I wouldn't get caught up too much on square footage.

You can put in the name of a street and get the square footage and recent deed transfer data. 

.$210,000 Purchase Price20% Down = $42,000Loan Amount $168,000Term 30 YrRate 4.25% (Non owner occupant rate)Monthly Payment $826.46Monthly Interest $359.79MONTHLY LOAN PAYDOWN $466.67Monthly Tax $334Monthly Insurance $75Monthly MTS. $100Monthly Cap.

My preferred avenue of investment is to find run down properties that need extensive renovation and then add even more value to the deal by adding square footage to the primary home or by adding an Additional Dwelling Unit on the property.

Usually I'll talk about the work that needs to be done, ideas to open up walls, close in porches to extend square footage, etc. 

Feedback has been fantastic but no offers yet.I'll post updates as I get themThe jury is still out on this project but I'm looking at a potential profit of $30k-$35k depending on selling price and closing costs.Some lessons learned:Time IS Money - I spent weekends and nights working on this place to save some cash, in the end I could have paid a bit (~$5k) more and had it ready to sell in weeks versus months.Keep track of everything - The amount of data I have from this flip is astounding: Square footage of rooms, kitchen layouts, electrical diagrams, paint schemes & material samples, inspection documents, eviction process, quantity of materials used and of course all of the costs.I'm much more confident in accurately estimating jobs and can spot questionable charges/material quantities - the best part is that the more flips you do the better your data gets!

Also how many beds, baths and square footage.

Within +/- 20% Sq Footage of subject property at MAX.

Also how do you get the accurate square footage of the house?

Absentee OwnerI obtained 1300 results in my market, using my square footage and price ranges.