Double glazing installers in Harrow
31 companies have a registered office in Harrow under the glazing trade (SIC code 43342).
Extract from the public Companies House register (glazing trade, SIC 43342) - not a recommendation or a vetted panel. Select a company for its full register entry and local context.
| Company | Area | Registered | Accounts filed | Details |
|---|---|---|---|---|
| The Window Centre (Harrow) LtdLtd · no. 02902700 | HA2 | 1994 | 2026 | View details → |
| Perfect Glaze LimitedLtd · Small · no. 03496204 | HA3 | 1998 | 2025 | View details → |
| Ds Windows LtdLtd · Small · no. 08076721 | HA3 | 2012 | 2025 | View details → |
| Dwg Windows & Doors LtdLtd · Micro · no. 08679169 | HA1 | 2013 | 2025 | View details → |
| First Glass Solutions LtdLtd · Micro · no. 11381423 | HA3 | 2018 | 2025 | View details → |
Source: Companies House free company data - SIC 43342, active companies, with dormant and long-overdue filers removed. Company status and details can change; check the register for the current position.
How to choose between them
A whole-home job in Harrow typically runs £3,400 to £10,400 (local cost factor 1.15×), so the spread between three quotes on the same brief is worth chasing. Interwar semis dominate the borough, with Victorian streets around Harrow-on-the-Hill, Edwardian villas in Pinner and Wealdstone, plus 1930s Metroland estates in Kenton and Belmont.
Heritage note: Around 25 conservation areas including Harrow-on-the-Hill and Pinner village.
Whichever company you approach: get three written, itemised quotes, confirm FENSA or CERTASS registration on the scheme's own register, check the guarantee is insurance-backed, and ask for two recent local installs you can look at. Our guide to comparing double glazing quotes walks through it.