Tom Brickley remembers the sleepless nights. His home sits on the Lake Michigan shoreline in Berrien County, and when the Great Lakes climbed to record-breaking levels by 2020 after a decade of extreme rainfall and reduced evaporation, the water started eating into the dune behind his house. He was not alone. Waterfront owners up and down the Southwest Michigan coast spent those years watching bluffs they had trusted for decades start to move.

The water has eased back since then. Lake Michigan-Huron sat at 579.40 feet in June 2026, up two inches from May, and the U.S. Army Corps of Engineers' most recent weekly water level update projects a further two to three inch decline by August 31. That is a calmer number than the one that kept Brickley up at night. But here is what most buyers and even some sellers get wrong when they see a quieter lake: the rules that govern what you can build, rebuild, or armor on that shoreline were never written around this year's water level. They are written around a 30-year and 60-year forecast, and they do not reset because the lake dropped an inch or two this summer.

The real risk in a Lake Michigan waterfront transaction right now is not the water. It is the patchwork of rules sitting underneath it, rules that can change completely within a few miles of shoreline, sometimes at a township line you would never notice from the beach.

The permit clock that can outrun your closing date

Michigan's Department of Environment, Great Lakes, and Energy designates stretches of shoreline eroding at an average of one foot or more per year over a minimum 15-year period as High-Risk Erosion Areas. Roughly 250 miles of Michigan's Great Lakes coast currently carry that designation. If a parcel falls inside one, a permit is required for construction anywhere on that parcel, regardless of how far back from the water the project sits. That includes a new addition, a garage, a septic upgrade, or substantial reconstruction of an existing home.

The part that catches buyers off guard mid-transaction is the timeline. EGLE's own rules state that once a complete application is received, the department has up to 60 days to send notice of approval or disapproval. A permit application that does not require a field investigation can move faster, in about 20 days. But a standard Michigan residential closing often happens in 30 to 45 days. If your renovation plans depend on a permit and your closing does not, you can end up owning a house before you know whether your project is approved.

The setback distances themselves come in two flavors:

• A 30-year setback for structures considered readily moveable, meaning they meet specific construction criteria and have access wide enough for a house mover to relocate them if the shoreline keeps receding.
• A 60-year setback for structures that are not readily moveable, including homes with a foundation larger than 3,500 square feet, and for septic systems.

Existing homes are not required to move to meet these setbacks. But any future addition, and any septic system upgrade, triggers a new permit review against the line that applies to your parcel.

Same lake, different rules a few miles apart

This is where the story gets local. Chikaming Township, near Bridgman, banned hard shoreline armoring and put a 150-foot setback in place for new shoreline development. Township Supervisor David Bunte put it plainly when asked why: the township did not want to become a community of solid, hardened shoreline. Compare that to Saugatuck Township farther north, which took a different but related approach, requiring new shoreline homes to sit far enough inland that it would take 60 years of erosion for waves to reach them. Saugatuck Township Manager Daniel DeFranco has noted that the small, easily relocated cottages of an earlier era have increasingly given way to larger, permanent homes that are harder to move and, in some cases, more likely to destabilize the bluff during construction.

A Michigan State University study published in January 2026 in the Journal of Great Lakes Research and covered by Great Lakes Echo and Great Lakes Now put a number on what this policy divergence actually looks like on the ground. Lead author Ethan Theuerkauf and his team documented a fivefold increase in shoreline armoring, seawalls, rock revetments, and similar structures, along Lake Michigan's eastern coast between 2014 and 2021. Chikaming Township stood out in the data as showing substantially lower levels of armoring than its neighboring municipalities, which the researchers attributed directly to its restrictive local policy. Theuerkauf's framing is worth sitting with: policies restricting armoring can visibly change the character of a shoreline, and that is exactly what shows up when you compare aerial imagery of Chikaming's coast to the townships on either side of it.

For a buyer comparing two listings a few miles apart, this means the seawall on one property might be entirely legal to repair or replace, while an identical seawall on the other side of a township boundary might not be permittable at all if it needs substantial reconstruction. The lake does not change. The rulebook does.

Why Berrien's own numbers are newer than most of the state's

There is a detail buried in EGLE's own data documentation that matters more than it first appears. The department is supposed to update its recession-rate studies, the historical measurements that determine where those 30-year and 60-year setback lines actually sit, every ten years. In practice, most Lower Peninsula counties along Lake Michigan have not been updated since the mid-1990s. Berrien County is the exception. Its recession-rate study was last updated in 2007.

That is still not current by the letter of the rule, but it means the setback lines on file for Berrien County shoreline parcels are grounded in measurements roughly fifteen years newer than what most of the rest of the Lower Peninsula's Lake Michigan coast is working from. If a buyer or an attorney ever questions why a setback line looks different from a neighboring county's, or wonders how reliable the number really is, that is the honest answer: it is more recent than most, even if it is not brand new.

What the disclosure form actually requires, and what it leaves to you

Michigan's Seller Disclosure Act requires sellers to complete a standard form covering known conditions, including whether the property carries flood insurance and any known environmental or structural issues the seller is aware of. It does not require sellers to hire an engineer to assess a seawall's condition, and it does not carry a line item specifically asking whether a parcel sits inside a designated High-Risk Erosion Area. That gap is exactly why a seller working with an agent who understands the shoreline regulatory picture has an advantage. Naming the HREA status, any existing permit history, and the age of any armoring on the property upfront, even though the form does not force it, is the kind of transparency that builds trust with a buyer's agent and avoids a renegotiation after inspection.

One mechanical detail worth knowing on both sides of the table: a valid EGLE permit can be transferred to a new property owner with the written permission of the current permittee, submitted through the state's MiEnviro Portal. If a seller has an approved but unused permit for shoreline work, that permit has real value and should be part of the conversation, not an afterthought discovered after closing.

The lake is calmer this summer. The rulebook is not.

As recently as this spring, Berrien County closed a stretch of Red Bud Trail due to weather-related erosion, a small but current reminder that erosion is an active, ongoing condition in this county and not a story that ended with the high water years of 2019 and 2020. The lake is quieter right now. The rules that decide what you can build, rebuild, or armor were written for a longer horizon than this season's water level, and they differ from one township to the next in ways that rarely show up in a listing description.

A few questions worth asking before you write an offer

Does every Lake Michigan home in Southwest Michigan fall inside a High-Risk Erosion Area? No. The designation applies to specific mapped stretches of shoreline that meet the one-foot-per-year recession threshold. Township maps and EGLE's online tools show whether a specific parcel is inside one.

If my house is already inside a setback line, do I have to move it? No. EGLE's guidance is clear that existing structures are not required to relocate to meet current setbacks. The setback only applies to future construction, additions, or significant reconstruction.

Can I take over a permit the current owner already has? Yes, with the seller's written permission and a transfer request filed through MiEnviro Portal. It is worth asking about during negotiations rather than after closing.

If you are weighing a Lake Michigan property in Bridgman, Sawyer, New Buffalo, or anywhere else along this stretch of coast, the township lines matter as much as the tax lines. Wortman Group works this shoreline every week and can walk you through what a specific parcel's setback status and permit history actually mean before you write an offer. Request a private consultation and valuation to start that conversation.