- Absolute NNN lease
- A triple net lease in which the tenant is responsible for every cost of the property, including roof and structure, and typically cannot terminate for casualty or condemnation. Also called a bondable lease.
- Base rent
- The fixed rent stated in a lease before expense reimbursements, percentage rent, or other charges. In commercial leases it is usually quoted per square foot per year.
- CAM (common area maintenance)
- The costs of maintaining shared areas of a multi-tenant property, such as parking lots, landscaping, lighting, and sidewalks, which are passed through to tenants in proportion to the space they lease.
- Co-tenancy clause
- A retail lease provision that lets a tenant reduce rent or terminate if a named anchor tenant or a specified percentage of the center goes dark.
- Estoppel certificate
- A signed statement from a tenant confirming the terms of its lease, the rent, the security deposit, and that no defaults exist. Buyers and lenders require estoppels to verify the income they are relying on.
- Gross lease
- A lease in which the tenant pays a single rent amount and the landlord pays operating expenses. Common in office buildings. A modified gross lease shares expenses, often with the tenant paying increases above a base year.
- Ground lease
- A long-term lease of land only, in which the tenant builds and owns the improvements during the lease term and the improvements revert to the landowner when the lease ends.
- NN lease (double net lease)
- A lease in which the tenant pays rent, property taxes, and insurance, while the landlord remains responsible for structural items such as roof, foundation, and sometimes parking lot or HVAC replacement.
- Percentage rent
- Additional rent paid by a retail tenant equal to a percentage of its sales above a stated breakpoint. Common in shopping center leases with high-volume tenants.
- Rent escalation
- A scheduled increase in base rent during the lease term, expressed as a fixed percentage, a fixed dollar amount, or an index such as CPI. Escalations protect a landlord's income against inflation.
- Rentable vs. usable square feet
- Usable square feet is the space a tenant actually occupies; rentable square feet adds the tenant's share of common areas such as lobbies and corridors. Office rent is typically quoted on rentable area, and the ratio between the two is the load factor.
- SNDA (subordination, non-disturbance, and attornment)
- An agreement among tenant, landlord, and lender in which the tenant subordinates its lease to the mortgage, the lender agrees not to disturb the tenant's occupancy if it forecloses, and the tenant agrees to recognize the lender as landlord.
- Tenant improvement allowance (TI)
- Money a landlord contributes toward the cost of building out a tenant's space, usually quoted per square foot. Larger allowances are typically traded for longer lease terms or higher rent.