How do I choose a trustworthy window / door fitter?

Compare the public evidence on each profile — how many independent reviews they have and across how many named platforms, the rating and how recent it is, any verified credentials, and the company record. A window / door fitter backed by several named sources is harder to fake than one with a single listing.

Does MyTrustedTraders rank or recommend windows / door fitters for payment?

No. There are no ads and no paid placement. Windows / door fitters are ranked only by the strength of independent public evidence — no one can pay to rank higher, add a badge, or change their reviews.

Where do the reviews come from?

They're imported from named public review platforms and always shown with the source named — they aren't reviews written on MyTrustedTraders. We cross-check the same business across sources rather than creating new reviews.

What should I check before hiring a window / door fitter?

Confirm credentials and insurance directly with the window / door fitter, get a written quote, and run the Cowboy Checker on the business first. MyTrustedTraders helps you shortlist on the evidence — it doesn't replace your own checks before you hire.

Windows / door fitters in the United Kingdom

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Find windows / door fitters across the United Kingdom, each compared on their reviews, verified credentials and named-source evidence across sources — independent evidence, no ads, no paid placement. Add your area below to see who's near you.

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What to check when hiring windows / door fitters in the United Kingdom

MyTrustedTraders ranks on independent public evidence — no ads, no paid placement. Use these checks alongside the evidence on each profile before you decide who to contact.

Look for consistent reviews across several named platforms, not one polished profile.
Check any verified credentials, and that the business details independently check out.
Get a written quote and keep guarantee, insurance and payment terms in writing.
Run the Cowboy Checker before you commit to anyone.

Which credentials should a window / door fitter have? See the guide →

How to judge a window / door fitter

Independent, no-ads guidance — the trade-specific checks that matter most, the warning signs, and what to ask before you hire. Use it alongside each trader’s public evidence above.

Verify before you hire

Check they are registered with FENSA or CERTASS — this is how they legally self-certify your replacement complies with building regulations.
Confirm they offer a deposit protection scheme (DGCOS or TrustMark) so your upfront payment is covered if they go bust before fitting.
Ask for an insurance-backed guarantee (IBG) in writing — it must survive company failure, not just last as long as the firm trades.
If you live in a conservation area or listed building, verify they understand the planning rules before any work starts.

Warning signs of a cowboy

No FENSA or CERTASS registration — you will have to arrange separate council building-control approval, which costs extra and delays a house sale.
Demands more than 25–50% upfront with no mention of deposit protection or any written guarantee.
Applies same-day or tonight-only pressure to sign — a known hard-sell tactic in double glazing, and a Trading Standards red flag.
Quote describes a premium product but the written contract is vague about brand, specification, or glass unit — classic bait-and-switch setup.

Questions to ask before you hire

Are you currently registered with FENSA or CERTASS, and can I look up your registration number before signing?
Is my deposit protected, and which scheme covers it — DGCOS or TrustMark?
What insurance-backed guarantee do you offer, how many years does it run, and who underwrites it if your company closes?
Does my property need any planning permission or listed-building consent before you start?

Frequently asked questions

How do I choose a trustworthy window / door fitter?: Compare the public evidence on each profile — how many independent reviews they have and across how many named platforms, the rating and how recent it is, any verified credentials, and the company record. A window / door fitter backed by several named sources is harder to fake than one with a single listing.
Does MyTrustedTraders rank or recommend windows / door fitters for payment?: No. There are no ads and no paid placement. Windows / door fitters are ranked only by the strength of independent public evidence — no one can pay to rank higher, add a badge, or change their reviews.
Where do the reviews come from?: They're imported from named public review platforms and always shown with the source named — they aren't reviews written on MyTrustedTraders. We cross-check the same business across sources rather than creating new reviews.
What should I check before hiring a window / door fitter?: Confirm credentials and insurance directly with the window / door fitter, get a written quote, and run the Cowboy Checker on the business first. MyTrustedTraders helps you shortlist on the evidence — it doesn't replace your own checks before you hire.

More ways to check who to trust

Free, independent checks — no ads, no paid placement.

Trade Credential Guide
Which official register to check for each trade — and how to verify it.
Cowboy Checker
Spot the warning signs of a rogue trader before you hire.
Council Experience
Which architects and agents know your local council.
Planning Approval Rate
How often a firm's planning applications get approved.
Planning Finder
Planning applications and the architects behind them, by postcode.

Or browse tradespeople by trade