Flood Risk

The Navasota River Floods — Know Your Property's Risk

The Navasota River runs through Grimes County and can rise quickly during heavy rain, putting roads and low-lying properties at risk.

Grimes County Home & Property

The Navasota River can rise several feet in just a few days. Heavy rain is all it takes. In May 2024, several county roads flooded. That kind of flooding is normal here. The river drains a large area and rises fast.

Buying or building near the river? Check your flood risk first. Go to the FEMA Flood Map Service Center and search your address. It will tell you if your land is in a flood zone. Land in the 100-year floodplain may need flood insurance. That is often required if you have a federally backed mortgage.

Inside Navasota city limits, contact Navasota's floodplain office with questions. On unincorporated county land, call Grimes County emergency management at 936-873-4404.

Source to confirm: FEMA Flood Map Service Center

More Grimes County notes

Property Tax

Two Offices Handle Your Property Tax in Grimes County

Grimes County uses two separate offices for property tax work. Knowing which one to call will save you time.

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Homestead Exemption

Homestead Exemption Cuts Your School Tax Bill in Grimes County

Homeowners who live in their home can apply for a homestead exemption that reduces how much of the property value is taxed.

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Agricultural Valuation

Farmland and Ranchland Can Be Taxed on Productivity, Not Market Value

In Grimes County, land used for farming, ranching, or timber can be taxed on what it produces rather than what it could sell for.

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Septic / OSSF

Most Rural Homes in Grimes County Use a Septic System

Outside of Navasota and other small towns, most Grimes County homes are not on a public sewer line. They use a septic system instead.

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