Yes, 811 does locate on private property. When you place a request, locators from each utility company come onto your land and mark their buried lines with paint or flags. The catch is what they will not mark: anything you or a previous owner installed on your side of the meter or property line. Those private lines stay invisible unless you hire someone else to find them.
Where the Utility’s Job Ends
Contacting 811 notifies every public utility with infrastructure near your dig site, and each one sends a locator to mark its buried lines on the surface. The service covers gas mains, electric feeds, water mains, sewer trunks, and telecommunications cables. It is free, and federal law requires every state to maintain a one-call notification system under the Pipeline Safety Act.
The detail that trips homeowners up is the point of demarcation. Utility companies own and maintain their lines up to a specific handoff, usually the meter or the property boundary. Everything on your side of that point belongs to you. When a locator finishes, the marks show where the utility’s lines run, not everything that sits underground in your yard. Treating those marks as a complete map is the most common mistake people make before digging.
Private Lines 811 Will Not Mark
Private utility lines are anything installed, owned, or maintained by the property owner rather than the utility company. They are more common than most homeowners realize, especially on older properties where additions and landscaping have accumulated over the years. The typical ones include:
- Irrigation and sprinkler supply lines running from the water meter to sprinkler heads throughout the yard
- The private sewer lateral connecting your home to the public sewer main, which is your responsibility in most jurisdictions
- Electrical wiring feeding detached garages, workshops, pool houses, or landscape lighting
- Propane and fuel lines running from a private tank to the home or outdoor appliances
- Communication wiring for security systems, outdoor speakers, or internet to secondary structures
If a pool, hot tub, outdoor kitchen, or detached building has ever been added to the property, private lines were probably buried during that work. Previous owners may have installed lines you have no records of. None of it shows up on an 811 ticket.
How to Find Private Lines
Since 811 will not cover private infrastructure, you need another method. The most reliable option is hiring a private utility locating company. These firms use ground-penetrating radar and electromagnetic locators to detect both metallic and non-metallic lines. Ground-penetrating radar sends pulses into the soil and reads the reflections to identify buried objects regardless of material. Electromagnetic locators trace conductive lines like electrical cables and metal pipes. A professional locate typically covers the whole property and produces surface markings plus a digital map showing line positions and depths.
Pricing varies by property size and complexity, so expect to request a quote rather than finding a standard rate. The cost is easy to justify against the alternative: a single utility strike averages tens of thousands of dollars in repairs, delays, and liability.
Property records can supplement a professional locate. “As-built” drawings from your home’s construction or renovation may show where private lines were installed, and your county building department sometimes keeps these on file. Surface clues help too. Valve boxes, irrigation heads, cleanouts, and conduit risers all suggest lines running underground nearby. None of these replace a professional locate, but they tell you what to expect before the locator arrives.
Once private lines are marked, treat them exactly like public ones. There is no tolerance-zone exception because a line belongs to you. Hitting your own gas or electrical line is just as dangerous as hitting the utility’s.
You Still Have to Call 811
The limits of 811 are not a reason to skip it. Every state requires you to contact 811 before digging, and that includes homeowners doing their own yard work. There is no do-it-yourself exemption. Planting a tree, installing a fence, or building a deck all count, and the law applies to you the same way it applies to a commercial excavator.
You can reach 811 by dialing the number or submitting the request online through your state’s one-call center. Online submission is often faster during busy construction seasons when the phones back up. You provide the dig location, the type of work, and your planned start date.
Utility companies then have a set number of business days to respond and mark their lines. The standard wait is two to three business days in most states, and some require a full three business days before you can break ground. Do not start digging early even if some marks appear right away. All responding utilities need the full window to finish.
Locate tickets expire. Most states set an expiration of 10 to 14 calendar days from when the ticket is processed. If your project runs longer, call in a renewal before the ticket lapses. Marks fade, get disturbed by weather, or become unreliable as time passes. Renewing is free and takes only a few minutes.
Penalties and Liability for Skipping 811
Federal law requires every state to operate a one-call notification system, and every state has enacted its own damage-prevention statute with enforcement teeth.1Office of the Law Revision Counsel. 49 U.S. Code 60114 – One-Call Notification Systems The consequences of digging without a locate ticket hit from several directions at once.
Civil penalties for failing to notify 811 before digging vary by state but commonly run from a few hundred dollars to $10,000 per violation. Federal pipeline safety penalties can go much higher for incidents involving pipeline infrastructure. Beyond fines, you are liable for the full cost of repairing whatever you damage. That covers the physical repair, interrupted service to other customers, emergency response, and any construction delays the strike causes. Combined, these costs routinely reach five figures for a single incident.
The picture gets worse if someone is hurt. Skipping 811 makes it very difficult to argue you exercised reasonable care, which is the standard most state statutes use to allocate fault. Your homeowner’s insurance may deny a claim if you bypassed the legally required locate process, leaving you personally responsible for damages. If a utility company fails to respond to your locate request and you damage an unmarked line while digging carefully, most state laws shift liability to the non-responding utility. That protection disappears entirely if you never filed the ticket.
So the answer to whether 811 comes onto private property is yes, and using the service is required. Just understand what you are getting: a map of the utility’s lines, not a map of your yard. Anything installed on your side of the meter needs a separate call to a private locator before the shovel goes in the ground.