Light industrial is an eligible property type in our Small Balance Commercial program. Heavy or "dirty" manufacturing is not — it sits on the ineligible list, and unlike several other ineligible types it carries no carve-out that lets it in as a minority tenant.
The line between the two is not drawn by what your business calls itself. It is drawn by a five-part definition in Appendix A of our guidelines, and the part that disqualifies the most buildings is not the one anybody expects.
This page walks the actual test, element by element, and shows what pushes a use across the line: the process running inside, the equipment bolted to the floor, the build-out, and the site's history.
The two lists, and why the wording matters
Our eligible property type list includes, under Tier II:
> Light Industrial (No heavy/dirty manufacturing) – please see Appendix A for definition
Our ineligible property type list includes:
> Industrial (Heavy/dirty manufacturing)
Two things are worth noticing in that pairing.
First, the eligible entry does not stand on its own. It points at Appendix A — unusual, since most entries on the eligible list are self-describing. Treat the Appendix A text as the rule and the list entry as a heading.
Second, our ineligible list marks certain types with an asterisk. Asterisked ineligible types are allowed as third-party tenants in a Tier II property when the income they generate is 25% or less of total property cash flow. Adult entertainment, churches and religious organizations, education, gambling, and gun ranges all carry the asterisk.
Industrial (Heavy/dirty manufacturing) does not.
That matters. A multi-tenant flex building where four of five bays are storage and light assembly and the fifth is genuine heavy manufacturing is not rescued by the small size of the fifth tenant's rent.
The Appendix A definition, in full
Here is the operative text. Read it slowly — every clause does work.
Broken into its elements:
| Element | The test as written | What it screens for |
|---|---|---|
| Size | Small size facility, under 25,000 square feet | Building scale and re-tenanting depth |
| Process | No heavy manufacturing and no specialized industrial process | What actually happens inside |
| Office ratio | Office space ranges from 3% to 25% of total area | Whether the building is built for people or purely for machines |
| Personnel fit-out | Sufficient plumbing, lighting, and fenestration to accommodate personnel | Habitability of the space as a workplace |
| Absence clause | No heavy machinery, welding operations, cranes, or hazardous materials | Specialised equipment and contamination risk |
The absence clause is the one that surprises people, and it is written as a separate requirement from the "no heavy manufacturing" clause. A building does not have to host heavy manufacturing to fail. It only has to contain heavy machinery, welding operations, cranes, or hazardous materials.
Where the size element actually bites
There are two separate size rules, written in two places using two different measures. Both need to clear.
The first is inside the Appendix A definition: a small size facility, under 25,000 square feet. The second sits in the program parameters, under a heading called Special Purpose:
> Single User Office/Automotive/Warehouse/Retail/Light Industrial with ≥25,000 SF of GBA. Multi-tenant properties may exceed 25,000 SF; however, no individual tenant may occupy with ≥25,000 SF of GBA
That second sentence — the multi-tenant allowance — was added on 7/10/2026 and is one of the more consequential recent changes for industrial borrowers. A 40,000 square foot multi-tenant flex building is not automatically out. What is out is any single user, and any individual tenant, at or above 25,000 SF of gross building area.
The direction of both rules is the same at the boundary. "Under 25,000 square feet" excludes 25,000; "≥25,000 SF of GBA" captures it as special purpose. A building at exactly 25,000 square feet is on the wrong side of both.
The office ratio is how light industrial separates from warehouse
Both light industrial and warehouse are eligible Tier II types, so the distinction rarely turns a yes into a no. But it drives how your building is classified, and classification drives comparable selection in the appraisal.
Our Appendix A warehouse definition describes buildings designed primarily for storage, with office space typically 3% to 12% of total area, plumbing, lighting and fenestration usually limited due to anticipated light personnel load, and a light frame with large open interior areas. Cold storage and truck terminals fall here.
Light industrial doubles the top of that office range — 3% to 25% — and requires enough plumbing, lighting and fenestration to accommodate personnel. A warehouse is built for goods; a light industrial building is built for people working on goods.
