Industrial Real Estate Glossary
Plain-language definitions for every term you'll encounter when buying, selling, or leasing industrial space in Southern California.
Plain-language definitions for every term you'll encounter when buying, selling, or leasing industrial space in Southern California.
The change in occupied industrial space over a given period, calculated by subtracting vacated square footage from newly occupied square footage. Positive net absorption means more space was occupied than vacated — a sign of healthy demand. Negative absorption signals tenants are giving back more space than is being leased.
The listed rental rate for an available space, typically expressed as dollars per square foot per month (e.g., $1.42/SF/mo) or per year. The asking rent is the starting point for negotiation; actual executed rents ("effective rents") are often lower once concessions like free rent or tenant improvement allowances are factored in.
A development arrangement in which a developer constructs a building specifically designed and sized for a single tenant or owner-user. The tenant or buyer typically commits to occupying the building before or during construction. BTS projects allow tenants to customize clear heights, dock configurations, power, and site layout — at the cost of longer lead times (typically 18–30 months from site selection to occupancy).
The ratio of a property's net operating income (NOI) to its market value, expressed as a percentage. A building generating $1,000,000 in annual NOI selling for $20,000,000 has a 5.0% cap rate. Cap rates move inversely to value — lower cap rates indicate higher prices relative to income. Institutional-quality industrial assets in Southern California have traded at 4.25–5.75% cap rates in recent years.
The usable vertical clearance inside a warehouse or distribution building, measured from the finished floor to the lowest overhead obstruction (usually the underside of roof joists or structural steel). Clear height directly determines how high goods can be racked. Modern Class A distribution buildings typically offer 32–40 foot clear heights; older buildings may have 22–28 feet. Clear height is one of the most important spec criteria for logistics and e-commerce tenants.
Major commercial real estate data platforms. CoStar and its subsidiary LoopNet are the dominant listing and analytics platforms for commercial real estate in the U.S., used by brokers, landlords, and tenants to track availability, comps, and market trends. CBRE is one of the largest commercial real estate services firms globally, producing widely cited market research reports.
The legal process by which a government entity acquires private property for public use, with compensation to the owner. Industrial properties along freeway corridors or near planned infrastructure projects can be subject to condemnation. Owners should understand their rights and the fair market value standard that governs compensation.
A distribution building designed so that goods enter from one side (inbound docks) and exit from the opposite side (outbound docks) with minimal storage time in between. Cross-dock buildings are characterized by shallow depth (often 100–180 feet), high dock door counts on both sides, and are used by parcel carriers, LTL freight providers, and time-sensitive distributors. They require more land relative to building area than standard warehouses.
An industrial building that is vacant or unleased, with no tenant in occupancy. Dark buildings represent both a risk to owners (no income) and an opportunity for buyers or tenants seeking immediate occupancy in a supply-constrained market.
A loading door positioned at truck bed height (typically 48–52 inches above grade), allowing trailers to back directly to the building for level transfer of goods. Dock-high doors are the standard loading configuration for distribution and warehouse buildings. The number and spacing of dock doors is a key spec metric. See also: Grade-Level Door.
The investigation period during a real estate transaction — typically 30–60 days — during which the buyer inspects the property, reviews financial records, verifies title, confirms zoning compliance, assesses environmental conditions, and evaluates structural and mechanical systems. During due diligence, the buyer has the right to cancel the purchase and recover their deposit if unsatisfactory conditions are found.
A high-performance fire sprinkler system designed to suppress fires in high-piled storage racking environments. ESFR systems discharge more water faster than standard sprinklers, making them suitable for warehouses storing commodities in high stacks without requiring in-rack sprinklers. ESFR is now the standard specification for Class A distribution buildings and is often required by fire marshals and insurance underwriters.
A lease concession in which the tenant is not required to pay rent for a specified period — typically 1–6 months at the start of the lease term. Free rent is a common tool landlords use to attract tenants without formally reducing the asking rent. The effect is to lower the tenant's effective rent over the full lease term. In a soft market, landlords may offer longer free rent periods; in a tight market, concessions compress.
A lease structure in which the landlord pays all operating expenses — property taxes, insurance, utilities, and maintenance — and the tenant pays a single all-in rent. Rare in industrial real estate; most industrial leases are NNN (triple-net). See also: NNN Lease.
A loading door positioned at ground level, allowing forklifts and ground-level vehicles to drive in and out of the building. Also called "drive-in doors" or "ground-level doors." Grade-level doors are essential for manufacturing and certain distribution uses where ground-level access is required. A building's ratio of dock-high to grade-level doors is an important spec consideration.
The total area of a building measured from the exterior walls, including all floor levels, mezzanines, and office areas. Distinct from Net Rentable Area (NRA), which excludes non-rentable spaces. In industrial leasing, the full GBA is typically the rentable area — tenants pay for the entire building footprint.
