By Natallie Liz, REALTOR® | Island Welcome Real Estate
As a third-generation Keys native, I grew up around conversations about high water, storm tides and how a house sits on its lot. Today those same questions come up with almost every buyer and seller I work with, only now they arrive with maps, letters and acronyms attached.
After 25 years teaching in Monroe County classrooms, I still like to break hard topics into plain pieces. So here is a simple walk-through of flood zones and elevation certificates, what they tell you, and what to ask before you buy or sell.
What a Flood Zone Actually Tells You
A flood zone is FEMA's way of describing a property's flood risk on its Flood Insurance Rate Map, often called a FIRM. In the Keys you will mostly hear about two families of zones:
- V or VE zones are coastal high hazard areas, closest to open water, where waves add to the risk. Building rules are stricter here.
- A or AE zones are areas expected to flood in a major storm, but with less wave action. Much of the Keys falls into this group.
The zone matters for two big reasons: how a home must be built or rebuilt, and whether a lender will require flood insurance. Your lender and insurance agent will tell you exactly what applies to a specific address.
Where the Keys Flood Maps Stand Right Now
This is the part many people are surprised by. According to Monroe County, FEMA released new preliminary coastal flood maps for the Keys in December 2019, replacing studies that were more than 30 years old. The formal appeal period closed on June 23, 2021, the county's consultant filed an appeal, and FEMA is still reviewing it. The county also notes that FEMA plans to issue another set of preliminary maps before anything becomes final.
In short, the preliminary maps are not adopted yet. The maps in effect today are still the older ones, and you can look up any address on FEMA's Flood Map Service Center.
One more detail that trips people up: the new maps use a different vertical measurement system (NAVD88 instead of the older NGVD29). The county explains that, on average, numbers on the new maps read about 1.5 feet lower for the same height, and that the difference varies from place to place. The county's advice is to add roughly 1.5 feet to any apparent increase, so a change can be bigger than it first looks. This is exactly the kind of detail worth reviewing with a surveyor or the floodplain office.
What an Elevation Certificate Is
An elevation certificate, or EC, is a form completed by a licensed surveyor, engineer or architect. It records the home's flood zone and measured heights, such as the lowest floor and the location of equipment like the air handler, compared with the base flood elevation for that spot.
Think of it as the home's report card for flood risk. Two homes on the same canal can look alike from the street and have very different certificates.
Do you still need one?
Under FEMA's current pricing system, Risk Rating 2.0, an elevation certificate is no longer required to buy a National Flood Insurance Program policy, according to FloodSmart, FEMA's flood insurance site. It can still be provided to an insurance agent to see whether it lowers the premium. Monroe County's own flood insurance page encourages owners to have one so accurate elevation data is used.
My practical advice: if a seller has one, ask for it early. If not, a buyer can often order one during the inspection period. A recent certificate can make the insurance conversation much clearer.
Local Details That Change the Picture
Every area keeps its own rules
Unincorporated Monroe County, Key West, Marathon, Islamorada and Key Colony Beach each run their own floodplain and building programs. A home on Big Pine Key, one in Old Town Key West and one in Islamorada can follow different offices and slightly different procedures. Knowing which office governs a property is the first step.
Ground floor enclosures
Many Lower Keys and Middle Keys homes are built up on pilings with an enclosed area underneath. Rules limit how space below the base flood elevation can be built and used. Unincorporated Monroe County runs a Certificate of Compliance program that inspects these lower enclosures. If a home has finished space downstairs, ask how it was permitted before you plan around it.
The 50 percent rule on older homes
Many classic Keys homes, including older block houses and Conch-style cottages, were built before today's flood standards. The City of Key West explains that when improvements or repairs over a one-year period reach 50 percent or more of the building's market value (not counting the land), the home generally must be brought up to current elevation standards. Similar rules apply elsewhere in the Keys. This can shape renovation budgets, so it is worth understanding before you buy a home you plan to remodel.
Community discounts
According to Monroe County, the unincorporated county holds a Class 3 rating in FEMA's Community Rating System, and flood policyholders there receive a 35 percent discount on annual premiums. The county also notes that current premium discounts can transfer to new owners at sale. Ask the seller for a copy of the current flood policy declarations so your agent can compare.
A Simple Checklist for Buyers and Sellers
- Look up the current flood zone at msc.fema.gov.
- Ask for any existing elevation certificate and the current flood policy declarations page.
- Confirm which office governs the property: the county or a city or village.
- Ask how any downstairs enclosure was permitted.
- If you plan to renovate, ask the building department about substantial improvement before you write an offer.
- Get insurance quotes during your inspection period, not after closing.
For unincorporated Monroe County, the floodplain office can be reached at 305-292-4491 or [email protected], and flood map questions go to 305-453-8759 or [email protected]. City residents should contact their own building department.
I am not an insurance agent, surveyor, engineer, attorney or floodplain official. This is general information, and the right professionals and your local building or floodplain office should confirm the details for any specific property.
Frequently Asked Questions
Is a home in a VE zone a bad buy?
Not by itself. A VE zone means stricter building rules and usually higher insurance costs. How the home was built, its elevation and its condition matter as much as the zone. Review the numbers with an insurance agent before deciding.
Will the new flood maps change my zone?
They might, but the preliminary maps are not final, and the county says FEMA plans to release another preliminary set first. You can compare current and preliminary maps through FEMA and Monroe County's online tools.
Who prepares an elevation certificate?
A licensed land surveyor, engineer or architect. Costs and timing vary, so it helps to order one early in a purchase.
Here When You Need a Hand
Flood questions do not have to slow you down. If you are thinking about selling, start with what your home is worth. If you are looking, you can search homes across the Keys, and I am happy to help you read the maps and certificates along the way. Call or text me at (305) 879-7658 or email [email protected].
Natallie Liz, REALTOR® | Island Welcome Real Estate | (305) 879-7658
Flood maps, insurance rules and local codes change. Please verify all details with FEMA, your local building or floodplain office and your insurance professional.
