House extension plan

I am looking to extend the existing living space of my home through a traditional house extension project that will add a fully accessible ground-floor bedroom and bathroom. I understand this will require considerable investment and have a budget of more than $20,000 available for the task. The construction should adhere to the existing house style as requested and leave me with an optimally expanded living space. I am looking for an experienced architect to bring this project to life and provide high quality work in a timely manner.