Pricing is different across the country. What I would do is start with all the items I want to have, then contact 3 professional General contractors and get them to give you estimates which they will usually do at no cost. Also check with architects and your local city permits office for cost and fees. General cost in this area have been $85,000 to $150,000 depending on what you want and the square feet that you are adding. I hope this was helpful Good luck!