Written by Mark Reid,
Trades Editor ·Verified 23 September 2026
Leicester's housing stock is a real mix, from the Victorian terraces around Clarendon Park and Highfields to the 1930s semis in Birstall and the newer estates out towards Hamilton and Oadby. That variety matters when you're choosing window installers, because a period property with original sash windows needs a very different approach to a new-build with standard uPVC frames. Plenty of local firms specialise in one or the other, and some cover both, so it's worth checking what a company actually does day to day before you get them round for a quote.
The businesses featured on this page come from public business listings, ranked mainly by their review rating and the number of reviews they've built up, with a small boost given to those that have a working website and phone number listed. We also read each business's homepage to check that window installation is genuinely what they focus on, which stops unrelated builders or general handymen cluttering up the results. Any listing that's flagged as permanently closed gets removed automatically, so what you're looking at should reflect who's actually trading. Where a business carries a Trust Verified badge, it means they've gone through our fuller verification process, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information. You can read exactly what that involves on our How We Verify page. For businesses without that badge, we haven't independently checked those things ourselves, so it's down to you to do that homework before booking anyone.
Before signing anything, ask to see FENSA or CERTASS certification, since this confirms the installation meets building regulations without you needing a separate council inspection. Get a written quote that breaks down the frame material, glazing type (double or triple glazing, and what U-value you're getting), and whether removal and disposal of old windows is included in the price. It's also worth asking how long the guarantee lasts and whether it covers the glazing unit as well as the frame and hardware, since these sometimes differ. Getting two or three quotes is standard practice here, not overkill, and it'll quickly show you if one price is out of step with the rest.
How We Select & Rate The Best Window Installers in Leicester
Rankings are based on review rating and review count pulled from public business listings, with a small lift given to businesses showing a working website and phone number. We check each business's homepage to confirm window installation is what they primarily offer, which keeps unrelated trades off this page. Listings flagged as permanently closed are removed automatically. Businesses marked Trust Verified have gone further, passing our full verification of trade qualifications, insurance, trading history, customer review history and registered company details; see our How We Verify page for the complete list. Other businesses here haven't been independently verified by us, and their inclusion isn't an endorsement. Always carry out your own checks before hiring.
Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. Every other listing is ranked on rating and review count from third-party business listings. How we rank & verify →
A window and conservatory installer serving Leicester and the surrounding area, Harveys Windows & Conservatories covers supply and fitting across the domestic market. The business holds a 4.8 rating from 123 Google reviews, reflecting consistent feedback from local customers. Enquiries and product information are available through their website.
Rated 4.9 out of 5, Wilson Windows Ltd has built a consistent record among Leicester residents for window installation work. The company covers the LE11 area and operates across the wider Leicestershire region. Its rating reflects a volume of completed jobs rather than a handful of reviews, making it a reliable reference point for homeowners comparing local installers.
Sash and casement window replacement forms the core of Abbey Windows' work in Leicester, catering to older properties where matching original profiles matters. Based in the LE4 area, the firm has built a full five-star record from 17 reviews. Double glazing units and repairs are also carried out alongside full installations.
Window installation across Leicester is the focus of Prestige Portals, a specialist fitting company based in LE5. The business holds a perfect five-star rating on Google, drawn from customer reviews, and concentrates solely on the supply and installation of windows for residential and commercial properties. Enquiries and further details are available through their website at prestigeportals.com.
Specialising in emergency glass replacement, Emergency Glazing Services operates across Leicester with a focus on rapid response to broken or damaged windows. The company covers both domestic and commercial properties, making it a practical option for landlords, homeowners and businesses dealing with urgent glazing failures. Same-day callouts are a core part of the service offer.
Transparency notice: Recommended and Featured listings are paid placements, so a business's fee affects whether and where it appears. All other listings are ranked by a combined score drawn from ratings and review counts published on third-party business listings, plus basic completeness signals such as a working website and phone. A Trust Verified badge means we have independently checked that business's documents; businesses without it have not been independently verified by us. How we verify →
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How much does a window installers cost in Leicester?
For a standard uPVC window in a semi-detached house, expect somewhere between £350 and £650 per window supplied and fitted, depending on size and glazing spec. A full house re-glaze (say 8 to 10 windows) often lands between £4,000 and £8,000. Timber or aluminium frames cost more, sometimes 30 to 50% above uPVC, and period-style sash windows in conservation areas can push costs higher again due to the joinery involved. Getting two or three quotes is normal practice and helps you spot if someone's pricing well above or below the local going rate.
Do I need planning permission to replace windows in Leicester?
Most window replacements count as permitted development and don't need planning permission, provided you're not changing the building's appearance significantly. The exception is if your property is listed or sits within a conservation area, such as parts of New Walk or the Cultural Quarter, where you may need consent for materials or styles. Check with Leicester City Council's planning department before ordering anything if you're unsure, since getting it wrong can mean costly changes later.
What's the difference between FENSA and CERTASS certification?
Both are competent person schemes that let installers self-certify their work meets building regulations, so you don't need a separate council inspection. FENSA is the more widely known scheme, while CERTASS covers similar ground but through a different governing body. Either is acceptable, but ask to see the certificate number and confirm it's registered once the job's done, as this protects you if you sell the house later and need proof of compliance.
How long does a typical window installation take?
A single window usually takes half a day to fit once it's arrived. A full house of 8 to 10 windows typically takes 2 to 3 days, though bay windows or anything needing brickwork alterations will add time. Bespoke timber frames often have longer lead times before installation even starts, sometimes 6 to 8 weeks from order, so factor that into your planning if you're working to a deadline.
Should I choose uPVC, timber, or aluminium windows?
uPVC is the most common choice in Leicester because it's low maintenance and cost-effective, suiting most semis and terraces. Timber suits period properties and conservation areas but needs repainting or staining every few years. Aluminium gives slim frames and a modern look, popular for extensions and larger glazed areas, but tends to cost more than uPVC. Think about your property's style, your budget, and how much upkeep you're willing to do before deciding.
How do I choose between window installers in Leicester?
Start by asking to see FENSA or CERTASS registration and check the number against the official register yourself. Ask for photos of previous jobs similar to yours, particularly if you've got bay windows or need brickwork altering. Request a written guarantee covering both the frame and the glazing unit, and check how long it runs for. Read recent customer reviews rather than just the overall star rating, since that shows how a business handles problems when they crop up. Finally, get at least two quotes in writing before you commit, and query anything that seems unusually cheap.
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