Before you make an offer: the flood and wind insurance playbook for South Florida and the Keys

1. Insurance is part of your mortgage payment

Your lender adds the yearly cost of homeowners, wind and flood insurance to your monthly payment, along with principal, interest, taxes and any HOA dues. It then checks that total against your income. So a bigger insurance bill does two things at once: it raises your payment, and it shrinks the loan you qualify for.

The simple rule: every $1,200 a year of insurance adds $100 a month to your payment.

Three sample insurance bills, same buyer, same 7.40% sample rate:

2. The three layers of coastal coverage

A coastal home is usually protected by up to three separate pieces of insurance. Sometimes one company sells two of them together. In the Keys it is common to have three different bills.

The hurricane deductible is the number to watch

Florida insurers must offer hurricane deductibles of $500, 2%, 5% or 10% of the dwelling coverage, with some exceptions at higher coverage amounts. It applies once per calendar year across hurricanes with the same insurer. Here is what the percentage means in real dollars:

A bigger deductible lowers the premium, but for most conventional loans Fannie Mae and Freddie Mac cap the deductible at 5% of the dwelling coverage. So the 10% option may not be allowed with your loan. Ask your lender before you pick one.

One 2026 change in your favor: since March 18, 2026, Fannie Mae and Freddie Mac accept a roof insured at actual cash value (the depreciated value) instead of full replacement cost. That can lower the premium. The trade off: after a roof claim you pay the depreciation yourself.

3. Your step by step timeline

This is the order that keeps you out of trouble. The day counts below use the standard Florida Realtors/Florida Bar AS IS contract defaults. Your agent can confirm what your contract says.

1. Before you write the offer Get a first read on flood and insurance. Look up the flood zone, ask the listing agent for the seller's insurance declarations pages and any elevation certificate, and ask for a rough insurance quote on the address. Read the seller's flood disclosure (Florida law requires it at or before the contract is signed). Run the payment with insurance in it, not without.
2. Days 1 to 15: the inspection period Order the inspections insurers use, then get written quotes. Ask your inspector for a 4-point inspection (roof, electrical, plumbing, heating and cooling; Citizens requires one on homes over 20 years old) and a wind mitigation inspection on the current state form (Rev. 04/26, required for inspections done on or after April 1, 2026). Send both, plus the elevation certificate, to an insurance agent and get written quotes for wind, homeowners and flood. If the numbers do not work, the inspection period is when you can still walk away and keep your deposit.
3. Within 20 days Use the flood zone clause if you need it. The standard contract lets a buyer cancel within 20 days if the home is in a high risk flood zone, sits below the required flood elevation, or cannot get flood insurance. After that, you are treated as accepting the flood zone and elevation.
4. At least 1 to 2 weeks before closing Bind the policies. "Binding" means the policy is officially issued and starts on your closing date. Your lender needs proof (a binder or declarations page and paid receipt) before closing. Federal flood insurance normally has a 30-day wait, but the wait is waived when you buy it as part of a new loan. Many private flood policies have their own waiting period, so ask.
5. Any time a storm threatens (hurricane season runs through November 30) Expect a binding freeze. When the National Weather Service issues a tropical storm or hurricane watch or warning for any part of Florida, Citizens stops issuing new policies statewide until the threat passes. Private insurers have similar rules. If your coverage is not bound yet, your closing waits. The standard contract extends closing up to 7 days after insurance becomes available, and either side can cancel if the problem still blocks closing more than 30 days past the closing date. This is why you bind early.

4. Questions to ask the seller (copy and send)

Why question 2 matters most: an NFIP flood policy can be handed to the buyer, and it keeps its current price path. Increases are capped by law at up to 18% a year for a primary home and 25% for a second home or rental. A brand new policy is priced at today's full rate instead. On an older Keys home the difference can be thousands of dollars a year.

What Florida sellers must disclose: since October 1, 2025, the seller's flood disclosure must say whether the seller knows of flood damage during their ownership, whether they filed a flood claim with any insurer (including the NFIP), and whether they received flood help from any source (including FEMA). It only covers what the seller knows during their own ownership, so still check the elevation certificate and claims history yourself.

5. Red flags and green flags

6. Waterfront and Keys specifics

V zones and AE zones

Zones that start with A or V are FEMA's high risk flood zones, and nearly every mortgage on a home in one of them requires flood insurance. V and VE zones face waves on top of rising water, which usually means stricter building rules and higher premiums. AE zones have a set flood elevation without strong wave action. Under FEMA's current pricing (Risk Rating 2.0), the zone alone no longer sets the price. Elevation, distance to water, flood history and rebuilding cost all count.

