Precast trench drain cost typically runs $40-$150 per linear foot installed, with many standard residential and light-commercial projects totaling $2,000-$8,000. Drain width and load rating, excavation depth, outlet connections, concrete restoration, and local labor rates can move a quote well beyond that range.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Installed drain system | $40 per linear ft | $85 per linear ft | $150+ per linear ft | Typical installed range; major site work can raise the total |
| Materials only | $15 per linear ft | $35 per linear ft | $80+ per linear ft | Channel, grate, and basic accessories; rating affects price |
| 40-foot project | $1,600 | $3,400 | $6,000+ | Assumes standard access and ordinary surface restoration |
| Excavation and base | $10 per linear ft | $25 per linear ft | $60+ per linear ft | More for deep cuts, hard soil, or concrete removal |
What a 40-foot precast trench drain installation costs
For a straightforward 40-foot run beside a garage, driveway, or building entrance, a practical installed budget is $2,000-$6,000. A typical midpoint is about $3,400, or roughly $85 per linear foot, including standard precast channels, grates, bedding, labor, and a basic connection to a suitable discharge point. The price assumes accessible work, modest excavation, and limited pavement repair.
Small jobs may cost more per foot because contractors still have mobilization, layout, cutting, and outlet work to cover. A 10-foot installation may come to $1,000-$2,500, while a 100-foot commercial run can reach $6,000-$18,000 or more, depending on capacity and construction details. A long, clear run usually spreads setup expenses over more footage, but it may require multiple outlets or heavier equipment.
Material-only pricing is commonly $15-$80 or more per linear foot. Basic channels with light-duty grates sit toward the low end; wider channels, higher load ratings, locking grates, and integrated outlets increase the system price. Assumptions: U.S. mid-market pricing, standard precast concrete channel, ordinary access, and no major utility relocation or engineered stormwater work.
For a typical 40-foot residential run, allow about $3,400 before unusual excavation or extensive concrete replacement. A contractor’s quote should specify the drain’s clear width and depth, grate class, outlet locations, bedding, disposal, and the exact surface area to be restored.
How channel, grate, excavation, and labor appear on quotes
Quotes divide the work differently, so compare the included scope rather than only the bottom-line figure. The table below shows common allowances for a 40-foot standard-duty installation. Actual prices depend on the product, access, and amount of surface demolition.
| Quote item | Low | Average | High | Typical scope |
|---|---|---|---|---|
| Precast channel and grate | $600 | $1,400 | $3,200 | $15-$80 per linear ft; system and load class vary |
| Excavation and base | $400 | $1,000 | $2,400 | $10-$60 per linear ft; includes trench preparation |
| Installation labor | $500 | $1,200 | $2,400 | Layout, setting, alignment, and assembly |
| Outlet and pipe connection | $150 | $450 | $1,200 | Basic end outlet through longer or more complex piping |
| Concrete and disposal | $250 | $700 | $1,800 | Saw cutting, patching, haul-away, and cleanup |
Labor often accounts for roughly $15-$60 per linear foot, although small jobs may be billed with a minimum charge. If labor is quoted by time, a common planning rate is $65-$125 per worker-hour; crew size and equipment needs determine the total hours.
Some bids include concrete saw cutting and replacement in the installation rate, while others list them separately. Ask whether the price includes excavation spoil removal, bedding material, channel end caps, grates, outlet fittings, delivery, and final grading. Separate line items make it easier to identify whether a low bid omits necessary work.
How drain width, load class, and trench depth change the price
Channel width is one of the main product cost drivers. A narrow 4-inch channel is often suitable for limited residential runoff, while 6- to 8-inch models may be selected for larger paved areas or greater flow requirements. Wider channels typically use more material and may require a deeper, broader excavation. Confirm that the design handles expected runoff rather than choosing by width alone.
Load class matters as much as size. Light-duty grates for pedestrian areas generally cost less than systems designed for passenger vehicles, delivery trucks, or industrial traffic. A driveway exposed to regular heavy vehicles may need a higher-rated channel, grate, and concrete encasement. Moving from a light-duty to a heavy-duty system can add $20-$80 or more per linear foot once upgraded components and support are included.
Depth and discharge conditions can sharply change installation charges. A shallow trench of about 8-12 inches in accessible soil is less demanding than a 18-24-inch excavation or a run that must cross a thick slab. Rock, buried utilities, groundwater, and poor soil may require slower digging, additional bedding, or engineering. If a gravity outlet cannot be achieved, a sump or pump can add $500-$2,500 or more.
Drain length also affects both product quantity and hydraulic design. Runs longer than about 50-100 feet may need additional outlets, cleanouts, or a specified slope to carry water reliably. Before accepting a per-foot quote, check that channel capacity, grate rating, trench depth, and outlet plan match the site’s use. A low-cost narrow channel can be an expensive choice if it needs replacement or does not drain adequately.
Why regional labor rates shift trench drain estimates
Installed prices commonly vary by 10%-30% between markets, even when the drain product is identical. Contractors in high-cost metropolitan areas may charge more for labor, equipment, delivery, and disposal than providers in smaller cities or rural areas. Regional differences are especially noticeable on short runs, where mobilization and minimum charges represent a large share of the quote.
