Some kitchen cabinet dealers and designers will be a better place to start as you can get good cost estimates for the project before you pay an architect to work on a kitchen design that would be better designed by a kitchen designer.
Once you determine if the project is in your budget and have estimated pricing you can get general contractors to bid the job and an architect that possibly works with the general contractor you choose to do the plans needed for permits.
Doing it this way saves time and money and generally gets you a better kitchen. IF the cabinet dealer/kitchen designer works this way - as we do. Read this blog:
https://www.mainlinekitchendesign.com/general/im-doing-a-kitchen-addition-whats-my-first-step/