Sash Windows

Few features define a London home like a beautiful set of sash windows. From Georgian townhouses to Victorian and Edwardian terraces, the elegant vertical sliding sash is part of the capital's architectural identity. At Lord Glazing we specialise in sash windows in London — restoring and draught-proofing original timber sashes, and supplying authentic replacement sash windows in timber and uPVC that combine period charm with modern energy efficiency. With 15+ years' experience and 5,000+ completed projects, we help homeowners keep the character of their property while enjoying a warmer, quieter and more secure home.

Why choose sash windows in London

Sash windows are integral to the look of period London streets, and in many conservation areas their style must be retained. The challenge is that original sashes are often draughty, rattly and single glazed. We bridge that gap — either by sensitively restoring and draught-proofing what you have, or by fitting new sashes that replicate traditional proportions, glazing bars and run-through horns while adding double glazing and discreet modern locking. As a FENSA registered, GGF member company that is TrustMark approved and Checkatrade verified, we deliver heritage-sympathetic work to a high standard, reflected in our 4.9★ rating from over 200 reviews.

Key benefits

• Authentic appearance — period-correct proportions, glazing bars and finishes.
• Smooth operation — modern spring or traditional cord-and-weight balances for effortless sliding.
• Draught-proofing — discreet seals eliminate rattles and cold draughts.
• Energy efficiency — slimline double glazing keeps heritage homes warmer.
• Noise reduction — quieter rooms even on busy London roads.
• Improved security — concealed sash locks and toughened glass options.

Options & materials

We tailor every sash window project to your property and any conservation requirements:

• Timber sash windows — traditional engineered hardwood or softwood for authentic heritage homes.
• uPVC sash windows — low-maintenance vertical sliders with a convincing traditional look.
• Restoration & draught-proofing — repair, overhaul and seal your existing sashes.
• Slimline double glazing — energy efficiency within slender period-style profiles.
• Finishes — astragal bars, run-through horns and a wide colour palette.

For more discreet upgrades to listed homes, consider our secondary glazing, or explore a wider window replacement across the whole property.

Our sash window installation process

1. Free survey — we inspect your existing sashes and advise on repair versus replacement.
2. Fixed-price quote — clear, transparent costs with no obligation.
3. Bespoke manufacture — new sashes made to match your home's exact style and dimensions.
4. Skilled installation — our fully insured craftsmen fit or restore with care for the surrounding joinery.
5. Finishing & guarantee — we test the slide and locks, tidy up, and provide your 10-year guarantee.

Sash windows across London

We work on sash windows across all 33 London boroughs, with particular demand in period-rich areas. Our coverage includes Central London (Westminster, Kensington & Chelsea, the City of London), North London (Camden, Islington, Haringey, Barnet, Enfield), South London (Lambeth, Southwark, Wandsworth, Lewisham, Croydon, Bromley, Merton, Sutton, Kingston, Richmond), East London (Tower Hamlets, Hackney, Newham, Waltham Forest, Redbridge, Barking & Dagenham, Havering, Greenwich, Bexley) and West London (Ealing, Hounslow, Hillingdon, Brent, Harrow, Hammersmith & Fulham).

Repair, restore or replace your sash windows?

One of the first questions we help London homeowners answer is whether to restore their existing sashes or fit new ones. Many original Georgian, Victorian and Edwardian sash windows are made from dense, slow-grown timber that is well worth saving. Where the frames are sound, we can overhaul the mechanism, splice in new sections of timber, re-cord or re-spring the balances and add discreet draught-proofing — preserving the heritage of the property at a lower cost than replacement. Where decay is extensive or the windows have been poorly altered over the years, new sashes that faithfully replicate the original detailing are often the better long-term answer. We give honest, no-pressure advice during your free no-obligation survey, drawing on 15+ years' experience with the capital's period homes.

Why London homeowners choose Lord Glazing

Sash window work demands craftsmanship and care, and our track record reflects that. With more than 5,000 completed projects and a 4.9★ rating from over 200 reviews, Lord Glazing is trusted across London's period neighbourhoods. We are FENSA registered, a GGF member, TrustMark approved, Checkatrade verified and fully insured, with transparent fixed pricing and a 10-year guarantee on our work. Whether you are restoring a single bay or re-sashing a whole terrace, you can expect respectful, high-quality results.

Pricing guide

Sash window work with Lord Glazing starts from £80 for draught-proofing and repair services, while full replacement sashes are priced according to size, material and specification. Whatever the scope, we provide transparent, fixed pricing. Get a free quote or call 020 3633 8141, or contact us at info@lordglazing.co.uk.

Frequently Asked Questions

Can my original sash windows be repaired rather than replaced?

Often yes. Many original sashes can be overhauled, draught-proofed and re-corded to slide smoothly and seal well, preserving the character of your home at a lower cost than replacement.

Can sash windows be double glazed?

Yes. We fit slimline double glazing into both timber and uPVC sashes, giving you modern warmth and noise reduction while keeping authentic slender sightlines.

Will new sash windows match my period property?

Absolutely. We replicate traditional details such as glazing bars, run-through horns and proportions, so new sashes blend seamlessly with the original architecture.

Do sash windows need planning permission?

Replacing like-for-like is usually permitted development, but listed buildings and conservation areas may have restrictions. We advise on this during the survey and supply heritage-appropriate designs.

How do you stop sash windows rattling?

We install discreet brush and compression seals during draught-proofing or replacement, which remove rattles, block draughts and improve insulation without spoiling the look.