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 Caernarfon?
In Caernarfon, 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 Caernarfon 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 |
The main things that change the cost:
- Whether you live in during the work
- Structural and damp repairs
- Windows and doors
- Finishes
For a figure based on your own measurements, try the guide price tool, then book a free home visit for a fixed quote.
Do you need planning permission for a house renovation in Caernarfon?
Whether you need planning permission depends on your house and its location 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.
Our first visit includes a check of your planning history, so you know the route before paying for drawings.
What we handle
On a typical house renovation we handle:
- Kitchens and bathrooms
- Building control for notifiable work
- Decoration
- Plastering and boarding
- Structural repairs and damp treatment
- Condition survey and scope of works
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 Caernarfon
Terraced houses in Welsh towns often have narrow plots, which suits rear and side return extensions and rear dormers.
We work across Caernarfon and neighbouring areas such as Bangor, Holyhead and Llandudno. Postcodes we cover in Caernarfon include LL55.
How it works
- 01
Visit and measured survey
A free visit to understand the project, check access and take measurements.
- 02
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Permissions sorted
Applications, building control and neighbour arrangements, all before the start date.
- 04
Build and sign-off
We run the build to a written programme and hand over the completion certificate.
Questions about house renovations in Caernarfon
Do I need planning permission for a house renovation in Caernarfon?
In Wales internal renovation usually does not need planning permission unless the house is listed. Notifiable work must meet building regulations.
Can I live in the house during a renovation?
For light work, yes. For a full renovation, most clients move out for some or all of the job.
How much does a house renovation cost in Caernarfon?
In Caernarfon, 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.
Does a renovation need building regulations approval?
Some parts do, such as rewiring, structural changes, new windows and heating systems. We handle notifications.
Do you build house renovations in Caernarfon?
Yes. We build house renovations across Caernarfon, including postcodes LL55. Every project starts with a free home visit.
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.