Buying on the Lake Michigan shoreline: erosion, permits and due diligence

A lakefront listing sells a view. What you actually buy is a piece of a moving shoreline, governed by two state permit systems on the Michigan side and a different one in Indiana, insured only in part, and priced as if the bluff will stay where it is. This guide covers the risk and the paperwork for the Michiana stretch of Lake Michigan — Berrien County’s lakeshore from New Buffalo to St. Joseph, and the Indiana shoreline around Michigan City — and ends with the list of documents and inspections to order before you commit.

The lake level cycle behind every bluff story

Lake Michigan does not sit still. The Army Corps of Engineers’ monthly bulletin for September 2026 puts August’s mean level for Lakes Michigan-Huron at 579.40 feet, about an inch above the long-term August average and six inches higher than a year earlier. The same bulletin shows how wide the range runs: the record August high, set in 2020, was 582.09 feet, and the record August low, from 1964, was 576.67 feet — a swing of more than five feet in a single month’s history. The Corps’ charts mark record highs in 2020 and 1986 and record lows in 1964 and 2012–2013, depending on the month.

High water is when bluffs lose ground: waves reach the toe, undercut it, and the slope above follows. Low water exposes wide beaches that make a lot look safer than it is. A buyer touring in a low-water year sees the second picture; the house has to survive the first. Ask what the property looked like in 2019 and 2020, and ask for photographs.

Michigan’s High Risk Erosion Areas

Michigan’s Department of Environment, Great Lakes, and Energy (EGLE) designates High Risk Erosion Areas under Part 323 of the state’s environmental code: shorelines receding an average of at least one foot a year over at least 15 years. About 250 miles of Great Lakes shoreline carry the designation. EGLE publishes maps for Berrien County jurisdictions including the City of New Buffalo and New Buffalo Township, Chikaming, Lake, Lincoln, Hagar and Benton townships, the City of Bridgman, the villages of Grand Beach and Shoreham, and St. Joseph Township with the City of St. Joseph.

In a designated area, new structures must sit behind a setback measured from the erosion hazard line, based on projected recession over 30 years for structures built to be readily moveable and 60 years for everything else. The distances vary by stretch of shore; EGLE’s Lake Township map, for example, shows setbacks from 55 and 95 feet in one area to 145 and 275 feet in another. A permit is required for a structure anywhere on a designated parcel, however far from the water — a house, garage, addition, substantial reconstruction, covered porch or septic system. The application fee runs $50 to $500. For a buyer, the practical meaning is that the house you’re touring may be allowed to stand, but a rebuild or an addition may have to move landward, if the lot is deep enough. A valid permit can transfer to a new owner with the current permittee’s written permission, so ask the seller for any permits on file.

Critical Dune Areas

Much of the Berrien shore also falls inside Critical Dune Areas, regulated under Part 353. Michigan designated roughly 74,000 acres of dunes along 265 miles of shoreline in 1989, and a permit is required for activities that significantly alter them: a house or garage, a road or driveway, a septic system, retaining walls, sand removal. Fees run from $150 to $6,000. Simple elevated stairways can be exempt if they meet EGLE’s criteria. Where a dune area overlaps a High Risk Erosion Area, the permits are processed together. One timing note: EGLE completed a legislatively required re-delineation of critical dunes in 2026 and has posted a proposed new atlas, so check the current map for the specific parcel rather than relying on a seller’s memory.

Seawalls and revetments: whose permit?

On the Michigan side

Below the statutory ordinary high water mark — 580.5 feet on Lake Michigan, in the 1985 datum — the lakebed is regulated under Part 325, and seawalls, revetments, docks and fill all need an EGLE permit plus a U.S. Army Corps of Engineers permit. One joint application through EGLE’s online portal reaches both agencies, and processing can take 90 to 150 days depending on the permit category. Work landward of that line may still need a High Risk Erosion or Critical Dune permit. When a listing touts “new shore protection,” ask for every permit number and the engineering drawings.

