- Postcode districts
- CF15, CF83
- Nearby
- Risca, Pontypridd and Gelligaer
- Guide price
- £6,000–£12,000
- Typical time on site
- 6–12 working days
- Water
- Varies across Gwent
- Survey
- Free, at your home
What does a loft bathroom cost in Caerphilly?
Guide price in Caerphilly: £6,000–£12,000 including VAT, depending on the room and what you choose. Labour costs in Wales put local prices at about 7% below the UK guide figure. The figure depends on the size of the room, whether anything moves, and the products you pick.
Refit
- Tiling, lighting, extractor fan
Signature
- Walk-in shower under the ridge
New loft bathroom
- New drainage route and water supply
Guide prices for Caerphilly including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Caerphilly
As well as Caerphilly itself (CF15 and CF83), we survey in Risca, Pontypridd and Gelligaer.
In Caerphilly, as anywhere, the age of the house decides a lot: pipe sizes, floor construction and where the soil stack runs. For a loft bathroom in a tank-fed Caerphilly home, we work out how the shower will get its pressure before choosing a single fitting. If your Caerphilly loft conversion has a bedroom but no bathroom, the survey starts with where the soil stack runs and how much headroom you have.
Water hardness varies across Gwent: some supplies are soft, others moderately hard or hard. A quick wipe of the glass and an easy-clean coating are worth having on a new shower in Caerphilly. Hardness varies street by street, so check the figure for your postcode with your water supplier.
What the job includes
- Electrics by a qualified electrician, tested and certified, then tiling, testing and handover
- A shower pump on a gravity system, an electric shower, or advice on moving to mains pressure, depending on your system
- An extractor fan ducted through the roof or a gable wall, with the duct insulated through cold spaces
- A check of the floor joists where a bath or large shower tray will sit
Decisions to make first
Roof window
A roof window over the bath or shower brings daylight and fresh air, but plan the blind for privacy and expect condensation on cold glass.
Gravity or pumped waste
Gravity is silent and maintenance-free. A pumped waste or macerator lets fittings sit away from the stack, provided the house has a WC on gravity drainage elsewhere.
Rules that apply in Wales
Wales applies its own Part P, with a wider notifiable list than England, and its own Part F with similar extract rates. Part H covers the new drainage route down from the loft.

