double glazing specialists in Cardiff
Finding reliable double glazing installers in Cardiff just got easier. Pro-Fit Window Systems works with a vetted network of FENSA-registered specialists across Cardiff who compete for your business — at no cost to you.
From a single window replacement to a full property upgrade, our network of Cardiff specialists will compete for your job. Homeowners in Wales who compare quotes typically save £352–£1,056 against the first price they're offered.
Double Glazing prices in Cardiff 2026
Here's a guide to what you can expect to pay for double glazing 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 — Double Glazing in Cardiff
Double Glazing prices in Cardiff — what should I budget?
In Cardiff, you can expect to pay from £308 for a standard casement window installed, up to £2,816 for a full bay window. Prices in Cardiff are below the national average. The best way to get an accurate price is to compare quotes from local FENSA-registered installers using our free tool.
What's the typical installation time for double glazing in Cardiff?
Most installations in Cardiff take 1–3 days, depending on the number of windows. A single window replacement typically takes 2–4 hours. Installers will usually survey the property first and give you an exact timeframe during the quote process.
Are your Cardiff window installers FENSA registered?
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?
In most cases, replacing windows like-for-like in Cardiff does not require planning permission — it falls under permitted development. However, if you live in a conservation area or listed building in Cardiff, you may need consent. Your installer will advise you during the free survey.