@Tony MarcelleOnline data can be sketchy.I recently had a problem where a town wasn't reporting interior square footage because their system had been down for months.

The court have said that expenses allocable to the common areas are not deductible (Anderson).2) You will have to find a reasonable way to depreciate based on # of room, or square footage of room that is rented. 3)Yes, utilities and those kind of other expenses can be allocated to rental activity based on the allocation percentage.

Usually they will allocate by sq footage or purchase price.

However some places will have it based on square footage.

This kind of square footage i believe may be easier to find and allow this particular kind of studio to use the space to open their facility.

Tenants are happy, because now the power is actual instead of split by square footage in CAM.

Find a good agent or appraiser who can estimate the value for you.Also, consider that building a bigger house tends to be less expensive (per square foot) than building a smaller house, simply because you have more empty square footage. 

I told her it has all the basic information, how many bed, bath, square footage, a few pictures, restrictions and a floor plan showing room dimensions and exact layout, and a QR code and link pointing to a website with many more full size pictures."

Make sure to compare apples to apples (ie. similar square footage / rooms / etc.)Zillow rental properties in your area and look at the history.

If your home office is 1/5 of the square footage of your home, you can deduct that percentage of the cost of that home - including security systems, electricity, rent/mortgage payment, insurance...it's substantial.