On June 10, 2026, FEMA is officially updating its flood maps for all of Honolulu County.

This isn't just "government paperwork." For thousands of us, it means our homes are being moved into new high-risk zones, which changes everything from our monthly mortgage payments to what we can do with our property.

Here's the breakdown of what's happening and how you can stay ahead of the curve.

The "So What?" — Why This Matters to You

For most Oʻahu homeowners, the June 10, 2026 map update comes down to two things: money and rules.

• Mandatory Insurance

If your home is moved into a Special Flood Hazard Area (SFHA)—which includes any zone starting with the letters A or V—and you have a federally backed mortgage, flood insurance is no longer optional.

The Zones: This includes Zones A, AE, AH, AO, AR, A99, V, and VE.

The Loan Types: If you have an FHA, VA, USDA, or conventional loan (including those sold to Fannie Mae or Freddie Mac), your lender is legally required to ensure you have a flood policy in place to protect the collateral.

The Cost: Since your regular homeowners insurance policy doesn't cover floods, this becomes a brand-new monthly expense that your bank will likely require you to escrow as part of your mortgage payment.

• The "Grandfather" Phase-Out

Many older Waikīkī buildings have been "grandfathered" into lower rates based on maps from the 1980s or 1990s. With the new maps, these older subsidies are being phased out.

If the new map shows a higher risk for your street than the old one did, your building loses its historical protection and must move toward a "Full Risk" rate.

• Building Restrictions

Being in a flood zone means the City has stricter rules regarding renovations.

If you complete renovations costing more than 50% of the market value of the unit, the City & County of Honolulu may require the entire unit to be brought up to the new June 10, 2026 building codes.

4 Steps to Take Right Now (Be Proactive!)

Don't wait for a stressful letter from your bank. Take these steps today to keep your costs down:

1. See Where You Stand

Knowledge is power.

You can actually see the "before and after" of your property right now.

The best local tool: Head over to Resilient Oʻahu's Map Slider. You can move the map back and forth to see whether your specific street is moving into a new zone on June 10.

2. Snag the "Newly Mapped" Discount

If your home is being moved into a high-risk zone for the first time, you may qualify for FEMA's Newly Mapped Discount, which can save you up to 70% on your initial premium.

However, you must act within 12 months of the map change, so contact your insurance agent before June 10 to lock it in.

3. Document Everything

The 2026 floods were a wake-up call.

Take photos of your home's foundation and where your AC unit and water heater are located. If these systems are elevated above the ground, you might qualify for a Mitigation Discount, which could save you another 5%.

4. Condo Owners: Talk to Your Board

If you live in a condominium building, your AOAO is likely already discussing these changes.

Master policy premiums for the entire building could increase, potentially leading to higher monthly maintenance fees. Ask your board how they're preparing for the June 10 update.

How This Affects Your Property Value

It's the question every owner asks:

"Will my home be worth less?"

Statistically, properties moved into high-risk flood zones can experience a dip in resale value—sometimes as much as 10% to 15%—simply because the cost of ownership has increased through higher insurance premiums and maintenance fees.

Buyers often factor these additional monthly costs into their offer price.

However, in a tight market like Honolulu, desirability often outweighs these expenses if you can demonstrate that the home is protected and the costs are being effectively managed.

Thinking of Selling? An "Outside the Box" Strategy

If you were already considering a move, the June 10 deadline adds another layer of complexity.

Here's a creative way to navigate it:

The "Discount Transfer" Strategy

Did you know that FEMA allows you to transfer your flood insurance policy—and its discounts—to a new buyer?

The Play: Instead of having the buyer shop for a new, full-priced policy, you can assign your existing policy with the Newly Mapped Discount to them at closing.

The Value: This can make your property much more attractive than the unit next door because you're essentially handing the buyer a massive "coupon" for lower insurance rates that stays with the property.

It's a powerful negotiating tool that can help protect your asking price.

— Jennifer Peele