Outdoor land used for parking, staging, and storing trailers, containers, vehicles, or equipment — often adjacent to or independent of a warehouse building. IOS has emerged as a distinct asset class in Southern California as tenants compete for limited trailer storage capacity near distribution hubs. Land values for IOS sites near port-adjacent corridors have risen sharply.
The metropolitan region of San Bernardino and Riverside Counties in Southern California, extending roughly from Pomona in the west to San Bernardino and Riverside in the east. The Inland Empire is the largest industrial real estate market in the western United States, driven by proximity to the Ports of Los Angeles and Long Beach, freeway access, and lower land costs than coastal LA. Lee & Associates operates extensively throughout the IE.
A unit within a multi-tenant industrial park, sharing walls with adjacent tenants. In-line spaces typically range from 2,000 to 30,000 SF and are suited for light manufacturing, service businesses, and local distributors. In-line industrial parks are a major component of the small-bay industrial supply in Southern California.
A supply chain management strategy in which goods are ordered and received precisely when needed in the production or distribution process, minimizing inventory holding costs. JIT strategies increase demand for well-located, quickly accessible industrial space near manufacturing or population centers — one reason why location premium in markets like City of Industry and Santa Fe Springs is so durable.
The final leg of the delivery process — from a distribution center or fulfillment hub to the end consumer. Last-mile facilities (also called "urban fulfillment centers" or "urban warehouses") are typically smaller (10,000–100,000 SF), located close to dense population centers, and command rent premiums due to supply scarcity in built-out urban/suburban markets. Southern California's dense population base makes last-mile industrial a highly competitive segment.
Leadership in Energy and Environmental Design — a green building rating system administered by the U.S. Green Building Council. Industrial buildings can achieve LEED certification by meeting standards for energy efficiency, water use, materials, and site considerations. LEED-certified distribution buildings command rent premiums from tenants with sustainability mandates and face lower operating costs. Major developers like Prologis and EastGroup target LEED certification on new construction.
A non-binding document that outlines the principal terms of a proposed lease or sale transaction before a formal contract is drafted. An LOI typically covers price or rent, lease term, option rights, tenant improvement allowance, free rent, and other key deal points. LOIs are used to confirm business terms before both parties invest time in full lease or purchase agreement drafting.
An intermediate floor level built within the warehouse space, typically used for additional storage, office space, or pick-and-pack operations. Mezzanines increase usable square footage without expanding the building footprint. They can be freestanding (installed by the tenant) or built-in. Clear height requirements for mezzanine use are higher — typically 28 feet or more.
The dominant lease structure in industrial real estate. Under a NNN (triple-net) lease, the tenant pays base rent plus the three "nets": property taxes, building insurance, and common area maintenance (CAM) expenses. The landlord retains responsibility for major structural components (roof, foundation, exterior walls) in most NNN leases. NNN leases give landlords a predictable net income stream and shift operating cost variability to tenants.
The square footage on which rent is calculated. In most industrial leases, NRA equals the full building area — unlike office leases where common areas are sometimes excluded. It is critical to confirm whether quoted square footage is NRA or gross building area, as the difference affects total rent obligation.
Annual gross rental income minus operating expenses (property taxes, insurance, management fees, maintenance, etc.), before debt service. NOI is the numerator in the cap rate formula and the primary metric used to value income-producing industrial properties. A $100,000 increase in NOI increases property value by $2,000,000 at a 5.0% cap rate.
A sale or lease executed without a formal public listing on platforms like LoopNet or CoStar. Off-market deals are sourced through broker relationships, direct outreach to property owners, and industry networks. A significant percentage of industrial transactions in supply-constrained markets like City of Industry and Santa Fe Springs trade off-market. Working with a broker who has deep local relationships is essential for accessing these opportunities.
A provision in a lease giving the tenant the right — but not the obligation — to extend the lease for an additional term at predetermined rental terms. Renewal options protect tenants from displacement in tight markets and are a key negotiating point. Landlords typically limit options to one or two terms and may tie the renewal rate to market rent or a CPI adjustment.
A buyer who purchases an industrial building for their own business occupancy, rather than as an investment to lease to third-party tenants. Owner-users benefit from building equity rather than paying rent, and have the flexibility to customize the space to their operations. SBA 504 loans are a common financing vehicle for owner-user acquisitions, requiring as little as 10% down.
The world's largest industrial REIT (Real Estate Investment Trust) and one of the dominant landlords in the Southern California industrial market. Prologis owns and manages logistics facilities globally and is a major player in the Inland Empire and LA Basin markets. Understanding Prologis's leasing activity and market posture is useful context for any industrial occupier or investor in SoCal.
