"Triple Net" is a term frequently used when talking about rents on business spaces. A triple-net rent involves the tenant paying the owner of a space a certain, defined rent, with that figure being "net" for the owner, and expenses - utilities, taxes, and maintenance - being the responsibility of the tenant. Triple-net rent is therefore more expensive for the tenant for the same dollar value than gross rent.

Rents for commercial space are traditionally presented in per-square-foot notation, and given in annual terms - $36NNN / sqft means the tenant pays $36/year, or $3/month, for every square foot of leased space, plus all expenses associated with that space.