On the Indiana side

Indiana regulates Lake Michigan construction through the Department of Natural Resources under the Navigable Waterways Act, which requires a permit to place, fill or erect a permanent structure in a navigable waterway. The department’s rule sets Lake Michigan’s ordinary high water mark at 581.5 feet in the 1985 datum. Ask the DNR’s Division of Water whether any existing wall or revetment was permitted, and ask the town — Michigan City, Long Beach, Michiana Shores — what local zoning adds.

What insurance does and doesn’t cover

The National Flood Insurance Program’s definition of a flood includes the collapse or subsidence of land along a lake shore caused by waves or currents exceeding anticipated cyclical levels, when that results in a flood. That is narrower than it sounds. FEMA’s fact sheet on erosion says the standard flood policy does not cover loss of land and excludes gradual erosion. In plain terms: flood insurance may help with a building damaged in a qualifying event, but no policy puts your backyard back. Get a flood quote before the offer, ask the carrier directly about erosion and earth movement, and assume a lender will require flood coverage if the structure sits in a mapped flood zone. The lake-house guide covers the rest of second-home financing, and pre-approval should price the real scenario.

The due diligence list

1. Map checks. Look the parcel up on EGLE’s High Risk Erosion and Critical Dune maps (Michigan) and FEMA’s flood map (both states).
2. Permit history. Request every EGLE, Corps, DNR and local permit for the house, additions, stairs and shore protection.
3. A survey showing the bluff crest, the structure’s distance from it, and the ordinary high water mark.
4. A coastal or geotechnical engineer’s review of bluff stability and the condition of any seawall or revetment — a general home inspector is not qualified to judge either.
5. The standard inspection, with septic and well where present; see the inspection guide.
6. Historic photos from the seller, especially from the 2019–2020 high water.
7. Insurance quotes — flood and homeowners — in hand before the contingency expires.
8. The seller’s disclosure: Indiana’s form requires disclosure of FEMA-mapped flood plain location; Michigan’s asks about flooding. Read both against the permit file.
9. Rental plans, if any, checked against local short-term rental rules.

Put the engineering review and insurance quote inside your inspection contingency. The evaluation checklist and offer toolkit show how to write it.

Where the shoreline markets stand

Through June 2026, New Buffalo’s typical home value is $681K with a 43-day median to contract; St. Joseph sits at $343K typical and a $376K median sale; Michigan City, on the Indiana side, is $196K typical with a 29-day pace. Town-wide numbers blend inland streets with frontage, so they tell you the market’s temperature, not a bluff lot’s value. Current figures are on the market report, and MichianaRealty.com™ updates them monthly. For comparable sales, lean on lots with similar bluff height, setback and shore protection, not just square footage.

Thinking about resale on day one

The buyer after you will ask the same questions. Keep every permit, survey and engineering letter in one file, and keep adding to it. A shoreline owner with documentation sells from strength — the lake-house selling guide explains why — and one without it hands the next buyer a reason to discount. Buying directly from an owner works well here too, because the owner holds the history no listing sheet carries; the buy-direct playbook covers how to ask for it.

Frequently asked questions

What is a High Risk Erosion Area in Michigan?

It is a stretch of Great Lakes shoreline that EGLE has found receding at least one foot a year on average over at least 15 years. New structures there must meet setbacks based on 30- or 60-year projected recession, and a permit is required for a structure anywhere on the parcel. Berrien County has designated areas from New Buffalo to St. Joseph.

Do I need a permit to build a seawall on Lake Michigan?

Generally yes. In Michigan, work below the ordinary high water mark of 580.5 feet needs an EGLE Part 325 permit and a Corps of Engineers permit, filed through one joint application. In Indiana, the DNR requires a Navigable Waterways Act permit for permanent structures in Lake Michigan. Local rules may add more.

Does flood insurance cover shoreline erosion?

Only narrowly. The federal flood program covers some sudden erosion damage to insured buildings tied to a qualifying flood, but the standard policy excludes gradual erosion and never covers loss of land. Ask the carrier about your specific parcel before you offer.

How much do Lake Michigan water levels change?

A lot. The Corps of Engineers’ September 2026 bulletin put August 2026 at 579.40 feet for Lakes Michigan-Huron, against a record August high of 582.09 feet in 2020 and a record August low of 576.67 feet in 1964 — more than five feet of range in one month’s record.