Industrial Infill Viability Framework for Secondary Cities
Small infill industrial is supply-constrained by geometry rather than by policy. Seven physical tests that decide whether a building is leasable, and to whom.
The institutional industrial story is about large distribution boxes near interstates. That is not the opportunity available to a small investor in a secondary metro.
The one that is: small infill industrial — 5,000 to 50,000 square feet, older, inside the built-up area, leased to trades contractors, small manufacturers, service businesses, equipment distributors and local logistics operators. It is supply-constrained for a durable reason, and it is decided almost entirely by physical characteristics that a spreadsheet does not capture.
Why the supply constraint is real
New industrial gets built where land is cheap and parcels are large, which means the edge of the metro. Infill parcels inside the built-up area are small, often awkwardly shaped, sometimes contaminated, and frequently zoned for something else now.
The result is that infill industrial supply is constrained by geometry rather than by policy, which makes it more durable than a zoning-based constraint that a council can change. Meanwhile the tenants who need to be inside the metro — a plumbing contractor serving the city, a last-mile operator, a business whose customers visit — cannot use a box thirty minutes out.
That mismatch is the whole investment case. It is also why a building's physical attributes decide more here than in any other class.
The seven physical tests
Applied in order. A failure on the first two is usually fatal; the rest are pricing.
1. Clear height
The single most consequential dimension. Under about 16 feet the building is limited to service and trades uses. Between 16 and 24 feet it works for light manufacturing and distribution to small operators. Above 24 feet it competes for more tenant types.
You cannot change it. Everything else on this list is easier to fix.
2. Truck access and yard
Can a truck get in, turn, and dock or load? Specifically: turning radius, apron depth, and whether there is any yard for staging or parking.
Infill sites fail this often, because they were built when vehicles were smaller. A building with excellent bones and no truck turning circle is a building with a much shorter tenant list.
Yard is frequently the scarcest asset. For contractors and equipment operators, secure outdoor storage is sometimes worth more per square foot than the building.
3. Loading configuration
Dock-high doors, grade-level doors, or both. Grade-level suits trades and service tenants; dock-high suits distribution. Having both widens your tenant pool considerably, and adding a dock later is expensive and sometimes impossible on a constrained site.
4. Power
Amperage and service type. A small manufacturer or a tenant with equipment needs three-phase power at adequate amperage. Upgrading service on an infill site can involve the utility, the street and a long timeline.
Check the panel during diligence. This is a common and expensive surprise.
5. Column spacing and floor
Wide column spacing gives usable space; tight spacing limits racking and equipment layout. Floor slab thickness and condition determine what loads the building can carry, and a slab that cannot take a forklift or heavy equipment eliminates a tenant category.
6. Office finish ratio
Most small industrial tenants want 10–20% office. Substantially more than that is wasted space they will not pay for; substantially less means a fit-out cost to attract them.
7. Zoning and legal conformity
Confirm current zoning permits the actual use, and whether the building is legally conforming. Many older infill industrial buildings are non-conforming under current zoning — which affects rebuilding rights after a loss, insurance, and financing.
The environmental question you cannot skip
Older industrial sites carry contamination risk from prior uses — solvents, fuel storage, plating, dry cleaning. This is the risk that distinguishes industrial diligence from every other small commercial class.
Get a Phase I environmental site assessment. Always. If it recommends a Phase II, get that too, and understand that lenders will require both and that a finding can end the deal or reprice it substantially.
Do not treat this as a formality. It is the one diligence item where the downside is unbounded.
The tenant base, and its risk
Your tenants will mostly be small local businesses: contractors, distributors, fabricators, service operators. That produces a specific risk profile.
Credit is thin. These are small companies without ratings, often without audited financials. Ask for tax returns, bank statements and trade references, and secure a personal guarantee where you can.
They are sticky when the building fits. A tenant who has installed equipment, run power and set up a shop does not move easily. Fit-out investment is the best retention mechanism in commercial real estate.
Demand tracks local business formation and construction activity. Check construction and trade employment in the county via BLS QCEW — it is a direct read on your tenant base.
Concentration matters. In a small building, one tenant may be most of your income. Treat that as the red flag it is.
What makes it work financially
Low capital intensity. Compared to multifamily, an industrial building has very little to maintain — a roof, a slab, doors, HVAC in the office portion. No unit turns, no appliances, no interior finishes cycling every few years.
Triple-net or modified gross leases push operating costs to the tenant, which insulates you from the expense drift that erodes multifamily NOI.
Multi-year leases with fixed escalations, which is stable income and slow repricing — check the trade-off in which asset class handles volatile debt best.
Where it fails the screens
Be clear-eyed. Against the four screens:
- Financing: adequate but narrower than multifamily, mostly local and regional banks.
- Management: thinner. Fewer third-party commercial managers in small markets, though the management burden itself is low.
- Supply: passes strongly. This is the reason to be here.
- Liquidity: moderate. Fewer buyers than multifamily, more than small office.
What to do next
- Screen the class first: asset class selection in emerging submarkets.
- Look for pricing gaps: 11 asset class mispricing patterns in secondary cities.
- Run diligence: due diligence workflow from LOI to close.
- Confirm financing exists: debt availability tracker by secondary market type.
Sources
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