Double glazing & home improvement costs in Stevenage & North Hertfordshire
Last reviewed: July 2026 · SG postcode area · Prices are fitted (supply + installation), incl. VAT
We match new and replacement windows enquiries across the SG postcode area — Stevenage, Hitchin, Letchworth Garden City, Baldock, Royston, Hertford, Ware and the surrounding villages. Letchworth’s garden-city heritage rules often steer window styles, while Stevenage new-town stock takes standard sizes — the SG area covers both extremes.
Window prices in Stevenage (per window, fitted)
| Frame material | Price per window | Notes |
|---|---|---|
| uPVC casement | £450 – £750 | Best value; the UK default |
| Aluminium | £650 – £1,100 | Slim frames, modern look |
| Timber | £850 – £1,500 | 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.
Towns we cover in the SG postcode area
Stevenage · Hitchin · Letchworth Garden City · Baldock · Royston · Hertford · Ware — plus the villages and rural districts on SG postcodes between them. Coverage is by postcode, so if your outcode starts with SG, the estimate tool will price your job and match you with companies that install there.
How well insulated are Stevenage homes?
The official EPC register shows 602 of 3,084 certificated homes (20%) in the SG1 district (central Stevenage) are rated band D or below — the bands where surveyors most often flag single glazing, failed units or poor draught-proofing (latest certificate per home, 10-year window, register checked 2026-08-05). The street segments with the most D–G rated homes:
| Street | Postcode | Homes rated D–G | Check it yourself |
|---|---|---|---|
| Brickdale House | SG1 1AS | 9 of 54 | public register |
| Newcastle Close | SG1 4TL | 8 of 9 | public register |
| St. Albans Drive | SG1 4RU | 7 of 26 | public register |
| Skyline House | SG1 1AX | 6 of 15 | public register |
| Alleyns Road | SG1 3PP | 5 of 5 | public register |
If your home is rated D or below, upgrading old or failed glazing is one of the fixes EPC assessors most commonly recommend — check your own street with the postcode energy ratings checker, see what that saves in our energy savings guide, or price the job for your exact home with the instant estimate tool.
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 Stevenage.
- 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 Stevenage?
A standard uPVC casement window costs around £450–£750 fitted in the SG postcode area, aluminium £650–£1,100 and timber £850–£1,500 per window. Multi-window installs come in cheaper per window because survey, scaffold and labour are shared across the job.
Do you cover Stevenage and Hitchin?
Yes — the installer networks we work with actively cover the whole SG postcode area, including Stevenage, Hitchin, Letchworth Garden City, Baldock, Royston, Hertford, Ware. 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 Stevenage & North Hertfordshire — 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.