Commercial Real Estate Terms Explained

Below are the most commonly used commercial real estate terms explained in simple language.

What is WALT (Weighted Average Lease Term)?

WALT (Weighted Average Lease Term) is the average remaining lease term across all tenants in a property, weighted by rent or square footage.

WALT matters because longer remaining lease terms generally indicate more stable income, while shorter WALT can signal higher rollover and vacancy risk.

What is WALT-R?

WALT-R is the weighted average remaining lease term calculated using rental income as the weighting factor rather than square footage.

WALT-R helps show how long your current income is secured, since the largest rent-paying tenants have the biggest impact on the metric.

What is a Triple Net (NNN) Lease?

A Triple Net (NNN) lease is a lease structure where the tenant pays base rent plus property taxes, insurance, and common area maintenance or operating expenses.

NNN leases are popular with investors because they typically reduce landlord expense exposure and can produce more predictable net income.

Read more about NNN leased properties.

What is a Gross Lease?

A gross lease is a lease where the tenant pays a fixed rent and the landlord pays most or all operating expenses such as taxes, insurance, and maintenance.

Gross leases are common in office properties because tenants like predictable monthly costs and landlords control the building’s operating budget.

What is a Modified Gross Lease?

A modified gross lease is a lease where the tenant pays base rent and the landlord and tenant share operating expenses based on the lease terms.

This structure is flexible and often used in office leasing, where specific expenses may be included or passed through depending on the deal.

What is Base Rent?

Base rent is the minimum rent a tenant pays before additional charges such as CAM, taxes, or insurance are added.

Base rent is typically quoted per square foot and forms the foundation for calculating a tenant’s total occupancy cost.

What is Effective Rent?

Effective rent is the average rent over a lease term after factoring in concessions such as free rent, tenant improvement allowances, or other incentives.

Effective rent shows the true cost of occupancy and helps compare lease offers that may have different concessions or structures.

What are CAM Charges?

CAM charges (Common Area Maintenance) are fees tenants pay to cover shared property costs such as landscaping, security, repairs, and maintenance of common areas.

CAM charges are usually allocated by a tenant’s proportionate share of the property and can meaningfully affect total monthly occupancy cost.

Read more about CAM and NNN lease expenses.

What is a Rent Escalation?

A rent escalation is a scheduled rent increase during the lease term, often structured as a fixed annual percentage or tied to an index.

Escalations help rents keep pace with inflation and market changes, and they improve income growth over long-term leases.

What is a Lease Term?

Lease term is the length of time a lease is in effect, from the commencement date through the expiration date.

Longer lease terms typically provide more income stability, while shorter terms can provide flexibility but increase rollover risk.

What is a Commencement Date?

The commencement date is the date a lease officially begins and rent obligations start, which may differ from the lease signing date.

The commencement date drives the rent schedule, escalation timing, and the start of the lease term for reporting and underwriting.

What is Rent Abatement?

Rent abatement is a lease incentive where a tenant receives a period of free or reduced rent, most commonly at the start of the lease.

Rent abatement lowers upfront occupancy costs for tenants and can help landlords attract or retain tenants in competitive markets.

What is Tenant Improvement (TI)?

Tenant improvements (TI) are build-out changes made to a leased space to meet a tenant’s requirements, such as walls, offices, lighting, or finishes.

TI impacts leasing economics because build-out scope affects timing, cost, and how quickly a tenant can occupy and operate in the space.

What is a TI Allowance?

A TI allowance is money a landlord contributes toward tenant improvements, typically quoted as a dollar amount per square foot.

TI allowances reduce tenant out-of-pocket build-out cost and are a common negotiation point in office and industrial leases.

What is a Security Deposit in CRE?

A security deposit is funds held by the landlord to protect against unpaid rent, tenant default, or damage beyond normal wear and tear.

Security deposits are usually refundable at lease end if lease obligations are met and the space is returned in agreed condition.

What is Cap Rate (Capitalization Rate)?

Cap rate is the ratio of a property’s net operating income (NOI) to its purchase price or market value, expressed as a percentage.

Cap rate is used to compare investment pricing and risk; higher cap rates often indicate higher perceived risk or weaker income stability.

