Building in the Bay Area in Calif. isn't like anywere else
Meeps if you need help let me know, I was a general contractor for 25 years, a carpenter & project manager on & off 10 years before that, my Pops also was a general contractor when I was young, I built mostly in your area of Concord, Walnut Creek, Dublin, San Ramon, Oakland, Lafayette, Berkley, Martinez, Antioch, Pittsburgh, Fairfield, Sacramento, 125 dealerships in total through out the western U.S., but none in Danville or Alamo area, before becoming a Golf Pro, I specialized in Automotive Dealerships Construction, Consultation & Maintenance... I would 1st check with the building department that the structure would be erected or built in, find out what type of materials they will allow, you will probably have fire suppression issues & probably need to install a fire sprinklers system & fees, if its anything more than just a carport or basic garage {prepare to get bent over & reamed for that issue} depends on how close a fire dept. &/or hydrant is from your location & were the building is located near or by any type of structures house or commercial property, what type of structures surrounding your planned project., is there any type of power lines or gas lines to deal with overhead & underground, remember your in Calif. & the Bay area it is by far one of the most liberal **** retentive areas in the nation, when it comes to specification, regulations & building Dept's, property set backs & permit fees, Title 24 & handicap accessibility {especially if you add a restroom &/or cooking areas}, Melo-Rouse or water &/or school fees, structure per/ft fees usually around $2+ per./sg.ft. of roof line if single story, then there are egress fees, sewer fees, electrical supply access/fees {PG&E}, possibly trenching fees, cable & telephone hook up & access fees & possibly trenching fees, occupancy permits {if it has a rest room or living area of any kind, earthquake regulations, height & type of structure, possibly environmental impact studies &/or traffic studies, if you don't already have electricity to the property you will need a temporary power pole & supply, plus probably even the color of the structure even, unless it's in a rural area, away from development, these all could be issues for sure... You know how to get a hold of me... Good luck buddy, lots of variables, it's an undertaking for sure, even if you just hire/contract it out, be prepared to spend lot's of time on it or pay dearly for someone to manage the project for you...