If your building is 30% office, neither definition describes it on its face. That is not automatically disqualifying, but it is worth flagging early rather than letting the appraiser's classification set the frame.
What pushes a use across the line
Four vectors move a property from light industrial toward ineligible. They are independent — you can fail on one while passing the other three.
1. Process
The definition names two disqualifiers: heavy manufacturing, and specialized industrial process. The second is broader, and our guidelines do not define it further. The illustrative eligible uses given — cabinet making, assembly processes, home service industries — are all subtractive or assembly work with general-purpose tools.
The pattern is not about how big the business is. It is about whether the operation transforms raw material through a dedicated process line. Assembling purchased components is named as eligible. Running a process that requires the building to be configured around it is what the definition screens out.
2. Equipment
Heavy machinery, welding operations and cranes are named individually. Cranes are worth separating from machinery: a bridge crane is a structural feature of the building, not tenant equipment. It survives the tenant leaving, which is exactly why it reads as a marketability constraint rather than an operations detail.
3. Hazardous materials and contamination risk
The Appendix A definition ends by naming hazardous materials as absent from light industrial properties. Note what this clause is: a property-type eligibility test sitting inside the definition alongside the equipment items. It is separate from, and earlier than, the environmental review below.
Our guidelines do not use the word "emissions" in the property-type provisions and set no air-quality, discharge or permitting thresholds. Those are municipal and state questions — for your environmental attorney and the permitting authority, not a lender's guideline. Our text proxies the whole category through two mechanisms: the hazardous-materials clause, and the environmental screen run on every file.
4. Specialised build-out
This is the vector that catches otherwise ordinary businesses, and it operates through the special use and special purpose provisions rather than through the industrial definitions at all.
That under-90-days conversion test is the practical one to run on your own building: if the current operator vanished tomorrow, what would it cost and how long would it take to make this a plain warehouse, retail or office space?
Food production is a useful worked case. It is not named anywhere in our eligible or ineligible lists. Assembly-style packing and light preparation reads toward the light industrial definition. But a facility built around floor drains throughout, sloped and sealed flooring, walk-in cooler and freezer boxes, grease interception, stainless wall panel systems and a sanitation boiler is a building configured around one process — and the answer to "can this be a warehouse inside 90 days" is often no.
How environmental review interacts with all of this
Property-type eligibility and environmental review are two different gates, run in order, and industrial borrowers conflate them.
The property-type test is a document test: it reads your use, size, office ratio and equipment against Appendix A, and can be answered on day one with no third-party report. The environmental review is a site test, and it runs on every file we originate — not just industrial ones.
Three points where this bears on the light-versus-heavy question specifically.
Historical use is in scope, and nobody checks it. The provision names the property's current and historical uses. A clean assembly operation in a 1968 building can inherit an environmental problem from a plating shop, a printer, a dry cleaner or a fuel operation that occupied the same slab forty years ago. That history sits in the database searches whether or not you know about it.
The output standard is narrow. Reports must indicate low risk, or no further action. A report that identifies a recognized condition and recommends further work has not met the bar.
Environmental review does not rehabilitate an ineligible use. If the operation falls outside the Appendix A definition — welding, cranes, heavy machinery, a specialized process — a clean environmental report does not fix it. The gates are sequential and property type comes first. The reverse holds too: passing the property-type test tells you nothing about what the database searches will surface.
For when a full Phase I comes into play as against the standard screen, see our page on [when a Phase I environmental report is required](/blog/when-is-a-phase-1-environmental-report-required-for-a-commercial-loan). This page does not duplicate those triggers.
The adjacent rules that catch industrial owner-operators
Clearing the light industrial definition puts you into the program, not into approval. A handful of other provisions hit this borrower profile disproportionately.
Zoning. The property must be commercially zoned, and industrial zoning is named as acceptable. Residential or agricultural zoning is prohibited. Legal and legal non-conforming uses are acceptable; illegal uses are not. We will not lend on a property subject to a zoning change. Where an area has no zoning, compliance is met if the appraiser states the property is compatible with the market area.
