Window Replacement

If your windows are draughty, misted, hard to open or simply dated, professional window replacement in London can transform your home's comfort, security and appearance. Replacing old units with modern energy-efficient windows cuts heat loss, lowers bills, reduces noise and refreshes your property's kerb appeal. At Lord Glazing we replace windows of every style and material across the capital, from single Victorian terraces to whole-house upgrades. With 15+ years' experience, 5,000+ completed projects and a 4.9★ rating from over 200 reviews, we make replacing your windows smooth, tidy and stress-free.

Why choose window replacement in London

Older windows are often the weakest link in a London home's thermal envelope. Failed seals cause misting between panes, rotten timber lets in draughts, and single glazing offers little against noise or heat loss. New windows solve all of this in one upgrade. As a FENSA registered installer and GGF member that is TrustMark approved and Checkatrade verified, we guarantee Building Regulations compliance and provide a FENSA certificate for every installation — important for your peace of mind and for any future house sale. We are fully insured, and every replacement is backed by our 10-year guarantee.

Key benefits

• Lower energy bills — A-rated replacement windows dramatically reduce heat loss.
• No more misting or draughts — modern sealed units and tight frames eliminate common faults.
• Better security — multi-point locks and toughened glass protect your home.
• Quieter rooms — acoustic glass options reduce noise from London's busy streets.
• Improved appearance — fresh frames and clean lines lift your property instantly.
• Added value — efficient, attractive windows are a strong selling point.

Options & materials

We replace windows in a full range of materials and styles to match your home:

• uPVC — durable, efficient and great value, in white, woodgrain and colour finishes.
• Aluminium — slim, strong frames for a modern look and large glazed areas.
• Timber — natural character for period and conservation-area homes.
• Styles — casement, tilt-and-turn, bay and bow, flush sash and traditional sliding sash.
• Glass — double or triple glazing, acoustic, obscured and self-cleaning options.

Pair your new windows with energy-saving double glazing or, for heritage homes, our authentic sash windows.

Our window replacement process

1. Free survey & advice — we measure, assess and recommend the best windows for your property.
2. Fixed-price quote — transparent pricing with no surprises.
3. Made-to-measure manufacture — your windows are built precisely to size and specification.
4. Careful removal & fitting — our fully insured team removes the old units and installs the new ones, making good around each opening.
5. Inspection & certification — we test everything, clean up, and issue your FENSA certificate and 10-year guarantee.

Window replacement across London

We replace windows across all 33 London boroughs. Our coverage spans North London (Barnet, Enfield, Haringey, Camden, Islington), South London (Croydon, Bromley, Lambeth, Southwark, Lewisham, Wandsworth, Merton, Sutton, Kingston, Richmond), East London (Tower Hamlets, Hackney, Newham, Waltham Forest, Redbridge, Barking & Dagenham, Havering, Greenwich, Bexley), West London (Ealing, Hounslow, Hillingdon, Brent, Harrow, Hammersmith & Fulham) and Central London (Westminster, Kensington & Chelsea, the City of London). Wherever you live, a local Lord Glazing team can help.

When is the right time to replace your windows?

It is not always obvious when windows have reached the end of their life, but there are clear warning signs. Persistent misting or condensation between the panes means the sealed unit has failed and can no longer insulate properly. Draughts, difficulty opening or locking, soft or rotten timber, peeling finishes and rising heating bills all point the same way. Older single-glazed or early double-glazed windows also offer little protection against London's traffic and street noise. Replacing them is usually far more cost-effective than repeated repairs, and it delivers an immediate improvement in comfort, security and appearance. During your free no-obligation survey we give you an honest assessment — if a repair will do, we will say so, and if replacement makes more sense we will explain why.

Why London homeowners choose Lord Glazing

Replacing windows is a significant investment, so the installer matters. With 15+ years' experience and more than 5,000 completed projects, Lord Glazing is FENSA registered, a GGF member, TrustMark approved and Checkatrade verified, and fully insured. We provide transparent fixed pricing, a FENSA certificate on completion and a 10-year guarantee on every installation. Our 4.9★ rating from over 200 reviews is built on clear communication, careful fitting and a tidy finish — from a single window to a complete home.

Pricing guide

Window replacement with Lord Glazing starts from £300 per window, with the final price determined by size, material, glass specification and the number of windows. We offer transparent, fixed pricing so you always know where you stand. Get a free quote or call 020 3633 8141. You can also contact us at info@lordglazing.co.uk to arrange a survey.

Frequently Asked Questions

How do I know if I need new windows?

Tell-tale signs include misting between the panes, draughts, difficulty opening or locking, rotten frames and rising heating bills. If you notice these, replacement is usually the most cost-effective fix.

How long does it take to replace windows?

Most homes are completed within one to three days depending on the number of windows. We work efficiently and keep disruption to a minimum.

Do replacement windows need FENSA certification?

Yes — replacement windows must comply with Building Regulations. As a FENSA registered installer we handle this for you and provide the certificate automatically.

Can you match my existing window style?

In most cases, yes. We offer casement, sash, bay and flush styles in uPVC, aluminium and timber, including heritage profiles for period and conservation-area homes.

Are your installers qualified and insured?

Every fitter is experienced and fully insured, and Lord Glazing is FENSA registered, a GGF member, TrustMark approved and Checkatrade verified — backed by 5,000+ completed projects.