Written by Mark Reid,
Trades Editor ·Verified 23 September 2026
Grimsby's housing stock throws up a fair range of window jobs for local installers. You've got the bay-fronted Victorian terraces around Clee and Weelsby, the 1930s semis out towards Waltham and Scartho with their metal-framed originals long since replaced, and newer estates on the edge of town where uPVC or composite doors and windows need swapping out for something more efficient. Sea air off the Humber estuary doesn't help either, and it takes its toll on frames and seals faster than you'd get further inland, so a fair few enquiries here are about draughty, misted-up double glazing rather than brand new builds. Whatever the job, local installers tend to know which streets have conservation restrictions and which don't, which matters if you're near the town centre or in one of the older parts of Cleethorpes.
The businesses listed here are pulled from public business listings and ranked mainly by review rating and how many reviews they've built up, with a small boost given to those showing a working website and phone number. We read each business's homepage to check that window installation is genuinely their main line of work, which keeps roofers, general builders and other unrelated trades off this page. Listings flagged as permanently closed are stripped out automatically so you're not chasing a business that no longer exists. 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 read exactly what that involves on our How We Verify page. For any business without that badge, those checks haven't been done by us, so it's worth doing your own homework before you commit.
Before booking, ask for a written quote that breaks down the frame material, glazing type and installation cost separately, so you can actually compare like for like. Confirm whether the installer is FENSA or CERTASS registered, since that's what covers the building regulations paperwork for replacement windows, and ask to see it rather than just taking their word for it. Check their public liability insurance is current and get a rough timescale in writing, particularly if you're having a full house done and don't fancy living with plastic sheeting over gaps for a fortnight. 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 Grimsby
Businesses on this page are ranked using review rating and review count from public business listings, with a small lift given to those with a working website and phone number. We check each business's homepage to confirm window installation is their main trade, and listings flagged as permanently closed are removed automatically. Businesses marked Trust Verified have gone further, passing our full checks on trade qualifications, insurance, trading history, customer review history and registered company details; see our How We Verify page for the complete list. Other businesses shown here haven't been independently verified by us, and their inclusion isn't an endorsement. Always carry out your own checks before hiring anyone.
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 →
Elite Windows & Conservatories is a window and conservatory installer based in Grimsby, serving domestic customers across the local area. With a Google rating of 4.8 from 58 reviews, the company has built a consistent reputation for installation work in the DN36 postcode and surrounding districts. Services cover window supply and fitting alongside conservatory projects.
Specialising in double glazing installation, Crystal Double Glazing Ltd serves residential customers across Grimsby and the surrounding area. The company holds a 4.8 rating from 40 Google reviews, reflecting consistent feedback on its installation work. uPVC windows, doors, and conservatories form the core of its offer.
Rated 4.6 stars across 18 Google reviews, Newglaze is a window installation company serving Grimsby and the surrounding area. The business covers domestic glazing work, with a consistent track record reflected in its customer feedback. Homeowners in the DN32 postcode area and beyond use the company for window supply and fitting.
Rated 4.4 out of 5 across 20 Google reviews, Starline Windows Ltd supplies and installs windows for residential customers in Grimsby and the surrounding area. The DN36 postcode base places the company well for serving properties across northern Lincolnshire. A consistent review score from a modest but genuine sample suggests reliable workmanship and straightforward customer dealings.
KP Double Glazing Limited is a window installation company based in Grimsby, serving residential customers across the local area. The business handles supply and fitting of double glazed units, with a web presence at kpdoubleglazing.co.uk for those looking to request quotes or browse options. Its postcode, DN36, places it within the broader Lincolnshire coastal corridor.
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 Grimsby?
A standard uPVC window replacement in Grimsby typically runs from around £350 to £600 per window fitted, depending on size and glazing type. A full house of eight to ten windows often comes in between £3,500 and £7,000, more if you're going for composite doors or aluminium frames, which push costs up considerably. Bay windows and anything requiring structural work will add several hundred pounds on top. It's worth getting two or three quotes since prices vary more than you'd expect between local installers for the same spec.
How long does it take to fit new windows?
Most straightforward jobs, say six to eight standard windows, take one to two days once the installer's on site, assuming the frames arrive on schedule. Bay windows or anything needing brickwork alterations can add an extra day. Lead time before they start is usually the longer wait, often four to eight weeks from order to fitting, since frames are typically made to measure.
Do I need planning permission for new windows in Grimsby?
Most replacement windows fall under permitted development and don't need planning permission, provided you're not in a conservation area or altering the building's appearance significantly. Parts of Cleethorpes old town and areas near St James' have conservation designations, so check with North East Lincolnshire Council if you're unsure. Any reputable installer should flag this during the quote if it applies to your property.
What's the difference between FENSA and CERTASS registration?
Both schemes allow installers to self-certify that replacement windows meet building regulations, sparing you the cost of a separate building control inspection. FENSA is the older, more widely recognised scheme, while CERTASS covers similar ground. Either is fine, but ask to see the actual certificate number and check it against the scheme's online register rather than just trusting a logo on a van.
Should I choose uPVC, aluminium or timber windows?
uPVC remains the most common choice in Grimsby for cost and low maintenance, generally cheapest and good for energy efficiency. Aluminium suits contemporary properties and larger glazed areas but costs more, typically 20 to 30 percent above equivalent uPVC. Timber looks right on period Victorian terraces but needs repainting or treating every few years, which is worth factoring into long-term cost.
How do I choose between window installers in Grimsby?
Start by checking their FENSA or CERTASS registration number against the official register, don't just take a certificate on trust. Ask for photos or addresses of previous jobs nearby, ideally something you can go and look at. Read through recent reviews on public listings for mentions of tidiness, timekeeping and how snagging issues were handled. Get quotes from at least three installers with identical specifications so you're comparing fairly, and confirm what guarantee covers the frames, glazing and workmanship separately, since these often differ in length.
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