Projects
Triple glazing for period homes and conservation areas
Period homes are often the coldest, and the most constrained. We supply heritage-style flush casements and sashes in timber and woodgrain uPVC, with slim glazing bars, and help you work out what consent you need before anything is ordered. Where triple glass would mean frames too chunky for the building, we will say so.
Summary
In a conservation area, replacing windows on a house is often permitted development if the new windows look similar to the old ones, but councils can remove those rights with an Article 4 direction. Listed buildings always need listed building consent. Heritage-style flush and sash designs can be triple glazed, within the limits of slim frames.
What you get
| Styles | Flush casement, storm-proof casement, sliding sash |
|---|---|
| Frames | Painted timber, woodgrain uPVC |
| Details | Slim astragal bars, putty-style beads, horns |
| Glass | Triple where the sections allow; slim units otherwise |
| Consent | Advice on permitted development, Article 4 and listed building consent |
| Typical lead time | 6 to 10 weeks |
Guide prices
Guide prices for typical projects; your quote is built from your own survey or drawings.
Flush casement, woodgrain uPVC
medium window
£1,295 – £1,595inc VAT · £1,080 – £1,330 ex VAT
- Sash sits flush in the frame
- Woodgrain or heritage colour
- Fitted and made good
Timber flush casement
medium window
£2,295 – £2,895inc VAT · £1,910 – £2,410 ex VAT
- Engineered timber, factory painted
- Slim triple unit where the design allows
- Fitted and made good
Timber sliding sash
medium sash window
£3,395 – £4,195inc VAT · £2,830 – £3,495 ex VAT
- Box-sash look, balanced sashes
- Horns and bars to match
- Fitted and made good
Guide prices, supply and fit. The written quote after your survey fixes the price for the specification shown; anything extra is agreed with you first.
Is it right for your home?
A good fit for
- Victorian, Edwardian and cottage-style homes
- Conservation areas without an Article 4 direction on windows
- Owners who want warmth without losing character
Think twice if
- Listed buildings, where replacement is often refused in favour of repair or secondary glazing
- Article 4 areas, where an application is needed first
Options
- Timber or woodgrain finishes
- Heritage colours
- Traditional ironmongery
- Slim double units where triple is too thick
- Secondary glazing for listed homes
What your council looks for
Most conservation teams look at the material, the opening style, the frame and glazing-bar thickness, and the colour. Matching the original pattern on the front elevation is usually the key. We can supply drawings and samples for an application.
Scotland, Wales and Northern Ireland
Rules differ by nation. In Scotland, permitted development for replacement windows was widened in May 2024, including in many conservation areas, with front elevations expected to match closely. In Wales and Northern Ireland, check with the council planning team. Listed buildings need consent in every nation.
Building Regulations by nation
| Nation | Replacement windows | Sign-off |
|---|---|---|
| England | 1.4 W/m²K, or a Window Energy Rating of band B or better | Competent person scheme or building control |
| Wales | 1.4 W/m²K, or a Window Energy Rating of band B or better | Competent person scheme or building control |
| Scotland | 1.6 W/m²K | No building warrant for a straight replacement; must meet the standards |
| Northern Ireland | 1.6 W/m²K, or a Window Energy Rating of band C or better | No building notice for a straight replacement; must comply |
Full regulations guide, with sources →
Questions about period homes and conservation areas
Can I have triple glazing in a conservation area?
Often yes, if the new windows match the look of the old ones and there is no Article 4 direction. Check with your council first.
Can I put triple glazing in a listed building?
Usually not as a replacement. Listed building consent is needed and is often refused for original windows. Secondary glazing is the common alternative.
Will heritage-style frames look chunky with triple glass?
They can if the sections are too slim for a full triple unit. We will show you the frame sizes and, if needed, offer a slim high-performance unit instead.
Do you help with planning applications?
We provide drawings, specifications and samples you can use in an application. The application is made by you or your agent.
Related products
Flush casement windows
From £845Sashes that sit flush in the frame, like traditional timber windows.
Learn more →
Sash windows
From £1,295Vertical sliding sashes for Victorian and Georgian homes, where the design allows.
Learn more →
Timber windows
From £1,295Engineered timber frames, factory finished, for period homes and natural looks.
Learn more →
Bay and bow windows
From £2,995Three- and five-light bays, with the structure checked before fitting.
Learn more →Period homes and conservation areas by area
England
- Bedfordshire
- Berkshire
- Bristol
- Buckinghamshire
- Cambridgeshire
- Cheshire
- Cornwall
- County Durham
- Cumbria
- Derbyshire
- Devon
- Dorset
- East Riding of Yorkshire
- East Sussex
- Essex
- Gloucestershire
- Greater London
- Greater Manchester
- Hampshire
- Herefordshire
- Hertfordshire
- Isle of Wight
- Kent
- Lancashire
- Leicestershire
- Lincolnshire
- Merseyside
- Norfolk
- North Yorkshire
- Northamptonshire
- Northumberland
- Nottinghamshire
- Oxfordshire
- Rutland
- Shropshire
- Somerset
- South Yorkshire
- Staffordshire
- Suffolk
- Surrey
- Tyne and Wear
- Warwickshire
- West Midlands
- West Sussex
- West Yorkshire
- Wiltshire
- Worcestershire
Scotland
Period homes and conservation areas: get your guide price
Use the guide-price tool, or book a free survey for a written quote that fixes the price.