I am asked often for advice on what should someone pay for a lot? What is the formula?
Here is the answer, you need to know the market, the finish home size and the sold price. What has been selling in the area? That is the ceiling, not the highest sale but the lowest sale of a new home in the area you choose. The lowest sale price of new construction within 6-12 months. Then you need to see what was in the homes that sold, how many bedrooms, bathrooms, what type of finishes, lot sizes, etc. Now you have built a ceiling, an X sft home with X bedrooms, X bathrooms and X finishes cost $X.
With the ceiling you can come up with a per ft cost to build then finalize what the purchase price ceiling has to be for the area. There is no other way to know a lot cost and just chucking numbers without doing homework is fruitless. Your realtor cannot set the lot ceiling price or tell you a great price, you can never compete with end users who may be bidding against you. They are buying to live, you are buying to develop and flip. You need to cover costs, plus time (time to develop, time to sell, time for market corrections if you get caught in a down cycle).