KEY LOT:
A piece of property which is pivotal to the success of a proposed development.

KEY TENANT:
For a commercial or office development, the resident who attracts other residents or customers, such as a major chain store in a mall or a law firm in an office building. May gain favorable lease provisions as an incentive to lease space.

KICKBACK:
Gratuitous payment made to a person for a referral of business.

KICKER:
Additional compensation for a lender or investor, the right to share in the income from the property in addition to payments of principal and interest. Also known as "equity kicker" or "lender participation".

KIOSK:
Any small structure that stands alone, usually for the purpose of supplying a product or service (i.e. the attendant's booth in a parking lot, a lottery booth in the center of the promenade of a mall).