| Anglian Home Improvements | 020 8863 7131 | | 56 Station Road, North Harrow, Harrow, HA2 7SE |  Map & Directions |
| Alec Wadlow & Co | 020 8866 3366 | | 19 Village Way East, Harrow, HA2 7LX | | Map & Directions |
| The Window Centre | 020 8868 8081 | | 393-395 Alexandra Avenue, Harrow, HA2 9EF | | Map & Directions |
| The Window Centre | 020 8868 8081 | | 393-395 Alexandra Avenue, Harrow, HA2 9EF | | Map & Directions |
| Metali Window Service Co | 020 8422 6444 | | 1 Northolt Road, The Broadway, Harrow, HA2 0DL | | Map & Directions |
| Specialised Windows | 020 8422 3033 | | 1 Thurlow Gardens, Wembley, HA0 2AH | | Map & Directions |
| Brampton Glass Services | 020 8907 1674 | | 28 Glebe Avenue , Harrow, HA3 9LG | | Map & Directions |
| County Architectural Aluminium | 020 8429 2574 | | County House , 7 Kildare Close , Ruislip, HA4 9LG | | Map & Directions |
| Galaxy Windows | 020 8427 3888 | | Unit B5, Phoenix Industrial Estate, Rosslyn Crescent, Harrow, HA1 2SP | | Map & Directions |
| Roe Green Builders Ltd | 020 8903 3550 | | 5 North End Road, Wembley Park Business Centre, Wembley, HA9 0AS | | Map & Directions |
| Imperial Windows Ltd | 020 8905 0172 | | 41 Aldridge Avenue , Stanmore, HA7 1DB | | Map & Directions |
| Albro | 020 8863 8686 | | Albro House, 59 Palmerston Road, Harrow, HA3 7RR | | Map & Directions |
| Weatherseal Holdings Ltd | 020 8868 5877 | | 10 Village Way, Pinner, HA5 5AF | | Map & Directions |
| Academy Units | 020 8863 7555 | | Albro House, 59 Palmerston Road, Harrow, HA3 7RR | | Map & Directions |
| Zenith Windows Ltd | 020 8861 1188 | | 7-9 Manor Parade , Sheepcote Road , Harrow, HA1 2JN | | Map & Directions |
| Silver Glass Co Ltd | 01923 824769 | | 77 Joel Street, Northwood, HA6 1LL | | Map & Directions |
| Vogue Windows | 020 8868 4444 | | 89 Field End Road, Eastcote, Pinner, HA5 1QG | | Map & Directions |
| Capital Window Manufacturing Ltd | 020 8427 8818 | | 237 Kenton Lane, Harrow, HA3 8RP | | Map & Directions |
| Ruislip Windows | 020 8868 1133 | | 218 Field End Road, Pinner, HA5 1RD | | Map & Directions |
| Fourstar Windows Ltd | 020 8900 9333 | | Unit 10, Metro Trading Centre, Second Way, Wembley, HA9 0YU | | Map & Directions |
| D E S Glazing Ltd | 01895 621847 | | 31 Glenalla Road, Ruislip, HA4 8DW | | Map & Directions |
| J S P Aluminium | 020 8900 9775 | | Unit 29 South Way, Pop In Commercial Centre, Wembley, HA9 0HF | | Map & Directions |
| Value Windows Ltd | 020 8423 0654 | | 2 Stonefield Way, Ruislip, HA4 0JS | | Map & Directions |
| J S P Aluminium Ltd | 020 8902 2355 | | Unit 29, Pop In Buildings, South Way, Wembley, HA9 0HB | | Map & Directions |
| Balmoral Windows & Conservatories Ltd | 01923 841800 | | 68 Batchworth Lane , Northwood, HA6 3HF | | Map & Directions |
| Mr Mole Double Glazing Repairs | 020 8427 8099 | | 116 Park Crescent, Harrow Weald, Harrow, HA3 6ET | | Map & Directions |
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