What is Net Operating Income (NOI)?

Net Operating Income (NOI) is a property’s income after operating expenses are deducted, before debt service, taxes, and capital expenditures.

NOI is a core valuation metric because it drives pricing, cap rates, and a property’s ability to support financing.

What is Internal Rate of Return (IRR)?

Internal Rate of Return (IRR) is the annualized rate of return that accounts for all cash flows over an investment holding period, including sale proceeds.

IRR is used to compare investments with different timing of cash flows, leverage, and exit assumptions.

What is Cash-on-Cash Return?

Cash-on-cash return is the annual pre-tax cash flow from an investment divided by the total cash invested.

It shows the investor’s year-one (or annual) cash yield on equity and is commonly used to evaluate income-producing properties.

What is Gross Rent Multiplier (GRM)?

Gross Rent Multiplier (GRM) is a valuation metric calculated by dividing a property’s price by its gross rental income.

GRM is a quick comparison tool, but it ignores operating expenses, so it should be used alongside NOI-based metrics.

What is Debt Service Coverage Ratio (DSCR)?

Debt Service Coverage Ratio (DSCR) measures a property’s ability to cover its loan payments by dividing NOI by annual debt service.

Lenders use DSCR to assess risk; higher DSCR generally indicates a stronger cushion to pay debt from operating income.

What is Loan-to-Value (LTV)?

Loan-to-Value (LTV) is the loan amount divided by the property’s appraised value or purchase price, expressed as a percentage.

Lower LTV typically means more borrower equity and lower lender risk, while higher LTV increases leverage and risk.

What is Yield in Real Estate?

Yield is the income return on a property expressed as a percentage of its cost or value, often calculated from NOI or cash flow.

Yield helps compare returns across properties, but the best measure depends on whether you’re looking at unlevered returns, leveraged returns, or total returns.

What is a Pro Forma?

A pro forma is a forward-looking projection of a property’s income, expenses, and cash flow based on assumptions.

Pro formas are used in underwriting to estimate performance, test scenarios, and evaluate lease-up, rent growth, and expense changes.

What is an Exit Cap Rate?

An exit cap rate is the capitalization rate assumed at the time of sale to estimate a property’s future value.

Exit cap rate assumptions directly affect projected sale price and returns, so conservative assumptions are typically used in underwriting.

What is Rentable Square Footage (RSF)?

Rentable square footage (RSF) is the space a tenant pays rent on, typically equal to usable square footage plus a share of common areas.

RSF is used to calculate rent and often differs from the tenant’s actual occupiable area due to load factor.

What is Usable Square Footage (USF)?

Usable square footage (USF) is the area a tenant exclusively occupies, excluding building common areas such as lobbies, corridors, and shared restrooms.

USF reflects the tenant’s true working or operating space, while RSF is the basis for rent calculations.

What is Load Factor?

Load factor is the percentage added to usable square footage to account for a tenant’s share of common areas, producing rentable square footage.

A higher load factor increases RSF and total rent, even if the tenant’s usable space does not change.

What is a Common Area?

A common area is shared building or site space used by multiple tenants, such as lobbies, hallways, parking areas, and restrooms.

Common areas are typically maintained by the landlord and paid for through CAM charges or operating expense pass-throughs.

What is a Building Class (Class A, B, C)?

Building class (Class A, B, or C) is an informal way to describe a property’s quality, location, condition, and amenities relative to its market.

Class A properties are typically newer and best-in-market, Class B are average with solid functionality, and Class C are older with fewer amenities or deferred maintenance.

What is Vacancy Rate?

Vacancy rate is the percentage of a property or market’s total space that is currently unoccupied and available for lease.

Higher vacancy rates can indicate weaker demand or oversupply, while lower vacancy rates typically reflect tighter market conditions.

What is Absorption in Real Estate?

Absorption is the amount of space leased or occupied in a market over a specific period, often reported as net absorption.

Positive absorption indicates demand is outpacing move-outs, while negative absorption suggests tenants are giving back space.

What is a Letter of Intent (LOI)?

A Letter of Intent (LOI) is a document that outlines the key proposed terms of a lease or purchase before a formal contract is drafted.

