Can I Sell Land That's Inside a Coastal Barrier Resources System Unit?
Key Takeaways
- A CBRS designation is not a flood-zone rating — it's a federal spending ban. The Coastal Barrier Resources Act (16 U.S.C. § 3501 et seq.) cuts off most new federal expenditures and financial assistance, including NFIP flood insurance, inside mapped coastal barrier units — a restriction that exists independently of, and can stack on top of, any FEMA Special Flood Hazard Area rating on the same parcel, according to the U.S. Fish and Wildlife Service.
- The flood-insurance bar is written to attach to structures, not raw land. Under 42 U.S.C. § 4028(a), new NFIP flood insurance has been unavailable for new construction or substantial improvements inside CBRS System Units since October 1, 1983 — a rule that constrains what a future builder can insure, not what a vacant-land owner can sell today.
- Not every CBRS unit carries the same restriction. In a System Unit, CBRA's full suite of federal-spending limits applies; in an Otherwise Protected Area (OPA), federal law restricts only new NFIP flood insurance, under 42 U.S.C. § 4028(b), for structures built after November 16, 1991 — everything else about federal spending in an OPA is unrestricted, per FWS Service Manual 651 FW 1.
Can I Sell Land That's Inside a Coastal Barrier Resources System Unit?
Yes. A Coastal Barrier Resources System (CBRS) designation doesn't block a sale — it's a federal rule that cuts off most new federal spending, most importantly new NFIP flood insurance, on land inside a mapped coastal barrier unit under the Coastal Barrier Resources Act (16 U.S.C. § 3501 et seq.). For a vacant parcel with no structure on it, the practical effect today is smaller than most owners assume: the flood-insurance restriction is written to attach to structures built or substantially improved after the unit's designation date, not to raw land changing hands between owners.
This is a different legal animal than a FEMA flood-zone rating, and the two get confused constantly. If your parcel sits in a mapped FEMA Special Flood Hazard Area, see our guide on selling land in a flood zone; if a flood map revision changed your zone, see what a flood map revision means for your land. Both of those are questions about FEMA's flood insurance rate maps. A CBRS unit is a boundary drawn by the U.S. Fish and Wildlife Service under a completely separate statute, and a parcel can carry a CBRS designation, a flood-zone rating, both, or neither, all independently of each other. For more situations like this, see the Jerez Land blog.
What Is the Coastal Barrier Resources System, and Why Is My Land Inside One?
The Coastal Barrier Resources System — officially the John H. Chafee Coastal Barrier Resources System — is a set of federally mapped, undeveloped coastal barrier units where Congress cut off most new federal spending and financial assistance to stop taxpayer-subsidized development of ecologically fragile shoreline. It was created by the Coastal Barrier Resources Act of 1982, codified at 16 U.S.C. § 3501 et seq., and is administered by the U.S. Fish and Wildlife Service, not FEMA.
The system started small and grew substantially over time:
- 1982: CBRA established the original system with 183 units covering roughly 143,000 acres, according to FWS.
- 1990: The Coastal Barrier Improvement Act (CBIA) expanded the system by about 2.6 million acres, adding new units in Puerto Rico, the U.S. Virgin Islands, the Great Lakes, and the Florida Keys, and it created the Otherwise Protected Area category discussed below.
- Today: FWS reports the CBRS spans 942 units across roughly 3.8 million acres in 24 states and territories along the Atlantic, Gulf, Great Lakes, Puerto Rico, and U.S. Virgin Islands coasts — split into 592 System Units (about 1.4 million acres) and 350 Otherwise Protected Areas (about 2.4 million acres). A 2024 addition of roughly 294,000 acres was the largest single expansion since 1990.
Your land didn't move — the federal boundary was drawn around it. Most CBRS parcels were privately owned or platted long before the unit existed; the designation simply means the federal government decided the surrounding barrier landform was worth protecting from subsidized development, and your parcel happened to fall inside the line FWS drew.
