Flipped in an 8 week rehab including cosmetic, electric, plumbing, and landscaping improvements to the interior and exterior of the home, adding one bathroom and a back deck.

But if you're flipping here's some of the common general ledger accounts you will need.Revenue:Rental Income (in case your rent it before you flip)Sale Income (sales price when you sell it)Expenses:RET (Real Estate tax expense)Insurance ExpenseHOA Expense (if applicable)Interest Expense (if applicable)Depreciation expense (if carried over multiple years)Assets Fixed Asset - Building/home/condo (whatever you purchase), this should include all the costs associated with the purchaseFor your rehab, anything that essentially increase the value of the property should also be capitalized as a separate fixed asset (i.e. new stainless steel refrigerator, tile, new vanity etc) Inform your CPA as each will have different depreciable lives per MACRS, and this will be important if you carry for your flip over two different tax years.

For that reason, the range of pricing in the book assumes just supply lines.That said, if you're only adding drains to one or two areas (like a new bathroom, for example), the additional cost shouldn't be very great.If you're replacing all the plumbing in the house (supply lines and drain lines), then to be safe you may want to add $50-100 per fixture (or at very least, assume the high side of the range).  

I'm using the same octagonal bathroom tile in a house I'm doing now.

I'll be doing the following during the project to add value: second floor addition for 2 new bedrooms and full bathroom; slight change in kitchen/dining/living layout for open floor plan; new kitchen and new bathroom; finish basement, gas furnace, update laundry room; landscaping in the front and backyard.

My goal with this property would be to buy and hold.Question: How do I find out if the additional bedroom and bathroom were permitted?

We are buying a house that was built in the 90's and both bathrooms look like it in Bryan / College Station. 

The bathroom...let's just say I could lock 20 cats in there for a week and not notice the difference. 

Tile ends up being about $7/sq ft.I do tile in kitchens and bathrooms.

Most expensive areas are kitchens and bathrooms.