Window Fitters in Greater London (39)

Looking to upgrade your windows or deal with draughts once and for all? Whether it’s a single replacement or a full home refresh, hiring the right window fitter in London can make all the difference.

Rated window fitting services in London

At Checkatrade, we make it easy to find rated and reviewed window fitters covering your local area of London. From UPVC and aluminium windows to sash, bay or Velux installations, you can compare quotes, check customer reviews and get in touch with independent window fitters in London in minutes.

Use our search above to find window fitters in London, or try our free Request a Quote tool to hear back from available window companies near you.

What to expect from hiring a window fitter in London

Whether you’re after better insulation or a fresh look, here’s what you can expect.

Common window jobs in London:

• Full house window replacement (UPVC, aluminium or timber)
• Double glazing upgrades
• Velux or skylight fitting
• Bay or bow window installation
• Curved or bespoke window fitting

Average window fitting costs in London

Expect to pay between £1701 and £4431 , with an average cost of £2758 per project.

Exact costs will vary depending on the window size, window type, and job complexity. For example, getting a full house of windows fitted will cost more than replacing a single frame or pane of glass.

Here are some additional costs for popular window fitting services in London.

Bay windows installation:

£4306 on average, with prices typically starting at £3104 up to £6014

Aluminium windows installation:

£7415 on average, with prices typically starting at £4894 up to £11197

Wooden sash window installation:

£6610 on average, with prices typically starting at £4416 up to £10026

UPVC windows installation:

£5518 on average, with prices typically starting at £3856 up to £7916

Triple glazing installation:

£3781 on average, with prices typically starting at £2539 up to £5642

Need an accurate cost estimation? Use our Job Value Estimator tool to calculate how much your window fitting project will cost you.

Find out more about costs in our guide to window fitting prices.

What affects the cost?

• Window size, type and material
• Number of windows
• Access requirements (e.g. scaffolding)
• Glazing type (single, double or triple)

What’s included in a typical quote?

• Supply of frames and glazing
• Removal and disposal of old windows
• Installation and finishing
• FENSA certification (if applicable)

How long does window fitting take?

On average, fitting a window takes 1 - 2 hours. A full property can usually be completed in 1 - 3 days, depending on the size and complexity.

Qualifications to check for

• FENSA or CERTASS registration (for building regulations compliance)
• Public Liability Insurance
• Reviews and references from previous customers

Window fitters in London: Homeowners vs renters

Homeowners:

If you own your property, you’re responsible for window upgrades. If you're changing the style or layout, check if you need planning permission, particularly in conservation areas or listed buildings.

Always ensure your installer provides a FENSA certificate for replacement work. It proves compliance and can help with future property sales.

Renters:

If you rent your home and have issues with your windows (draughts, condensation, broken locks), your landlord is responsible for repairs or replacements.

Not sure how to raise it? Start by reporting the issue in writing and include photos. If you don’t hear back, your local council’s housing department can offer support.

Emergency window fitters in London

Smash, crack or urgent draught to deal with? Some window fitters in London offer emergency callouts for:

• Broken or smashed windows
• Damaged window locks
• Failed double glazing units (mist or condensation inside panes)

Use our search tool to find emergency window fitting services in London.

Find the right window fitter in London for the job you need

Find a specialist for window fitting or replacement

Whether they specialise in just windows or are more general in the services they offer, skilled tradespeople and window installers in London can help with:

• Window replacements
• Window repairs
• Velux/skylight installations
• Window draught proofing
• Glass upgrades (single to double/triple)
• Replacing windows and doors
• Curved windows
• Window installation for extensions/conversions

Not sure who to choose? Use Checkatrade to browse verified window fitters covering your local area of London, compare reviews, and request quotes in minutes.