As a broad planning comparison, a standard project in a lower-cost rural or small-city market may fall around $35-$110 per linear foot. A typical suburban market may run $50-$130 per linear foot, while a high-cost urban area may reach $65-$170 or more per linear foot. These are rough installed ranges, not guaranteed local rates; unusual soil and concrete work can outweigh the regional labor difference.
Delivery distance affects precast materials because channels and grates are heavy and may require a truck with suitable unloading equipment. A nearby supplier may charge $100-$500 for delivery, while a distant shipment or specialized lift can cost more. Urban access restrictions, limited parking, and work-hour rules may also add setup time. Compare quotes from contractors working in the same area and request delivery and mobilization charges separately.
Weather and seasonal demand can influence scheduling more than the listed product price. Wet soil may complicate excavation, and freeze-thaw conditions can affect when concrete work is practical. During busy construction periods, a contractor may have less flexibility or charge more for an expedited start. A flexible schedule can help avoid rush fees, but the price benefit depends on local availability.
How long excavation and channel setting usually take
A crew of two or three workers may complete a simple 20- to 40-foot installation in one to two working days, including cutting, excavation, channel placement, connection, and basic restoration. A larger 60- to 100-foot project may take two to four days when access is clear and the outlet is nearby. These durations exclude substantial concrete curing time or delays caused by weather and inspections.
Labor time increases when workers must hand-dig around utilities, remove thick reinforced pavement, manage groundwater, or carry spoil through restricted access. A mini excavator can speed open-site excavation, but delivery, operation, and access can add $300-$1,000 or more. Concrete saw cutting may add several hours, while extensive slab replacement can turn a drain installation into a multi-day paving job.
Ask the contractor whether the work schedule includes demolition, haul-away, setting the channel in concrete, connecting the pipe, and reopening the surface. A price that assumes the owner handles debris or reinstalls paving is not directly comparable with a turnkey quote. For a tight-access site, the estimated labor hours and equipment plan are as important as the quoted rate per foot.
Which add-ons raise a precast drain quote
Outlet piping is a frequent extra. A simple connection close to an existing storm line may cost $150-$600, while 20-50 feet of buried pipe, additional fittings, or difficult routing can add $500-$2,000 or more. The contractor should identify where water will discharge and whether the connection is allowed under local rules. A drain without a workable outlet may collect water rather than solve the problem.
Removal and restoration can rival the channel cost. Saw cutting and removing an existing concrete strip may add $8-$25 per square foot, with disposal included or itemized separately. Replacing concrete commonly adds $8-$18 per square foot for basic work, and decorative finishes, reinforcement, or color matching may cost more. Asphalt, pavers, and landscaping each have different repair rates.
Other possible charges include end caps, catch basins, cleanouts, delivery, traffic control, utility locating, and a pump system. A small catch basin may add $150-$700 for the component and installation; larger structures or multiple connections cost more. Permit and inspection fees vary by jurisdiction and job scope, often from $50 to several hundred dollars where required. Have every allowance, exclusion, and potential change order stated in writing before work begins.
Precast concrete versus polymer channel pricing
Precast concrete channels are valued for strength and are commonly used where vehicle loads and durable construction matter. Basic precast channel and grate materials often cost $15-$80 per linear foot, with heavy-duty systems above that range. Their weight may increase delivery and handling costs, and installation generally requires accurate bedding and concrete support.
Polymer concrete systems are another option, often priced around $20-$100 per linear foot for channel and grate, depending on size and load class. They can be lighter to handle than conventional precast units and may offer useful chemical resistance, but the complete installation still needs suitable support and correct connections. A polymer product is not automatically cheaper once delivery, grates, and installation are counted.
For a 40-foot run, material differences may amount to several hundred dollars, while excavation and surface restoration can dominate the total. Compare products with the same clear width, depth, load rating, grate type, and outlet provisions. Use installed quotes for the final comparison because channel-only prices omit the site work that often drives the budget.
How to lower the installed price without undersizing the drain
Keep the run as short and direct as drainage requirements allow. Each additional foot adds channel material and labor, and bends or multiple outlets can increase fittings and layout time. A qualified contractor can help identify the shortest effective route, but the design should still collect water across the problem area and discharge it safely.
Choose the load rating for actual traffic rather than buying the heaviest system by default. A pedestrian patio and a truck-access loading area have different requirements. Likewise, avoid paying for decorative or specialty grates where a standard grate is acceptable. Do not reduce the grate rating or channel capacity below what the site needs; a failed installation can cost more than the initial savings.
Get at least three itemized estimates based on the same length, channel dimensions, grate class, outlet location, excavation depth, and restoration area. Ask whether each bid includes delivery, spoil disposal, concrete, and cleanup. If the surface is already being replaced as part of a driveway or paving project, combining the work may reduce separate mobilization and cutting charges.
Prepare access by moving vehicles, planters, and stored items, and confirm utility locations before digging. Avoid unnecessary demolition by limiting the cut to the specified trench width and agreeing on restoration boundaries. The most reliable savings come from controlling excavation and restoration scope while preserving the drain’s required capacity and load rating.