Who reviews a pier on the Mississippi coast, how the joint application works, and what to check before you buy waterfront in Hancock County
THE DOUGLAS ADAMS EDITORIAL SERIES
Market Insight • Property Strategy • New Orleans & Mississippi
Updated October 2026
Quick Answer
In Bay St. Louis, building, replacing, or repairing a private pier over coastal waters requires authorization before work begins. The application goes to the Mississippi Department of Marine Resources (DMR), the point of contact for wetlands permits in Hancock, Harrison, and Jackson counties, which checks it for completeness and forwards it to the other agencies involved, including the U.S. Army Corps of Engineers. Many single-family piers fit within a Corps general permit for residential docks and piers, but each project still needs its own written authorization. Waterfront owners have riparian rights recognized in state law, and buyers should confirm that any existing pier was permitted and built as permitted before they close.
Which Agencies Review a Private Pier in Bay St. Louis?
Several agencies have a role, but a homeowner usually deals with one front door. Under agreements with the Corps’ Mobile and Vicksburg districts, applications for work in the Mississippi Coastal Zone are submitted to DMR, which then evaluates them for completeness and forwards copies to the appropriate agencies.
Mississippi Department of Marine Resources. DMR administers the state’s coastal wetlands permitting program under the Coastal Wetlands Protection Act. Its permit information page lists piers, boathouses, and boat lifts among the projects that need authorization.
U.S. Army Corps of Engineers. The Corps regulates work in navigable waters under Section 10 of the Rivers and Harbors Act and discharges into waters of the United States under Section 404 of the Clean Water Act. Its 2023 Mississippi General Permits are issued by the Mobile District, with the Vicksburg District covering areas of Hancock County within the Pearl River Basin.
Mississippi Department of Environmental Quality. Federal permits that may result in a discharge into waters of the United States need a Section 401 water quality certification. MDEQ certified the Corps’ residential dock and pier general permit, with conditions attached.
Mississippi Secretary of State. The Secretary of State oversees leases of public trust tidelands, the state-owned land under tidal waters. Whether a lease applies to a residential pier is covered below.
City of Bay St. Louis or Hancock County. Inside city limits, the Bay St. Louis Building Department handles local permits through its online portal. Outside city limits, building permits, including electrical, are issued through Hancock County Planning and Zoning. Ask the office that covers your address whether your pier, its electrical service, or any related work needs a local permit.
How Does the Joint Application Process Work?
The process begins with one form. DMR accepts the Joint Application and Notification Form by email or mail, or an application through its electronic Wetlands Permitting Portal. Every application needs at least one project diagram. DMR’s submittal requirements call for the dimensions of everything proposed, the dimensions of existing structures, property lines, the approximate shoreline, and any marsh vegetation. Some projects also need a cross-section drawing, a vicinity map, or contact information for adjacent property owners.
DMR’s joint application page lists a $50 fee for residential projects, payable to the Mississippi Department of Marine Resources. Confirm the current fee with DMR when you apply.
For most single-family piers, the federal piece is the Corps general permit known as MSGP-02, “Docks, Piers, Wharves, Boat Shelters.” It covers fixed or floating piers and boat shelters for single-family residential use, and its general conditions require project-specific authorization from the Corps before any work starts. Projects outside its limits may need an individual permit, which involves a longer review.
Two practical steps make the process smoother. Mississippi State University Extension’s homeowner permitting guide recommends a pre-application meeting with DMR to work through questions before you file. A licensed marine contractor, surveyor, or engineer familiar with coastal permitting can also prepare drawings that match what the agencies expect.
What Design Rules Apply to a Residential Pier?
State rules set the baseline. Under Title 22, Part 23, Chapter 8 of the Mississippi Coastal Program, docks, piers, boat shelters, and hoists must not affect the ebb and flow of the tide, must reach navigational depths adequate for their intended use to minimize dredging, must not restrict access to public beach areas, and must not create a navigation hazard. Mooring pilings and buoys need authorization too.
The Corps general permit adds limits on size and placement. As written in the 2023 Mississippi General Permits, MSGP-02 caps fixed or floating structures, not counting the access pier, at 2,000 square feet in total, limits access piers over open water to six feet wide unless otherwise authorized, and does not allow structures over wetlands, shellfish beds, or submerged grasses. It also excludes toilets, habitable structures, and fueling facilities. MDEQ’s water quality certification for the permit requires pilings of steel, concrete, plastic, vinyl, or timber treated for marine use, with no creosote.
