Looking for a sinkhole investigation in Sebastian, FL? Describe your project once and up to five geotechnical engineers who work in Sebastian and Indian River County get back to you with a quote. It's free and there is no obligation.
Sebastian is home to about 27,087 people (2024 Census Bureau estimate), a growing community (+8.2% since 2020). With 1,557 people per sq mi, it is a suburban area. Karst geology makes sinkhole activity a real concern for some properties here.
Sebastian at a glance
- Population (Census Bureau estimate, 2024)
- 27,087 (+8.2% since 2020)
- Rank in Florida
- 101st of 411 cities and towns
- Land area
- 17 sq mi
- Population density
- 1,557 people per sq mi (suburban)
- Type
- City (Sebastian city)
- Main county
- Indian River County
What to check before hiring in Sebastian
- License: in Florida, investigations are signed by a licensed engineer or geologist.
- Insurance: read your policy's sinkhole and ground collapse wording before you file.
- Report: ask for radar results, boring logs and clear conclusions.
- Price drivers: site size, number of borings and testing.
Useful official resources
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USGS: sinkholes
Official information and guidance.
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Florida Office of Insurance Regulation
Official information and guidance.
Services available in Sebastian
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Sinkhole investigation
Geotechnical investigation with ground penetrating radar and borings, and an engineer's report.
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Sinkhole repair design
Engineering design and oversight of grouting or underpinning repairs.
Frequently asked questions in Sebastian
How much does a sinkhole investigation cost in Sebastian, FL?
It depends on the site and the testing. Describe your property: engineers who serve Sebastian reply with a quote.
How long does it take?
Often a few weeks including field work and report.
Can a sinkhole be repaired?
Often yes, by grouting or underpinning designed by an engineer.
Which geotechnical engineers will contact me?
Up to five independent geotechnical engineers who serve Sebastian and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.