Tony, I used EAGLELIFT on my last house. Find them on the internet. They are pro's. If you do not own the home yet, they will charge $350.00 for an estimate, free if you already own. If they are to do any work, the $350 is absorbed in the contract. Licensed engineers and will give you a certificate when done. If you are selling and there is any doubt the estimate and/or certificate will be invaluable.