My house currently has a standard sized single detatched garage with a flat roof. I need to move my Mk1 Escort in which is still at my parents house so I am looking to extend the garage.

My plan is:

Bin the flat roof and pull down one side wall and the back wall of the garage, dress the bricks that were already there (can do all that bit myself). Then I want to get the side wall rebuilt about 2ft further out from its current position (i.e. make the garage 2ft wider) and also extend the length of the garage by about 5ft. I also want to put a pitched roof on.

Does anyone have a clue what this will cost to get done? being my first house I don't really have much of an idea about these things!!