These figures come from a permit document dated to run from May 2023 to May 2028. Rules are revised, and a site-specific review can add conditions, so treat them as a starting point and confirm the current limits with DMR and the Corps before you design.
What Are Riparian Rights, and Do I Own the Water Bottom?
Owning the shoreline does not mean owning the water bottom. Under Mississippi law, tidelands and submerged lands are held by the state in trust for the use of all the people. DMR describes tidelands as land covered and uncovered daily by the tides, up to the mean line of the ordinary high tides.
What the upland owner does hold are riparian, or littoral, rights. State law recognizes that littoral and riparian property owners have common law and statutory rights, as summarized in a 2024 opinion of the Mississippi Attorney General. Those rights are tied to the waterfront parcel. A buyer should confirm through the title work and survey that the property actually fronts the water and that nothing in the chain of title has separated the riparian rights from the land.
Where the property line falls along the shore can be a technical question. The same opinion notes that natural accretion adds to the upland owner’s land, while artificial accretion does not move the boundary. If the line matters to your plans, it is a question for a licensed surveyor and, where needed, a real estate attorney.
Do I Need a Tidelands Lease for a Private Pier?
Usually not for an ordinary residential pier, but confirm it. Mississippi law provides that residential property owners shall not be required to obtain a tidelands lease for exercising their littoral and riparian rights. The Secretary of State’s own lease procedure rule states that a person whose activity qualifies for a residential use permit, or is statutorily exempt, is not required to lease.
The Attorney General’s opinion also describes a Secretary of State rule exempting certain structures authorized under the general permits that total 1,000 square feet or less and are not used commercially, while commercial and industrial uses require leases. If your pier is large, serves a rental or business, or is unusual in design, ask the Secretary of State’s Public Lands Division directly whether a lease applies. The Corps general permit itself notes that certain activities within the Coastal Zone may require a lease from the Secretary of State.
Does Repairing or Replacing an Existing Pier Need a Permit?
In most cases, yes. DMR’s permit information page lists “rebuilding or replacing existing structures in the same footprint” and “replacing pilings, whether single pilings or part of a structure” among the activities that need authorization. A few items do not, according to the same page. Running electric or other utility lines along a pier is one, as long as no new pilings are needed.
The Corps general permit covers repair, replacement, and maintenance of previously permitted structures that are currently serviceable, meaning usable as is or with some maintenance, and not so degraded that they essentially require reconstruction. It also allows adding a single-story roof, covering, or boat hoist to an existing open deck or slip without a pre-construction notification, if no new in-water pilings are needed, no slips are added, and the footprint does not grow.
What Happens When a Storm Damages or Destroys a Pier?
After a storm, the first call should go to DMR, before any contractor drives a piling. The distinction that matters is how much of the pier survived. A pier that is still serviceable and needs repair is treated differently under the Corps general permit than one so damaged that it essentially needs to be rebuilt. The pier sections of the general permit do not include a storm-specific provision, so do not assume that a pier which once stood there can simply be rebuilt as it was.
Questions to ask DMR after storm damage:
Was the original pier permitted, and do you have a copy of that authorization?
Does the remaining structure count as serviceable, or will the work be treated as new construction?
Does rebuilding in the same footprint require a new application, and what drawings will you need?
Are any emergency procedures in effect after a declared storm?
Keep photographs of the pier before and after any storm. They help with permitting and with any insurance claim.
What Should Buyers Check Before Buying Waterfront With a Pier?
Ask for the paperwork early, ideally before the end of your inspection period. A pier that looks sound can still carry a permitting problem, and the time to find it is before closing. The items below are what I would want any buyer to see:
The permit history. Ask the seller for every DMR and Corps authorization for the pier, boathouse, lift, and bulkhead, including the permit numbers and approved drawings. DMR and the Corps are the places to confirm what is on file.
As-built versus permitted. Compare what stands today with the approved drawings. Added decking, a larger boathouse, an enclosed room, or extra slips may have been built without authorization.
Condition. A general home inspector may not evaluate pilings, framing, decking, or electrical service over water. Consider a marine contractor or engineer for a separate assessment.
