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How to research flood risk before buying a Kingwood home

Quick answer. Look the address up on FEMA’s Flood Map Service Center and Harris County’s flood tools, read the seller’s disclosure (Texas Property Code §5.008), ask about past flooding and claims, and get a flood insurance quote during your option period. Risk varies by property, and FEMA reports almost one-third of flood claims from 2014 to 2024 came from outside high-risk zones.

By Michael O'Neal, Broker and REALTOR®, Keller Williams Realty Northeast
Published October 12, 2026

Step by step: the official tools

1. FEMA Flood Map Service Center: The 'official public source for flood hazard information produced in support of the NFIP'; search by address, place or coordinates for the effective FIRM and print a FIRMette.
2. Harris County Flood Education Mapping Tool (HCFCD): Shows FEMA-mapped floodplains relative to homes and structures; HCFCD says it 'is not the effective FIRM' - use msc.fema.gov for the official map.
3. MAAPnext (HCFCD): Next-generation Harris County flood mapping. Map status 'Draft'; draft maps 'are not final, cannot be used for insurance or regulatory decisions'; FEMA preliminary FIRMs and appeal period not yet released (no dates given). Interactive map and 'Know Your Risk' report (report.maapnext.org).
4. Harris County Flood Warning System: Real-time rainfall and stream levels from 201 Harris County gage stations (350+ regionwide); rainfall reported every 0.04 in., stream sensors every 0.10 ft rise; data may lag about five minutes.
5. City of Houston Floodplain Management Office: Issues floodplain development permits for construction in the 500-year floodplain, 100-year floodplain and floodway; handles LOMAs/LOMRs, provides floodplain map and insurance information; 1002 Washington Ave., 3rd floor, 832-394-8854. Kingwood is inside the City of Houston.
6. FloodSmart - What's Your Flood Risk?: FEMA/NFIP explainer: zones A/V are high-risk; B, C, X moderate-to-lower; 2014-2024 claim share outside high-risk areas.
7. HCFCD F-14 Kingwood projects: Project hub for the Kingwood Area Drainage Analysis (contract Aug 13, 2019), the Kingwood Diversion Ditch and the Taylor Gully/Woodridge detention basin.

Why the map is not the whole answer

FEMA: 'From the years 2014-2024, almost one-third of NFIP flood claims came from areas outside of high-risk flood areas' (29%). High-risk zones start with A or V; moderate-to-lower risk are B, C and X. Source

Kingwood High School stayed flooded 11 days in Harvey (5.5 ft at the front), closed seven months, and received a $25.4 million FEMA grant to rebuild. Source

What the seller must tell you

Texas Property Code §5.008 requires sellers of a single-dwelling residential property to give a disclosure notice; its form asks about present flood insurance, prior flooding from reservoir failure or controlled release, water penetration from natural flood events, location in a 100-year or 500-year floodplain, floodway, flood pool or reservoir, prior flood insurance claims (including NFIP) and FEMA/SBA flood assistance. New homes not previously occupied are exempt. Source

The flood questions were added by HB 3815 and SB 339 (86th Legislature), effective September 1, 2019; the section was last amended by HB 697, effective September 1, 2023. Source TREC's Seller's Disclosure Notice is now form 55-1 (TREC lists effective 05/22/2026; replaces 55-0 dated 09-01-2023). The 55-0 form defines a 100-year floodplain as a special flood hazard area with 'a one percent annual chance of flooding, which is considered to be a high risk of flooding' and notes homes in high-risk zones with federally regulated mortgages must carry flood insurance. Source

Insurance timing

FEMA: 'Typically, there's a 30-day waiting period from date of purchase before your policy goes into effect.' Source Get a quote during your option period, and if you will buy coverage, start it so it is in force when you close.

Kingwood drainage projects to know

Projects affecting Kingwood (checked October 12, 2026)
Project	Status
Taylor Gully and Woodridge Village detention	HCFCD's Taylor Gully Channel Conveyance Improvements and Woodridge Stormwater Detention Basin: $29.4 million construction contract, work began July 20, 2026; funded by HUD CDBG-MIT (Texas GLO), TWDB with the City of Houston, EPA/federal Community Project Funding and ~$3.1 million from the 2018 Bond Program. Source
Kingwood Diversion Ditch	Kingwood Diversion Ditch: HCFCD's recommended Alternative 3 (widen channel, new West Fork outfall, replace Kingwood Dr, Walnut Ln and Deer Ridge Estates Blvd bridges) was estimated at $54.5 million and would remove about 69 structures and 223 acres from the 100-year floodplain, reducing risk along Bens Branch; design funded, construction not funded as of March 2024. Source HCFCD's Taylor Gully Channel Conveyance Improvements and Woodridge Stormwater Detention Basin: $29.4 million construction contract, work began July 20, 2026; funded by HUD CDBG-MIT (Texas GLO), TWDB with the City of Houston, EPA/federal Community Project Funding and ~$3.1 million from the 2018 Bond Program. Source
Lake Houston Dam spillway gates	Lake Houston Dam Spillway Improvement Project (City of Houston + Coastal Water Authority): adds 11 gates to raise discharge from 10,000 cfs (four existing small gates, dam built 1953) to 79,000 cfs; $224 million, about $143.4 million secured; timeline: final design and permitting Dec 2026, construction summer 2028 to winter 2030. Source
Lake Houston dredging district	The new Lake Houston Dredging and Maintenance District held its first meeting in late August 2026; its board says it is 'starting from ground zero' (no design, funding or contractors yet). About $175 million has been allocated for Lake Houston dredging since Harvey; the authorizing bill included $50 million in 2025-2026 installments; a funding plan goes to the 2027 Legislature. It cannot levy fees or taxes. Source

Projects reduce risk over time; they do not change the history or risk of a specific lot. Risk varies by property.

Questions I ask on every Kingwood showing

Has the home flooded or taken water in, and when? Any insurance claims?
Is there an elevation certificate?
What is the current flood insurance premium, and is the policy assumable?
How did the street fare in Harvey and in later storms?
Where does the lot drain, and what changed nearby since?

More detail by village: my Kingwood flood and drainage guide.

Buying in Kingwood? Ask Michael about a specific street.

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