How I Underwrote an IOS Yard — and Why Rent-Per-Acre and Zoning, Not the Cap Rate, Made the Call

A broker sent me an industrial outdoor storage deal — a few acres of fenced, stabilized yard with a small office-and-shop building, leased to a logistics tenant parking trucks and trailers on it. The package priced it like a small industrial building: a cap rate on the income, a per-square-foot number on the structure. On that framing it looked ordinary. Fine, not exciting.

I underwrote it completely differently, and the deal turned out to be both more interesting and far riskier than the cap rate suggested — because an IOS yard isn't a building with some land around it. It's a piece of land with a building incidentally on it, and almost everything that matters lives in the dirt and the zoning, not the income line. Here's how I got there.

(Composite, anonymized — the process is the point, not the property.)

What IOS actually is

Industrial outdoor storage is low-coverage land — gravel or paved yard — leased for storing trucks, trailers, containers, equipment, and materials. The building, if there is one, is a small office or maintenance shop. The value isn't the structure; it's the usable, drained, fenced, properly zoned acreage and the legal right to store things outside on it. That's why IOS trades on rent per acre, not rent per square foot. Get the unit of measurement wrong and you've misframed the entire deal before you've started.

Trap one: pricing it like a building

The broker package led with a cap rate built on a per-square-foot building basis. Wrong unit. On IOS, you underwrite rent per usable acre and the land yield — what the dirt is worth at a target cap relative to comparable yard rents. (The IOS land yield calculator does exactly this: rent per acre, land yield, and value at a target cap.)

When I re-cut the numbers on rent per acre against actual yard comps in the submarket, the picture changed completely. The per-SF framing had hidden whether the in-place rent was below market (upside I could push) or above it (risk I'd inherit). On a land asset, the building cap rate tells you almost nothing — the yard rent per acre tells you everything.

Trap two: it's really a covered-land play

The deeper I went, the clearer it became that this wasn't a stabilized-income deal at all. It was a covered land play: the in-place yard rent comfortably covers the carry while you hold optionality on a higher-and-better use down the road.

That's a perfectly good thesis — but it changes what you're underwriting. You're no longer buying income; you're buying optionality, and the rent is just the thing that pays you to wait. The question stops being "is the cap rate good" and becomes "is the optionality real, and how long until I can realize it." Those are completely different deals with completely different right prices, and the broker package was selling the first while the asset was actually the second.

The question that decides it: is the use even legal — durably?

Here's where IOS deals live or die, and where the package was silent. Zoning and use durability.

Outdoor storage is a use a lot of municipalities tolerate rather than welcome. In many markets the IOS use is legal non-conforming — grandfathered under old zoning that current code no longer permits. That is a fragile position. If the tenant leaves and the yard sits vacant past a defined period, or if you try to change the use, you can lose the non-conforming right entirely — and with it both the income and a large slice of the land value. Some municipalities are actively rezoning specifically to push IOS out.

So before I'd put a number on anything, I needed answers: Is the outdoor-storage use by-right, conditional, or legal non-conforming? Is there a comprehensive-plan update or rezoning effort underway that threatens it? What is this municipality's posture toward IOS generally?

On this deal, the use was non-conforming. Which means I wasn't buying stabilized income at all — I was buying a regulatory position with an expiration risk attached to it. That's not automatically a "no." But it is a fundamentally different deal that has to be priced for the real possibility that the use evaporates. A cap rate quoted on income you might lose the right to produce isn't a cap rate. It's a guess wearing a decimal point.

The IOS-specific costs the cap rate ignored

A few more things the per-SF, cap-rate framing buried — all of them real capital:

Yard capex and reserves. The surface is the asset, and it wears out. Gravel re-grading, drainage, fencing, lighting, security — that's recurring capital the broker NOI ignored entirely. Underwriting yard income before reserving for the yard overstates the yield, the same way it does on any asset. The true cap rate sat below the broker's headline once I put real numbers on it.

Environmental. A lot that's stored trucks, equipment, or materials is a contamination candidate. Phase I at minimum, possibly Phase II. A surprise here can dwarf everything else in the deal, and it's the one risk you cannot negotiate your way out of after closing.

Functionality. Truck turning radius, ingress and egress, utilities, and whether the layout actually works for the tenant's operation. A yard that can't maneuver a 53-foot trailer is worth less than its acreage implies, no matter what the per-acre comp says.

Two ways the deal works

Path A — price it as the covered-land play it is. Pay a land-yield-justified number where the in-place rent covers carry and you underwrite the optionality conservatively, with the zoning risk discounted into the basis. If the higher-and-better use materializes, you win big; if it doesn't, the rent still carries you while you hold.

Path B — underwrite it as durable income, but only after the zoning is fixed. That means the use made conforming or by-right (or a credible, costed path to it), plus a tenant with real term and credit, reserves for the yard, and a clean environmental. Absent those, the "stabilized" cap rate is fiction and Path B doesn't exist yet.

What you can't do is pay a Path-B income price for a Path-A optionality asset with non-conforming zoning. That's the deal as it arrives.

The decision

The covered-land thesis here was real, and the location had a credible long-term redevelopment story. But the non-conforming zoning meant the income was nowhere near as stable as the cap rate implied, and the entitlement path to protect or upgrade the use was uncertain. So I priced it as optionality, not income — a number well below a stabilized-cap valuation — because that's what it actually was. Underwriting discipline on IOS is refusing to pay an income price for what is, underneath the gravel, a land-and-entitlement bet.

The takeaway

IOS is a land and entitlement asset wearing an income costume. Underwrite rent per usable acre and land yield, not a per-SF cap rate. Decide honestly whether you're looking at stabilized income or a covered-land play, because they price completely differently. And before anything else, verify the use is legal and durable — by-right beats conditional beats non-conforming, and a hostile municipality can erase your value with a single vote. Then reserve for the yard, check the environmental, and confirm the site physically functions for the use.

Run the same checks yourself: the IOS land yield calculator for rent per acre and value at a target cap, the cap rate calculator to sanity-check broker versus true, and the full IOS underwriting guide for the step-by-step. When you want the complete model — land-based rent, two-NOI NNN treatment, covered-land optionality, broker vs true cap — UpsideIQ is the only underwriting tool that actually models IOS natively.

Written by Michael Laudino, founder of LFO Capital LLC, who underwrites industrial, IOS, and multifamily acquisitions across the Southeast. UpsideIQ is LFO Capital's institutional-grade underwriting platform. This article is for informational purposes only and is not investment advice.