Blog · October 14, 2026 · Texas
Tom Green County Flood Zone Map, Texas
Look up any Tom Green County address on FEMA's flood map, read the zone, and match it to the parcel record for land around Christoval.
Main page: Tom Green County, TX GIS & Parcel Viewer (official map link, Tom Green County facts and neighboring maps).
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The Tom Green County flood zone map question tends to arrive at a bad moment: a lender's letter, an insurance quote, or a permit counter in Carlsbad. Here's how to read FEMA's map for a Tom Green County, TX property and match it to the parcel record.
The sections below go from the FEMA search to the Tom Green County parcel record, then cover insurance, permits and map changes near San Angelo.
How to use the Tom Green County flood zone map
FEMA's official flood maps for Tom Green County are free at the FEMA Flood Map Service Center. The site returns the effective Flood Insurance Rate Map (FIRM) panel covering that San Angelo location, which you can view or download. If the PDF panel for Tom Green County is hard to read, try FEMA's National Flood Hazard Layer viewer, so you can see whether the shading reaches a house near Carlsbad. Next, the Tom Green CAD interactive map confirms which Tom Green County parcel you're looking at. Match the Tom Green County lines and acreage to the FEMA view, since flood maps don't draw property lines in detail.
Step one: the free Tom Green County viewer
Tom Green County publishes its parcels on the Tom Green CAD interactive map, which runs on a BIS Consulting map viewer, free to use for a lot in Christoval or a tract around San Angelo. Rural accounts near San Angelo list an abstract in the legal description; copy it with the county property ID. For a backup route to the map covering San Angelo, our Tom Green County directory entry keeps the link current.
Tom Green County at a glance
Courthouse business for Tom Green County runs through San Angelo. Unincorporated communities in the county, including Carlsbad, Christoval, and Grape Creek, display up as small groups of parcels along the roads. Census Bureau estimates put Tom Green County at about 119,057 residents in 2023 on about 1,522 square miles of land. Platted neighborhoods near San Angelo give way to rural acreage elsewhere in the county.
Tom Green County land records
Deeds and plats behind the Tom Green County map are kept by the county's recording office; the official Tom Green County website names which office that is. Like every Texas county, Tom Green County has its own appraisal district; it values property for all the local taxing units, while each unit sets its own rate. Copy the parcel number and legal description from the county record well before you request a deed for land near Carlsbad.
High, moderate and minimal risk in Tom Green County
On the FIRM covering Tom Green County, zones that start with A or V are Special Flood Hazard Areas, defined by a 1-percent annual chance of being flooded. Where a Tom Green County tract displays Zone AE, there's a base flood elevation to compare a building against; in Zone A there is not one. Land near Carlsbad in shaded X (Zone B on older maps) sits in the moderate band between the 100-year and 500-year floods. Unshaded X (or C) on the Tom Green County panel means minimal risk.
Waterfront parcels near Carlsbad
Parcels touching Lake Nasworthy, Twin Buttes Reservoir and Concho River deserve a FEMA check before anything else in Tom Green County. On many parcels near San Angelo, the zone covers the low ground by the water while the homesite near the road is outside it. A creek near Carlsbad that displays no detailed zone, which is why it's worth walking the ground after a heavy rain.
Insurance, permits and map changes
Insurance is the practical stake for a Tom Green County buyer. If a barn or house outside San Angelo is mapped in a high-risk zone and is financed by a regulated or federally insured lender, federal rules call for flood insurance under the Flood Disaster Protection Act, wherever the community joins the NFIP. In Zone X near San Angelo, insurance is a choice, not a mandate; pricing a policy for land near Carlsbad is still worth a call. If a building near Carlsbad sits above the flood line, a Letter of Map Amendment request is the formal route, supported by elevation data from a professional surveyor. Adding on to a house near Carlsbad inside the zone usually needs a floodplain permit, and the building office serving Carlsbad explains the steps.
Questions about the Tom Green County flood zone map
Can I build in a flood zone in Tom Green County?
Building in a Special Flood Hazard Area near Christoval usually needs a floodplain permit and may require elevating the structure, so check with the county floodplain administrator.
Is my Christoval address in a flood zone?
Look it up at FEMA's Flood Map Service Center, then match the parcel lines in the Tom Green CAD interactive map; for land near Carlsbad, a zone starting with A or V is high risk.
Is flood insurance required for a Zone X lot in Christoval?
FEMA doesn't require it for a Zone X lot in Christoval, but coverage is available and some lenders ask for it.
Where do I get an elevation certificate in Tom Green County?
Hire a professional surveyor or engineer who works in Tom Green County; ask the local floodplain office first in case one exists.
Does a 100-year floodplain near Carlsbad flood only once a century?
Not at all; a county tract in that zone carries a 1-in-100 chance in any single year, and two floods in one decade near Christoval are possible.
What does BFE mean on the flood map for Christoval?
On the map covering Christoval, the BFE is the height floodwater is expected to reach in the 1-percent-annual-chance flood, and a surveyor compares the building near Christoval to it.
Open the official Tom Green County, TX parcel map Tom Green County in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.