What is a critical dune area?
Some of Michigan's most beautiful home sites sit inside a state-regulated dune system — and many buyers find out after the offer. Here's what the designation means before you fall for the view.
Rennie Barton · July 23, 2026 · 5 min read
In this article
Michigan's lakeshore dunes are considered a unique natural resource, and the state protects roughly 80,000 acres of them under the Critical Dune Areas Program administered by EGLE — the Department of Environment, Great Lakes, and Energy. If a property falls inside a mapped critical dune area, certain construction and earth-moving activities require a state permit on top of anything the township requires.
What the designation can affect
- Building a new home, garage or guest house on the parcel
- Additions, decks and other footprint expansions
- Driveways, stairs to the beach and retaining structures
- Grading, excavation and significant vegetation removal
- Septic system placement and replacement areas
Separately, Michigan's High Risk Erosion Area program maps shorelines that are receding over time — in some stretches a foot or more per year on long-term average — and applies building setbacks based on those recession rates. A bluff-top parcel can sit in both programs at once: dune-regulated and erosion-mapped.
Why buyers get surprised
None of this appears in a standard home inspection, and it isn't always obvious in a listing. Owners have discovered after closing that the deck they planned needs a state permit, or that the buildable envelope on their 'vacant lake lot' is a fraction of the acreage. The maps are public — EGLE publishes both the critical dune boundaries and the high-risk erosion designations — but you have to know to look.
The right way to buy inside the dunes
- Confirm whether the parcel touches a mapped critical dune or high-risk erosion area before the offer, not after
- Read any past EGLE permits on the property — what was approved tells you what's plausible next
- If slope or bluff movement is visible, bring in a geotechnical opinion early
- Ask the township about its own dune and bluff setback rules, which stack on top of the state's
A dune parcel isn't a problem — some of the finest homes in West Michigan stand inside these boundaries. It's simply a property with rules, and rules reward buyers who read them first. That's the entire philosophy behind our waterfront buying process.