Double glazing & home improvement costs in Dartford & North-West Kent
Last reviewed: July 2026 · DA postcode area · Prices are fitted (supply + installation), incl. VAT
We match new and replacement windows, external doors enquiries across the DA postcode area — Dartford, Bexleyheath, Sidcup, Welling, Erith, Gravesend, Swanscombe and the surrounding villages. Dartford and Bexleyheath’s inter-war suburbs plus Gravesend’s older terraces make DA a high-volume replacement area, priced at London-edge labour rates.
Window prices in Dartford (per window, fitted)
| Frame material | Price per window | Notes |
|---|---|---|
| uPVC casement | £525 – £875 | Best value; the UK default |
| Aluminium | £775 – £1,300 | Slim frames, modern look |
| Timber | £1,000 – £1,775 | Period homes & conservation areas |
Whole-house jobs come in cheaper per window — see how counts, property type and materials move the price in our full window cost guide, or get a range for your exact home with the instant estimate tool.
External door prices in Dartford (fitted)
| Door type | Fitted price |
|---|---|
| uPVC front or back door | £950 – £1,650 |
| Composite front door | £1,050 – £2,350 |
| French doors | £1,425 – £2,825 |
| Sliding patio doors | £1,650 – £3,300 |
Full breakdown by material and style in the door cost guide, or price your door with the estimate tool.
Towns we cover in the DA postcode area
Dartford · Bexleyheath · Sidcup · Welling · Erith · Gravesend · Swanscombe — plus the villages and rural districts on DA postcodes between them. Coverage is by postcode, so if your outcode starts with DA, the estimate tool will price your job and match you with companies that install there.
How it works
- Instant estimate first — answer a few questions and see a realistic fitted price range for your home, no contact details needed.
- Quotes only if you ask — with your consent we share your enquiry with up to 4 FENSA/CERTASS-registered installation companies and vetted networks covering Dartford.
- No obligation — compare quotes against the bands above and walk away if none stack up. See how we make money.
Frequently asked questions
How much does double glazing cost in Dartford?
A standard uPVC casement window costs around £525–£875 fitted in the DA postcode area, aluminium £775–£1,300 and timber £1,000–£1,775 per window. Multi-window installs come in cheaper per window because survey, scaffold and labour are shared across the job.
Do you cover Dartford and Bexleyheath?
Yes — the installer networks we work with actively cover the whole DA postcode area, including Dartford, Bexleyheath, Sidcup, Welling, Erith, Gravesend, Swanscombe. Enter your postcode in the estimate tool and we match your enquiry to companies that install in your exact district.
Who actually fits the windows?
SnugQuote is a price-comparison and introduction service, not an installer. Your enquiry goes to up to 4 FENSA/CERTASS-registered installation companies and vetted home-improvement networks that operate across Dartford & North-West Kent — they quote, you compare, and there is no obligation to proceed.
Sources: price bands compiled July 2026 from published UK installer price guides (Checkatrade, Which?, FMB cost guides), adjusted with the regional labour index used across this site, and cross-checked against regional quote data. Installer certification: FENSA. See all areas we cover.