Double glazing in Kent: compare free local quotes
Compare free written quotes from local installers who cover your ME, CT, TN or DA postcode, for new windows, glass-only units, repairs and secondary glazing. Kent has more listed buildings per home than any other area we cover, so tell us if yours is listed or on the seafront.
17,333 listed building entries, about 24 per 1,000 homes
- Free and no obligation. You decide whether any quote goes ahead
- Local installers who cover your postcode
- Same style on every quote, so timber, sash-look and casement prices compare
How it works
How your Kent enquiry becomes written quotes
Answer six questions
Property type, window count, frame material and timing. Mention listed status or sash windows when you get the call.
We confirm the details
A quick call confirms the details, then your enquiry goes to local installers who cover your part of Kent.
Installers survey and quote
Each one quotes in writing. Check style, consent and Trading Standards Checked status before you choose.
What you can get quoted for
What you can get quoted for in Kent
Kent installers quote for new windows, glass-only replacement and window repairs through the same form:
- New windows in uPVC, aluminium or timber, including sash and heritage styles;
- Glass-only replacement of misted or broken sealed units;
- Repairs to hinges, handles, locks and seals;
- Secondary or acoustic glazing for listed homes and homes under flight paths.
The form asks about windows. Ask the installer at the survey to price a door as well.
Get Kent window quotesFree, no obligation
Areas this page covers
Kent areas this page covers: districts, towns and postcodes
This page covers Kent's 12 districts and Medway, across the ME, CT, TN and DA postcode areas and the Kent end of BR.
| Council | Main towns (postcode districts) |
|---|---|
| Ashford | Ashford (TN23 to TN25), Tenterden (TN30) |
| Canterbury | Canterbury (CT1, CT2), Whitstable (CT5), Herne Bay (CT6) |
| Dartford | Dartford (DA1, DA2), Swanscombe (DA10) |
| Dover | Dover (CT16, CT17), Deal (CT14), Sandwich (CT13) |
| Folkestone and Hythe | Folkestone (CT19, CT20), Hythe (CT21), New Romney (TN28) |
| Gravesham | Gravesend and Northfleet (DA11, DA12) |
| Maidstone | Maidstone (ME14 to ME16), Headcorn (TN27) |
| Medway | Rochester and Strood (ME1, ME2), Chatham (ME4, ME5), Gillingham (ME7, ME8) |
| Sevenoaks | Sevenoaks (TN13 to TN15), Swanley (BR8), Edenbridge (TN8) |
| Swale | Sittingbourne (ME10), Sheerness (ME12), Faversham (ME13) |
| Thanet | Margate (CT9), Broadstairs (CT10), Ramsgate (CT11, CT12) |
| Tonbridge and Malling | Tonbridge (TN9 to TN11), Snodland (ME6), West Malling (ME19) |
| Tunbridge Wells | Royal Tunbridge Wells (TN1 to TN4), Paddock Wood (TN12), Cranbrook (TN17) |
Homes on the London border can also see double glazing in London. Bromley addresses that still read Kent follow London borough rules, covered under double glazing quotes in Bromley.
Local factors
What changes a Kent double glazing quote
Kent quotes turn on six things: listed status, conservation areas, the age of the house, the coast, grants and Gatwick noise. Flag the ones that fit your house on the call, before any installer visits.
| In Kent | What it changes in your quote | Ask or check |
|---|---|---|
| 17,333 listed building entriesHistoric England list | Almost any window change needs listed building consent | Who prepares the consent drawings |
| 520 conservation areasplanning.data.gov.uk | Article 4 directions can remove window rights | Your address with the district council |
| 32.1% of Thanet homes built before 1919Valuation Office Agency | One house can draw sash-look, timber and secondary glazing quotes | The same style priced by every installer |
| North Sea and Channel seafrontsBS 6375-1 standard | Exposed windows need hardware rated for coastal use | The BS 6375-1 weathertightness class |
| 8 of 12 districts on the Warm Homes: Local Grant listDESNZ, July 2026 | Glazing is an eligible measure in those districts | Whether your district is on the list |
| Gatwick Noise Insulation SchemeGatwick Airport | Eligible Kent homes inside the contour can apply | Your postcode, then the Rw figure of each glass |
Heritage
How Kent's listed and conservation homes change your quote
Kent has the densest heritage of any area we cover: 17,333 listed building entries, about 24.0 per 1,000 homes against 14.6 for England. Government planning data also holds 520 conservation areas in the county, across towns such as Canterbury, Faversham and Sandwich and the Weald villages.
