built-in (adj)

We have built-in cupboards in our kitchen.
The kitchen came with a set of built-in appliances, including a dishwasher and microwave, which were seamlessly integrated into the cabinetry.
The custom-made bookshelves had built-in lighting, creating a cozy reading nook in the corner of the living room.
The smart home system featured built-in security cameras that monitored the premises and could not be easily removed by intruders.