A “Buildable” Lot Up North Isn’t Buildable Until a Sanitarian Digs a Hole. Here’s the Perc Test Nobody Explains.

The word “buildable” does a lot of quiet lying on land listings up here. It sits there in the description next to “wooded” and “end of a private road” and “minutes from the lake,” and buyers read it as a promise. It isn’t one.

Whether you can actually put a house on a piece of raw ground in Grand Traverse, Leelanau, or Benzie County usually comes down to one afternoon, one county sanitarian, and one hole dug in your dirt with a backhoe. That’s the perc test, and almost nobody explains it before you’re already emotionally attached to the parcel.

“Buildable” Is a Legal Term, Not a Sales Pitch

Here’s the part that trips people up: under Michigan’s Land Division Act, a parcel is only “buildable” if it contains enough usable area outside of wetlands, floodplains, and other no-build zones. A seller can honestly call a lot buildable because it met that bar when it was split off years ago.

That legal definition says nothing about whether the soil will pass a septic evaluation today. It says nothing about whether you can get a well far enough from that septic field. And it says nothing about whether the driveway you’re picturing is even legal to build.

So the listing isn’t necessarily wrong. It’s just answering a different question than the one you actually care about, which is: can I close on this and build the house I came here to build?

The Perc Test Is the Real Gatekeeper

Out here, most homesites aren’t on municipal sewer. They run on a well and a septic system, which means the county health department, not the township, quietly holds veto power over your dream.

In Leelanau and Benzie, that’s the Benzie-Leelanau District Health Department’s Site Survey and Vacant Land Evaluation program. In Grand Traverse County it’s the health department’s on-site sewage program. You file an application, pay the fee, and a sanitarian comes out with a shovel or a backhoe and reads the ground.

They’re checking soil type, how fast water drains, where the groundwater sits, and how close you are to surface water. That last one matters a lot up north, where half the good lots are good precisely because they’re near water.

If the soil drains well, you get a conventional septic system and a happy budget. If it’s heavy clay or the water table is high, you’re looking at an engineered mound system that can run tens of thousands more, or a “sorry, not here” that no amount of money fixes.

Run It Before You Close, Not After

This is the whole ballgame, so I’ll say it plainly: the perc test is due-diligence work, and you want it done during your inspection window, not after you own the land.

We see this pattern a lot in our market. Someone falls for five wooded acres, waives too much to win it in a competitive summer, and only finds out in the fall that the buildable footprint is a soggy back corner nowhere near the view they paid for. Land doesn’t have a home inspector waving a flashlight in the crawlspace. The perc test is the closest thing raw ground has to one.

A vacant-land purchase agreement can be written with a soil-evaluation contingency, the same way a home offer leans on financing and inspection contingencies. Use it. If a seller won’t give you time to test the dirt, that tells you something too.

The County You’re In Changes the Rules

Northern Michigan is not one market with one rulebook, and land buyers learn this the hard way.

Leelanau County has a point-of-sale ordinance: to transfer an existing home, the septic has to have been evaluated within 36 months and the water tested within 6 months. That’s for homes, but it tells you how seriously the county treats what’s underground, and it shapes how raw land trades too.

Grand Traverse handles its site evaluations through its own health department, and rules on well setbacks, driveway permits, and minimum lot widths vary township to township. A parcel near Cedar and a parcel near Lake Leelanau can play by noticeably different books. Never assume the last county’s answer is this county’s answer.

The 2026 Wrinkle Almost Nobody’s Talking About

If you’ve been eyeing a bigger tract with an eye toward splitting off a lot, the ground literally just shifted under you. In December 2025, Michigan amended the Land Division Act through Public Act 58, and the changes started rolling out March 24, 2026, with full implementation set for March 2027.

The short version: on parent parcels of 10 acres or more, the new law allows additional divisions for every additional 10 acres beyond the first 10. That’s more flexibility to carve a homesite or a gift-to-the-kids lot out of acreage than the old formula allowed.

It’s genuinely useful, and it’s also exactly the kind of change that gets misquoted at barbecues all summer. Every parcel still has to hit township width and frontage minimums, and every new lot still has to perc. More splits on paper doesn’t mean more buildable dirt in reality.

The Driveway You Can’t Build

One more that catches people: access. Every buildable parcel needs legal frontage on a road or a recorded easement to get to one. “You can just cut a two-track back to the ridge” is not a plan a township will stamp.

Up here, plenty of gorgeous back lots touch a road only through a shared easement, and the terms of that easement decide whether you can widen it, plow it, or run utilities down it. Over the past 25 years, Janel has watched more than one “perfect” lot die on the access question, not the soil question. Working in this area, you learn to read the easement before you read the view.

Three Questions Before You Write the Offer on Raw Land

When we walk buyers through vacant land up north, it comes down to three things, in this order.

One: Will it perc? Get a site evaluation from the county health department in your contingency window. Everything else is downstream of the dirt.

Two: Can you legally, physically get to it? Confirm road frontage or a recorded easement that actually lets you build a driveway and run utilities.

Three: What does the township allow? Setbacks, minimum widths, well-to-septic distances, and any greenbelt or zoning overlay that shrinks your usable footprint.

Answer those three honestly and you’ll never overpay for a lot that can’t hold a house. Skip them, and “buildable” becomes the most expensive word on the listing.

The Bottom Line

Buying vacant land up north is one of the best moves there is if you go in clear-eyed. At an average of roughly $42,000 an acre across Leelanau County right now, and with real buyers competing for the good tracts, the ground is not cheap and the mistakes aren’t either.

The good news is that the perc test, the access check, and a call to the township turn most of the guesswork into homework. That’s the boring, unglamorous work that separates a great buildable lot from a pretty photo of a swamp.

If you’re weighing a piece of land anywhere from Cedar to Elk Rapids to the Benzie shoreline and want a second set of eyes before you fall in love, that’s exactly the kind of thing we do. Send me the listing and let’s read the dirt together before you write the offer.

Taylor Brown, Realtor

Taylor@taylorbrownrealtor.com