A listed building needs listed building consent for almost any window change, and like-for-like timber is often the only option a conservation officer accepts. That job is slower and more specialised than a standard uPVC swap.
Ask each installer which listed-building jobs they have completed. Homes with original sashes should compare sash window replacement side by side with timber casements and secondary glazing.
Get quotes for listed Kent homesFree, no obligation
Planning
Do you need permission to replace windows in Canterbury, Rochester or Tunbridge Wells?
Replacement windows on a Kent house usually need no planning permission when they look similar to the originals, but your district council can remove that right. Kent County Council does not decide it: 12 districts and Medway Council each handle their own conservation areas and Article 4 directions.
| Council | Conservation areas published |
|---|---|
| Canterbury | 98 |
| Maidstone | 45 |
| Tunbridge Wells | 34 |
| Thanet | 27 |
| Medway | 24 |
Canterbury has published street-level Article 4 records, such as Abbots Place and Albert Road. Medway's include Historic Rochester and Star Hill to Sun Pier. An Article 4 direction can withdraw the right to change windows without permission, so check your address with the district council before you order, then ask each installer whether they have handled an Article 4 or conservation-area application there.
Get Article 4 window quotesFree, no obligation
Two coasts
Window quotes for seafront and period homes on the Kent coast
Kent's coastal districts hold some of its oldest homes: 32.1% of properties in Thanet, 29.4% in Dover and 28.0% in Folkestone and Hythe were built before 1919. Inland, Tunbridge Wells reaches 33.8%. Across the whole county council area the figure is 21.9%.
Original sashes, bays and seafront terraces mean one house can draw sash-look uPVC, timber and secondary glazing quotes. Ask every installer to price the same style, or the totals will not compare.
Kent faces the North Sea and the Channel, so ask seafront installers for the BS 6375-1 weathertightness class and hardware rated for coastal use. Southend's seafront homes across the Thames Estuary need the same check: see double glazing quotes in Southend-on-Sea.
Get quotes for a coastal homeFree, no obligation
Grants
Which Kent districts run the Warm Homes: Local Grant?
Eight of Kent's 12 districts appear on the July 2026 Warm Homes: Local Grant list, and glazing is an eligible measure. Four districts are not listed: Folkestone and Hythe, Maidstone, Swale, and Tonbridge and Malling.
Your district decides whether you can apply, so check it on the GOV.UK list of Warm Homes: Local Grant councils before you plan a grant-funded job.
Get quotes while you check grantsFree, no obligation
Repair or replace?
Repair or replace: what Kent homes should price first
Price a repair before a replacement on a listed Kent home, because almost any window change on a listed building needs listed building consent. Ask installers to price repairing the original timber and adding secondary glazing as well as new windows, and ask your district council which of those options needs consent.
On other homes, the choice depends on what has failed. Ask every installer to price these on the same quote:
- repairs to hinges, handles and locks, which take more wind and salt on the coast than inland;
- sealed-unit (glass only) replacement for misted panes in sound frames;
- full-frame replacement, with the U-value and BS 6375-1 weathertightness class of each window.
Get Kent repair and glass quotesFree, no obligation
Before you sign
How to check a double glazing company in Kent
Check a Kent double glazing company in six steps, starting with Trading Standards Checked, the vetted-trader scheme Kent County Council runs for the home improvement sector. Members pass a 50-point check by Kent Trading Standards, and complaints about them are monitored.
- Search Trading Standards Checked: ask each installer whether they are members, then find them on tschecked.kent.gov.uk.
- Search the FENSA or CERTASS register: look the firm up by name or postcode on fensa.org.uk or certass.co.uk. Both are government-authorised schemes, and a registered installer certifies the job under Building Regulations.
- Search Companies House: confirm the company on the quote is active, see when it was incorporated, and check for earlier names or a liquidation.
- Get the guarantee in writing: ask whether it is insurance-backed, so it survives the firm closing. FENSA does not issue guarantees, and Which? recommends a ten-year insurance-backed guarantee.
