✓ Verified Google reviews·✓ Reviewed regularly·✓ Updated 12 August 2026
Written by Mark Reid,
Trades Editor ·Verified 12 August 2026
Maidstone's housing stock is genuinely varied, which matters more than people expect when replacing windows. You'll find Victorian and Edwardian terraces around Fant and Bower Mount Road, post-war semis across Shepway and Park Wood, and newer builds out towards Maidstone Barracks and Vinters Park. Each era brings different frame sizes, different reveal depths, and different expectations around planning permission, particularly for older properties near the town centre or in conservation-adjacent streets. Casement windows dominate across much of the borough, though sash windows are common on period properties and need a specialist touch if you want the proportions to look right. Many installers in this part of Kent also deal with the practicalities of older brickwork, which can be softer than modern cavity-wall construction and needs careful attention when cutting out old frames.
The businesses listed on this page were drawn from third-party public business listings and ranked by public review rating and review count. Businesses with a working website and phone number received a small lift in that ranking. We also checked each business's homepage to confirm that window installation is what they primarily offer, which is how unrelated tradespeople get kept off the page. Any listing flagged as permanently closed has been removed automatically. Where you see a Trust Verified badge on a business, that company has additionally passed our full verification process, which covers trade qualifications and accreditations, public liability insurance, trading history, customer review history, and registered company information. See our How We Verify page for the full list of checks involved. Businesses without that badge have not been independently verified by us, and you should carry out your own checks before booking.
Before you commit to anyone, get at least two or three written quotes and make sure each one specifies the same thing: frame material (uPVC, aluminium, or timber), glazing specification (most residential installs use A-rated double glazing as standard, but triple glazing is worth asking about for north-facing rooms), energy rating, and the U-value of the units being fitted. Ask whether the price includes disposal of old frames. For replacement windows in England, your installer should provide a FENSA or CERTASS certificate on completion, because building regulations require third-party sign-off on glazing work and you'll need that certificate when you sell. Check whether the company is registered with one of those schemes before you sign anything.
How We Select & Rate The Best Window Installers in Maidstone
Rankings on this page are driven by public review rating and review count from third-party business listings, with a small lift applied to businesses that have a working website and a listed phone number. We check each business's homepage to confirm that window installation is what they primarily offer, which keeps unrelated trades off the page. Permanently-closed listings are removed automatically. Businesses marked Trust Verified have additionally passed our full verification covering qualifications, insurance, trading history, customer review history, and registered company information. See our How We Verify page for details. Other businesses listed here have not been independently verified by us, and inclusion is not 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 perfect five-star rating across 82 Google reviews marks Fab Fascias and Windows Ltd out among window installers in Maidstone. The company fits windows, fascias, and associated exterior joinery for residential customers in the ME18 area. That consistent customer feedback points to reliable workmanship rather than a one-off result.
Rated 4.9 stars from 44 Google reviews, LG Installations and Repairs has built a strong local reputation for window installation and repair work in Maidstone. The ME17 postcode base gives the business a clear foothold across the surrounding area. Straightforward in scope and consistently well-regarded by neighbours, it stands out as a reliable option for residential window work.
Rated 4.6 from 58 Google reviews, Southern Glass is a window installation company serving Maidstone and the surrounding area. The consistent customer feedback points to reliable workmanship across residential glazing projects. For those in ME15 and nearby postcodes, it represents a well-regarded local option worth considering.
Maidstone homeowners and commercial clients turn to ADM Improvements for window installation across the ME16 area. The company holds a five-star rating from its Google reviewers, reflecting consistent feedback from local customers. ADM Improvements covers replacement and new-build glazing projects, with a focus on serving the residential properties and businesses that make up their immediate community.
Rated five stars across eight Google reviews, CRS Trade Windows installs windows for residential and commercial properties in Maidstone. The ME15 postcode base places the company well for covering the wider Kent area. A consistent review record of this kind, though modest in volume, points to reliable workmanship rather than scale.
