# SmallBay.co — Small Bay Flex Industrial Real Estate > An educational resource for small bay flex industrial real estate professionals — owners, operators, managers, and brokers. **URL:** https://www.smallbay.co **Updated:** 2026-07-19 --- ## What Is Small Bay Industrial? Small bay industrial (also called flex industrial, contractor bays, or garage condos) is a commercial real estate asset class featuring multi-tenant buildings 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. ### It goes by many names Flex space, flex industrial, contractor garage, office warehouse, garage condo, service bay, and others. There is no single industry-standard term. Brokers and operators often use different names for the same product. [17 names for this asset class](/blog/17-names-same-asset). ### Typical physical traits Clear heights around 12–24 ft, grade-level or dock-high doors, and a small office or showroom component (often about 10–30% of the unit). Lease terms are commonly 1–3 years. ### Who leases it Trade contractors (HVAC, plumbing, electrical, GCs), distributors, light manufacturers, and service businesses. Some markets also see fitness, auto detail, and other non-traditional uses. [Who leases small bay](/blog/who-leases-small-bay-industrial). ### Related terms [Flex industrial](/blog/what-is-flex-industrial) describes the adaptable office-warehouse layout. [Small-bay industrial](/blog/what-is-small-bay-industrial) emphasizes multi-tenant buildings with smaller unit sizes. In practice the terms overlap a lot. --- ## 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. | Dimension | Small Bay | Big-Box | | --- | --- | --- | | Unit size | 500–10,000 SF per unit | Much larger, often single-user | | Tenant mix | Multi-tenant: contractors, distributors, service businesses | Typically logistics or large industrial users | | Lease length | 1–3 years typical | Usually longer terms | | Layout | Office + warehouse in one bay, drive-in doors | Warehouse-heavy with dock infrastructure | --- ## Key Market Data | Metric | Small Bay | Big-Box Industrial | | --- | --- | --- | | Vacancy rate | ~4.2% | ~7.4% | | Rent PSF | $12–25 | $6–10 | | Rent growth since 2020 | 40%+ | — | | Typical unit sizes | 500–10,000 SF | 50,000+ SF | | Ceiling heights | 14–24 ft clear | 28–40 ft clear | | Lease terms | 1–3 years | 5–10 years | | Tenants per property | 10–100+ | 1–3 | --- ## Tools & Calculators Free calculators for small bay flex industrial professionals. - [Monthly Lease Calculator](/tools/lease-calculator) — Calculate monthly lease payments, CAM charges, and total occupancy costs - [Tenant Underwriting Calculator](/tools/tenant-underwriting-calculator) — Evaluate tenant creditworthiness with rent-to-revenue ratios and risk scoring - [NOI Calculator](/tools/noi-calculator) — Calculate Net Operating Income with expense tracking and vacancy assumptions - [Cap Rate Calculator](/tools/cap-rate-calculator) — Determine capitalization rates and property valuations based on NOI - [DSCR Calculator](/tools/dscr-calculator) — Calculate Debt Service Coverage Ratio to evaluate loan feasibility - [CAM Reconciliation Calculator](/tools/cam-reconciliation-calculator) — Calculate tenant CAM shares, true-ups, and annual reconciliation - [Occupancy Cost Ratio Calculator](/tools/occupancy-cost-calculator) — Calculate a tenant's total occupancy cost as a percentage of revenue - [Cash-on-Cash Return Calculator](/tools/cash-on-cash-calculator) — Calculate cash-on-cash return on a small bay acquisition - [Yield on Cost Calculator](/tools/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](/tools/rent-escalation-calculator) — Project a year-by-year base rent schedule from fixed or CPI-style escalations --- ## Investment Metrics - [Yield on Cost (YoC)](/glossary/yield-on-cost) — A development or value-add return measure: stabilized annual NOI divided by total project cost. The difference between YoC and the comparable market cap rate is the development spread. - [Cap Rate](/glossary/cap-rate) — A property valuation measure: NOI divided by market value. - [Cash-on-Cash Return](/glossary/cash-on-cash-return) — An investor cash-return measure: annual pre-tax cash flow divided by total cash invested. --- ## Blog Articles Educational content covering small bay flex industrial real estate. - [What is Small-Bay Industrial?](/blog/what-is-small-bay-industrial) — Comprehensive guide to small-bay industrial: unit sizes, multi-tenant structures, typical lease terms, tenant types, and investment characteristics - [What is Flex Industrial?](/blog/what-is-flex-industrial) — Explains flex space — buildings combining warehouse, light manufacturing, and office in adaptable configurations - [Who Leases Small Bay and Flex Space?](/blog/who-leases-small-bay-industrial) — The evolving tenant mix: traditional contractors, CrossFit gyms, golf simulators, and cold plunge studios - [17 Names, One Asset Class](/blog/17-names-same-asset) — 17+ alternative names for small-bay industrial and why terminology varies by market - [Gross, Modified Gross, or NNN — What Lease Type Should I Use?](/blog/gross-modified-gross-or-nnn-leases) — Comparing lease structures and their impact on cash flow, tenant relationships, and property value - [What is CAM Reconciliation?](/blog/what-is-cam-reconciliation) — The annual process of comparing estimated CAM charges to actual expenses - [The Best Places to List Small Bay Industrial Property](/blog/best-places-to-list-small-bay-industrial) — Where to post space to maximize exposure: LoopNet, Crexi, CoStar, Facebook Marketplace, and more - [Branding Your Small Bay Portfolio](/blog/branding-your-small-bay-portfolio) — How operators build a brand that attracts quality tenants and supports premium rents - [Flex Industrial vs Self Storage: A Side-by-Side Guide](/blog/small-bay-flex-vs-self-storage) — Neutral comparison on use cases, unit size, lease terms, operations, and underwriting --- ## Site Structure | Section | URL | Description | | --- | --- | --- | | Homepage | / | Overview of small bay flex industrial | | Blog | /blog | Educational articles | | Tools | /tools | Free calculators | | Glossary | /glossary | Key terms and definitions | | Contact | /contact | Get in touch | | Insights | /insights | Newsletter | --- ## Top Markets South Florida, Phoenix, Dallas-Fort Worth, Atlanta, and the Carolinas lead in small bay industrial activity due to strong population growth, diverse local economies, limited land for new development, high concentration of trade businesses, and e-commerce fulfillment demand. --- ## Attribution **Site:** https://www.smallbay.co **Content by:** Smallbay Team **Cite as:** "Smallbay.co" **Market statistics current as of:** mid 2026