Rental Property Investor · Edmonds, WA · Member since 2017 · 10 posts · 5 votes
Going to build an ADU (800 total square feet) next to a house that has a basement and a second floor.
Question is, which costs more:
1) Building a second floor (roughly 400 sqft foundation and 400 sqft second floor).
Or
2) Build a basement (roughly 400 and 400 again).
I realize there are many factors (sewer slope in basement, soil removal, etc.), I was just curious about general cost (2nd floor wood vs basement concrete).
Any thoughts on the matter are greatly appreciated!
@Doug Kienzle - you have an expert right in Portland, OR. Check out http://www.buildinganadu.com/c... if you haven’t done so yet. It might help you estimate costs. If you are looking for more info than that, there are some other sources like https://www.hausable.com/ (California specific) that offer ADU consulting services to answer these types of questions. Good luck with your search and your future project.
@Doug Kienzle - you have an expert right in Portland, OR. Check out http://www.buildinganadu.com/c... if you haven’t done so yet. It might help you estimate costs. If you are looking for more info than that, there are some other sources like https://www.hausable.com/ (California specific) that offer ADU consulting services to answer these types of questions. Good luck with your search and your future project.