Building a garage, cost $$$$

I just called my local 84 Lumber yard and they said it was $5400 for a 24x24 garage kit and a whole $200 more would get me a 24x28 garage kit. Seems like a good deal compared to what I have been getting quoted but like you said, I would have to build it all myself. Concrete pad would probably be another $2500 I would estimate. Thanks for the tip, Ill keep that one in my back pocket as well.

Check your local building codes. They may not let you build it on a slab. Even though the plans for my garage were signed off by a Mass licensed PE and called for a 2' footing the local building inspector insisted on a footing that went below the frost line. That required hiring a backhoe for excavating, some one to put up concrete forms and a bunch more concrete. That cost me an addtional $3500 above the 6" concrete floor I poured.