A company that owns, operates, or finances income-producing real estate and is required to distribute at least 90% of taxable income to shareholders. Major industrial REITs active in Southern California include Prologis, Rexford Industrial, EastGroup Properties, and Duke Realty (now part of Prologis). REIT acquisition activity and dispositions are closely watched as indicators of institutional market sentiment.
A Los Angeles-based industrial REIT focused exclusively on infill industrial properties in Southern California. Rexford has been one of the most aggressive acquirers of industrial real estate in the LA Basin, IE, and Orange County over the past decade, with a portfolio concentrated in the exact markets where Lee & Associates operates.
A contractual right giving a tenant or buyer the first opportunity to match any third-party offer the owner receives before the owner can accept that offer. RROFRs protect long-term tenants who want the option to purchase their building if the owner decides to sell. Distinct from a Right of First Offer (ROFO), where the owner must offer the property to the ROFR holder at a price they set before marketing it externally.
A transaction in which an owner-occupant sells their building to an investor and simultaneously executes a long-term lease to remain as a tenant. Sale-leasebacks allow operating businesses to monetize real estate assets, redeploy capital into their core operations, and potentially achieve favorable accounting treatment. They are popular among owner-users who have held their property for many years and have significant equity.
A U.S. Small Business Administration loan program that enables eligible small businesses to purchase owner-occupied commercial real estate with as little as 10% down — compared to 25–30% typically required for conventional commercial real estate loans. The loan is structured with a conventional first mortgage (typically 50% of the purchase price), an SBA-backed debenture (40%), and a 10% equity contribution from the borrower. SBA 504 loans have enabled many Southern California business owners to purchase their industrial facilities.
A building constructed without a pre-committed tenant or buyer — the developer builds on speculation that demand will absorb the space upon or after completion. Spec development is a barometer of developer confidence in market fundamentals. When spec pipelines are large relative to net absorption, vacancy tends to rise; when spec construction slows, the market can tighten quickly as supply digestion catches up.
A lease arrangement in which the original tenant (sublessor) rents part or all of their space to a third party (sublessee) for a period within the original lease term. Sublease space often comes to market at below-asking rents because the original tenant is motivated to offset their rent obligation. Sublease space increased materially in the Inland Empire in 2024–2025 as logistics tenants right-sized their footprints after over-leasing in 2021–2022.
A landlord-provided cash contribution toward the cost of improving leased space to meet the tenant's operational requirements. TI is typically expressed as dollars per square foot (e.g., "$40/SF TI"). The amount varies with market conditions, lease term length, tenant credit quality, and the base condition of the space. In a landlord's market, TI allowances are minimal; in a tenant-favorable market, TI packages expand as landlords compete for occupancy.
The paved area between a building's dock doors and the property boundary, used for truck maneuvering, trailer staging, and loading/unloading operations. Standard truck court depth for Class A distribution buildings is 130–185 feet (measured from the dock doors to the opposite edge of the paved area). Deeper truck courts allow more simultaneous maneuvering and trailer positions. Truck court depth is a critical functional specification for logistics-intensive users.
The percentage of total industrial inventory that is unoccupied and available for lease or sale at a given point in time. Calculated as: (vacant SF ÷ total inventory SF) × 100. A 5% vacancy rate in a 100M SF market means 5M SF is available. Vacancy rates below 3–4% indicate a very tight market; above 8–10% typically signals an oversupplied condition. Southern California's coastal and infill markets (Santa Fe Springs, City of Industry) have historically maintained vacancy well below the IE average.
An investment strategy focused on acquiring properties with below-market rents, near-term lease rollovers, or deferred capital improvements, with the goal of increasing NOI through lease-up, rent mark-to-market, or property upgrades. Value-add industrial buyers in Southern California typically target 1990s–2010s vintage buildings with leases expiring in 12–36 months, where the gap between in-place rent and market rent creates an opportunity to reset to current rates upon renewal or re-leasing.
Software that controls and optimizes the movement and storage of goods within a warehouse. WMS capabilities affect tenant requirements for things like column spacing, clear height, power for automation equipment, and floor flatness (flatness specification, or "F-numbers"). Tenants deploying sophisticated automation typically require higher clear heights, reinforced floors, and greater power supply — factors that affect which buildings in the market can accommodate them.
Local government regulations that specify the permitted uses of land and buildings in designated areas. Industrial zoning categories in Southern California municipalities include light industrial (M-1), general industrial (M-2), and heavy industrial (M-3). Zoning determines what operations can legally occupy a building — a critical check before executing a lease or purchase. Some municipalities have enacted industrial land protection ordinances to prevent conversion of industrial-zoned land to residential, which has preserved industrial supply in markets like Santa Fe Springs and City of Industry.