Legal non-conforming status has an insurance consequence. Law and ordinance coverage — a combination of Coverage A, B and C — may be required as we determine, and that requirement applies only where the property is zoned legal non-conforming. Older industrial buildings in rezoned districts are the classic case.
Commercial uses in a residential zoning district. Properties with commercial uses located within a residential zoning district and operating under a special use permit, or as defined by the municipality, are eligible for a maximum LTV of 50%. All other restrictions still apply. This is the shop-behind-the-house situation, and the leverage haircut is severe.
Rural. Properties that meet MSA requirements but are deemed rural by the appraiser are subject to a maximum LTV of 60%. Industrial buildings are more likely than most types to sit at the edge of a metro.
Those are maximums. The 80% figure applies to purchases with a FICO of 725 or above, and the applicable maximum for each property type, tier and credit program is set in our current pricing matrix.
Owner-occupancy. To qualify as owner occupied you must use 50% or more of the property's net rentable area. Below that, underwriting may classify the property as an investment property, which changes the method from global debt service coverage to property DSCR.
Business experience. For a standard owner-occupied business, less than three years is classified as inexperienced and caps LTV at 70%; three years or more reaches the program maximum. Experience is measured on ownership, operational or employment experience in the same business or industry immediately preceding the loan application — so a shop foreman of fifteen years who bought the business last year is not automatically inexperienced.
Core parameters. Owner-occupied loans run $100K to $2.5MM, minimum FICO 650, minimum global debt service coverage 1.20x, 75% occupancy over a 90-day trailing period.
Reading your own building before you spend money
Run the four elements in this order, because they cost nothing and they resolve most files.
1. Measure. Under 25,000 square feet? If larger, is it genuinely multi-tenant with no single tenant at or above 25,000 SF of GBA?
2. Walk the floor. A crane, a gantry, a welding bay, machinery that would need rigging to remove? Drums, tanks or a flammables cabinet?
3. Estimate the office share. Under 3% or over 25% and the building does not match the definition as written.
4. Run the 90-day test. Strip the tenant out mentally. Plain warehouse, retail or office space at limited cost inside 90 days — or a purpose-built facility?
If all four clear, you are in ordinary Tier II territory. If one does not, that is the conversation to have before an appraisal is ordered — and appraisals must be ordered through an approved appraisal management company, not by you or your broker directly, so a report you commission yourself will not carry the file.
What this page does not do
This page is not an approval, a quote, a rate, or a commitment to lend. Reading your building as light industrial does not mean the loan is approved — property-type eligibility is the first gate, not the last.
It does not price the loan. Maximum LTVs for each property type, tier and credit program come from our current pricing matrix; the figures here are program ceilings, not your figure.
It does not cover the Phase I trigger question, which is handled in full on the environmental page linked above, and it does not attempt the full ineligible-property-type list, which is covered on [what property types commercial lenders will not finance](/blog/what-property-types-commercial-lenders-will-not-finance).
It does not answer zoning, permitting, environmental-law or tax questions. Whether your welding bay is a permitted use, whether your discharge permit is current, and your exposure on a legacy contamination question are matters for your municipality, your environmental attorney and your accountant. We can tell you how a fact pattern reads against our guidelines; not what your jurisdiction will do.
It does not cover the value treatment of your equipment, which our guidelines do not address for light industrial, or the specifics of appraisal comparable selection for industrial properties. And it does not address anything downstream of eligibility: document requirements, global debt service coverage calculation, entity structure, title and lien position, or closing. Those are separate gates with their own rules.
Guideline SBC 08/03/2026 · Reviewed August 31, 2026
Published August 31, 2026 · Updated August 31, 2026
How to use this guide
This article is educational guidance, not an offer or commitment to lend. Rules, property facts, credit, leverage, documentation, and full underwriting still control any actual scenario.