It will really depend on what you put into your home (such as tile flooring vs. vinyl, if you would like granite counter tops vs. the traditional Formica, etc.....). Do you already have a lot? Typically you could plan for something between $98-125 per square foot. If you want to contact me directly I can put you in touch with a few builders and we can talk more about your budget, etc.... more
Also remember that although agents may appear to be on your side they only get paid if you buy or sell and although they are paid on percentage that is usually insignificant when compared to the percentage lost by the seller.