Double glazing in London
uPVC windows in London typically cost £6,200 (3-bed semi, nine casement windows), with most between £4,400 and £10,000 including VAT. That is 25% above the UK average, because local installers charge around £240–£340 a day.
Covers London, Croydon, Bromley, Ealing, Enfield, Kingston upon Thames and the surrounding areas.
Windows prices in London
| Product | Typical here | UK typical |
|---|---|---|
| uPVC windows 3-bed semi, nine casement windows | £6,200 | £5,000 |
| Aluminium windows 3-bed semi, nine casement windows | £10,500 | £8,500 |
| Timber windows 3-bed semi, nine casement windows | £15,500 | £12,500 |
| Sash windows one uPVC sliding sash window | £1,100 | £900 |
| Bay windows one three-panel uPVC bay window | £2,500 | £2,000 |
| Tilt and turn windows one uPVC tilt and turn window | £810 | £650 |
| Triple glazing one triple glazed uPVC casement window | £870 | £700 |
| Secondary glazing one secondary glazed panel inside an existing window | £350 | £280 |
| Replacement glass units one misted sealed unit in a mid-sized window | £110 | £90 |
Guide prices including VAT, +25% against the UK average. Indicative, not quotations.
Doors prices in London
| Product | Typical here | UK typical |
|---|---|---|
| Composite front door one composite front door and frame | £1,700 | £1,400 |
| uPVC door one uPVC front or back door and frame | £1,100 | £840 |
| Bifold doors a three-panel aluminium set, about 3 m wide | £4,900 | £3,900 |
| French doors a pair of uPVC French doors and frame | £1,500 | £1,200 |
| Sliding patio doors a two-panel uPVC sliding patio door | £1,900 | £1,500 |
Guide prices including VAT, +25% against the UK average. Indicative, not quotations.
Windows and doors in London
Inner London is sash-window country. Victorian and Edwardian terraces were built with timber sliding sashes, and in conservation areas and under Article 4 directions the council will often expect replacements on the street side to keep that look, sometimes in timber. Check before you order uPVC. Flats add another question: in a converted house the windows may belong to the freeholder, so read the lease first.
A front door on a London terrace faces the street, so in a conservation area its style, panels and colour may be controlled as tightly as the windows. Composite doors made to look like a traditional four-panel door are a common answer. Garden doors at the back are rarely visible from the street and are usually far simpler to change.
Inner London is dominated by Victorian and Edwardian terraces and by conversions of them into flats, so most jobs involve a party wall and a neighbour. Outer London is largely interwar semi-detached, with substantial post-war blocks and a steady supply of recent high-density flats. Solid-wall construction is common inside the North and South Circular.
Planning and building rules in London
London has more conservation areas than any other region, and in much of the inner boroughs permitted development rights have been removed by Article 4 directions. Assume you need to check before changing anything visible from the street. The Party Wall etc. Act 1996 applies to most terraced and semi-detached work, and serving notice properly takes two months, so it belongs at the start of the programme rather than the end.
The weather
London is the driest part of the UK at roughly 600mm of rain a year, a little over half the UK average, so damp is less pressing here than almost anywhere else. Heat is the live problem instead: the urban heat island keeps the city several degrees warmer than the surrounding countryside on summer nights.
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