Texas Porch

Flood Risk

FEMA Updated Flood Maps for Parts of Collin County

FEMA has issued preliminary updated Flood Insurance Rate Maps for several Collin County cities and unincorporated areas — check whether your property's flood zone changed.

Collin County Home & Property

FEMA prepares Flood Insurance Rate Maps (FIRMs) that show which areas have the highest risk of flooding. Preliminary maps announced in May 2026 cover parts of Allen, Lowry Crossing, Lucas, McKinney, and Princeton, the towns of Fairview and New Hope, and unincorporated Collin County. Properties in a Special Flood Hazard Area (SFHA) typically must carry flood insurance if they have a federally backed mortgage.

Flood maps can change over time as development, drainage improvements, and updated hydrology data are taken into account. Use FEMA's Flood Map Service Center at msc.fema.gov to check the current zone for any specific address. You can also view the county's floodplain resources through the Collin County GIS portal at gis.collincountytx.gov.

Source to confirm: FEMA Flood Map Service Center

More Collin County notes

Property Tax Relief

How the Homestead Exemption Lowers Your Property Tax Bill

If you own and live in your home in Collin County, you can apply for a homestead exemption that removes part of your home's value from the tax calculation.

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Property Tax Basics

Two Offices Handle Property Taxes in Collin County

Two separate offices deal with your property taxes. One sets your home's value. The other sends your bill and collects payment.

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Agricultural Appraisal

Land Used for Farming Can Be Taxed at a Much Lower Rate

Texas law lets land used for farming be taxed on its farming value, not its full market value. This can sharply lower the tax bill.

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Special Districts

Many New Subdivisions Have an Extra Tax Line for a MUD or PID

Many new neighborhoods in Collin County have an extra charge on top of regular property taxes. It pays for water lines, roads, and parks built by the developer.

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