Small Bay Industrial Guide: Definitions, Specs, Rents and Uses
Last updated: November 11, 2026
Key Takeaways
- Small bay industrial means multi-tenant buildings divided into smaller units. Cushman & Wakefield puts shallow-bay buildings under 150,000 SF with spaces of 5,000 to 50,000 SF; CBRE uses buildings under 50,000 SF with 14 to 28 feet of clear height.
- In Cushman & Wakefield’s data it is the tightest size segment. C&W’s latest shallow-bay vacancy reading was 4.8% in Q2 2026, against 6.8% overall U.S. industrial vacancy in Q3 2026.
- Small units usually rent for more per square foot. In Calgary, spaces under 25,000 SF ask C$13.82/SF/yr net against C$11.32 for spaces over 100,000 SF (C&W, Q3 2026).
- Supply barely grows. CBRE counts more than 80% of shallow-bay inventory as built before 2000 and only 5% since 2010.
- Micro bay units, often under 5,000 SF with a single drive-in or dock door, serve contractors, e-commerce sellers, makers and other small operators.
Small bay industrial is warehouse and light industrial space in multi-tenant buildings split into smaller units, typically a few thousand to 50,000 SF each, with shallow depths and their own loading. It serves local and regional businesses that need real industrial space without leasing a whole building.
This guide covers how the major research firms define small bay, the specs to check, what it rents for compared with larger space, who uses it, and how to evaluate a unit. Figures are sourced and dated; market data reflects Q3 2026 reports unless labelled otherwise.
What Is Small Bay Industrial Space?
Small bay industrial space is the small-unit end of the industrial market: buildings designed or subdivided for several tenants, each with its own entrance, loading door and utilities. There is no single industry definition, so it helps to know how each research firm draws the line.
| Source | Definition | Notes |
|---|---|---|
| Cushman & Wakefield (2025 study) | Shallow-bay multitenant warehouses under 150,000 SF | Spaces commonly 5,000 to 50,000 SF on three- to five-year leases; ceiling heights of 24 to 32 feet; building depths of 120 to 200 feet; mainly dock-high loading |
| CBRE (March 2026) | Buildings under 50,000 SF with clear heights of 14 to 28 feet | Used for CBRE’s shallow-bay vacancy and rent analysis |
| Link Logistics | Smaller-footprint buildings, generally under 100,000 SF, divided into individual suites | Treats “shallow bay” and “small bay” as largely interchangeable |
Sources: Cushman & Wakefield, Smaller Warehouse, Bigger Performance (February 2025); CBRE, shallow-bay industrial brief (March 24, 2026); Link Logistics small bay guide.
Because the definitions differ, vacancy and rent figures from different firms are not interchangeable. When you compare markets, compare like with like and note whose series you are using.
Small Bay vs. Micro Bay
Micro bay is the smallest end of small bay. Link Logistics describes microbay suites as often under 5,000 SF, typically with a single drive-in or dock door and minimal office build-out. Micro bay buildings hold many tenants, which makes them a fit for operators who need a few hundred to a few thousand square feet of real industrial space.
Small Bay vs. Big-Box Warehouses
Big-box distribution buildings run from a few hundred thousand to more than a million square feet and lease to a single tenant on longer terms. Small bay leases to many tenants on shorter terms. The two segments move differently: in Q3 2026, vacancy in U.S. buildings of 500,000 SF or more fell 280 basis points over the year to 7.4%, while C&W’s most recent shallow-bay figure, from Q2 2026, was 4.8%. Our small-bay vs. big-box analysis tracks the gap quarter by quarter.
What Specs Should You Check in a Small Bay Unit?
Small bay buildings vary more than modern bulk warehouses, so check each unit against your operation rather than assuming a standard. The table summarizes the ranges sources cite and what each spec affects.
| Spec | Typical range | Why it matters |
|---|---|---|
| Unit size | Under 5,000 SF (micro bay) to about 50,000 SF | Sets rent, staffing and whether you can grow in place |
| Clear height | 14 to 28 feet (CBRE, buildings under 50,000 SF); 24 to 32 feet (C&W, shallow-bay buildings under 150,000 SF) | Limits racking height and storage density |
| Building depth | 120 to 200 feet (C&W) | Shallow depth keeps loading close to every part of the unit |
| Loading | Mainly dock-high, with some grade-level doors (C&W); micro bay often one drive-in or dock door | Determines whether you can take trailers, box trucks or only vans |
| Office share | Often a small front office | More finished office raises rent and cuts usable warehouse area |
| Power | Varies widely; older stock may need upgrades | Check amperage and phase before signing for equipment users |
Sources: C&W (2025), CBRE (2026), Link Logistics; office share and power rows are WareCRE guidance. The CBRE and C&W ranges differ because the firms define small bay differently. Ranges are typical, not limits; confirm each unit’s specs with the landlord.
