You have teardown cost but that should be cheaper cost unless asbestos and county/city requires special demolition practices.

Conventionals at least go down as far as 5% normally, and in certain cases as low as 3% (I think those are special first time buyers / low income). 

Your first choice should be to find a CPA that specializes in real estate taxation and one that is local.

Or to someone looking for a "handyman special?" 

Added to that this was for every specialized trade (electrical, plumbing, and HVAC, Framing?).

Does anyone know if there are typically local Real Estate agents that specialize in helping to find these types of properties?

My architect and I sent them over assembly bill No 811 on ADUs and mentioned that the looks to be in violation of the bill quoting the following:"Accessory dwelling units shall not be considered by a local agency, special district, or water corporation to bea new residential use for purposes of calculating connection fees or capacity charges for utilities, including waterand sewer service, unless the accessory dwelling unit was constructed with a new single-family dwelling"They responded saying that this didn't apply to the ADU and quoted the following"(B) For an accessory dwelling unit that is not described in subparagraph (A) of paragraph (1) of subdivision (e), alocal agency, special district, or water corporation may require a new or separate utility connection directlybetween the accessory dwelling unit and the utility.

I am a top producing loan officer for a bank which specializes in FHA refinances.

@Danny Ohalloran - Flexibility and openmindedness is a key attribute to carry as a new employee but also as an investor.  

Here you need to find more specialized lenders/brokers.