Sounds like you’ll need a structural engineer as well.We kept the 6x6 in our basement, added steel C channel to it to make sure it could carry the load.

We went through the process of rezoning, getting approval from the city, getting the architect, builder and engineers on board, and getting the lawyers to get the correct paperwork. 

Replaced 24 old, rotted wood windows with new low E vinyl windows, replaced 9 old broken wood exterior doors with new steel security doors w/ master key deadbolt system, added one bedroom w/ lighted closet, and lighted closet to existing bedroom, 2300 SF of new carpet installed, 700 SF of engineered hardwood installed, 3 new water heaters, 2 new exterior electric services, 2 new interior breaker panels, new paint on all walls and trim, 4 new shower surrounds, 4 new countertops, 4 kitchen sinks.

Replaced 24 old, rotted wood windows with new low E vinyl windows, replaced 9 old broken wood exterior doors with new steel security doors w/ master key deadbolt system, added one bedroom w/ lighted closet, and lighted closet to existing bedroom, 2300 SF of new carpet installed, 700 SF of engineered hardwood installed, 3 new water heaters, 2 new exterior electric services, 2 new interior breaker panels, new paint on all walls and trim, 4 new shower surrounds, 4 new countertops, 4 kitchen sinks.

As California moves to outlaw new internal combustion engine vehicles from being sold in the state by 2035.

So a lot of it isn’t human decisions, it’s just an algorithm making the decision.

Sistering is so easy, my two teens did a kitchen, laundry and dining room of one of our rental houses that previously had termites.And with termites, you never know what could be in the walls, any house you buy has the potential for unseen termite damage.Ask a structural engineering company to look at it to see what they would recommends. 

Currently on organic reach but very present on search engines.

Another project had a stop work order from the city due to an improper installation of a engineered laminated header through the main floor.

Do you normally hire a home designer/structural engineer when coming up with plans on how to convert a SFH to a duplex?