The typical starting costs of a uk sized garage extension built from brick with a flat roof will start at around 4 500.
Garage side roof extension.
But if the building is detached and you are converting a standalone garage the cost could increase to as much as 15 000 which is still likely to be cheaper than a single storey extension.
If built well they can last generations with only minor maintenance needed.
House extensions for every budget between 20 000 and 30 000 can include building an extension over a garage that s already there.
If it s in good condition then a garage renovation can be carried out for as little as 6000.
It is more cost effective than building a new ground floor extension providing the existing foundations can take the load an engineer or surveyor can advise.
Sep 21 2017 how to build a lean to roof do you want an extension on the side of your home.
Then complete the roof frame by adding the 2 6 subfascia and building the side and end overhangs.
Reinforce the connection between the rafters and the tie plate with metal hurricane ties.
When you re done with the roof frame cut 1 2 in.
Sheathing to fit and nail it to the rafters.
Rooflights link a side return extension to the outside especially when tall trees are visible in the surroundings and a view of open sky can also help the interior feel bigger.
A window with minimal framing and no glazing bars across it will maximise sightlines particularly if it s floor to ceiling as will sliding doors or large leaf bi folds with the same barely there style of frame.