By city
London 23Manchester 16Stoke-on-Trent 13Southampton 12Sheffield 12Leicester 12Birmingham 12Colchester 11Swindon 11Huddersfield 10Hull 10Doncaster 10Leeds 9Derby 9Bristol 9Norwich 9Preston 9Nottingham 9Stockport 8Bradford 8Coventry 8Milton Keynes 8Cheltenham 8Belfast 8
| Name | Category | Address | City | Opening times |
|---|---|---|---|---|
| CNC Creations | Hardware shop | Ind Est, Sheaf Cl | Northampton | Mon–Fri 09:00–17:00 |
| Combat Doors Ltd | Door manufacturer | Unit 2 Catherine St W | Manchester | Fri 08:00–17:00 |
| Commercial Aluminium Shop Fronts Ltd | Aluminium frames supplier | 2b The Half Croft | Leicester | Fri 08:30–17:30 |
| Cotswold Conservatories | Conservatory contractor | Unit 4, Burley Fields Lake, Leckhampton Ln | Cheltenham | Mon–Tue 08:00–16:30 |
| Cotswold Home Improvement Supercentre | Window supplier | Unit 3, Beech Court, Bourton Industrial Estate | Cheltenham | Mon–Tue 07:30–17:00 |
| Covers Timber and Builders Merchants - Brighton | Timber merchant | Home Farm Business Centre | Brighton | Thu 07:00–17:00 |
| Creative UPVC | Aluminium supplier | 15 Kingsbarn Cl | Preston | Mon–Fri 09:00–17:00 |
| Crestshield Windows | Window installation service | 7 Croydon Rd | London | Mon–Fri 09:00–16:00 |
| Crown Point Glass Limited | Glass industry | Unit 3, Crown Point Glass Limited, King St | Manchester | Mon–Fri 08:30–17:30 |
| Crystal Clear Bristol | Window supplier | 24 Emery Rd. | Bristol | Thu 09:00–16:30 |
| Crystal Conservatories Ltd | Conservatory contractor | 2a Orgreave Dr | Sheffield | Fri 08:00–16:30 |
| Custom Choice Home Improvements | Window installation service | Unit 1, Prospect Place, Fengate | Peterborough | Thu–Fri 09:30–17:00 |
| D.G.Heath Timber Products | Timber merchant | Industrial Estate, Unit 3 Tyn Y Bonau Rd | Swansea | Mon 08:00–17:00 |
| Daves Doors | Door supplier | 27 Market St | Nottingham | Mon–Tue 09:00–17:00 |
| Derby shopfront shutter | Shopfitter | 32 Kedleston St | Derby | Daily Open 24 hours |
| Don Valley Window Systems | Window supplier | 207a City Rd | Sheffield | Mon–Fri 09:00–17:00 |
| Door Maintenance Sheffield | Door manufacturer | 10 Titterton Cl | Sheffield | Mon–Fri 08:00–16:30 |
| Door Repairs Preston | Garage door supplier | Blackpool Rd | Preston | Sat 09:00–23:30 |
| Door Services (Bristol) Ltd | Door supplier | Severnside Trading Estate, St Andrew's Rd | Bristol | Mon–Fri 08:00–17:00 |
| Doorfit Architectural Ironmongery & Fire Doors | Door supplier | Icknield House, 90 Heaton St | Birmingham | Mon 08:00–17:00 |
| Doorfit Garage Doors | Garage door supplier | Heaton House, Heaton St | Birmingham | Mon–Fri 08:30–17:00 |
| DoorMate | Door supplier | Rear of, 216 Newport Rd | Cardiff | Mon 09:00–17:30 |
| Doors Galore | Door supplier | 23 Washford Rd | Sheffield | Mon–Fri 08:30–17:00 |
| Doors2Floors Cutler Heights BD4 | Door supplier | 4B Cutler Heights Ln | Bradford | Mon–Thu 09:00–17:00 |
| Doors4U | Door shop | 787 Warwick Rd | Birmingham | Mon–Fri 09:00–16:45 |
| Doorways | Door supplier | 143 Northumberland St | Belfast | Mon–Thu 08:00–17:00 |
| Doorwins | Window supplier | Office 11, Dearden House, W Gate | London | Mon–Sat 07:00–22:00 |
| Doorwins Aluminium Windows and Doors | Aluminium window | office 3, 186 Greenford Ave | London | Mon–Sat 07:00–22:00 |
| DUK Automatic Door Specialists Ltd | Door manufacturer | Unit 13, Dewsbury Rd | Stoke-on-Trent | Sun Open 24 hours |
| Dunster House Windows and Doors | Window supplier | Factory, 2 Caxton Rd | Bedford | Mon–Fri 08:30–17:30 |