Tax write off question

[Nate Pucel]

So I bought an investment house (not my primary residence), and have been renovating it for over a year. My plan is to sell it this year, but I'm wondering how I calculate the amount of taxes owed upon sale, as it will technically be classified as long term capital gains, which seems pretty straight forward, but then I'm not sure how to determine what amount I pay taxes on, as I bought it for around 45k, and will probably have invested around 50k additional into it by the time it's complete. Also, am I able to subtract property taxes, utilities, outside labor,etc, from the amount I'd be taxed on?

Thanks in advance.