary limits similar to England's. We check the current Welsh limits for your address.
Homes in conservation areas, national parks, National Landscapes (AONBs) and World Heritage Sites have tighter rules, so we always check the property's status and planning history before design starts.
Building over or within 3 m of a public sewer needs the water company's consent before the foundations go in.
Applications are decided by the local planning authority (your county or county borough council, or the national park authority).
What we take care of
- Planning check against the porch limits
- Brick, render or oak frame walls
- Tiled, slate or flat roof
- Front door, glazing and electrics
- Foundations and drainage for rainwater
- Design to suit the house style
How much does a porch extension cost in Cardiff?
Labour and material costs vary across the UK, so for Cardiff we use our Wales factor (×0.93). The ranges include VAT and exclude design, structural and council fees.
| Option | What it covers | Guide price |
|---|---|---|
| Essential | Small brick or glazed porch, up to 3 m² | £3,700 – £6,050 |
| Standard | Brick porch with tiled roof and composite door | £5,550 – £8,850 |
| Premium | Larger porch with WC or oak frame and premium glazing | £8,350 – £13,950 |
Want a range for your exact size? The guide-price tool takes about a minute.
Local to Cardiff
Postcode districts we cover around Cardiff include CF5, CF10, CF11, CF14, CF23, CF24. Neighbouring towns we cover include Penarth (3 miles), Barry (7 miles), Cowbridge (12 miles).
Caerphilly, in Mid Glamorgan, is roughly 7 miles from Cardiff and also on our list. In Wales, terraced houses with rear offshoots are common in the towns, while detached houses and bungalows dominate in rural areas.
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
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
We confirm the build price in writing, based on the approved drawings and the finishes you have chosen.
Build and sign-off
Work is carried out to the agreed programme, inspected by building control and signed off at the end.
Porch extension questions answered
Can I see a price before committing to anything?
Yes. The guide prices on this page are adjusted for Cardiff, 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 you cover all of Cardiff?
Yes. We cover Cardiff and the surrounding parts of South Glamorgan. Site visits are free and there is no obligation.
Who do I contract with for a porch extension in Cardiff?
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 much does a porch cost?
Our guide range is about £3,700 to £13,950 including VAT, depending on size, materials and whether it includes a WC.
Book a free site visit in Cardiff
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.