Glaze Ltd is a window installation company serving Maidstone and the surrounding area. Operating from the TN12 postcode, the company holds a five-star Google rating across its reviews, suggesting consistent workmanship on domestic glazing projects. Their website at glazeltd.co.uk provides further detail on the services available.
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 window installation cost in Maidstone?
Prices vary quite a bit depending on frame material, glazing specification, and how many windows you're replacing. A standard uPVC casement window in a mid-terrace typically runs between £400 and £700 per window installed, including removal of the old unit. Aluminium frames cost more, often £600 to £1,000 per window, and timber can go higher still depending on finish and specification. A full house replacement across a three-bedroom semi in areas like Senacre or Loose might come to £3,500 to £6,500 in total, though that range shifts depending on the number of openings, any bay windows, and whether you're opting for triple glazing. Sash window replacements on period properties tend to sit at the upper end. Getting two or three written quotes is normal and sensible. Make sure each quote specifies the same frame type, energy rating, and glazing U-value so you're actually comparing like for like.
Do I need planning permission to replace windows in Maidstone?
Most standard window replacements in Maidstone don't need planning permission, as they're covered under permitted development rights. The main exceptions are if your property is in a conservation area, is a listed building, or sits within an Article 4 Direction zone. Parts of Maidstone town centre and some surrounding villages fall under conservation area designations, and in those areas replacements generally need to match the original style, including the glazing bar pattern on sash windows. If you're unsure, Maidstone Borough Council's planning portal lets you check your postcode before you commission any work. Your installer should also be aware of these requirements, so it's worth raising it directly when getting quotes.
What is FENSA and do I need a certificate when windows are installed?
FENSA is a government-authorised scheme that allows registered window installers to self-certify that their work complies with building regulations, without you needing to apply for a building regulations certificate separately. CERTASS is another approved scheme that works in the same way. When a registered installer fits replacement windows or doors in England, they're required to notify the relevant local authority and issue you a certificate on completion. You'll need that certificate when you sell your home, and a solicitor will ask for it as part of the conveyancing process. If an installer isn't registered with FENSA or CERTASS, you'll need to apply for building regulations approval yourself before work starts, which adds cost and time. Always confirm registration before signing a contract.
What's the difference between double and triple glazing, and is triple glazing worth it in Kent?
Double glazing uses two panes of glass with a cavity filled with argon gas, which is standard across most residential installs. Triple glazing adds a third pane and a second gas-filled cavity, reducing heat loss further. The practical difference shows most in rooms that face north, in properties close to busy roads where noise is a factor, or in homes where heating bills are a genuine concern. A-rated double glazing with a low-E coating is perfectly adequate for most houses in Maidstone's climate, and it costs noticeably less than triple glazing. The payback period on triple glazing is longer, so it tends to make more financial sense if you're doing a full renovation and want to push the thermal performance of the whole building, rather than replacing a few windows in an otherwise standard home.
How long does window installation take, and do I need to be at home?
A single window replacement usually takes around two to three hours per opening, so a full house of eight to ten windows is typically done over one or two days. Installers generally work from the outside where possible, but they'll need access inside to fit the beading and check the seal, so you'd normally need to be home or have someone there. If you're replacing windows in a flat or upper floor, the crew may need to set up ladders or scaffolding, which can affect the timeline. Most installers in the Maidstone area will give you a rough schedule when they confirm the job, and it's worth agreeing in advance how they'll manage dust sheets and access to each room.
How do I choose between window installers in Maidstone and check they're reputable?
Start by confirming the installer is registered with FENSA or CERTASS, as this is the most practical baseline check for glazing work. Both schemes have online registers you can search by company name or postcode. Ask to see evidence of public liability insurance before anyone starts work. Check their reviews on public listings platforms, looking for patterns rather than individual comments, and pay attention to how the company responds to negative feedback. Ask for references from completed jobs, ideally on properties similar to yours in age and construction. If a quote is significantly cheaper than others, ask specifically what's being left out, whether that's disposal of old frames, guarantee length on the units, or the energy rating of the glass being fitted. Installers with a Trust Verified badge on this page have been through an additional verification process covering qualifications, insurance, and trading history, which can save you some of that groundwork.
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