Flood insurance: how it works, what it costs and when to buy
Homeowners and renters policies almost never cover damage from flooding, whether from a river, storm surge or heavy rain pooling around the house. Flood cover is bought separately, from the National Flood Insurance Program (NFIP) or from a private insurer. Because new policies usually have a waiting period, the time to buy is before you need it.
What counts as a flood
For insurance purposes, a flood generally means water covering normally dry land, for example from an overflowing river, coastal storm surge, or rain that cannot drain away fast enough, often affecting two or more properties or a wide area. Water damage from a burst pipe or a leaking roof is not a flood; your homeowners or renters policy handles that.
NFIP cover at a glance
- Building cover: up to $250,000 for a home’s structure and systems.
- Contents cover: up to $100,000 for belongings, bought separately.
- Renters can buy contents-only cover.
- Waiting period: a new policy normally starts 30 days after purchase. The main exception is a policy bought as part of a mortgage closing.
- Increased Cost of Compliance (ICC): up to $30,000 toward elevating, relocating or demolishing a home that local rules require you to bring up to code after a flood. It counts within the $250,000 building limit.
NFIP policies are sold through regular insurance agents, and the price is the same whichever agent you use.
How NFIP pays claims
The NFIP’s summary of coverage sets out two important rules:
- Contents are always paid at actual cash value, meaning replacement cost minus depreciation.
- The building is paid at replacement cost only if it is a single-family home you live in as your main residence and you insure it for at least 80% of its full replacement cost (or the program maximum). Otherwise, the building is also paid at actual cash value.
Basements and areas below the lowest elevated floor have limited cover. Building systems such as furnaces, water heaters and electrical panels are generally covered there, but finished walls, flooring and most belongings in a basement are not.
Private flood insurance
Private flood policies can offer higher limits, shorter waiting periods, and extras such as living expenses while you are displaced or broader cover for basements. In some areas they cost less than the NFIP; in others more, or the insurer will not write the risk. Private cover is also unaffected when the NFIP’s authority lapses in Congress, which has happened several times and can pause new NFIP policies.
Do you need it?
Lenders require flood insurance for federally backed mortgages on homes in high-risk flood zones. Outside those zones it is optional, but floods often hit homes outside mapped high-risk areas, and maps can be out of date. Check your property’s flood risk and history, not just the zone on the map, and ask neighbors whether streets or basements have flooded before.
What drives the price
NFIP prices now reflect each home’s individual risk: distance to water, elevation, flood frequency, flood type and the cost to rebuild. That means two homes in the same zone can pay very different amounts. Elevating utilities, installing flood vents, filling in a basement and holding an elevation certificate can lower the price.
Ways to keep cost down
- Choose a higher deductible, if you could pay it after a flood.
- Insure contents and building separately at amounts that match your needs.
- Ask whether your community participates in the Community Rating System, which can discount NFIP policies for residents.
- Compare a private quote alongside the NFIP price.
When to buy
Buy well before storm or snowmelt season because of the 30-day wait. If you are buying a home, arrange flood cover early so it does not hold up the closing.
Getting a quote
Any agent who sells homeowners insurance can usually quote an NFIP policy. Have your address, the year the home was built, the number of floors, whether there is a basement or crawlspace, and an elevation certificate if you have one. Ask for both building and contents quotes, and request a private flood quote at the same time so you can compare limits, waiting periods and price.
After a flood
Photograph the damage before cleaning up, make a list of damaged items, keep samples of damaged materials such as carpet, and contact your agent or insurer as soon as you can.
Common questions
Does homeowners insurance cover any flood damage?
Standard homeowners policies exclude flood. Some cover limited water damage from other causes, such as a burst pipe.
Can I buy flood insurance right before a storm?
You can buy it, but the 30-day waiting period means a new NFIP policy will not cover that storm in most cases.
Do renters need flood insurance?
Renters can buy contents-only flood cover. The landlord’s policy covers the building, not your belongings.