Double glazing prices in Kent
Kent quotes sit around or slightly below the national average, but the spread inside the county is wide: the London border belt pays up to 15% more, and coastal towns often pay less.
Key takeaways
- A typical three-bed semi in Kent with eight windows and a door generally quotes between £5,800 and £8,400.
- Dartford, Swanley and Sevenoaks run 10% to 15% above mid-Kent, driven by labour and demand.
- Thanet, Dover and Folkestone typically come in 5% to 10% below the county average.
- Period and conservation-area homes raise cost through sash windows, colour matching and consent.
- Coastal exposure matters more than price here: wind-driven rain and salt shorten hardware life.
Kent is a large and uneven market. A homeowner in Swanley and a homeowner in Ramsgate can buy the same specification of window and pay noticeably different prices, while both sit within 45 minutes of each other. The differences come from labour rates, installer density, property age and how much non-standard work the housing stock needs.
What double glazing costs in Kent
| Job | Typical Kent range | Notes |
|---|---|---|
| 3 windows, terraced house | £3,400 – £4,800 | Standard casements, white uPVC |
| 5 windows, semi-detached | £3,200 – £4,600 | Mid-range A-rated units |
| 8 windows + 1 door, 3-bed semi | £5,800 – £8,400 | Most common Kent enquiry |
| Full house, 12 windows + 2 doors | £8,500 – £12,500 | Depends on sizes and openings |
| Bay window | £2,400 – £4,200 | Structural work pushes the top end |
| Composite front door | £900 – £1,600 | Fitted, with hardware |
| 3-panel bi-fold door | £3,800 – £6,500 | Aluminium at the top end |
| Conservatory roof replacement | £4,000 – £8,500 | Solid or tiled roof |
How prices vary across the county
| Area | Pattern against county average | Why |
|---|---|---|
| Dartford, Swanley, Sevenoaks | 10% – 15% above | London labour market and commuter demand |
| Tunbridge Wells, Tonbridge | 5% – 10% above | Older housing stock, sash work, higher labour |
| Maidstone, Ashford, Canterbury | Around average | Largest installer competition |
| Sittingbourne, Faversham, Whitstable | Around average | Mixed stock, good coverage |
| Margate, Ramsgate, Dover, Folkestone | 5% – 10% below | Lower labour rates, dense installer coverage |
Treat this as a directional pattern rather than a price list. The single biggest factor is still how many comparable quotes you collect in your own postcode: three quotes in ME or CT postcodes normally lands a homeowner within a few per cent of the local market rate.
Period homes and conservation areas
- Sash windows are the main cost driver: timber or sash-replacement uPVC runs £900 to £1,800 per window fitted.
- Conservation areas across Canterbury, Rochester, Faversham and parts of Tunbridge Wells can restrict frame material, profile and glazing bars.
- Article 4 directions remove permitted development rights in some Kent conservation areas, so replacing windows may need consent.
- Colour matching to existing joinery, arches and shaped heads adds cost on Victorian and Edwardian stock.
- Flush casements and heritage-style profiles are worth pricing alongside standard casements on older homes.
Coastal properties: Thanet, Dover and Folkestone
Salt and wind-driven rain are the practical issues on the Kent coast, not price. Hardware corrodes faster, external sealant fails sooner, and south-westerly gales test the weather seal on any badly fitted frame. Ask two direct questions: what grade of hardware is being supplied, and what is the guarantee on sealant and weathertightness in an exposed position?
What to check on a Kent quote
- FENSA or CERTASS registration number, verified independently, since you may need the certificate when you sell.
- Scaffolding shown as included or separately priced, particularly on two-storey and bay work.
- Making good defined: plaster repair, architraves and external pointing.
- Consent position confirmed in writing if the property is in a conservation area or listed.
- Guarantee length with named insurance backing, not just a promise.
How to get a fair Kent price
Three quotes for the same written specification, all from firms registered to work in your postcode, is the reliable method. Kent has a deep pool of local installers, which means competition is real if you invite it. Take the highest and lowest out of the decision, and compare the middle quote against the two extremes on scope rather than on headline total.
Towns covered in Kent
Installers on our network cover Kent postcodes CT, DA, ME, TN, BR, RM, including:
- Maidstone
- Canterbury
- Ashford
- Dartford
- Gravesend
- Sevenoaks
- Royal Tunbridge Wells
- Tonbridge
- Chatham
- Rochester
- Gillingham
- Sittingbourne
- Faversham
- Whitstable
- Herne Bay
- Margate
- Ramsgate
- Broadstairs
- Deal
- Dover
- Folkestone
- New Romney
- Swanley
- Edenbridge
Frequently asked questions
A typical three-bed semi with eight windows and a door quotes between £5,800 and £8,400 fitted, including VAT. Smaller jobs of three to five windows usually land between £3,200 and £4,800.
The London border belt, particularly Dartford, Swanley and Sevenoaks, typically runs 10% to 15% above the county average because of labour rates and demand.
Often yes. Conservation areas in Canterbury, Rochester and Faversham can restrict materials and appearance, and some are covered by Article 4 directions. Check with the local planning authority before ordering.
Yes. Sash replacements typically cost £900 to £1,800 per window fitted, which is roughly double a standard casement, especially on period homes in Tunbridge Wells and Tonbridge.
Three, all for the same written specification. Kent has enough registered installers that competitive quotes are realistic in almost every postcode.
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