Small Bay
Flex Industrial
Real Estate
SmallBay.co is a resource for small bay flex industrial real estate developers, owners, operators, investors, brokers, and anyone looking to learn more about the asset class.

What is small bay and flex industrial?
Small bay industrial is multi-tenant industrial real estate with compact units—typically 500 to 10,000 SF each—that combine warehouse and office space. Buildings can be much larger overall; the unit size is what sets it apart from big-box.
Typical physical traits.
Who leases it.
Related terms.
Tools & calculators.
Free tools for small bay flex industrial real estate—for people interested in or operating these properties.
Monthly Lease Calculator
Estimate monthly base rent, CAM charges, and total occupancy cost for a small bay flex unit.
Tenant Underwriting Calculator
Evaluate tenant creditworthiness with rent-to-revenue ratios, occupancy cost analysis, and risk scoring.
NOI Calculator
Calculate Net Operating Income for your small bay flex property with expense tracking and vacancy assumptions.
DSCR Calculator
Calculate Debt Service Coverage Ratio to evaluate loan feasibility for small bay industrial properties.
CAM Reconciliation Calculator
Calculate tenant CAM shares, true-ups, and annual reconciliation for multi-tenant small bay properties.
Occupancy Cost Ratio Calculator
Calculate a tenant's total occupancy cost (rent + CAM + utilities) as a percentage of revenue to assess affordability risk.
Cash-on-Cash Return Calculator
Calculate cash-on-cash return on a small bay acquisition from down payment, closing costs, NOI, and annual debt service.
Yield on Cost Calculator
Calculate yield on cost and development spread from stabilized NOI, total project cost, and comparable market cap rate.
Rent Escalation Calculator
Project a year-by-year base rent schedule from fixed percentage, fixed dollar, or CPI-style escalations over a lease term.
Latest from the blog.
Articles on small bay flex industrial, leasing, and related terms.
From Multifamily to Small Bay Industrial
Why apartment investors look at small bay: shared multi-tenant cash flow, longer leases, trade tenants, and where your multifamily playbook breaks.
What is Last-Mile Industrial?
Last-mile industrial is local fulfillment and delivery space near customers. How it overlaps small bay flex parks, grade-level doors, and dock-high needs.
What is Cap Rate (and How Do You Calculate It)?
Cap rate is NOI divided by property value. Going-in vs exit caps, what moves small bay industrial yields, and how to calculate the number.
What is a Triple Net (NNN) Lease?
A triple net (NNN) lease passes taxes, insurance, and CAM to the tenant on top of base rent. How NNN works in small bay industrial, vs modified gross.
Small bay vs. big-box industrial.
Big-box warehouses usually serve one large occupier. Small-bay properties divide space among many tenants in smaller units.