Currently my "shop" is half of our double garage, which means our daily drivers sit outside and my wife's convertible, which sits in the other garage stall, gets covered in sawdust constantly. I have had plans drawn up to build a shop, which is attached to the current house/garage and is about 220 sq ft. The house is built into a steep hillside and the shop would mostly be underground requiring a fair amount of excavation and poured concrete retaining walls. The design also incorporates an 8x10 garden shed above the shop (it's at grade level in the back yard), and we are extending the garage 4 feet to make it more functional (currently can't open the tailgate when the car is parked in there). Total additional square footage of the shop, garage and shed comes to just over 400 square feet. The price quoted for this is just shy of $120,000, but we would also re-do the current retaining wall around the driveway, which would be another $30,000. We have had multiple quotes - some a little cheaper and some more.
So it comes to $300 per square foot, which seems a lot for unfinished space, but I guess all of the excavation adds to the cost, as well as integrating it into the current building (vs. building a standalone structure).
I plan on living here for many years so would hope to get a lot of benefit out of it, but unexpected things can happen and if we had to move, I feel we wouldn't get much back on all of that expenditure.
Anyway, trying to get a sanity check if that seems crazy expensive? I do live in a more expensive part of Michigan, but it's Michigan, not a coastal city.
So it comes to $300 per square foot, which seems a lot for unfinished space, but I guess all of the excavation adds to the cost, as well as integrating it into the current building (vs. building a standalone structure).
I plan on living here for many years so would hope to get a lot of benefit out of it, but unexpected things can happen and if we had to move, I feel we wouldn't get much back on all of that expenditure.
Anyway, trying to get a sanity check if that seems crazy expensive? I do live in a more expensive part of Michigan, but it's Michigan, not a coastal city.



