What would we include the value of improvements made by a doctor in a rented office under?

The value of improvements made by a doctor in a rented office would be included under equipment. This is because improvements generally refer to modifications or enhancements that enhance the functionality or value of the space for conducting business. These improvements are often considered equipment as they are necessary for fulfilling the operational needs of the practice.

In a rented office scenario, items such as specialized fixtures, cabinetry, and medical equipment installed to support the practice would classify these improvements as integral to the business operation rather than being classified as stock (which typically refers to items held for sale), building (which would pertain to the physical structure itself, owned rather than rented), or personal property (which generally refers to movable items owned by the individual). Hence, categorizing improvements under equipment aligns with the purpose and use of these enhancements specific to the professional activity conducted in the rented space.