DWP denied the conversion due to a dwelling (ADU) being directly beneath the power line.

secondly, in terms of finding the source of the leaks, for the first room (pics with the two holes cut out of the wall), the leak was in the sink plumbing that has been replaced, so that is good. in the other room, i don't know what it is for sure. theres no signs of a leak from the roof, and theres nothing running under the floor. my guess is that there were just years and years of spills, or pets, in that room (a 1970s house) and it was never handled properly. in terms of subfloor damage, there is definitely damage in the bathroom beneath the tub, which will be replaced. i've never done it before, and i'm a bit intimidated by the task, but i think it is something i can handle, after watching others do it. just so were all on the same page, these pictures are just of the wood floors, and not of the subfloors. so theres no way you can see the subfloors from these pictures. there may be potential for wood root on the gray pieces, but the wood isnt soft, and it doesn't sound/feel hollow. 

If you have pipes run in insulated cavities or runs that are mostly beneath ground level, I wouldn't be too worried as the ambient temperature wont drop as drastically as the exterior. 

As cliche as the advice sounds, it’s imperative that you live beneath your means by maxing out your savings.

Pin that to the rim joist, then install your trimmers beneath.

I would argue that it would apply if they have a team of agents beneath them admins etc; however, a single agent more than likely should be looking at the majority as compensation.

I'll raise you the handyman Pex, 2x4 shims & caulk leak fix I found....

There is a chance you can support it from underneath with shims to place pressure from the bottom.

@Susan Grinde when I renovated my 1921 home here in Seattle I found mercury dimes that were being used as shims for the door and window casing

I’m not saying you’re egotistical, but always keep it in check and live beneath your means.