Looking for a sinkhole investigation in Allen, TX? Describe your project once and up to three geotechnical engineers who work in Allen and Collin County get back to you with a quote. It's free and there is no obligation.
Allen is home to about 113,746 people (2024 Census Bureau estimate), a growing community (+8.7% since 2020). With 4,308 people per sq mi, it is a densely built-up area. Karst geology makes sinkhole activity a real concern for some properties here.
Allen at a glance
- Population (Census Bureau estimate, 2024)
- 113,746 (+8.7% since 2020)
- Rank in Texas
- 37th of 1,224 cities and towns
- Land area
- 26 sq mi
- Population density
- 4,308 people per sq mi (densely built-up)
- Type
- City (Allen city)
- Main county
- Collin County
What to check before hiring in Allen
- License: in Texas, 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 Allen
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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 Allen
How much does a sinkhole investigation cost in Allen, TX?
It depends on the site and the testing. Describe your property: engineers who serve Allen 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 three independent geotechnical engineers who serve Allen 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.