My ARV estimate is based on adding a master bedroom and bathroom by making it a 2-story home. 

My primary concern is the county not permitting a second "dwelling" and making me remove a kitchen or bathroom in unit b.

My properties are not easy to underwrite conventionally as they have boarded windows such as no longer utilized bathroom windows or basement windows (common for the area), siding and roofs not in best condition, and higher crime areas.  

There's old cat feces everywhere, noticeable urine stains, scratched up walls, black mold on the walls, rotten window sills, doors made out of wood and chicken wire that apparently were built to block off hallways, a tree partially through the roof in the living room, holes in the walls in some places, refrigerators that are beyond disgusting and vanities that are barely standing among other issues.The place has a lot of potential I think once it's cleaned up but I've never tackled this kind of situation before.

My question is, how do you determine if it’s worth adding another bathroom or bedroom.Any other Tips I should consider on the first flip will be appreciated.

So after spending some quality time to resolve a clogged drain (hair) and replacing some worn parts our tenant's bathroom sink was working perfectly.

The vanity looks good and so does toilet.

We got the spots treated for $750 (seller paid for it), so i thought everything was good.2 months into the rehab I found severe termite damage while tearing out drywall in the spot i had sent my realtor a picture of and it the downstairs bathroom on a load bearing wall which will probably end up costing me thousands.I should've done better due diligence, however, I am not an inspector and thought I was covering myself by getting it inspected/treated prior to buying.

Purchase price: $40,000 Cash invested: $141,000 Sale price: $230,000 Rehabbed the interior & exterior of a 4 bedroom and 3 bathroom single family including changing the property from a top and bottom duplex to a single family home.

One sticking point was the toilet in the upstairs bathroom, which was loose and leaking.