Most LOIs are non-binding, but they help both parties align on economics and deal structure before legal documentation begins.

What is a Lease Assignment?

A lease assignment is a transfer of a tenant’s lease rights and obligations to another party, subject to the lease terms and landlord approval.

In an assignment, the new tenant becomes the occupying tenant, and the original tenant may remain liable depending on the lease language.

What is Subleasing?

Subleasing is when a tenant rents out some or all of its leased space to another tenant while remaining responsible to the landlord under the original lease.

Subleasing can reduce occupancy cost when a tenant has excess space, but it typically requires landlord consent and compliance with lease terms.

What is a Personal Guarantee?

A personal guarantee is a commitment by an individual to be personally responsible for lease obligations if the tenant entity defaults.

Landlords often require personal guarantees for newer or smaller businesses to reduce credit risk.

What is a Use Clause?

A use clause is a lease provision that defines the permitted business activities and how a tenant may use the leased premises.

Use clauses protect landlords and other tenants by controlling incompatible uses and maintaining the desired tenant mix.

What is an Exclusivity Clause?

An exclusivity clause is a lease provision that restricts the landlord from leasing space to certain competing businesses within the same property.

Exclusivity clauses are common in retail centers to protect tenant sales and preserve the tenant mix.

What is a Kick-Out Clause?

A kick-out clause is a lease provision that allows a party to terminate the lease if specific conditions are met, such as sales performance thresholds.

Kick-out clauses provide flexibility, but the triggers and notice requirements are negotiated and must be clearly defined.

What is a Co-Tenancy Clause?

A co-tenancy clause is a lease provision that provides tenant remedies if key tenants leave or occupancy drops below a defined level.

Remedies may include reduced rent or termination rights, and co-tenancy is most common in retail where traffic is tied to anchor tenants.

What is Due Diligence in CRE?

Due diligence is the investigation period where a buyer or tenant evaluates a property’s financials, condition, leases, and legal status before closing.

Due diligence helps identify risks, confirm assumptions, and avoid surprises related to income, expenses, condition, or title.

What is an Off-Market Deal?

An off-market deal is a transaction that is negotiated privately without being publicly listed or broadly marketed.

Off-market transactions can reduce competition and preserve confidentiality, but they rely heavily on relationships and market access.

What is a Sale-Leaseback?

A sale-leaseback is a transaction where an owner sells a property and simultaneously leases it back from the buyer, remaining as the tenant.

Sale-leasebacks allow the seller to unlock capital while keeping operational control of the location under a long-term lease.

What is a 1031 Exchange?

A 1031 exchange is an IRS-approved process that allows an investor to defer capital gains taxes by reinvesting proceeds into another like-kind investment property.

1031 exchanges have strict timing and compliance rules, so investors typically use a qualified intermediary to complete the exchange.

What is Fee Simple Ownership?

Fee simple ownership is the most complete form of real property ownership, giving the owner full rights to use, sell, and transfer the property subject to laws and restrictions.

Fee simple is the most common ownership type for commercial properties in the U.S.

What is a Ground Lease?

A ground lease is a long-term lease of land where the tenant may develop improvements on the land while the landowner retains land ownership.

At the end of the ground lease term, the land and improvements may revert to the landowner depending on the lease structure.

What is Title Insurance?

Title insurance is a policy that protects buyers and lenders against financial loss from title defects, liens, or ownership disputes that were not discovered before closing.

Title insurance reduces transaction risk by helping ensure clear title and providing coverage if issues arise later.

What is Escrow in Real Estate?

Escrow is a neutral arrangement where a third party holds funds and documents until transaction conditions are satisfied and closing can occur.

Escrow helps protect both sides by ensuring money and documents are exchanged only when agreed requirements are met.

What is Market Rent?

Market rent is the rental rate a property is expected to achieve under current market conditions based on comparable leases and demand.

Market rent is used to price leases, evaluate renewals, and underwrite investments.

What is Highest and Best Use?

Highest and best use is the most profitable use of a property that is legally permitted, physically possible, financially feasible, and maximally productive.

This concept guides valuation, redevelopment decisions, and investment strategy by identifying the best economic use of the site.