Which of Our States Have CBRS Units — Including a Great Lakes Surprise
Alabama, Georgia, Mississippi, North Carolina, and South Carolina — all five of our coastal states — have confirmed CBRS units, according to FWS's unit-by-county listing. Examples include Baldwin and Mobile Counties in Alabama, Bryan and Liberty Counties in Georgia, Jackson and Harrison Counties in Mississippi, Currituck and Dare Counties in North Carolina, and Horry and Georgetown Counties in South Carolina.
What most owners don't expect: Michigan has CBRS units too, and they have nothing to do with an ocean. The 1990 Coastal Barrier Improvement Act extended the system to the Great Lakes, following a separate 1988 Great Lakes Coastal Barrier Act that directed FWS to map and recommend undeveloped Great Lakes shoreline for inclusion. FWS's county list shows Michigan units in counties including Monroe and Huron. If you own Michigan shoreline land and have never thought about "coastal" designations because you're nowhere near an ocean, this is the one federal program that can still reach you. Oklahoma, Pennsylvania, and Tennessee — our three inland states — have no coastline and no CBRS units.
Is a CBRS Designation the Same Thing as Being in a Flood Zone?
No. A FEMA flood zone (like Zone AE or Zone X on a Flood Insurance Rate Map) is a risk rating that describes how likely a location is to flood. A CBRS designation is a funding-eligibility boundary administered by the U.S. Fish and Wildlife Service that restricts federal spending regardless of flood risk. They come from different agencies, different statutes, and different maps, and a parcel's status on one tells you nothing about its status on the other.
That means a parcel can be in a low-risk FEMA Zone X and still sit inside a CBRS unit — federal flood insurance can still be unavailable for a future structure there, because the restriction isn't about measured flood risk, it's about whether the land is inside the mapped coastal barrier boundary. The reverse is also true: a parcel can be in a high-risk FEMA Special Flood Hazard Area and be completely outside any CBRS unit, in which case NFIP flood insurance is available in the ordinary way, subject to the flood zone's own rating and premium. Always check both maps separately — FEMA's Flood Map Service Center for the flood-zone rating, and the CBRS Mapper (below) for the CBRS boundary. Neither map substitutes for the other.
What's the Difference Between a System Unit and an Otherwise Protected Area (OPA)?
The CBRS contains two distinct types of units, and the restriction that follows is very different depending on which one covers your parcel. FWS distinguishes them clearly in its policy manual: a System Unit is subject to CBRA's full range of federal-spending prohibitions, while an Otherwise Protected Area (OPA) — land already held for conservation, recreation, or wildlife-refuge purposes under federal, state, local, or qualified nonprofit ownership — has federal spending restricted only for new NFIP flood insurance, with no other federal-spending limits attached.
OPAs are identifiable on official CBRS maps by a "P" suffix on the unit number (for example, a unit numbered "AL-01P"). The distinction matters because a private inholding inside an OPA faces a narrower legal restriction than a parcel inside an ordinary System Unit — but private land inside either type is still privately owned and sellable; the OPA's conservation purpose belongs to the surrounding public or nonprofit holding, not to your parcel.
| CBRS System Unit | CBRS Otherwise Protected Area (OPA) | FEMA Special Flood Hazard Area | |
|---|---|---|---|
| What it restricts | Most new federal expenditures and financial assistance for development — construction/purchase of structures, roads, bridges, erosion-control projects — plus new NFIP flood insurance | Only new NFIP flood insurance for structures whose use doesn't match the area's protective purpose | Nothing directly; it's a risk rating that drives NFIP premiums and, for federally backed mortgages, a flood-insurance purchase requirement |
| Statutory basis | 16 U.S.C. §§ 3503–3505 (general expenditure limits); 42 U.S.C. § 4028(a) (flood insurance, effective Oct. 1, 1983 for original units) | 42 U.S.C. § 4028(b) (flood insurance only, effective for structures built after Nov. 16, 1991) | National Flood Insurance Act, implemented through FEMA's Flood Insurance Rate Maps |
| Depends on a structure's build date? | Yes — the flood-insurance bar applies to new construction or substantial improvement after the unit's designation date; earlier structures can retain eligibility | Yes — same build-date logic, keyed to the Nov. 16, 1991 threshold, unless the structure's use matches the OPA's protective purpose | Not for eligibility — flood insurance is available regardless of build date, though older "pre-FIRM" structures may get different rating treatment |
| Who determines it | U.S. Fish and Wildlife Service (maps and CBRS Mapper); implemented for insurance purposes through FEMA/NFIP | U.S. Fish and Wildlife Service, same process as System Units | FEMA, through Flood Insurance Rate Maps |
| Marked on the map as | Numbered unit (e.g., "AL-05") | Numbered unit with "P" suffix (e.g., "AL-01P") | Shaded zone on a FEMA FIRM panel |
I Own Vacant Land in a CBRS Unit — Does This Restriction Even Apply to Me Right Now?