- Read reviews on Checkatrade and TrustATrader: both rank for Kent searches, so read recent, dated reviews for jobs like yours, not the headline score.
- Compare three written quotes: price the same windows using our guide on how to compare double glazing quotes, then read the paperwork against our contract checklist.
If you sign at home, you usually have at least 14 days to cancel, but made-to-measure windows can be an exception, so check the contract before you sign. Our guide to the double glazing cooling-off period has the detail.
Nearby areas
FAQ
Double glazing in Kent, answered
Is there a government grant for double glazed windows?
The Warm Homes: Local Grant covers glazing in eight of Kent's 12 districts on the July 2026 list. Folkestone and Hythe, Maidstone, Swale, and Tonbridge and Malling are not on it.
Is there a Gatwick noise insulation scheme for Kent homes?
Yes. Gatwick's Noise Insulation Scheme covers eligible homes across Surrey, Sussex and Kent, so check your postcode against the scheme's noise contour on Gatwick's site. Outside the contour, ask installers for acoustic glass (laminated, unequal pane thicknesses or a wider cavity) and the Rw sound reduction figure of each option.
Do I need permission to replace windows in Canterbury?
You need permission when your home is listed or covered by an Article 4 direction that removes window rights. Canterbury has published 98 conservation areas and street-level Article 4 records, so check your address with Canterbury City Council first.
How do I check a double glazing company in Kent?
Search Kent County Council's Trading Standards Checked scheme, then check FENSA or CERTASS registration yourself. Compare at least three written quotes before you sign.
Which double glazing company in the UK is considered the best?
No single company is considered the best for every home. Compare at least three written quotes for the same windows, and check each installer on Trading Standards Checked and the FENSA or CERTASS register yourself.
What is the best time of year to buy double glazing?
Get quotes before you need the windows fitted, so you have time to compare them and sort any consent. Our guide to the best time to buy double glazing covers lead times and fitting weather.
Is it worth replacing 20 year old double glazing?
It is worth pricing new glass and new windows side by side, since misted units in a sound 20-year-old frame can be swapped on their own. On the coast, check the hinges and handles too, because exposed sites put more wind and salt on them than inland streets.
What are the disadvantages of double glazing?
The main disadvantages of double glazing are the upfront cost, sealed units that mist when their seal fails, and a changed look on period seafront homes. Tighter frames also cut natural draughts, so ask how each window is ventilated, for example with trickle vents. On Kent's 17,333 listed entries, almost any window change needs listed building consent, and like-for-like timber is often the only option accepted.
How much should I expect to pay for double glazing?
The price depends on the number of windows, the frame material, the glass and any consent work, so compare written quotes, and see what double glazing costs in each UK region on our sister site.
Compare Kent quotes for the same windows
One short form. Local installers who cover your postcode survey your home and quote in writing.
Get free quotes
Sources
- Historic England list via planning.data.gov.uk (listed buildings, conservation areas, Article 4 directions; dataset flagged incomplete): planning.data.gov.uk
- Kent County Council heritage map layers (conservation areas are designated by district councils): heritage.kent.gov.uk
- Valuation Office Agency, Council Tax: stock of properties, table CTSOP4.1 (build period): gov.uk
- Planning Portal, doors and windows: planningportal.co.uk
- Gatwick Airport, reducing noise and the Noise Insulation Scheme: gatwickairport.com
- DESNZ, Warm Homes: Local Grant successful local authorities (updated 2 July 2026): gov.uk
- Kent County Council, home energy efficiency grants: kent.gov.uk
- Kent County Council, Trading Standards Checked: tschecked.kent.gov.uk
- Consumer Contracts Regulations 2013, regulation 28 (made-to-measure goods): legislation.gov.uk
- BS 6375-1, the UK standard for window weathertightness (air, water and wind resistance)
- GOV.UK, competent person schemes (FENSA and CERTASS authorised for replacement windows): gov.uk
- FENSA, homeowner advice (certificates, guarantees, installer search): fensa.org.uk; CERTASS, compliance certificates: certass.co.uk
- Companies House, company search: gov.uk
- Which?, your rights when buying double glazing (ten-year insurance-backed guarantee): which.co.uk