The space under an elevated home

Many Keys homes sit on pilings or a raised first floor. The ground level below can only be used for parking, access and storage. Flood insurance covers very little down there: mostly equipment like the water heater and electrical service, not finished walls, flooring or belongings. If a previous owner turned it into a bedroom or apartment, it may be unpermitted, and it can raise flood premiums or create code problems later.

Docks, seawalls and boat lifts

The federal flood policy does not cover docks, piers, seawalls, bulkheads or boat lifts. Ask your agent whether the homeowners or wind policy covers them, and for how much. Many policies limit or exclude them. A seawall repair can be one of the biggest costs on a canal home.

The 50% rule

If you renovate or repair storm damage and the cost reaches 50% of the building's market value, the whole home must be brought up to current flood rules, which can mean raising it. A Florida law in effect since June 26, 2025 stops local governments from adding up your improvements across several years to reach that 50%. Each project is measured on its own. Check with the building department before you plan a big remodel. Read more in our FEMA 50% rule guide.

When $250,000 of flood coverage is not enough

An NFIP policy covers at most $250,000 for the building and $100,000 for belongings. Many waterfront homes cost more than that to rebuild. Lenders and Citizens accept the NFIP maximum, but you can buy "excess" flood coverage from a private insurer on top of it. Ask for both quotes.

Elevation certificates

An elevation certificate is a surveyor's form showing how high the home sits compared with the expected flood level. It is optional for NFIP pricing but often lowers the premium on an elevated home. Ask the seller first, then the local building or permit office. If none exists, a licensed surveyor can produce one.

7. Buying a condo

Condo insurance comes in two parts. The association's master policy covers the building. Your HO-6 policy covers your unit's interior, your belongings, and your share of any association deductible or assessment. Before you commit:

• You have 7 business days to cancel after signing and receiving the condo documents on a resale. That changed from 3 days on July 1, 2025. Use the time to read the insurance, budget and reports below.
• Read the master policy declarations. Check the wind deductible and whether the building carries flood insurance. For conventional loans the per unit share of the master deductible can be no more than $50,000, and your HO-6 deductible no more than 5% or $2,500, whichever is greater.
• Ask for the milestone inspection summary and the structural integrity reserve study (SIRS). Buildings three stories or taller need a milestone inspection at 30 years (some local governments require it at 25). Buildings of three stories or more also need a structural integrity reserve study. Most were due by December 31, 2025, and December 31, 2026 is the absolute last date. Ask for a copy.
• Ask your lender to check the building early. Fannie Mae will not back loans in a building with critical repairs, a failed milestone inspection, or more than $10,000 per unit in unfunded repairs due within 12 months. Starting with applications on or after January 4, 2027, Fannie Mae and Freddie Mac require the association to put at least 15% of its budget toward reserves, up from 10%, unless it has a reserve study from the last 3 years and funds reserves at the level the study recommends. A building that misses these rules is "non-warrantable" and needs a different kind of loan. See our non-warrantable condo guide.
• Good news: the Citizens flood requirement does not apply to condo unit (HO-6) policies.

8. Buying a rental or second home

• Rentals need a landlord policy (usually a form called DP-3), not a regular homeowners policy. Most standard policies exclude short-term rental use, so an Airbnb or VRBO home needs coverage written for that use. Platform host protection is not a substitute.
• Many investor lenders require rent loss coverage, often about 6 months of rent.
• Insurance hits investor loans directly. A DSCR loan (debt service coverage ratio) qualifies you on the rent compared with the full payment, including insurance. A higher premium can push a property below the lender's minimum. Try our DSCR calculator.
• Second homes face faster increases. NFIP flood premiums on non-primary homes can rise up to 25% a year, compared with 18% for a primary home.

