Flats and apartments · Hertfordshire
Triple glazing for flats and apartments in Stevenage
If you live in Stevenage (SG1) and want flat and apartment triple glazing, start with a free survey: every opening measured, then a written quote that fixes the price.
Window replacement for flats, with the consents sorted first. Before replacing windows in a flat, check two things.
Winter light and glass choice in Stevenage
Winter days in Stevenage are short: about 7 h 46 min of daylight on 21 December, with the sun peaking near 15°. That low angle reaches deep into south-facing rooms, so we match the glass to each elevation rather than using one spec for the whole house.
Guide prices in Stevenage
| Guide | Supply and fit, inc VAT |
|---|---|
| One window medium uPVC window, fitted from inside | £945 – £1,195 |
| 2-bed flat 5 medium windows | £4,595 – £5,695 |
| 2-bed flat, aluminium 5 medium windows | £7,495 – £9,295 |
Guide prices. Your written quote after the free survey fixes the price for the specification shown.
Rules for flats and apartments in England
The rules for replacement windows in England are set by Approved Document L (2021 edition, with 2023 amendments): 1.4 W/m²K, or a Window Energy Rating of band B or better. Replacement windows are a controlled fitting. A competent person scheme installer (such as FENSA or Certass) self-certifies the work and notifies the council within 30 days; otherwise a building control body approves it.
Planning: Replacing windows on a house is normally permitted development if the new ones look similar. New upper-floor windows in a side wall must be obscure glazed and fixed, or open only above 1.7 m. Flats and maisonettes have no householder permitted development rights, so a change that alters their appearance needs planning permission. An Article 4 direction in a conservation area may mean permission is needed, and listed buildings need listed building consent.
How it works
You will know exactly what you are buying: the quote states the unit build-up, frame, finish, fitting work and how Building Regulations compliance is handled. On fitting day each opening is replaced and closed up before the team moves on.
- Every opening measured, including escape and vent needs
- Frames rated for the weight of triple glass
- Old windows removed and taken away
- Each opening closed up the same day
Questions from Stevenage
Can windows in a flat be fitted from inside?
Often yes, which avoids scaffolding. It depends on the window design and access, checked on survey.
What about tall blocks?
Higher-risk buildings (18 m or 7 storeys and over in England) have extra building safety requirements. Talk to your building’s accountable person first.
How long does it take to get flat and apartment triple glazing fitted in Stevenage?
After the survey, typical manufacture time is 4 to 7 weeks, and most homes are fitted in 1 to 4 days.
Do I need permission for flat and apartment triple glazing in Stevenage?
In England, like-for-like replacements on a house are normally permitted development; flats need permission if the change alters their appearance, Article 4 areas may need permission, and listed buildings need listed building consent. Check whether your street is in a conservation area or covered by an Article 4 direction before changing the style.
Nearby
Nearby towns on our list include Hitchin (8 km), Letchworth Garden City (9 km), Welwyn Garden City (11 km) and Harpenden (14 km).
Other products in Stevenage
- uPVC windows
- Aluminium windows
- Timber windows
- Alu-clad timber windows
- Casement windows
- Flush casement windows
- Tilt and turn windows
- Sash windows
- Bay and bow windows
- Fixed and picture windows
- Composite front doors
- French doors
- Sliding patio doors
- Bifold doors
- Glass-only replacement
- Acoustic triple glazing
- Security glazing
- Whole-house replacement
- New builds and self-builds
- Period homes and conservation areas
- Passivhaus and EnerPHit
Flats and apartments in Stevenage: book your free survey
Written quote fixed for the specification, after a free survey. Building Regulations sign-off by a competent person scheme installer or building control, as the law requires in England.