Elevation Certificates in Hays County, TX (2026)
Hays County's rapid growth along the I-35 corridor and its beautiful Hill Country terrain come with a significant trade-off: flood risk. The Blanco River, Onion Creek, Barton Creek, Cypress Creek, and other Hill Country waterways can rise quickly during intense storms. The Memorial Day floods of 2015 caused catastrophic damage in Wimberley, permanently raising awareness of flood risk in the county. For property owners in or near FEMA flood zones in Hays County, an elevation certificate is a critical document.
What an Elevation Certificate Does
An elevation certificate is a FEMA-standardized form completed by a licensed surveyor or engineer that records your building's elevation, including the lowest floor, relative to the Base Flood Elevation (BFE) on the applicable FEMA flood map. The BFE is the water surface elevation expected during a 100-year flood event at your location.
Flood insurance companies use the elevation certificate to calculate your premium. If your building is above the BFE, your rate is lower. If it is below, your rate is higher. An elevation certificate makes that relationship official.
Flood Risk Areas in Hays County
Blanco River and Wimberley
The Blanco River is Hays County's most flood-prone waterway. The Memorial Day 2015 flood sent a wall of water through Wimberley that caused massive destruction and loss of life. FEMA has updated flood maps extensively in this area. Properties along the Blanco River in Wimberley and upstream should verify their current flood zone status and consider an elevation certificate if they fall in Zone AE.
Onion Creek
Onion Creek drains the northern portions of Hays County and eastern Travis County. Properties in the lower Onion Creek corridor have significant flood exposure. The creek's watershed is subject to rapid runoff from impervious cover in the growing Austin area to the north.
Barton Creek
Barton Creek runs through northern Hays County and into Austin. Properties along Barton Creek and its tributaries, particularly in the Dripping Springs area where the creek's headwaters originate, may have flood zone exposure.
Cypress Creek
Cypress Creek, which flows through the Wimberley Valley before joining the Blanco River, has its own FEMA flood mapping and affects properties throughout the Wimberley area.
When to Get an Elevation Certificate in Hays County
- Your property is in a FEMA Special Flood Hazard Area (Zone AE, A, or AO)
- Your lender requires flood insurance as a loan condition
- You are applying for a building permit in a flood zone area of Hays County
- You want to apply for a Letter of Map Amendment (LOMA) to challenge your flood zone designation
- You are buying a property near a waterway and want to estimate future flood insurance costs
Elevation Certificate Costs in Hays County
| Property Type | Typical Cost Range |
|---|---|
| Standard single-family home | $400 to $650 |
| Larger residential or rural property | $550 to $800 |
| Commercial property | $800 to $2,500+ |
How to Get an Elevation Certificate
- Step 1: Check your flood zone at msc.fema.gov to confirm you are in or near a mapped flood zone.
- Step 2: Look up your parcel at hayscad.com for your parcel ID and legal description.
- Step 3: Contact a licensed RPLS and provide your address, parcel ID, and the purpose of the certificate.
- Step 4: The RPLS visits the site, measures building elevations, and completes the FEMA form.
- Step 5: You receive a sealed certificate to provide to your insurer, lender, or permit office.
Find an Elevation Certificate Surveyor in Hays County
Our directory includes licensed RPLS professionals serving San Marcos, Kyle, Buda, Wimberley, Dripping Springs, and all of Hays County. Whether your property is along the Blanco River, near Onion Creek, or anywhere else in the county where flood zones are a factor, browse listings to find a qualified surveyor today.