Seller guide · 8 min read
Houston flood zones and selling your house.
Flooding is part of Houston's history and its real estate market. Buyers, lenders, and the Texas disclosure form all ask about it. Here's how to find the facts about your property and what they mean for a sale.
Maps
How to check a property's flood zone
FEMA's Flood Map Service Center shows the official flood zone for any address: zones beginning with A or V are Special Flood Hazard Areas (the "100-year" floodplain); X-shaded areas are the 500-year floodplain; unshaded X is minimal risk on the current map. Harris County Flood Control District publishes local mapping and project information as well. Maps are periodically updated — a property's zone can change.
A zone is a map designation, not a history. Many Houston homes outside mapped floodplains flooded in 2017, which is why the disclosure form asks about actual events, not just zones.
Disclosure
What Texas requires you to disclose
The Seller's Disclosure Notice was expanded after Hurricane Harvey. Answer from what you know; "unknown" is acceptable when true.
- Whether the property is in a 100-year or 500-year floodplain, floodway, flood pool, or reservoir
- Whether the property has flooded (from any source), and whether water has penetrated the structure
- Whether you carry flood insurance
- Whether you have received FEMA or SBA assistance for flood damage
- Prior repairs to flood damage and any known unrepaired damage
Effects
How flood status affects a sale
Insurance
Lenders require flood insurance in Special Flood Hazard Areas; premiums depend on zone, elevation, and the property's claim history. Buyers factor this into what they'll pay.
Financing
Some buyers can't or won't finance a home with repeated flooding. That narrows the pool for a traditional sale.
Value
Flood history and zone affect comparable-sales analysis. Documented, permitted repairs help; undocumented or partial repairs hurt.
Cash buyers
We buy homes in floodplains and homes that have flooded, repaired or not. We'll ask for the history and any claim records and price accordingly.
If it flooded
Selling a house that has flooded
Gather what you have: insurance claim records, contractor invoices, permits, elevation certificates, and photos. Disclose the event and the repairs honestly. If repairs were never completed — drywall cut and left, or mold — it's usually better to sell as-is to a buyer who expects it than to attempt partial fixes. If the home has a repetitive-loss history, buyers and insurers will see it, so lead with it.
Paperwork
What documents help a buyer price a flood-zone house?
An elevation certificate is the single most useful document for a house in a mapped floodplain. It records the elevation of the lowest floor relative to the base flood elevation, and insurers and buyers use it to estimate premiums and risk. If you don't have one, check whether a prior owner or the city obtained one; otherwise a licensed surveyor can prepare it.
If you carry a National Flood Insurance Program policy, ask your agent whether it can be assigned to the buyer at closing. NFIP policies can generally be transferred with the property, which gives a buyer a known premium to compare against a new quote. Private flood policies follow their own terms.
Keep the claim history together in one place: dates, amounts paid, and what the money was spent on. A buyer who can see that a 2017 claim paid for a full gut-and-rebuild with permits will price the house very differently from one who only sees that a claim exists.
Rentals
Does a landlord have to disclose flood risk to tenants?
Yes. Texas law requires residential landlords to give tenants a written flood disclosure with the lease, stating whether the landlord knows the dwelling is in a 100-year floodplain and whether it has flooded in the last five years. If you're selling a rental, the buyer will ask for the signed disclosures in the tenant files along with the leases, so pull them together early. Our page on selling a house with tenants covers the rest of that file.
FAQ
Questions sellers ask
Do I have to disclose flooding that happened before I owned the house?
You must disclose what you know. If you know the house flooded under a prior owner, disclose it.
Does being in a flood zone mean I can't sell?
No. Many Houston homes are in mapped floodplains and sell regularly. It affects insurance, financing, and price.
Will you buy a house that flooded twice?
Usually, yes. Repetitive-loss history affects the value, and we'll be straightforward about that.