Flood zone and insurance. Check the property’s flood zone on FEMA’s flood maps, which Hancock County references on its Planning and Zoning page. Know that the National Flood Insurance Program’s dwelling policy lists piers, docks, wharves, bulkheads, and seawalls as property not insured. Ask your insurance agent what, if any, coverage is available for the pier and other waterfront structures.
Title and survey. Confirm the riparian frontage, the location of the mean high water line as shown on the survey, and any easements or shared pier agreements with neighbors.
Plans for changes. If you intend to extend the pier, add a boathouse, or add a lift, talk with DMR about feasibility before you settle on a price that assumes those improvements.
How Long Does Pier Permitting Take?
Plan for months, not weeks. Mississippi State University Extension advises homeowners to submit permit applications at least 90 days before construction is planned to begin, because several agencies may need to approve the application. For projects that do not qualify for a general permit, the Corps Mobile District says processing for a standard permit is usually 60 to 120 days from the receipt of a complete application.
Timing depends on how complete the application is, the site, and the season, so ask DMR for a current estimate. A buyer who wants a new or rebuilt pier for a particular season should start the conversation as early as possible.
Frequently Asked Questions
Do I need a permit to build a private pier in Bay St. Louis?
Yes. Piers, boathouses, and boat lifts in Mississippi’s coastal waters require authorization. The application goes to the Mississippi Department of Marine Resources, which forwards it to the U.S. Army Corps of Engineers and other agencies, and a local permit may also apply.
Where do I apply for a pier permit on the Mississippi coast?
With the Mississippi Department of Marine Resources in Biloxi, through its Wetlands Permitting Portal or by submitting the Joint Application and Notification Form by email or mail. DMR is the point of contact for wetlands permits in Hancock, Harrison, and Jackson counties.
Do I need a permit to repair or replace an existing pier?
Usually. DMR lists rebuilding or replacing existing structures in the same footprint, and replacing pilings, among the activities that need authorization. Running utility lines along a pier without adding pilings is one of the exceptions DMR lists.
Do I need a tidelands lease for a residential pier?
Generally not for an ordinary residential pier. Mississippi law says residential property owners are not required to obtain a tidelands lease for exercising their riparian rights, but larger or commercially used structures may need one. Confirm with the Secretary of State’s Public Lands Division.
Does owning waterfront property mean I own the water bottom?
No. Tidelands and submerged lands are held by the State of Mississippi in trust for the public. The upland owner holds riparian rights tied to the waterfront parcel, which include rights recognized under state law.
Does flood insurance cover my pier?
The National Flood Insurance Program’s dwelling policy lists piers, docks, wharves, bulkheads, and seawalls as property not insured. Ask your insurance agent what other coverage may be available.
How long does it take to get a pier permit?
Mississippi State University Extension advises applying at least 90 days before construction is planned. Projects that need an individual Corps permit usually take 60 to 120 days from a complete application. Ask DMR for a current estimate.
What should I ask for when buying a home with a pier?
Ask for every DMR and Corps authorization with its approved drawings, compare them with what has been built, have the pier assessed for condition, and review the survey, title, flood zone, and insurance before closing.
The Bottom Line
A private pier in Bay St. Louis starts with one application to the Mississippi Department of Marine Resources, which brings in the Corps of Engineers and other reviewers, and repairs and storm rebuilds usually need authorization too. Residential owners hold riparian rights and generally do not need a tidelands lease for an ordinary pier, but the water bottom belongs to the state, and the details of each site matter. For a buyer, the pier is part of the purchase: confirm it was permitted, confirm it was built as permitted, and know how it will be insured before you close. Agencies, rules, and fees change, so verify the specifics with DMR, the Corps, and the City of Bay St. Louis or Hancock County, and bring in a real estate attorney for any legal question.
If you are considering a waterfront home in Bay St. Louis, I’ll help you gather the pier’s permit history and the questions to ask before you make an offer, so you know what comes with the shoreline.
Douglas Adams
Douglas Adams Real Estate with Crescent Sotheby’s International Realty
617 Julia St, New Orleans, LA 70130 | 504-444-8670
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About the Author
Douglas Adams is a Global Real Estate Advisor with Crescent Sotheby’s International Realty serving Louisiana and the Mississippi Gulf Coast.
Through The Douglas Adams Editorial Series, he explores the history, architecture, neighborhoods, and communities that make the Gulf South such a remarkable place to call home. Every article is informed by firsthand experience, original photography, professional research, and a passion for telling the stories that exist beyond the front door.