For a deeper look at clear height, dock types, truck courts and electrical service, see our guide to loading docks, ceiling heights and power requirements.
Column Spacing and Racking
Older small bay buildings often have tighter column grids than modern bulk warehouses, which can limit racking layouts and forklift aisles. If your operation depends on high-density pallet storage, map your racking plan against the column grid before you commit. Shelving, floor-stack and pick-from-bin operations are usually less sensitive to column spacing.
How Tight Is the Small Bay Market?
In Cushman & Wakefield’s data, shallow bay is the tightest size segment. C&W’s February 2025 study, which defines shallow-bay as buildings under 150,000 SF, put vacancy at 4.8% at the end of 2024. Its Q2 2026 MarketBeat again reported 4.8%, the lowest of any size segment it tracks, though the MarketBeat does not state the size range behind that figure. Overall U.S. industrial vacancy was 6.8% in Q3 2026.
The ranking depends on how a firm slices the market. Savills’ Q3 2026 report puts buildings of 750,000 SF and up lowest among its size segments, at 6.5%.
4.8%
C&W shallow-bay vacancy, Q2 2026
6.8%
U.S. industrial vacancy, overall, Q3 2026
6.4%
CoStar small-bay availability, June 2026
5%
Share of CBRE shallow-bay inventory built since 2010
Other series point the same way. CoStar reported small-bay availability of 6.4% in June 2026, against 10.9% for the broader logistics market, and noted that Phoenix and Austin, which added more small-bay supply in recent years, have higher vacancy for the segment. The segment is not immune to the economy: CoStar also said heightened economic uncertainty had weighed on small-business expansion plans over the past year.
Why So Little New Small Bay Gets Built
CBRE found that nearly half of shallow-bay inventory was built before 1980 and more than 80% before 2000, and that properties built since 2010 account for only 5% of the total. It cites rising construction costs, higher land prices in urban locations and tenant preferences for modern amenities, and notes that new development over the past decade has been largely big-box. Multi-tenant projects also carry more leases, demising walls, separate utilities and management than a single-tenant building on the same land.
Looking for small bay or micro bay space?
Browse Warehouse ListingsHow Much Does Small Bay Industrial Space Rent For?
Small bay space usually rents for more per square foot than large blocks in the same market, because supply is scarce and each unit carries its own loading, utilities and management. No source publishes a current national small-bay rent in dollars per square foot, so the clearest evidence comes from markets where brokers publish rents by size or product type.
| Market (source) | Basis | Small-format segment | Large-format segment |
|---|---|---|---|
| Calgary (C&W) | Space size | Under 25,000 SF: C$13.82/SF/yr net | Over 100,000 SF: C$11.32/SF/yr net |
| Salt Lake City (C&W) | Building size | 10,000–50,000 SF facilities: $1.14/SF/mo NNN ($13.68/yr) | Big-box over 100,000 SF: $0.85/SF/mo NNN ($10.20/yr) |
| Portland business parks (Kidder Mathews) | Business park size | 10,000–49,999 SF parks: $1.08/SF/mo NNN ($12.96/yr), 8.7% vacant | 150,000+ SF parks: $0.84/SF/mo NNN ($10.08/yr), 13.9% vacant |
| San Diego (C&W) | Product type | Incubator multi-tenant/flex: $1.72/SF/mo NNN ($20.64/yr), 6.2% vacant | Warehouse/distribution: $1.30/SF/mo NNN ($15.60/yr), 10.9% vacant |
Sources: Cushman & Wakefield Q3 2026 Industrial MarketBeats for Calgary, Salt Lake City and San Diego; Kidder Mathews Portland Industrial Market Report Q3 2026. Asking rents; size bands follow each source. San Diego compares product types, and incubator/flex space carries more office finish, so part of its premium is not a size effect.
Over the long run, CBRE found that shallow-bay asking rents were more than 50% higher by 2025 than in 2010. Many small bay leases are triple-net, so confirm the structure and budget for taxes, insurance and common-area maintenance on top of base rent where they apply. Our warehouse lease types guide explains how NNN, gross and modified gross leases change the total.
For Tenants
Compare total occupancy cost per month, not the headline rate. A smaller unit at a higher rate per square foot can still cost less in total than an oversized block you only half use.
Who Leases Small Bay Space?
