UPVC double glazed windows in London
From £450
| Service | Typical price in London |
|---|---|
| UPVC double glazed windows | £563 - £1,125 |
| Sash windows (UPVC & timber) | £1,125 - £3,000 |
| French & patio doors | £1,625 - £4,000 |
| Bay & bow windows | £2,000 - £4,750 |
| Secondary glazing | £438 - £1,188 |
UPVC double glazing quotes across London’s 33 boroughs
London’s window market is dominated by Victorian and Edwardian terraces in the inner boroughs and interwar semis in outer London, so a straight UPVC swap is rarely the whole story here. Legacy Windows is a quote comparison service, not an installer: we match you with vetted FENSA or CERTASS firms who already work in your postcode, so a Camden brief lands on a very different desk to a Croydon one.
Why locals in London choose Legacy Windows
- Prices reflect the London tradesman rate, not a national average: budget £563 to £1,125 per fitted casement in 2026
- Firms we shortlist understand Article 4 Directions in boroughs like Islington and Hackney, where street-frontage UPVC is often restricted
- Foil-finish woodgrain UPVC is offered as standard for conservation-area properties that permit synthetic frames only at the rear
- Bespoke sizes for narrow Georgian openings in Wandsworth or the E14 wharves are quoted without a non-standard surcharge
- Every quote itemises Part L compliance (Uw ≤ 1.4 W/m²K) and Part F trickle vents separately
Areas we cover around London
We match homeowners across all 33 boroughs, from the E1 and EC1 stock of Whitechapel and Clerkenwell out to W2 Paddington, N1 Islington, SE1 Southwark, NW1 Camden and the outer belts of Croydon, Bromley, Enfield, Harrow and Richmond. Postcode-specific installer availability shifts weekly, so entering your full postcode gives a tighter shortlist than a borough name alone.
Frequently asked questions
Are UPVC windows allowed in London conservation areas? Often yes at the rear, sometimes yes at the front with a woodgrain foil, occasionally not at all if an Article 4 Direction is in force. Your borough planning portal states the rule for your street. Installers in our network will not quote a scheme that would breach it.
What Uw rating should a London installer quote for 2026? Building Regulations Part L requires a whole-window Uw of no more than 1.4 W/m²K on replacement work. Most London quotes we see come in at 1.2 W/m²K on A-rated units, which meets the standard comfortably.
How long does a typical UPVC install take on a London terrace? A five-window Victorian terrace in N7 or SE15 is usually fitted in one to two working days, subject to parking and any scaffold hire on street-facing bays.
Windows and doors in London - local context
Victorian and Edwardian terraces dominate inner boroughs, alongside interwar semis in outer London, 1960s-70s tower blocks, and modern glass-fronted apartments in redevelopment zones like Nine Elms and King's Cross.
Dominant era of housing stock: Victorian to Edwardian across inner London, interwar in outer boroughs.
Heritage note: London has over 1,000 conservation areas across 33 boroughs - always check with the local council planning portal before ordering.
- Islington
- Hackney
- Camden
- Wandsworth
- Greenwich
- Ealing
- Croydon
Postcodes we cover in London
- E1
- EC1
- N1
- NW1
- SE1
- SW1
- W1
- WC1
- W2
- N7
- SE15
- SW9
- E14
- E17
Not seeing your postcode? Request a quote anyway - we likely still cover it.