Originally Posted by
david blakelock
Victor, I just completed a detached shop. It is 25x40 so a 1000 sq. ft. I had it roughed plumbed as well as electric runned from the main and had them put outlets through out the shop. It has a small bathroom with a shower, toilet and sink. It also has an oversized garage door even though it won't be used as a garage, but I did that for resell. I also ran a concrete driveway from my existing driveway back to the shop. It is insulated and has plywood for the interior walls and drywall on the ceilings. I did none of the work myself. The total cost for everything was right at $45K. I could have done it cheaper but we wanted the style of the garage to match the main house, thus we have nice siding on the garage as well as certain architectural features which drove up the costs. So to answer your question for a 1000 sq. ft. detached workshop the cost is right at $4.50/sq. ft. As has already been pointed out the main cost was the slab. Down here in Texas we have a problem with the ground swelling so I had to do a post tension slab rather than just a regular slab. That was not cheap. Good luck!
David