Small bay tenants are mostly local and regional businesses. C&W describes them as smaller local or regional tenants on three- to five-year terms, and CBRE ties demand to service-oriented users, last-mile distribution and small and mid-sized businesses that serve local economies.
| User | Typical need | What to look for |
|---|---|---|
| Contractors and trades | Tool and material storage, vehicle access, dispatch | Drive-in doors, yard or parking, easy highway access |
| E-commerce and wholesale sellers | Inventory, packing, parcel pickup | Dock or grade door, shelving layout, carrier access |
| Light manufacturers and assemblers | Production cells, equipment, staging | Power capacity, clear height, floor load |
| Food and beverage producers | Production, cold or dry storage | Permitted use, drains, utilities, health code fit |
| Local distributors | Same-day and next-day delivery | Location near customers, loading for box trucks |
| Makers and repair shops | Workshop space with storage | Ventilation, power, zoning for the use |
If you are scaling a production business, our guide to manufacturing space requirements by growth stage helps size the move.
How to Evaluate a Small Bay Unit
- Confirm the permitted use. Check zoning and the lease use clause for your actual operation, especially for food, chemicals, vehicles or assembly.
- Match loading to your vehicles. Dock-high doors suit trailers and box trucks; grade-level drive-in doors suit vans and pickups.
- Measure clear height and the column grid. Both limit racking. Bring your racking plan to the tour.
- Check power and HVAC. Ask for amperage, voltage and phase, and whether the warehouse area is heated, cooled or ventilated.
- Price the whole lease. Get NNN estimates, utilities and any CAM caps in writing.
- Plan for growth. Ask whether adjacent units turn over, and whether the landlord allows expansion or relocation within the park.
What Should Owners and Investors Know About Small Bay?
For owners, small bay’s appeal is low vacancy, scarce new supply and rent per square foot that usually exceeds large-block rates. The trade-off is management: more leases, more turnover and more tenant service per square foot. Older buildings often need upgrades to power, lighting, loading and unit layouts to compete, and those upgrades are where value-add owners find returns. C&W’s 2025 study reported that shallow-bay industrial has delivered unlevered returns over five, ten and fifteen years that exceeded the broader market.
Market conditions vary by metro. Use the Industrial Market Intelligence Hub for current vacancy, rents and pipeline in 33 U.S. and Canadian markets.
Find small bay and micro bay industrial space
Compare listings with sizes, clear heights, loading and pricing.
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Frequently Asked Questions
What is small bay industrial space?
Small bay industrial space is warehouse and light industrial space in multi-tenant buildings divided into smaller units, each with its own entrance and loading. Cushman & Wakefield defines shallow-bay buildings as under 150,000 SF with spaces of 5,000 to 50,000 SF, while CBRE uses buildings under 50,000 SF with 14 to 28 feet of clear height.
What is the difference between small bay and micro bay?
Micro bay is the smallest end of small bay. Micro bay suites are often under 5,000 SF, typically with a single drive-in or dock door and minimal office, and suit contractors, e-commerce sellers and makers. Small bay units more commonly range from about 5,000 to 50,000 SF in multi-tenant buildings with dock-high or grade-level loading.
What is the vacancy rate for small bay industrial?
Cushman & Wakefield’s most recent shallow-bay vacancy figure was 4.8% in Q2 2026, the lowest of any size segment in its data, against 6.8% overall U.S. industrial vacancy in Q3 2026. CoStar reported small-bay availability of 6.4% in June 2026, compared with 10.9% for the broader logistics market.
How much does small bay industrial space cost?
Small bay usually rents for more per square foot than large blocks in the same market. In Q3 2026, Calgary spaces under 25,000 SF asked C$13.82/SF/yr net against C$11.32 for spaces over 100,000 SF, and Salt Lake City facilities of 10,000 to 50,000 SF asked $1.14/SF/mo NNN against $0.85 for big-box buildings, per Cushman & Wakefield.
Why is small bay industrial space hard to find?
Little new small bay gets built. CBRE found that more than 80% of shallow-bay inventory was built before 2000 and only 5% since 2010, citing construction costs, urban land prices and tenant preferences for modern amenities. New development has concentrated in big-box buildings, so small units turn over rather than multiply.
Who uses small bay industrial space?
Mostly local and regional businesses: contractors and trades, e-commerce and wholesale sellers, light manufacturers, food producers, local distributors and repair shops. CBRE ties shallow-bay demand to service-oriented users, last-mile distribution and small and mid-sized businesses that serve local economies.
Sources: Cushman & Wakefield, Smaller Warehouse, Bigger Performance (February 2025); Cushman & Wakefield U.S. Industrial MarketBeat Q2 2026 (shallow-bay vacancy) and Q3 2026 (national vacancy, big-box vacancy); Savills, State of the U.S. Industrial Market Q3 2026; Cushman & Wakefield Q3 2026 Industrial MarketBeats for Calgary, Salt Lake City and San Diego; Kidder Mathews Portland Industrial Market Report Q3 2026; CBRE, Shallow-Bay Industrial Availability Remains Tight Amid Strong Demand (March 24, 2026); CoStar press release (June 16, 2026); Link Logistics, Small Bay Industrial Space guide. Each report reflects the most recent vacancy, rental, and construction data available at the time of publication.