Largely, no — not today. FWS states plainly that if the insurable structures on a property sit outside the CBRS boundary, the flood-insurance restriction doesn't reach them, and the same logic runs the other direction: raw land with no structure on it isn't the thing CBRA restricts. The statute's flood-insurance provision, 42 U.S.C. § 4028, is written around "new construction or substantial improvements of structures" — it governs what a builder can insure after they build, not whether you can convey title to unimproved acreage. Selling vacant land inside a CBRS unit is not a federally restricted transaction.
Where the restriction actually bites is downstream, for whoever eventually builds on the parcel. A buyer who wants to construct a home or cabin on land inside a System Unit — or inside an OPA, for a use inconsistent with the OPA's protective purpose — generally cannot get new NFIP flood insurance on that structure once it's built, under 42 U.S.C. § 4028(a) or (b) depending on the unit type. That doesn't make the structure uninsurable outright: a private, non-NFIP flood insurance market exists and is commonly marketed to buyers in CBRS areas as an alternative, though FWS itself states it has no information about private carriers and doesn't make recommendations, so terms, availability, and pricing have to be confirmed directly with a private flood insurer rather than assumed. What CBRA does directly affect is financing — a federally insured lender can still make a loan secured by a structure that isn't NFIP-eligible, per 42 U.S.C. § 4028(a), but many lenders treat the absence of NFIP eligibility as a reason to require a larger private policy or decline the loan outright, which is the real-world reason CBRS parcels lean toward cash buyers once someone wants to build.
How Do I Find Out for Certain Whether My Parcel Is Inside a CBRS Unit?
Use the official CBRS Mapper, run by FWS and the USGS, to check your specific parcel rather than relying on a general sense of "the coast is CBRS around here." The Mapper lets you search by address, coordinates, or parcel location, shows the CBRS boundary overlaid on aerial imagery, and includes a free self-service CBRS Validation Tool that generates a "CBRS Mapper Documentation" record stating whether a location is inside or outside the system and, if inside, the applicable flood-insurance prohibition date.
If your parcel is close to a boundary line — within about 20 feet, what FWS calls the "CBRS Buffer Zone" — the Validation Tool won't give a definitive in/out answer, and you'll need an official CBRS Property Determination instead. Property owners, buyers, and their representatives can request one by emailing CBRAdeterminations@fws.gov with the property address, the Validation Tool output, and supporting documentation such as a survey, deed, or plat map; FWS issues an official determination letter, and there's no formal appeals process, though FWS will reconsider a determination if you submit new supporting information. Insurance agents specifically working an NFIP policy question are directed to route their requests through NFIP Direct or the relevant NFIP Write Your Own insurer rather than FWS.
Will My CBRS Parcel Actually Sell, and What Are My Options?
Yes, vacant land inside a CBRS unit sells regularly — the restriction is real but narrower than the name makes it sound, and it mainly shapes what a future buyer can build and insure, not whether you can transfer title today. Some CBRS parcels also carry overlapping wetlands characteristics, since coastal barrier habitat often includes fringing marsh; if that applies to your land, see our guide on selling wetlands. And if the combination of access, buildability, and insurance friction has made your parcel genuinely hard to develop, our guide on selling unbuildable land covers that broader category.
You have a few realistic paths forward:
Option 1: Get an official CBRS status determination before you market the land. Knowing definitively whether you're in a System Unit, an OPA, or outside the CBRS entirely — and what date governs flood-insurance eligibility for any future structure — lets you and a buyer negotiate from facts instead of a vague sense that "the land might be restricted."
