Looking for advice on a property I am thinking about purchase

[Felix Texidor]

Hello,

I am brand new to REI and needed some advice. I am looking to purchase a 3/1 with 1190 sqft property in a really good area in Tampa Bay FL, however I am paying almost retail price for it. Would it be a good idea to add more sqft and an additional bathroom to make the value of the home appraise for more? I had my realtor run the comps based on similar homes that sold with the added sqft and bathroom and noticed that they were sold for significantly more which is why I am intrigued to purchase this home. Is this a good idea?