How Much Does a Driveway Culvert Cost in Texas?

A national cost guide puts professional driveway culvert installation at $1,000 to $9,000, about $4,500 on average. That driveway culvert installation cost depends on the length and type of pipe and on your driveway material. It usually covers resurfacing the part of the drive that sits over the pipe.

Pipe alone costs less. The same guide lists 20 feet of 24-inch plastic pipe at $700, and aluminum or galvanized steel at about $800. Another national guide’s gravel driveway page adds $500 to $2,000 for culverts or drains.

Those are market numbers, not our price list. In Texas, the price also depends on whose road your drive meets. The road owner sets the permit fee and the pipe size, and sometimes the pipe material. Our page on driveway culvert installation shows how we set the pipe and build the drive back over it.

Whose road is it, and what does the county charge?

The road your driveway meets decides whose rules apply. A county road means the county’s permit. A state highway, a US route or an FM road means a TxDOT permit. Inside city limits, ask the city before the work starts.

You, the property owner, apply for the permit, and we build to it. Five counties in and around the Brazos Valley publish their fees and pipe rules:

When Waller County sets the pipe, you still buy it and pay for its delivery. The county does not sell or pick up culverts. At those rates, a 40-foot culvert set by the county comes to $2,000 in fees before the pipe.

Waller County will not install commercial driveways. Those take a $400 permit, a $100 inspection and a design by a professional engineer.

Montgomery County Precinct 1 sells culvert pipe and lists its prices in a pricing guide it posted in 2025. Twenty feet of 18-inch corrugated plastic pipe costs $259.80 there, or $664.80 with backfill material. The 24-inch pipe costs $448, or $853 with backfill.

Backfill is a flat $405 per install, and the precinct installs culverts up to 30 feet long. Those are one county’s own numbers, not a Brazos Valley price.

On a state highway, TxDOT’s Form 1058 is the permit, and the property owner or an authorized representative applies. Any drainage impact on the state highway system needs TxDOT’s approval before any local approval. Our guide to the TxDOT driveway permit covers the steps.

How do pipe size and length change the price?

You rarely pick the pipe size yourself. Brazos County determines or verifies it, and Waller County tells you the size and grade before you install. In Burleson County, Road and Bridge inspects the spot and sets the diameter. On a state highway, TxDOT approves the size of any drainage structure.

Bigger pipe costs more. At the Montgomery County Precinct 1 prices above, 20 feet of 24-inch pipe costs $188.20 more than 18-inch. A national guide says driveway pipe is typically 10 or 12 inches across. These county minimums run larger: 15 inches in Madison and Waller counties and 18 inches in Washington County.

Length follows the width of your drive, and longer pipe costs more. The Washington and Waller fees in the table climb with length. Washington County caps a home driveway culvert at 40 feet and a commercial one at 80 feet. Any run over 40 feet there needs a junction box with an inlet.

Does the pipe material change the cost?

Yes. In the national guide’s 24-inch prices above, plastic runs $100 less than aluminum or galvanized steel. The same guide calls concrete durable and a fit for heavy traffic. It is also heavy, so it takes more manpower and machinery to set.

The guide says plastic is light and suits drives with little traffic. Galvanized steel is strong but can rust. TxDOT lists concrete, corrugated galvanized steel and plastic pipe among the most common culverts.

The county can rule out plastic, though. Washington County allows only corrugated metal or reinforced concrete pipe for a driveway culvert. It allows plastic only for a temporary construction entrance.

What goes around and over the pipe?

The pipe goes on a firm bed at the ditch grade. The FHWA gravel roads guide shows a new culvert set right on the flow line of the ditch. Set there, the pipe leaves no standing water at the inlet or outlet. In Grimes County, the Road Department sets the flowline before construction.

Backfill then goes in around and over the pipe and gets compacted. Waller County inspects the pipe before it is backfilled.

A drive onto a state highway needs more at the ends. TxDOT uses safety end treatments for driveways with drainage pipes in its right of way. No culvert headwalls or similar vertical ends are allowed. The ends are sloped at 6:1 or flatter, with concrete riprap to stop erosion and protect the pipe end.

The national price usually covers resurfacing the drive over the pipe. It may or may not cover rock or sod to line the ditch. In Washington County, the driveway surface is the landowner’s to maintain.

Over the backfill, road base is rebuilt and compacted. The finished surface can be road base or gravel, chip seal or an asphalt driveway.

Each surface has its own price. Our posts on what a gravel driveway costs and asphalt driveway cost in Texas cover two of them.

What does it cost to replace a caved-in or plugged culvert?

The national range above comes from a guide to culvert replacement, so $1,000 to $9,000 applies here too. That guide says a rusted-out or damaged culvert is generally not worth repairing. A replacement also means digging out the old pipe and opening up the drive over it.

A failing culvert can do damage past the pipe. The FHWA gravel roads guide warns that plugged or collapsed culverts cause serious damage when water flows over roads. Washington County notifies owners of culverts in poor condition and gives them time to fix or replace them.

Culvert replacement is work we do. On one job, an old culvert had caved in and had to be replaced to meet TxDOT requirements. We removed it, installed the new one and got the base ready for asphalt. An asphalt drive gets its cut patched with hot mix, the same work as asphalt repair.

Culvert work means digging. Texas law requires a call to 811 at least 48 hours before you dig, the Railroad Commission of Texas says. The call is free.

How do you get a real number for your culvert?

Your price starts with the road owner’s permit and the ditch at your drive. We come out, look at the site, measure it and give you a free estimate. We install and replace driveway culverts to the permit, then build the drive back over the pipe. Private roads and ranch roads get the same culvert work wherever they cross a ditch.

We are based in North Zulch and work the Brazos Valley and about 60 miles around. Call or text (979) 595-5944, or see how we install and replace driveway culverts.