I do Demo, Framing, Electrical, Plumbing, Roof Repair, and many other things it takes to get a house ready to sell or rent. 

Full clean out of debris:  Dumpster (20 yard): $300  Labor (4 guys x 6 hours x $10): $240Smoke mitigation / cleanup: $1,000Drywall / ceiling demo:  Labor (4 guys x 6 hours x $10): $250Electrical:  Re-wire: $1,200Plumbing:  Repair/replace damage: $800

One of my biggest worries as a contractor is gettig involved with a previous house with radiant flooring because during removal of the flooring the demo guys can hit a line and cause water damage. 

I pay about $300 to live in the top part of my duplex which is a 3br 2 bath and im converting the third floor to a master floor and in the process of demoing the bathroom. $300 to live in Lakewood is a win in my book and if you structure your deal right you can be there too and it seems like a no brainer cause its about $700 to live in one of those studio apartments in Lakewood.

He said he can do everything (demo, patch, paint, porch, floors, bathroom tile and finishing basement) in 5 week time frame.

The value would be dependent on lot size, cost to demo and clearing, zoning and availability of utilities.

Hello @Johan Yang - I recommend you contact @Katherine Blazer for Tampa and surrounding areas.

They will almost all do free demos for you and you can weigh the utility for yourself. 

For really high end finishes and upgrades, count on $300 per sq. ft.So, if you are talking mid level higher end homes in CA and just the interior (no windows, stucco, roof, foundation,  landscaping, etc) then the price is under those figures.In my Beverly Hills flip, it is just over 3000 sq. ft. and the interior portion of the rehab (demo, architectural design, engineering, rough framing - added load bearing beams, moved load bearing walls, low voltage wiring, rough electrical and plumbing (some existing is used) or repositioned), finish electrical and plumbing, flooring (wood) plus tile in bathrooms and kitchen, new interior solid core doors and hardware, drywall (about 40%- 50% of existing was used), paint, custom cabinetry with custom stain, cabinet hardware, kitchen appliances - Viking) all of this will run me about $250k or just over $80 per sq. ft. not including any permit fees or project manager fees.Now, I am also doing new windows and exterior doors and sliders, roof, landscaping, decking, BBQ buildout, etc. and my total budget is $350k ($113 per sq. ft.) 

FWIW, I've demoed several that were over 50 years old.