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Double garage

I would like to get a cost of a double garage to be put up in our new property. I am just getting some quotes to get the concrete laid once we move up on the 1st Feb, then would like to get a double garage put on soon after. So am hoping to get some quotes for this please. I am after a double garage, with one side to have a garage door which will be used for a car, and the other side to be used as big office and storage space, with a ranch slider, with an internal wall dividing it. I have attached a copy of the property with measurements etc, and in yellow is where the garage will go. If you can help, would love to hear from you.