Greater London · England
Sash Windows in Greater London
Need sash windows in Greater London? We can quote for timber box sashes, spring-balanced designs and uPVC sliding sashes, each made to match your openings.
- Guide from £1,495
- 79 towns covered
- Postcode areas BR, CR, DA, E, EC, EN, HA, IG, KT, N, NW, RM, SE, SM, SW, TN, TW, UB, W, WC
Timber sash windows across Greater London
Sash windows that run smoothly need routine care: keep the pulley wheels free of paint, wax or lightly lubricate the running channels, check the cords for fraying, and repaint timber before bare wood shows. Draught brush seals in the beads and meeting rails reduce rattles and heat loss.
Security on sash windows comes from keyed sash locks at the meeting rails, sash stops that limit the opening for ventilation and child safety, laminated glass, and close-fitting staff and parting beads. Ground-floor sashes in older houses are often the weakest point, so locks are worth upgrading during replacement.
In England, Approved Document L allows an alternative where a window must keep a building's character: a centre-pane U-value no worse than 1.2 W/m²K, or single glazing supplemented by low-E secondary glazing. Otherwise a replacement should meet 1.4 W/m²K or Window Energy Rating band B.
Sash window prices depend on size, timber or uPVC, whether you replace the whole frame or just the sashes, the glazing bar pattern, horns and mouldings, glass type and the paint colour. Listed or conservation work that needs matching details costs more. See the guide prices for typical ranges.
Towns we cover for sash windows in Greater London
Choose your town for local details, nearby areas and the postcode districts we cover.
- Acton
- Barking
- Barnes
- Barnet
- Beckenham
- Becontree
- Bexleyheath
- Blackheath
- Brixton
- Bromley
- Camden
- Carshalton
- Catford
- Chelsea
- Chingford
- Chiswick
- Clapham
- Coulsdon
- Cricklewood
- Croydon
- Dagenham
- Ealing
- Edmonton
- Eltham
- Enfield
- Feltham
- Finchley
- Fulham
- Greenford
- Greenwich
- Hackney
- Hammersmith
- Hampton
- Hanworth
- Harrow
- Hayes
- Heston
- Hornchurch
- Hounslow
- Ilford
- Isleworth
- Islington
- Kensington
- Kingston upon Thames
- Lewisham
- Leytonstone
- Mitcham
- Morden
- Muswell Hill
- New Malden
- Northolt
- Orpington
- Peckham
- Purley
- Putney
- Richmond
- Romford
- Ruislip
- Shepherds Bush
- South Croydon
- Southall
- Stamford Hill
- Stratford
- Streatham
- Surbiton
- Sutton
- Thamesmead
- Tottenham
- Twickenham
- Uxbridge
- Wallington
- Walthamstow
- Wandsworth
- Welling
- Wembley
- Willesden
- Wimbledon
- Wood Green
- Woodford Green
What applies in Greater London
Approved Document K requires safety glass in critical locations in England: glazing in doors and in side panels within 300 mm of a door, up to 1500 mm above floor level, and any glazing in walls or partitions up to 800 mm above floor level.
Listed buildings in England need listed building consent for most changes to historic windows or glass, and conservation areas can restrict changes visible from the street. Speak to the council's conservation officer before ordering.
Parts of Greater London are within about 15 km of the coast, where exposure to wind and salt air is worth planning for. Salt-laden wind and driving rain shorten the life of paint on exposed sashes, so coastal timber windows benefit from durable timbers, good factory coatings and regular inspection. Brass or stainless sash furniture resists corrosion better than plated steel near the sea.
Terraced streets and conservation areas often control sash details on front elevations, so check requirements before ordering. Flats need planning permission and freeholder consent, and upper-floor sashes are usually fitted from inside, with careful protection of communal stairs and hallways.
Guide prices
| Typical job | Guide price inc VAT |
|---|---|
| uPVC sliding sash, 900 × 1500 mm | £1,495 – £1,995 |
| Timber-effect uPVC sash, 900 × 1500 mm | £1,795 – £2,295 |
| Painted timber sash, 900 × 1500 mm | £2,595 – £3,295 |
Choosing your sash windows
Spring-balanced timber sash
Timber sashes running on concealed spring balances, giving a slimmer frame where weight pockets are not needed or space is tight.
uPVC sliding sash
Low-maintenance uPVC frames with sculpted profiles and optional woodgrain foils, suited to homes where planning rules allow uPVC.
Glazing bar patterns
Two over two, six over six or other bar layouts, as true divisions or bars bonded to the glass faces.
Replacement sashes only
New double glazed sashes fitted into your existing sound box frame, keeping original linings, architraves and plasterwork.
Sash Windows in Greater London: questions
How much do sash windows cost?
The cost of sash windows depends on size, material, whether you replace the whole frame or only the sashes, the glazing bar pattern, the glass and the finishing details such as horns and mouldings. Timber usually costs more than uPVC, and listed building work costs more again. See the guide prices for typical ranges; the written quote fixes your price.
What maintenance do timber sash windows need?
Timber sash windows need periodic repainting, how often depends on exposure, orientation and colour, plus routine checks of cords, pulleys and seals. Keep paint off the running surfaces, clean the sills and touch up chips before water gets in. Factory-finished timber lasts longer between coats than site-painted joinery, but still benefits from yearly inspection.
Can I have double glazed sash windows in a listed building?
Sometimes, but listed building consent is needed for significant works, and some councils will only accept repair of the original windows or slim double glazing with matching details. Secondary glazing is often accepted where new windows are not. Speak to your council's conservation officer before ordering; we can provide drawings and specifications to support an application.
Do sash windows have to meet building regulations?
Yes. Replacement windows are controlled under building regulations across the UK, and the detail differs between nations. In England, the work can be self-certified by an installer registered with a competent person scheme or approved by building control. Energy, ventilation, safety glazing and escape all apply, though listed buildings may meet some standards only where reasonably practicable.
Which parts of Greater London do you cover for sash windows?
We cover the whole of Greater London, including Islington, Bexleyheath, Barking, Sutton and Croydon, and postcode areas BR, CR, DA, E, EC, EN, HA, IG, KT, N, NW, RM, SE, SM, SW, TN, TW, UB, W, WC. Building rules for sash windows here follow the regulations for England. Enter your postcode on the quote form and we will confirm cover; then a glazier will arrange a free survey before giving you a written quote.
Other glazing services in Greater London
- Replacement Glass in Greater London
- Misted Glass Repair in Greater London
- Emergency Glazing in Greater London
- Safety Glass in Greater London
- Window Repairs in Greater London
- Window Film in Greater London
- uPVC Windows in Greater London
- Aluminium Windows in Greater London
- Composite Doors in Greater London
- Bifold Doors in Greater London
- Sliding Doors in Greater London
- Secondary Glazing in Greater London
- Roof Lanterns in Greater London
- Glass Balustrades in Greater London
- Frameless Glass in Greater London
- Shower Screens in Greater London
- Glass Splashbacks in Greater London
- Bespoke Mirrors in Greater London
- Glass Roofs in Greater London
- Shopfront Glazing in Greater London
- Curtain Walling in Greater London
- Glass Partitions in Greater London
- Property Glazing in Greater London
Get a written quote in Greater London
Free survey for new glazing, clear guide prices and one point of contact for every glazing job.