What is a house renovation?
A house renovation brings an older or tired home up to date. It can include rewiring, a new heating system, replastering, new floors, windows, kitchens and bathrooms, and changes to the layout. A full renovation is often combined with an extension or loft conversion.
How much does a house renovation cost in Caerphilly?
In Caerphilly, a house renovation typically costs £850–£1,650 per m² for a medium to full renovation, including VAT at 20% (5% may apply to homes empty for two years or more). For a typical 90 m² project that is roughly £76,500–£148,500. Prices across Wales are typically 8% below the UK average for this kind of work, which is reflected in the range for Caerphilly. Design, structural calculations and council fees are extra.
| Size or type | Guide range |
|---|---|
| Smaller project (63 m²) | £53,500–£104,000 |
| Typical project (90 m²) | £76,500–£148,500 |
| Larger project (126 m²) | £107,000–£208,000 |
| Rate per m² | £850–£1,650 |
The biggest cost drivers are:
- Extent of rewiring and replumbing
- Windows and doors
- Whether you live in during the work
- Structural and damp repairs
A guide range is only a starting point: the guide price tool gives an instant figure for your size, and a free survey turns it into a fixed quote.
Do you need planning permission for a house renovation in Caerphilly?
Before anything is built in Caerphilly, we confirm which approvals apply in Wales. In Wales internal renovation usually does not need planning permission unless the house is listed. Notifiable work must meet building regulations.
Building regulations in Wales are set by the Welsh Government. Approval comes from the council’s building control service or a registered building control approver, with inspections during the work and a completion certificate at the end.
If the answer is not clear-cut, we can apply for formal confirmation before you commit to the build.
What we handle
Handled as part of most house renovations:
- Structural repairs and damp treatment
- Joinery, doors and floors
- Plastering and boarding
- Building control for notifiable work
- Decoration
- Condition survey and scope of works
How long does it take?
Build time is typically 8 to 20 weeks on site depending on scope. Design and approvals come first and typically take 6 to 12 weeks, depending on the approval route.
Building in Caerphilly
Wales has many terraced valley streets, stone cottages and post-war estates, so extension designs are shaped by slopes, materials and local character.
Caerphilly sits in Mid Glamorgan, about 7 miles north of Cardiff. We cover the whole of Caerphilly, including postcodes CF83.
How it works
- 01
Survey and brief
We visit, discuss your ideas and budget, and survey the property or site at no cost.
- 02
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Build and sign-off
We run the build to a written programme and hand over the completion certificate.
Questions about house renovations in Caerphilly
Do I need planning permission for a house renovation in Caerphilly?
In Wales internal renovation usually does not need planning permission unless the house is listed. Notifiable work must meet building regulations.
How long does a full renovation take?
Typically 8 to 20 weeks on site depending on the size of the house and scope.
Is VAT reduced on renovations?
Usually not; the standard 20% rate applies. A reduced 5% rate can apply when renovating a home that has been empty for at least two years.
How much does a house renovation cost in Caerphilly?
In Caerphilly, a house renovation typically costs £850–£1,650 per m² for a medium to full renovation, including VAT at 20% (5% may apply to homes empty for two years or more). A typical 90 m² project comes to roughly £76,500–£148,500. Your fixed price depends on the survey and drawings.
Do you renovate listed buildings?
Yes, with listed building consent and appropriate materials.
Who approves a house renovation in Caerphilly?
Planning matters in Caerphilly go to the council covering your address, and the work needs building control approval. We prepare and submit the applications for you.