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 South Glamorgan?
In South Glamorgan, 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. Building costs in Wales run about 8% below the UK average, and the figures for South Glamorgan are adjusted to reflect that. 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 |
What moves the price most:
- Finishes
- Windows and doors
- Extent of rewiring and replumbing
- Kitchens and bathrooms
Your exact price depends on the survey and drawings. The guide price tool gives a quick range in the meantime.
Do you need planning permission for a house renovation in South Glamorgan?
Approvals for a house renovation in South Glamorgan follow the rules for Wales. In Wales internal renovation usually does not need planning permission unless the house is listed. Notifiable work must meet building regulations.
The Party Wall etc. Act 1996 applies in Wales, so notices must be served before work on a shared wall, on the boundary, or excavation close to a neighbour’s foundations.
At the survey we check your house’s planning history and any restrictions, and tell you which route applies.
What we handle
The work we manage on a house renovation:
- Decoration
- Plastering and boarding
- Kitchens and bathrooms
- Building control for notifiable work
- Structural repairs and damp treatment
- Rewiring and heating upgrades
How long does it take?
Expect 8 to 20 weeks on site depending on scope. Allow time beforehand for drawings and approvals, usually 6 to 12 weeks.
Building in South Glamorgan
Wales has many terraced valley streets, stone cottages and post-war estates, so extension designs are shaped by slopes, materials and local character.
Towns we cover in South Glamorgan include Cardiff, Barry and Penarth.
How it works
- 01
Survey and brief
We visit, discuss your ideas and budget, and survey the property or site at no cost.
- 02
Drawings and written quote
We prepare the design and give you a written, itemised quote with inclusions and exclusions.
- 03
Approvals in place
We handle planning, building control and neighbour notices before work starts.
- 04
Build and handover
Work follows the agreed programme, with inspections along the way and a completion certificate at the end.
Questions about house renovations in South Glamorgan
Do you renovate listed buildings?
Yes, with listed building consent and appropriate materials.
How long does a house renovation take in South Glamorgan?
Typically 8 to 20 weeks on site depending on scope. Design and approvals beforehand usually take 6 to 12 weeks.
Does a renovation need building regulations approval?
Some parts do, such as rewiring, structural changes, new windows and heating systems. We handle notifications.
How much does a house renovation cost in South Glamorgan?
In South Glamorgan, 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 I need planning permission for a house renovation in South Glamorgan?
In Wales internal renovation usually does not need planning permission unless the house is listed. Notifiable work must meet building regulations.
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.