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*The Angi rating for Land Surveying companies in O Fallon, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Land Surveying needs.

*The HomeAdvisor rating for Land Surveying companies in O Fallon, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Land Surveying needs.

Last update on October 09, 2025

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Land Surveying questions, answered by experts

Prior to excavation, you should prepare the dig site and call 311 before you sign anything.

To get your site ready for excavation, you should move anything in the area that isn’t affixed to the land. You can save money on the excavation by removing hardscaping, including walkways, decks, concrete patios, and paver patios.

Before you carry out any digging, you should call 311 to confirm that there are no utility lines running through your excavation site. Skipping this step could lead to severe injury and property damage if your excavator hits a water, sewage, or gas line.

If you can’t find any records online, you’ll need to contact your county clerk’s office to do further research. They should have property records on file, or can at least point you in the right direction of who to contact. You can also speak with your neighbors about when their houses were built because they were likely built around the same time.

Yes, they assess topography and potential risks related to flooding.

Yes, new home construction will always require building permits, no matter where you live. In most cases, you’ll need a general construction permit, along with plumbing and electrical permits for the utility lines in your home. Depending on where you live, you’ll likely find that you also need permits for things like connection to a sewage system or installing exterior components, like decks, driveways, patios, and curb cutouts. Leave navigating the permits required for new home construction to a professional to ensure your home is built legally and safely.

Property lines, building locations, and potential encroachments are mapped.

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The O Fallon, MO homeowners’ guide to land surveying services

From average costs to expert advice, get all the answers you need to get your job done.

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