Written by Mark Reid,
Trades Editor ·Verified 23 September 2026
Oxford's housing stock throws up more variety than most cities its size. You've got Victorian terraces in Jericho and East Oxford with original sash windows that conservation rules often require to be replicated rather than replaced, 1930s semis out in Headington and Cowley with tired metal-framed windows crying out for uPVC or aluminium upgrades, and newer builds around Kidlington and Botley where it's more a case of straightforward double glazing swaps. Add in the number of listed buildings and properties within the city's conservation areas, and you'll find planning permission or listed building consent comes up a lot more here than in the average town. A good local installer knows when that applies and won't just turn up with a standard uPVC catalogue.
The businesses on this page are pulled from public business listings and ranked using review rating and review count, with a modest boost for those that have a working website and phone number listed. We then check each business's homepage ourselves to confirm window installation is genuinely what they do day to day, which stops general builders or double glazing sales agents who dabble occasionally from cluttering up the page. Listings flagged as permanently closed get removed automatically. Where you spot a Trust Verified badge, that business has gone further and passed our full verification, covering trade qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information. Our How We Verify page sets out exactly what that involves. For any business without the badge, we'd suggest doing those checks yourself before you book anything in.
Before signing off on a quote, ask to see evidence of FENSA or CERTASS registration, since that's what covers building regulations compliance for replacement windows without a separate council application. Ask what guarantee is offered on the frames and the glazing units separately, as these often differ, and get it in writing. If your property sits in a conservation area or is listed, check the installer has handled similar jobs before and understands what materials or designs are permitted. It's worth getting two or three quotes for any job over a few thousand pounds, not just for the price but to compare how thoroughly each installer surveys the property and explains the work involved.
How We Select & Rate The Best Window Installers in Oxford
Businesses are ranked using review rating and review count taken from public business listings, with a small lift given to those showing a working website and phone number. We check each business's homepage to confirm window installation is their primary trade, which keeps unrelated businesses off this page. Listings marked permanently closed are removed automatically. Businesses displaying a Trust Verified badge have additionally passed our full verification, covering qualifications and accreditations, public liability insurance, trading history, customer review history and registered company information; see our How We Verify page for full details. Other businesses listed have not been independently verified by us, and appearing here 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 →
Specialising in timber window and door installations, Woodcraft Windows Oxford serves residential properties across Oxford and the surrounding area. The company holds a 4.9 rating from 85 Google reviews, reflecting consistent workmanship on bespoke and replacement joinery projects. Customers in OX4 6LB and neighbouring postcodes use them for both period restoration and new-build work.
Sash and Blenheim are window installers based in Oxford, specialising in sash windows for residential properties. Working within the OX2 area, the company focuses on period-appropriate installations suited to the older housing stock common across the city. Their work covers supply and fitting, with a particular emphasis on timber sash styles that suit traditional and conservation-area homes.
Window installation across Oxford and the surrounding area is the focus of Radley Windows Limited, a company covering both residential and commercial properties. Operating from OX11 7PJ, the business handles supply and fitting of replacement windows. Homeowners and developers in the region use them for straightforward, professionally managed glazing work.
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 typically runs from around £400 to £800 depending on size and style, while a full house re-glaze on a three-bedroom semi in areas like Cowley or Headington often lands between £5,000 and £9,000. Timber sash windows or anything requiring conservation-area matching push costs higher, sometimes £900 to £1,500 per window, because of the joinery involved. Aluminium framing sits somewhere between the two. Prices vary with glazing type (double versus triple), frame material and how accessible the property is, so getting two or three quotes for anything beyond a single window is worth the time.
Do I need planning permission to replace windows in Oxford?
Most straightforward replacements fall under permitted development and just need to meet building regulations, which a FENSA or CERTASS registered installer can self-certify. However, if your property is listed or sits within one of Oxford's conservation areas (Jericho, Norham Manor and Summertown among them), you may need listed building consent or planning permission, particularly if you're changing the style or material from the original. Check with Oxford City Council's planning department or ask your installer to confirm before work starts.
How long does a full window installation take?
A single window can often be fitted in half a day. A full house replacement, say eight to twelve windows on a typical terrace, usually takes two to four days depending on frame type and whether any brickwork or lintels need attention. Bay windows and anything requiring bespoke timber joinery for period properties will add time, sometimes a week or more if the frames are made to order rather than off the shelf.
What's the difference between FENSA and CERTASS registration?
Both are competent person schemes that let installers self-certify their work meets building regulations without a separate council inspection, so functionally they do the same job. FENSA is the older and more widely recognised of the two. What matters practically is that your installer is registered with one of them, and that they give you the certificate after the job, since you'll need it if you ever sell the property.
Should I choose uPVC, timber or aluminium windows?
uPVC is the cheapest and lowest maintenance option, suits most modern and 1930s properties, and is what most installers fit as standard. Timber suits period and listed properties better, particularly sash windows in Jericho or central Oxford terraces, but costs more and needs repainting every few years. Aluminium gives slim sightlines and suits contemporary extensions or larger glazed areas, sitting in the middle price-wise. Think about your property's age and any conservation restrictions before deciding on cost alone.
How do I choose between window installers in Oxford?
Ask to see their FENSA or CERTASS registration number and check it independently on the relevant scheme's website, since anyone can claim membership. Look at how long they've been trading and read through recent customer reviews rather than just the star rating, checking for repeated complaints about missed appointments or poor finishing. Get a written quote that breaks down frame type, glazing spec and guarantee length, and ask for two or three references from jobs done in the last year or so. If a business carries a Trust Verified badge on this page, that means we've checked qualifications, insurance and trading history ourselves. For anyone without it, it's down to you to confirm those details before booking.
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