The 10 window and door fitters from Google's results for Harrow, ranked on Google rating, online presence and other factors. Updated 10 September 2026.
on GoogleHarrow
Albro Windows supplies and installs uPVC double glazing, composite doors, aluminium options and bi-fold doors for residential properties. Based in Harrow, the business also fits conservatories across the local region.
020 8863 7068 2-6 Victor Rd, Harrow HA2 6PU
on GoogleRuislip
Home Works Windows supplies and fits energy-efficient double glazing for domestic properties in Harrow and the surrounding HA0 and HA1 postcodes. Its fitters install a range of double-glazed replacement windows.
01895 653002 12-14 High St, Ruislip HA4 7AN
on GoogleWatford
Harp Windows manufactures and fits replacement windows, doors, patio doors and conservatories. Operating from a showroom in Watford, the business carries out double glazing installations across Harrow, Stanmore and neighbouring areas.
01923 231111 91-93 St Albans Rd, Watford WD17 1UL
on GoogleHarrow
Harrow Windows specialises in the design and installation of conservatories, replacement doors and windows in timber, aluminium and uPVC. Operating in Harrow, the firm handles residential projects including properties in conservation areas.
on GoogleRayners Lane, Harrow
Doors, Windows, French Doors, Bifold, Sliding Doors is a window and door fitting firm based in Rayners Lane, Harrow.
020 8429 0383 393-395 Alexandra Ave, Rayners Lane, Harrow HA2 9EF
on GoogleHarrow
Sunray Glass delivers double glazing repairs, window maintenance and glass cutting from its base in Harrow. The firm creates custom mirrors, kitchen splashbacks and balustrade panels, alongside emergency boarding services across London.
020 8954 0699 609 Kenton Ln, Harrow HA3 7HJ
on GoogleWatford
Bridge Water Glass provides window and door fitting services in Watford.
0800 859 5935 44-52 Vicarage Rd, Watford WD18 0EN
on GoogleLondon
The Window Centre (Harrow) Limited supplies and installs replacement windows and doors for residential properties in the Greater London region.
020 7939 9101 Newspaper House, 40 Rushworth St, London SE1 0RB
Easting Close, Worthing
Vevo Windows supplies and fits uPVC windows, composite doors, bi-fold doors and conservatories. The business serves domestic clients across the Harrow and Wembley areas.
01903 282200 Unit E, Easting Close, Worthing BN14 8HQ
Watford
Multitrades Windows manufactures, supplies, and installs uPVC and aluminium windows, doors, and glazed roofs in Watford and St Albans. Its services cater to both residential homeowners and commercial premises across the region.
1 Wiggenhall Industrial Estate, Watford WD18 0FL
In Harrow, upvc window typically costs £460 – £920. Labour in Greater London runs 15% above the UK median, which accounts for most of the difference from the same job elsewhere.
These are the firms from Google's results for "window fitters harrow". They are ranked on Google rating, online presence and other factors.
The figures above are Harrow ranges. These explain what drives them, so you can read a quote properly.
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.
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.
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.
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.