Window and door fitters in the UK
Replacement windows, doors and conservatory glazing. FENSA registration saves you a building control application.
- Towns and cities
- 51
- uPVC window from
- £400
- Accreditations explained
- 3
- uPVC window
- £400 – £800per window, supplied and fitted
- Full house, uPVC
- £4,000 – £8,000typical 3 bed
- Composite front door
- £900 – £2,000supplied and fitted
- Sash window restoration
- £500 – £1,200per window
Typical UK ranges for 2026, excluding VAT. Local figures on each city page are adjusted for regional labour rates.
Window and door fitters by town and city
51 towns and cities, each listing up to 10 firms from Google's results for that town, ranked on Google rating, online presence and other factors.
Launch cities
- Window and door fitters in LondonGreater London
- Window and door fitters in BirminghamWest Midlands
- Window and door fitters in ManchesterGreater Manchester
- Window and door fitters in LeedsWest Yorkshire
- Window and door fitters in BristolBristol
- Window and door fitters in LiverpoolMerseyside
- Window and door fitters in SheffieldSouth Yorkshire
- Window and door fitters in NottinghamNottinghamshire
- Window and door fitters in CoventryWest Midlands
- Window and door fitters in LeicesterLeicestershire
- Window and door fitters in DerbyDerbyshire
- Window and door fitters in SouthamptonHampshire
- Window and door fitters in CroydonGreater London
Everywhere else
- EdinburghCity of Edinburgh
- GlasgowGlasgow City
- CardiffCardiff
- AberdeenAberdeen City
- YorkNorth Yorkshire
- NorthamptonNorthamptonshire
- NorwichNorfolk
- OxfordOxfordshire
- PlymouthDevon
- BrightonEast Sussex
- BelfastCounty Antrim
- NewcastleTyne and Wear
- WolverhamptonWest Midlands
- CambridgeCambridgeshire
- Stoke-on-TrentStaffordshire
- Milton KeynesBuckinghamshire
- BlackpoolLancashire
- BathSomerset
- SwindonWiltshire
- ColchesterEssex
- DoncasterSouth Yorkshire
- CheltenhamGloucestershire
- ExeterDevon
- GloucesterGloucestershire
- SwanseaSwansea
- St AlbansHertfordshire
- PortsmouthHampshire
- BromleyGreater London
- EnfieldGreater London
- HarrowGreater London
- RomfordGreater London
- EalingGreater London
- BarnetGreater London
- RichmondGreater London
- North LondonGreater London
- East LondonGreater London
- South LondonGreater London
- West LondonGreater London
What the badges actually mean
The accreditations that matter for window and door fitters, in plain English.
FENSA registered
Self-certification for replacement windows and doors against building regulations. Without it you need a building control application for every window.
TrustMark registered
The only government-endorsed quality scheme for work in and around the home. Covers trading standards as well as technical competence.
Which? Trusted Traders
Assessed by Which? on customer service and business practice, including a credit check and reference calls.
Before you get quotes
Work out the budget and the paperwork first. It changes the conversation you have with the firm.
Window replacement cost: uPVC, timber and aluminium compared
2026 prices per window and for a whole house in uPVC, aluminium and timber, the extras a quote can leave out, and the certificate and planning rules in each UK nation.
Do you need planning permission for a conservatory?
The size limits that let a conservatory go up without planning permission in England, when the building regulations exemption applies and how it is lost, and the rules in Wales, Scotland and NI.
Condensation inside double glazing: why it happens and how to fix it
What mist between the panes means, why it will not go away, what a new sealed unit costs in 2026, when the whole window is worth replacing, and the rules for replacing only the glass.
Window and door fitters: common questions
Why does FENSA registration matter?
Replacement windows must meet building regulations for thermal performance. A FENSA registered installer self-certifies and sends you a certificate. An unregistered one means you need a building control application, and no certificate is a problem when you sell.