The industrial market in Phoenix is no longer one market. It's two — and they're moving in opposite directions.
Big-box distribution (100,000+ sf) has softened meaningfully. Vacancy in the Southwest Valley logistics corridor has pushed above 12%, concessions are creeping in, and rental rates on spec product have flattened. The narrative that drove 50 million square feet of speculative development between 2021 and 2024 has cooled.
Small-bay flex (5,000–30,000 sf), on the other hand, is tighter than it's been in a decade. Vacancy is under 4% in most infill submarkets. Rents are at all-time highs. And there's almost no new supply coming.
Why small-bay is outperforming
The demand drivers for small-bay industrial are fundamentally different from big-box:
- Tenant diversity. Small-bay serves HVAC contractors, auto parts distributors, e-commerce fulfillment, specialty food producers, and trades businesses. These tenants are local, growing, and not subject to the same demand swings as national logistics operators.
- No new supply. Small-bay is expensive to build on a per-square-foot basis ($140–$170/sf vs. $90–$110/sf for big-box) and land in infill locations is scarce. Developers can't justify the construction cost basis at current rents in most submarkets, which keeps supply constrained.
- Sticky tenants. A plumbing contractor who builds out a 7,500 sf bay with a showroom, parts storage, and dispatch office isn't moving for a $0.15/sf rent increase. Retention rates on small-bay product run 80–85%, compared to 60–70% for big-box.
- Rent premium. Small-bay product in Phoenix is leasing at $12–$16/sf NNN, compared to $7–$9/sf NNN for big-box. On a per-square-foot basis, small-bay generates 50–80% more rent.
The investment case
Small-bay industrial trades at 5.75–6.75% cap rates in the Phoenix metro — a premium to big-box, but justified by higher rent growth, lower vacancy, and better tenant retention. The value-add play is straightforward: buy an older multi-tenant flex complex, upgrade the common areas and loading infrastructure, mark rents to market, and hold.
The capital stack is clean. Banks are comfortable with small-bay industrial at 65–70% LTV. No rate caps needed. No bridge required. Stabilized day-one cash flow with organic rent growth of 3–5% annually.
What's happening in big-box
The big-box correction is real but not catastrophic. What's happening is a normalization from an overbuilt cycle, not a structural decline in demand. Phoenix still has strong logistics fundamentals — proximity to LA ports, labor availability, land cost advantage over California.
But the near-term math is painful for developers who delivered spec product in 2024–2025. Lease-up timelines have stretched from 6 months to 18+ months. Concessions (free rent, TI allowances) are eating into first-year NOI. And some projects are trading at or below replacement cost.
For buyers, that creates opportunity — if you're patient enough to absorb 12–18 months of lease-up and confident in the long-term logistics thesis.
Our take
If you're allocating capital to industrial in Phoenix today, we'd weight heavily toward small-bay. The risk-adjusted return is better, the tenancy is more stable, and the supply picture is structurally constrained in a way that big-box is not.
We're financing and advising on industrial transactions across both segments. Whether you're buying a 10-bay flex complex or looking at a 200,000 sf distribution center, we'll underwrite it and tell you what we think.
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This article is for informational purposes only and does not constitute investment advice, a solicitation, or an offer to buy or sell any security or real estate interest. All market data, pricing, rent figures, and projections referenced herein are based on sources believed to be reliable as of the date of publication but are not guaranteed for accuracy or completeness. Actual results may vary. Nothing in this article constitutes a commitment to lend or a guarantee of financing terms. Prospective investors should conduct their own due diligence and consult qualified legal, tax, and financial advisors before making any investment decisions.
Vestmont Capital Inc. — Arizona Commercial Mortgage Broker License CMB-0924849 · NMLS# 1045931. Vestmont Inc. — Arizona Department of Real Estate License CO648847000.