Barry house extensions
From a small utility to a two-storey addition, we take on house extensions throughout Barry, starting with a free visit and a planning check.
- Postcode districtsCF62, CF63
- Price regionWales (×0.93)
- Planning rulesWales
- Site visitFree, no obligation
What extensions cost in Barry
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) |
|---|---|---|
| Kitchen extensions | 20 m² | £39,000 – £49,500 |
| Orangery extensions | 16 m² | £41,500 – £52,500 |
| Side return extensions | 11 m² | £24,500 – £31,000 |
| Single-storey rear extensions | 20 m² | £38,000 – £48,500 |
| Double-storey extensions | 32 m² | £53,500 – £70,000 |
| Conservatory replacement extensions | 14 m² | £27,500 – £36,000 |
| Extensions over a garage | 12 m² | £23,000 – £30,500 |
Planning rules in Barry
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).
Which extension suits a Barry home?
In Wales, terraced houses with rear offshoots are common in the towns, while detached houses and bungalows dominate in rural areas.
For many houses here, pitched roof extensions, side return extensions or single-storey rear extensions gives the most useful space for the budget.
All extension types we build in Barry
- Glass box extensions · from £27,500
- Conservatory replacement extensions · from £18,500
- Planning permission for extensions · from £300
- Bungalow extensions · from £24,000
- Utility and boot room extensions · from £13,000
- Flat roof extensions · from £19,500
- Kitchen extensions · from £25,000
- Double-storey extensions · from £35,000
- Orangery extensions · from £27,500
- Timber frame extensions · from £19,500
- Extension plans and drawings · from £1,100
- Annexe extensions · from £51,000
- Extensions over a garage · from £22,000
- Pitched roof extensions · from £20,500
- Building regulations for extensions · from £800
- Side return extensions · from £16,500
- Home office extensions · from £14,500
- Porch extensions · from £3,700
- Side extensions · from £20,000
- Single-storey rear extensions · from £19,500
- Wraparound extensions · from £33,000
- Bedroom extensions · from £24,000
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
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 about extensions in Barry
How much does an extension cost in Barry?
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 Barry?
Yes, including the surrounding parts of South Glamorgan. Site visits are free and there is no obligation.
How long does an extension take in Barry?
Usually 2 to 4 months of design and approvals, then 10 to 16 weeks on site for a single-storey extension or 16 to 24 weeks for two storeys.
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.
Book a free site visit in Barry
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.