Option 2: Market to buyers who plan to keep the land undeveloped or use it recreationally. Because the core restriction is about new construction and financing, a buyer with no near-term building plans is largely unaffected by CBRA day to day.
Option 3: Sell directly to a cash buyer who evaluates CBRS status as part of underwriting. A direct buyer like Jerez Land pulls the CBRS Mapper result, checks whether you're in a System Unit or OPA, and factors the real restriction — not an inflated one — into a firm written cash offer, without requiring you to sort out federal designations before closing.
Request a no-obligation cash offer and we'll walk through your parcel's CBRS status and what it does and doesn't restrict — no formulas, no percentage of anything, just a parcel-specific number based on your land. For more guides on selling land in situations like this one, visit the Jerez Land blog.
Frequently Asked Questions
I just found out my land is in a Coastal Barrier Resources System unit — does that mean I can't sell it?
No. A CBRS designation restricts new federal spending and, for structures, new NFIP flood insurance — it does not restrict your ability to sell or convey title to vacant land. Selling raw acreage inside a CBRS unit is not a federally restricted transaction; the restriction is aimed at future construction and federal financing for that construction, not at the sale itself.
My property is rated a low-risk FEMA Zone X — how can it also be restricted by CBRS?
Because CBRS status and FEMA flood-zone ratings come from two entirely separate systems that don't track each other. A FEMA flood zone measures modeled flood risk; a CBRS designation marks a federally protected coastal barrier boundary regardless of that risk rating. A parcel in a low-risk Zone X can still sit inside a CBRS unit, in which case new NFIP flood insurance for a future structure there can still be unavailable — check the CBRS Mapper and your FEMA flood map separately, because neither one tells you the other's answer.
Someone told me my land is "in a CBRS zone" — is that the same as a wetlands or flood-zone designation?
No, all three are different federal or state programs. A wetlands designation (typically from the Army Corps of Engineers or a state agency) restricts what you can build, fill, or disturb on the land itself. A FEMA flood zone rates flood risk and drives insurance premiums. A CBRS designation, administered by the U.S. Fish and Wildlife Service under the Coastal Barrier Resources Act, restricts new federal spending and new NFIP flood insurance in a mapped coastal barrier unit. A single parcel can carry any combination of the three, and each one has to be checked against its own map.
I inherited raw land in a CBRS unit in South Carolina — am I losing insurance I currently have?
Not because of anything happening now. The CBRS flood-insurance restriction under 42 U.S.C. § 4028 applies to new construction or substantial improvement of structures after the unit's designation date; it doesn't apply retroactively to an existing NFIP policy on a structure that predates that date, and it has no bearing at all on unimproved land, which carries no structure to insure. If there's an existing structure on the property, confirm its NFIP status and build date directly with FEMA or your insurance agent rather than assuming coverage changed.
Does Michigan really have CBRS units? I thought this was strictly an ocean-coast program.
Yes. The 1990 Coastal Barrier Improvement Act extended the CBRS to the Great Lakes, following up on a 1988 law that directed the U.S. Fish and Wildlife Service to map undeveloped Great Lakes shoreline for possible inclusion, and FWS's official unit-by-county listing shows Michigan units in counties including Monroe and Huron. If you own Great Lakes shoreline land in Michigan, it's worth checking the CBRS Mapper even though there's no ocean anywhere near it.
How do I get an official answer on whether my specific parcel is inside the CBRS, not just a general sense of the area?
Use the free CBRS Mapper's Validation Tool first — it lets you search your exact address or coordinates and produces documentation stating whether the location is inside or outside the system. If your parcel falls within about 20 feet of a boundary line, the Validation Tool can't give a definitive answer, and you'll need to request an official CBRS Property Determination by emailing CBRAdeterminations@fws.gov with your address, the Validation Tool output, and supporting documents like a deed or survey.
Disclaimer: This article is for informational purposes only and does not constitute legal, financial, or professional advice. Laws and regulations vary by jurisdiction and change over time. Always consult a licensed real estate attorney or insurance professional before making decisions about coastal barrier designations, flood insurance eligibility, or property transactions. Jerez Land is not responsible for actions taken based on this information.