West Bloomfield Checks the Septic Tank Before Closing. Most of Southeast Michigan Doesn't.
September 3, 2026
September 3, 2026
What happens when a West Bloomfield seller lists a lake home, accepts an offer, opens escrow, and learns three weeks before closing that nothing moves forward until someone pumps and inspects a septic tank they'd forgotten was even down there?
It happens more often than sellers expect, because West Bloomfield Township enforces something most of Metro Detroit doesn't: a mandatory septic inspection at the time of sale. If your last transaction was in Commerce Township you already know the drill. If it was in Wayne County, Macomb County, or almost anywhere else in the region, this requirement simply didn't exist on your closing checklist, and there's no reason you'd have thought to ask about it here.
Michigan is the only state with no statewide sanitary code. Instead, 45 separate local health departments write and enforce their own rules for septic systems across the state's 83 counties, which means the requirements in one township can look nothing like the requirements two exits down the freeway. West Bloomfield is one of the communities that adopted a Time of Sale program. That single fact changes the shape of a listing timeline for anyone whose home still runs on an on-site septic system.
Septic inspection companies that work across Southeast Michigan describe West Bloomfield and Commerce Township the same way: an inspection is required before a property in either community can be sold or transferred. Washtenaw County runs a similar Time of Sale program countywide. Wayne County and Macomb County, by contrast, have no mandatory inspection at sale at all.
| Community | Septic inspection required at sale? |
|---|---|
| West Bloomfield Township | Yes, Time of Sale ordinance |
| Commerce Township | Yes, Time of Sale ordinance |
| Washtenaw County | Yes, countywide Time of Sale program |
| Wayne County | No mandatory inspection at sale |
| Macomb County | No mandatory inspection at sale |
That patchwork is the whole story. A buyer relocating from Wayne County has genuinely never seen this step before. A seller who bought their West Bloomfield home from someone who also owned it in Wayne County may not have seen it either, since Michigan's disclosure and inspection rules follow the property's township, not the parties involved.
West Bloomfield didn't pick this rule out of nowhere. The township holds roughly two dozen lakes, and water research from Michigan State University Extension explains why lake-dense communities gravitate toward Time of Sale ordinances in the first place: groundwater near a waterfront septic field can reach surface water in under a year, and the speed depends heavily on soil type. Sandy soil moves groundwater fast. A failing tank or drain field on a lake lot isn't just a plumbing problem, it's a water quality problem for the lake itself, and township officials weighing an ordinance are weighing the lake's long-term health along with individual property values.
That rationale doesn't mean every lake property in West Bloomfield is sitting on an aging septic field. A fair number of the township's lake homes have been converted to municipal water and sewer over the years, unlike some neighboring lake communities where septic and well systems still dominate. What that leaves is an uneven map within the township itself: newer construction and many redeveloped lakefront parcels tie into the sanitary sewer, while a meaningful share of the smaller, older cottages that remain on lakes like Green Lake, a roughly 100-acre private, non-motorized lake still working through its own transition from cottage community to custom-built homes, are exactly the properties where a septic system, and this ordinance, still applies.
If you don't already know whether your home connects to the township's sanitary sewer main or runs on an on-site system, that's the first question worth answering, well before a buyer's inspection period puts a clock on the answer.
A Time of Sale evaluation isn't a quick glance at a lid in the yard. A typical inspection includes:
Concrete tanks installed at shallow depths are particularly vulnerable to freeze-thaw cracking in Michigan winters, which is one of the more common findings inspectors flag during these evaluations.
Even setting the Time of Sale ordinance aside, Michigan's Seller Disclosure Statement already asks direct questions about any on-site septic system: whether one exists, its approximate age, and the last date the tank was pumped. Giving inaccurate answers on that form can expose a seller to liability well after closing has happened. In West Bloomfield, the inspection and the disclosure form end up reinforcing each other. There's little room for a seller to describe a system as fine on paper if a licensed inspector just documented otherwise.
Statewide, more than one in five of Michigan's estimated 1.3 million septic systems is currently failing, according to figures from the state's Department of Environment, Great Lakes, and Energy. That base rate is exactly why the stakes of this inspection are real rather than theoretical.
If a West Bloomfield evaluation turns up a failing system, the typical path forward under a Time of Transfer ordinance is either repairing the system before the transfer completes or negotiating an escrow arrangement to fund repairs after closing. Evaluations themselves across Michigan generally run in the $300 to $600 range. A full replacement is a different order of expense entirely: conventional systems typically run $7,000 to $15,000 to install, while engineered or mound systems needed for more difficult soil conditions can run $15,000 to $25,000 or more. That's the gap between a minor delay and a serious renegotiation of price, timeline, or both, and it's exactly why sellers benefit from scheduling this evaluation before a buyer's clock starts running, not after.
There's a legislative wrinkle worth watching if you're planning a sale further out. Senate Bill 771 would establish statewide septic evaluation requirements tied to a system's age and its proximity to water, rather than tied to when a property changes hands. It advanced out of Senate committee in June 2026 and is still awaiting floor action, so it is not law as of this writing. If it eventually passes, it wouldn't replace township-level Time of Sale ordinances like West Bloomfield's directly, but it would mean a much larger share of Michigan's septic systems have been evaluated at some point regardless of whether the home is being sold, which changes the baseline of what buyers can expect to already know about a system before they even make an offer.
If your West Bloomfield home sits on an on-site septic system, the practical move is to treat the Time of Sale evaluation the same way you'd treat staging or professional photography: something scheduled ahead of the listing, not reacted to after an offer arrives. Soil evaluations and septic inspections tend to book up during Michigan's busy spring and summer season, and lab results for dye or load tests typically take a few business days once samples are submitted. Building that lead time into your pre-listing plan means a failing system becomes a repair conversation on your terms, not a renegotiation forced by someone else's calendar.
My West Bloomfield home has municipal sewer. Does this apply to me? No. The Time of Sale requirement is tied to properties served by an on-site septic system. If your home connects to the township's sanitary sewer main, this specific step isn't part of your closing, though the standard Seller Disclosure Statement still applies.
Who typically pays for the inspection? In most Michigan communities with these ordinances, the seller covers the cost, though the purchase agreement can always negotiate that responsibility between the parties.
What if the system is old but still passes? A system that passes the pump, dye test, and drain field assessment can generally move forward with the sale as is. Its age and last pump date still need to be disclosed accurately on the Seller Disclosure Statement, regardless of whether it passed.
How far ahead of listing should I schedule this? As early as possible. Scheduling and lab turnaround can add days or weeks during peak season, and knowing the result before you accept an offer gives you far more control over price and terms than finding out during someone else's due diligence period.
A septic evaluation isn't a glamorous line item on a listing checklist, but in a township built around two dozen lakes, it's one of the details that separates a closing that goes smoothly from one that stalls in its final weeks. If you're weighing a sale in West Bloomfield and want a clear-eyed read on what your specific property, lake-adjacent or not, will need before it hits the market, Jessica Stencel can walk through it with you. Request a free home valuation to start that conversation.
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