Turnkey interior design refers to a comprehensive service offered by interior design firms where they handle all aspects of the design process, from conceptualization to execution, delivering a fully finished and furnished space to the client. This includes everything from initial design concepts and space planning to the procurement of materials and furniture, construction, installation, and final decoration. Essentially, the client hands over the entire project to the interior design firm, which takes care of every detail, ensuring a hassle-free experience for the client.