9. Dates coming up

• Now to Nov 30, 2026Hurricane season. Binding freezes can happen any time a storm threatens Florida.
• Dec 11, 2026NFIP deadline. Congress extended federal flood insurance only to this date. If it lapses, no new NFIP policies or renewals can be issued, and closings that need one can stall. It lapsed for 43 days in fall 2025. Existing policies stay in force and can still be assigned to a buyer, and private flood insurance is not affected. Closing in December? Bind early and get a private flood quote as a backup.
• Dec 31, 2026Absolute last date for condo buildings of three stories or more to finish their structural integrity reserve study. Most were due a year earlier.
• Jan 1, 2027Every new or renewing Citizens home policy with wind coverage must carry flood insurance, whatever the home's value or flood zone. Condo unit (HO-6) and renter policies are exempt. Homes in high risk zones already needed it; this last step reaches lower risk homes valued under the earlier dollar thresholds.
• Jan 4, 2027Fannie Mae and Freddie Mac raise the minimum condo reserve to 15% of the budget for new loan applications.
• Feb 19, 2027New FEMA flood maps take effect for unincorporated Miami-Dade and 34 cities, including Miami Beach, Key Biscayne and Surfside. Check whether a home's zone is changing before you buy.
• Date not announcedFEMA is redrawing Monroe County's preliminary flood maps from scratch. Local reporting says a change in how elevation is measured adds about 1.5 feet to required elevations in most of the county. There will be a 90-day appeal period when they come out.
• Around Dec 2026 to mid 2027Citizens' 2027 rates. For 2026, Citizens cut its multiperil homeowners rates by an average of 8.8% statewide and its wind only rates by about 5%, applied at renewal. Nothing has been proposed or approved for 2027 yet.

10. Ways to lower the bill

• Keep the seller's NFIP flood policy if it is cheaper than a new one (ask for the assignment in writing).
• Get a wind mitigation inspection. It is valid for 5 years and often costs about $75 to $150. Florida insurers must give credits for features like hurricane straps, a hip roof and impact openings.
• Use the elevation certificate to show the home sits high.
• Compare private flood and NFIP, but know the catch: time spent on a private policy does not count as continuous NFIP coverage, so switching back later can cost you the discounted price path.
• Shop the wind and homeowners coverage. Citizens cannot insure you if a private insurer offers comparable coverage for no more than 20% above the Citizens price. The private market is also improving: 21 new companies have been approved to write Florida homes since the 2022 to 2023 reforms, and many have filed rate cuts.
• Check My Safe Florida Home. The state program offers free inspections and grants of up to $10,000 for hardening upgrades on eligible homesteaded homes. Grants are now limited to low and moderate income homeowners (moderate income owners put in $1 for every $2 from the state), with priority windows for owners 60 and older. Funding opens and closes, so check mysafeflhome.com for current status.

Your community's flood insurance discount

Communities that go beyond FEMA's minimum rules earn a discount on NFIP flood premiums for most policies in town (FEMA's Community Rating System). Policies already at a rate cap may get a smaller discount or none. Current discounts as of October 1, 2026:

11. For Realtors: how to use this guide

Questions buyers ask

Plain English glossary

Go deeper

Sources

Every rule and date on this page was checked against these sources on October 18, 2026.

• Congressional Research Service, NFIP reauthorization status (R44593, Oct 5, 2026)
• Public Law 119-103, Continuing Appropriations and Extensions Act, 2027
• Citizens Property Insurance: flood insurance requirement
• Florida Statutes 627.351(6)(aa): Citizens flood requirement
• Citizens: 2026 multiperil rates drop statewide (Mar 4, 2026)
• Citizens: binding suspensions during storms
• Citizens: inspection requirements (4-point and roof)
• Citizens: wind mitigation form changes (Rev. 04/26)
• Florida OIR insurance market stability report, July 2026
• Florida Statutes 627.701: hurricane deductibles
• Florida Statutes 627.7011: roof age and law and ordinance coverage
• Florida Statutes 689.302: seller flood disclosure
• Florida Statutes 163.31795: 50% rule lookback limits
• Florida Statutes 718.503: condo resale documents and 7 day cancellation
• Florida Statutes 718.112: structural integrity reserve study
• Florida Statutes 553.899: milestone inspections
• FloodSmart: buying a policy, coverage limits and waiting period
• FEMA Community Rating System eligible communities, Oct 1, 2026
• Federal Register: final flood hazard determinations, Miami-Dade (Oct 14, 2026)
• KeysNews: FEMA to draft new flood maps for Monroe County (Sept 11, 2026)
• GAO: flood insurance and the private market (GAO-27-108012)
• Fannie Mae Selling Guide B7-3-02: property insurance, 1 to 4 units
• Fannie Mae Selling Guide B7-3-03: master policy and HO-6
• Fannie Mae Selling Guide B4-2.1-03: ineligible condo projects
• FHFA: Fannie Mae and Freddie Mac remove certain insurance requirements (Mar 18, 2026)
• Florida Realtors: FR/BAR AS IS contract update (Feb 2026)
• Freddie Mac weekly mortgage rate survey, Oct 15, 2026
• My Safe Florida Home program