A professional ground penetrating radar (GPR) survey typically costs between $1,000 and $2,000 per day, with hourly rates ranging from $200 to $400 depending on the provider and project complexity. For smaller jobs like scanning a concrete slab before drilling, you might pay $250 to $300 per hour. Larger projects, such as mapping utilities across an entire construction site, can run $1,000 to $5,000 per day and are usually quoted as a flat project fee.
Hourly vs. Project-Based Pricing
Most GPR providers bill in one of two ways. For smaller, well-defined tasks, they charge by the hour, typically $250 to $300. If you need someone to scan a few concrete walls for rebar before cutting, or locate a buried septic tank in your yard, expect an hourly bill. These jobs often take just a few hours, so total costs can land in the $500 to $1,200 range.
For larger scopes, like mapping an entire site before excavation or surveying several acres for buried features, providers usually offer a flat project-based quote. This gives you a predictable, all-in cost that’s easier to fold into a construction or development budget. The tradeoff is that you won’t get a number until the provider understands exactly what you need, because GPR pricing depends heavily on site-specific variables.
What Drives the Final Price
There’s no universal flat rate for GPR work because several factors can shift the cost significantly in either direction.
Site size is the most obvious variable. A GPR unit covers roughly one acre per day when doing thorough, detailed scanning. A five-acre environmental site, for example, would take about five days of fieldwork at $1,000 to $2,000 per day, putting the total somewhere between $5,000 and $10,000 for data collection alone.
Depth requirements matter because deeper surveys may call for more specialized equipment and greater expertise from the operator. Scanning a concrete slab six inches deep is a straightforward job. Mapping geology or buried structures several feet underground takes more time and more powerful antennas, which increases cost.
Location and accessibility affect logistics. Urban sites with tight access, heavy traffic, or permit requirements add time and complication. Rural sites may involve longer travel for the crew. Either scenario can push the price above baseline rates.
Data interpretation and reporting is a cost that catches some clients off guard. A basic on-site scan where the technician marks locations in real time is the cheapest option. If you need a formal written report with mapped data, 3D imaging, or engineering-grade deliverables, expect to pay more. According to U.S. government guidance on GPR surveys, the daily rate range of $1,000 to $2,000 shifts toward the higher end when detailed data interpretation and a formal report are included.
Common Project Types and Costs
Concrete Scanning
This is one of the most common GPR applications in construction. Crews scan concrete slabs, walls, and floors to locate rebar, post-tension cables, conduits, and voids before any cutting or drilling happens. Daily rates for concrete scanning range from $1,000 to $5,000 depending on the size and complexity of the structure. A small residential job, like scanning a basement floor before installing plumbing, sits at the low end. Scanning multiple floors of a commercial building with post-tension cables and embedded electrical conduits pushes toward the high end.
Utility Locating
Before excavation, GPR can map underground pipes, cables, and other utilities that might not appear on existing records. This work is typically billed hourly for small lots or as a project fee for larger sites. Consulting fees for this type of work generally fall in the $200 to $400 per hour range, consistent with broader GPR survey pricing.
Environmental and Archaeological Surveys
For environmental assessments, cemetery mapping, or archaeological investigations, GPR is often the most cost-effective option compared to alternatives like drilling boreholes. A single borehole on an environmental site costs roughly $5,000 to $10,000, which means a full GPR survey covering an entire acre for $1,000 to $2,000 can replace multiple boreholes and save tens of thousands of dollars. These projects are almost always quoted as flat fees based on acreage and reporting requirements.
Renting GPR Equipment Yourself
If you’re considering a DIY approach, GPR equipment rentals run about $300 per week or $400 per month. That’s dramatically cheaper than hiring a professional crew, but there’s a significant catch: GPR data is only as useful as the person interpreting it. The raw output looks like a series of wavy lines on a screen, and distinguishing a buried pipe from a tree root or a change in soil density takes training and experience. For simple tasks like confirming the general location of a known object, renting might work. For anything that involves safety decisions, like scanning before you drill into a concrete slab full of post-tension cables, professional interpretation is worth the cost.
How To Get an Accurate Quote
When you contact a GPR provider, the more detail you give upfront, the more accurate your quote will be. Be ready to describe the site size, what you’re trying to find or map, how deep you need to scan, and what kind of deliverable you need (on-site markings only, a basic map, or a full engineering report). If the site has access challenges, like being in a busy downtown area, on a slope, or behind locked gates, mention that too.
Getting quotes from two or three providers is worth the effort, since pricing can vary by 50% or more for the same scope of work. Pay attention to what’s included in each quote. A lower hourly rate that doesn’t include a written report may end up costing more than a higher rate that bundles everything together.