Our roofers are often called to build a carport roof in London. A carport is not a proper garage, but a parking space with a roof on.
Parking space in London are very restricted,more often than not, parking a car under a tree will result in having to clean your windshield very often, due to bird droppings, organic rubbish, etc – which can also be corrosive for the paintwork.
If you live in a Conservation Area, a Planning Permission is needed in most cases. Repairing and replacing one, will require to keep the same design, size and use the same materials as the old garage/carport.