If you are a commercial real estate investor, the recent surge in catastrophic flooding across the Southeast is impossible to ignore. We are seeing properties with no history of flooding suddenly inundated, causing millions in damages.
While these events might make you hesitate to touch a property in or near a flood zone, there is a silver lining: Opportunity. When owners are eager to sell at a discount, an informed investor can pick up prime real estate for pennies on the dollar—provided they know how to protect the asset.
Investing in a flood zone can be a solid choice if the price is right and the mitigation is better. Here are 15 features to look for (or install) to ensure your investment stays afloat.
The Reality of the Risk
Flooding is the most common natural disaster on Earth, accounting for 40% of all events and 75% of state of emergency declarations in the U.S. According to the EPA, coastal flooding has increased fivefold since the 1950s.
The goal of mitigation isn’t necessarily to keep every drop of water out; it’s to minimize the duration of the cleanup and the cost of the damage.
1. Elevated Structures Look for buildings raised above FEMA’s Advisory Base Flood Elevation (ABFE) using stilts or pilings. This allows water to flow under the structure rather than through your lobby.
2. Dry and Wet Floodproofing Dry floodproofing involves sealing walls and windows to keep water out entirely. Wet floodproofing involves designing specific areas to “take on” water in a controlled way to reduce structural pressure.
3. Stormwater Management Systems Does the property have retention ponds, bioswales, or permeable pavement? These features manage runoff and can often lower your flood insurance premiums.
4. Strategic Building Location Nature is your best defense. A building buffered by trees, dunes, or wetlands is significantly more protected than one that sits directly on a parking lot or open shoreline.
5. Flood-Resistant Foundation Materials Avoid wood foundations. Concrete and brick are the gold standard; they prevent structural failure and don’t retain the moisture that leads to toxic mold.
6. Physical Flood Barriers Check for permanent or temporary barriers like flood gates, levees, and berms. These are the “front lines” of defense for your property.
7. Elevated Utilities Fire is a surprising risk in floods. Ensure electrical panels, HVAC units, and critical systems are installed well above the highest recorded flood line.
8. Smart Flood Vents Hydrostatic pressure can collapse a foundation. Flood vents allow water to flow through foundation walls freely, equalizing pressure and saving the building’s structural integrity.
9. Mildew-Resistant Materials Look for treated lumber and mildew-resistant drywall. Without these, a minor flood becomes a total gut-job. With them, you’re looking at a much faster (and cheaper) cleanup.
10. Backflow Prevention Valves One of the “grossest” parts of flooding is sewage backup. These valves are a small, inexpensive feature that prevents city sewage from flowing backward into your building.
11. Code Compliance Ensure the property meets or exceeds current FEMA and local flood codes. This isn’t just about safety; it’s a requirement for securing affordable insurance.
12. Breakaway Walls In high-risk areas, non-load-bearing walls are designed to collapse under the force of water. By “sacrificing” these walls, the main structural frame of your building remains standing.
13. Reinforced Openings Doors and windows should be impact-resistant and waterproof. They aren’t just for wind; they prevent the “breach” that allows water to ruin the interior.
14. Flexible Utility Connections Rigid gas and water lines snap under the weight of moving water. Flexible connections move with the surge, preventing leaks and explosions and shortening your “down-time” post-storm.
15. Floating or Detachable Designs A modern innovation in architecture: some structures are designed to float during a surge or have sections that can be detached and moved. If you are building from scratch, this is the future of coastal CRE.
As an investor, it is painful to save money on capital gains only to lose those profits to flood damage. Success in high-risk zones requires due diligence.
Do your homework, assess the mitigation, and decide if the risk is worth the reward.