bay window installation specialists in Cardiff
Homeowners in Cardiff use Pro-Fit Window Systems to collect free bay window installation quotes from trusted local installers. Every company in our Cardiff network is FENSA-registered and independently rated.
Whether you're replacing a single window or upgrading your entire home, we match you with up to 3 trusted local specialists — so you can compare prices and choose the best deal. The average homeowner in Wales saves £352–£1,056 by comparing quotes rather than accepting the first offer.
Bay Windows prices in Cardiff 2026
Here's a guide to what you can expect to pay for bay window installation in Cardiff. All prices are installed costs — use our free tool to get your exact local quote.
| Window Type | From (installed) | Up to (installed) |
|---|---|---|
| Casement (single) | £308 | £616 |
| Casement (large) | £440 | £792 |
| Sash Window | £528 | £968 |
| Bay Window (3-panel) | £1,056 | £2,816 |
| Tilt & Turn | £352 | £660 |
* Prices are estimates for Cardiff based on current market data. Your exact quote will depend on window size, specification and chosen installer.
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Get Quotes in Cardiff →FAQs — Bay Windows in Cardiff
How much does bay window installation cost in Cardiff?
Installed bay window installation costs in Cardiff start from around £308 per window and can reach £2,816 for larger bay units. Cardiff prices are below the national average. Getting multiple quotes through our free service is the most reliable way to establish an exact budget.
What's the typical installation time for bay window installation in Cardiff?
The time required depends on how many windows are being installed. In Cardiff, a single window can be replaced in 2–4 hours, while a whole-house installation typically takes 2–3 days. Your installer will confirm the schedule during their free property survey.
Are the window fitters in Cardiff properly certified?
Absolutely. FENSA registration is a mandatory requirement for all companies in our Cardiff network. It certifies that installers meet UK Building Regulations standards and automatically includes a 10-year insurance-backed guarantee on every job.
Can I replace my windows in Cardiff without planning consent?
For the majority of Cardiff properties, window replacement is classed as permitted development and does not need planning permission. Exceptions apply if your home is in a Cardiff conservation area or is a listed building, in which case local authority consent may be required.