House extensions for every budget between 20 000 and 30 000 can include building an extension over a garage that s already there.
Garage side roof extension.
Then complete the roof frame by adding the 2 6 subfascia and building the side and end overhangs.
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.
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.
Match the overhangs to the overhangs on the garage.
If built well they can last generations with only minor maintenance needed.
Sheathing to fit and nail it to the rafters.
This is by far the most common form of garage extension chosen.
Reinforce the connection between the rafters and the tie plate with metal hurricane ties.
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.
The typical starting costs of a uk sized garage extension built from brick with a flat roof will start at around 4 500.
A brick garage is a longer lasting higher quality garage.
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.