A buyer we worked with last spring had already mentally moved into a shingle-and-stone cottage two blocks off Little Traverse Bay. The offer was accepted. The home inspection came back clean. Then the septic evaluation from the Health Department of Northwest Michigan landed in her inbox with one word that stopped her cold: undersized.
She called convinced the deal was dead. It wasn't. The system was original to a home built in the late 1930s and expanded twice since, and what she read as a failing grade was actually the routine finding on nearly any century-old property in this part of Emmet County. Knowing the difference between undersized and failed is the single most useful thing a buyer or seller of an older Petoskey home can understand before they get to the closing table.
The Evaluation Doesn't Pass or Fail Anything
The Health Department of Northwest Michigan covers Antrim, Charlevoix, Emmet, and Otsego counties, with an office serving the Harbor Springs and Petoskey area. When a property here changes hands, a sanitarian from that department typically performs what's called a Time-of-Transfer evaluation on the well and septic system. It's easy to assume this works like a home inspection: you pass, or you fail, or you negotiate repairs.
That's not how the department actually frames it. The evaluation identifies the current and future use of the property and the current status of each system. It does not pass or fail the well or the septic. A well only gets flagged as unsafe if it tests positive for coliform bacteria or E. coli, and even then the fix is chlorination and a retest, not condemnation. A septic system is only considered failed if there's visible evidence of sewage on the ground during the inspection itself.
Everything else, including a system that's technically undersized for the home it now serves, falls into a different category entirely. In many cases the existing septic system was sized for a smaller footprint decades ago, before an addition or a converted attic bumped up the bedroom count. That mismatch gets noted. It doesn't trigger a mandatory upgrade unless you're proposing changes to the home or the system eventually needs full replacement, at which point it has to meet the current District Sanitary Code.
The department's own guidance is direct on this point: an undersized system, on its own, is not the same finding as a failed one.
What the Report Actually Means, Line by Line
| What buyers often assume | What the evaluation actually says |
|---|---|
| "Undersized" means the deal is off | It's a routine notation on many older homes, not a failing grade |
| A flagged well is permanently unsafe | A positive bacteria test just requires chlorination and a retest |
| The seller has to replace the system now | Replacement is only required if you're renovating, adding capacity, or the system fails outright |
| Every county in Michigan handles this the same way | Michigan has no statewide sanitary code. Counties and townships each set their own rules |
That last point matters more than it sounds. Michigan is the only state without a uniform sanitary code, which means the Time-of-Transfer process you'll go through on a Bay View cottage is a local health department decision, not a state mandate. It's why the same "undersized" finding gets treated so differently depending on where you're buying.
Why This Comes Up So Often in Petoskey's Older Neighborhoods
Downtown Petoskey earned its Gaslight District name from the actual gas lights that once lined its streets, and the housing stock around it, along with the cottages in the historic Bay View community, predates most of the plumbing and electrical codes buyers assume are universal. That history shows up in predictable ways.
Foundation settling is common in homes built before 1950 on the sandy soil of the original settlement. Most of that movement happened decades ago and has long since stabilized, but it still shows up on an inspection report and unsettles buyers who don't know the local pattern. Knob-and-tube wiring is still present in a meaningful share of these properties and typically needs updating before an insurer will write a policy. Original steam radiator systems are common too, and they usually still work well, though they often need modern controls to run efficiently.
The architecture compounds the plumbing and electrical issues. The steep, Alpine-influenced rooflines that define the historic district look sharp in photos, but they're also where ice dams form most easily, which means attic insulation and ventilation deserve more attention here than in a newer build. Emmet and Charlevoix counties both sit in EPA Zone 2 for radon, a moderate-risk designation worth testing for regardless of a home's age. And along the water, humidity in older basements can lead to mold that a quick walkthrough won't catch. Properties in Bay Harbor carry their own drainage considerations tied to that development's grading.
None of this means the older Petoskey housing stock is a liability. It means the inspection and evaluation process for these homes surfaces more line items than it would for a home built in 2015, and most of those line items are manageable once you know what they actually require.
The Disclosure Form Only Covers What the Seller Actually Knows
Michigan's Seller Disclosure Act requires sellers of most residential property to complete a written statement before the buyer signs a purchase agreement, or within 72 hours after the offer is accepted. If a seller never provides it, the buyer can walk away from an otherwise binding contract. If new information in the disclosure changes the buyer's mind, they get 72 hours to terminate after receiving it.
The form asks specific questions about the septic system: its approximate age, the last date it was pumped, and whether it's had any known failures or repairs. It asks the same kind of detail about the well. Sellers who don't have records aren't required to guess. They're allowed to mark the answer as unknown, and that's a legally sound answer as long as it's honest.
Selling a home "as-is" doesn't change any of this. Michigan courts have confirmed that an as-is clause shifts the risk of unknown defects to the buyer but does not excuse a seller from disclosing something they actually know about. A Michigan Court of Appeals case, Pilcher v. Benoit, turned on exactly this question after a buyer discovered a faulty septic tank cover the seller hadn't disclosed. A former tenant's testimony suggested the seller knew about the condition, and the court found that raised a real question of fact about whether the seller had committed silent fraud by staying quiet on the form. The lesson isn't that septic issues are common grounds for lawsuits. It's that what a seller actually knew, and chose to write down or leave off, is the entire legal question.
Agents aren't on the hook for the accuracy of what a seller writes on that form. Under Michigan law, an agent is only liable for a disclosure problem if they knowingly participated in it. Their job is making sure the form gets completed and delivered, not verifying every answer on it.
What This Means If You're Under Contract Right Now
If you're buying an older home in Petoskey, order the Time-of-Transfer evaluation early in your due diligence period rather than waiting until the final week before closing. Ask the seller directly for pump records and installation dates instead of treating an "unknown" answer on the disclosure form as a warning sign. And if your plans for the property include an addition, a converted bedroom, or a new bathroom, budget for a septic upgrade regardless of what today's evaluation shows, since any change in how the home is used reopens the compliance question.
If you're selling, the same logic runs in reverse. Pull whatever pumping and repair records you have before you list, and if you genuinely don't have them, say so on the form rather than guessing at a date you can't confirm. A documented "unknown" holds up. A confident wrong answer doesn't.
A Few Questions Worth Asking Before You Close
Does an undersized septic system have to be replaced before I can close on a Petoskey home? No. The Time-of-Transfer evaluation notes it as a finding, but a system only has to be brought up to current code if you're proposing changes to the home's use or the system needs full replacement anyway.
Does selling "as-is" protect me if I don't disclose a known septic problem? No. An as-is clause shifts the risk of defects you didn't know about. It does not excuse you from disclosing something you did know about, and Michigan courts have ruled on exactly this distinction.
Who actually performs the well and septic evaluation in Emmet County? A sanitarian from the Health Department of Northwest Michigan, which covers Emmet, Charlevoix, Antrim, and Otsego counties and maintains an office serving the Harbor Springs and Petoskey area.
Older homes carry more paperwork than newer ones, not more risk. The buyers and sellers who move through a Petoskey closing without a scare are the ones who read the report correctly the first time. If you're weighing a purchase or a sale in one of these neighborhoods and want someone to walk through what a specific evaluation or disclosure actually means for your situation, The Crane Group is glad to schedule a free consultation and talk through it.
