Written by Mark Reid,
Trades Editor ·Verified 23 September 2026
Derby's housing stock is a real mix, and that shapes what window installers here actually deal with day to day. You've got Victorian terraces around Normanton and Peartree that still have timber sash frames some owners want to keep or replace like-for-like, plenty of 1930s semis in Chaddesden and Allestree with bay windows that need careful measuring, and newer estates out towards Oakwood and Mickleover where uPVC replacement is more straightforward. Installers working across the city need to know their way round conservation area restrictions too, since parts of Derby including the Cathedral Quarter have rules about what you can fit on the front elevation. That local knowledge matters more than people expect until they've had a quote rejected by planning.
The businesses featured on this page are drawn from public business listings, ranked mainly by review rating and how many reviews they've got, with a small boost for those showing a working website and phone number. We read through each business's homepage as well, to check that window installation is actually their main line of work rather than something a general builder lists as an afterthought, which keeps unrelated trades off this page. Listings flagged as permanently closed are stripped out automatically so you're not chasing a business that's shut up shop. Where you spot a Trust Verified badge, that business has gone through our full verification process covering trade qualifications and accreditations, public liability insurance, trading history, customer review history, and registered company information, and you can see exactly what that involves on our How We Verify page. Any business without that badge hasn't been independently verified by us, so it's worth doing your own homework before you book.
Before signing anything, ask to see the FENSA or CERTASS certificate that'll be issued once the work's done, since this confirms the installation meets building regulations without you needing a separate council inspection. Check whether the quote includes disposal of your old frames, scaffolding if it's an upstairs job, and making good the plaster around the reveals, because these get left out of cheaper quotes and added back on later. It's worth getting at least two or three quotes for anything beyond a single small window, since prices for a full house of uPVC replacements in Derby can range from around £4,000 for a modest semi up to £9,000 or more depending on glazing type and frame style. Ask about guarantees too, ten years on frames and glass units is fairly standard, but get it in writing before work starts.
How We Select & Rate The Best Window Installers in Derby
Businesses on this page are ranked using review rating and review count pulled from public business listings, with a small lift given to those showing a working website and phone number. We read each business's homepage to confirm window installation is genuinely their main trade, which keeps unrelated businesses off the page, and listings marked permanently closed are removed automatically. Where a business carries our Trust Verified badge, it has additionally passed full verification covering trade qualifications and accreditations, public liability insurance, trading history, customer review history, and registered company information, detailed further on our How We Verify page. Other businesses listed haven't been independently verified by us, and their inclusion here isn't an endorsement, so do 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 →
Rated 5.0 from 66 Google reviews, A.J.B Windows Doors And Conservatories carries a strong local reputation for window and door installation in Derby. The company also fits conservatories, covering the full range of common domestic glazing and entrance work. Based in the DE22 area, it serves residential customers across the city.
Homes and commercial properties across Derby rely on Abbey Glass (Derby) Ltd for window installation and glazing work. Based in DE24, the company holds a 4.4-star rating across more than a hundred Google reviews, reflecting a consistent record with local customers. Abbey Glass operates as an established independent in a city well served by national chains, offering a regionally rooted alternative.
Guttering and fascia work across Derby is handled by Arctic Windows, covering repairs, replacements and full installations on domestic properties. The firm has built up a run of five-star feedback from 39 customers, reflecting consistent attention to detail on jobs that often go unnoticed until they fail.
Trade Windows (Derby) Limited is a window installation company serving homes and properties across Derby. Rated 4.1 from 74 Google reviews, the business has built a steady local reputation for reliable fitting work. It operates from the DE24 area, making it a practical choice for residents in the south and east of the city.
Rated 4.8 out of 5 from 18 Google reviews, Oakwood Joinery and Windows Ltd offers window installation services to residential customers in Derby. Operating under the DE21 6SL postcode area, the company combines joinery expertise with window fitting, covering both the craft and the installation side of the work. Neighbours in the area have consistently rated the service highly across a modest but reliable review base.
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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A single uPVC window replacement in Derby typically runs from around £400 to £800 depending on size and glazing type, while a full house of eight to ten windows usually falls between £4,000 and £9,000. Sash window replacement or restoration costs more, often £1,200 to £2,000 per window, because of the joinery involved. Composite doors and bay windows push the price up further. Get two or three quotes before committing, since prices vary a fair bit between installers even for near-identical jobs.
Do I need planning permission for new windows in Derby?
Most window replacements count as permitted development and don't need planning permission, but if your home is in a conservation area, such as parts of the Cathedral Quarter or Darley Abbey, there may be restrictions on materials or styles visible from the street. Listed buildings almost always need listed building consent regardless of location. Check with Derby City Council's planning department before ordering anything if you're unsure, since removing sashes without consent on a listed property can lead to enforcement action.
What's the difference between FENSA and CERTASS certification?
Both are competent person schemes that let installers self-certify their work meets building regulations without a separate council inspection. FENSA is the older, more widely recognised scheme, while CERTASS covers similar ground. Either is fine, what matters is that your installer is registered with one of them and provides you with a certificate after the job, which you'll need if you ever sell the property.
How long does a window installation take?
A straightforward uPVC window replacement usually takes half a day to a day per window, with a full house typically done in two to four days. Sash window restoration or replacement takes longer, sometimes a week or more, because of the joinery and paint work involved. Weather can delay external work, and older properties with damaged reveals sometimes need extra time for repairs before the new frames go in.
Should I choose uPVC, timber, or aluminium windows?
uPVC is the cheapest and lowest maintenance option, suiting most modern and semi-detached properties across Derby. Timber suits period homes, particularly Victorian terraces and Edwardian villas, where planning rules or aesthetics call for it, but it needs repainting every few years. Aluminium sits in the middle price-wise and gives slim frames that suit larger contemporary glazing, often used in extensions or rear elevations. Think about your property's age and any conservation restrictions before deciding.
How do I choose between window installers in Derby?
Start by asking to see photos of recent completed jobs, ideally on properties similar to yours, and check whether they're registered with FENSA or CERTASS. Ask for proof of public liability insurance and check how long they've been trading, either through Companies House if they're a limited company or by asking directly. Read through recent customer reviews on public listings rather than just the star rating, since the detail in reviews often reveals how they handle problems. Get a written quote that breaks down materials, labour, disposal and guarantee terms, and be wary of anyone unwilling to put things in writing.
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