The cost to add a master bedroom and bathroom to your home can vary depending on the contractor you hire and the location you're in.
Also the things you want in the bathroom and bedroom can add to the cost of the addition of the master bedroom and bathroom.
But you can expect to pay between $21,000.00 to $60,000.00 for a master bedroom and bathroom addition to your home if done by a builder or contractor.
Of course if you know what you're doing then you can add the master bedroom and bathroom onto the home yourself with the proper permits for much less but if not you'll need a contractor and builder to build to code.