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Cost Of French Drain System

Exterior French Drain Cost Elements

French Drain Cost – How To Calculate Cost in Macomb Township, Michigan

An exterior French drain will need just a couple of materials . The aspects listed below must be considered when getting a price for your french drain:

Linear Distance The expense of a french drain corresponds directly to how long the drain will need to be. The length of the perimeter around your house and the distance to a drain spot will determine the number of linear feet you will have to purchase materials for.Landscaping When setting up an exterior french drain, you will be digging a drench a number of feet deep depending upon the depth of your structure and 1.5-2.5 feet large around the perimeter of your house. This means that you might need to consider the expense of replacing any blockages like fences, gardens, walkways, and driveways, landscaping features or shrubs, and add brand-new grass seed to cover the location once it is filled back in.

Selecting The Perfect French Drain Gravel

Due to the structure of a French drain, the backfill will include smaller gravel size stones towards the top of the trench. These should be similar in size, shape and density to river gravel. As you move towards the bottom of the trench, larger course stones should be used to compliment the natural filtration of water. The larger stones should be tough long-lasting material so as to avoid constant and potentially expensive replacement going forward. All layers of stone/gravel should be tightly packed. The trench can also be covered with soil/turf but there must be a small gap either side of the trench.

Is Using Rigid Or Flexible Pipe Better

Flexible pipe covered with a water-permeable textile is easier to install, and it costs less by eliminating the need for landscape fabric but it deteriorates faster. Rigid pipe lasts longer, and it can be cleared with a snake without fear of damage if it ever becomes clogged. Most experts recommend rigid PVC pipe for deep installations.

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French Drain Retaining Walls

If you have a lot of water in your yard, it can cause soil erosion. If this is the case, you may want to install a retaining wall to assist. Retaining walls can be constructed in several ways: interlocking concrete blocks to form a wall or pouring and stamping concrete. Dry stack retaining walls and poured concrete walls cost $20 to $25 per sq.ft.

Along A Retaining Wall

French drain installation and catch basin system side

If you have a retaining wall, installing a French drain will help protect the walls integrity and make it last longer. If you dont have one, the water will flow downhill and build up behind the wall to apply unnecessary pressure. Youll typically add your French drain behind the first stones or blocks that go into the base. The pipe will get put into the same concrete or compacted gravel base that helps support your wall. The French drain cost for this location will vary depending on the landscaping you have around it and the wall material. However, budget between $25.00 and $50.00 a linear foot.

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Cost Of Installation Supplies

Once you have determined the linear distance you need to cover you can use the prices below to determine the overall cost to install a french drain. These prices may vary based on your local area but should give you a good overall indication of how much you will need to spend:

  • $60 $70 per 100 feet | 4 perforated drain pipe Drainage pipe is laid in the trench on a bed of stone, at a slight drainage angle that diverts runoff water away from the area.
  • $20 per cubic foot | Drainage gravel Gravel is used to fill the trench below and above your drain pipe. Youll use approximately 2 square feet of gravel per linear foot of trench.
  • $20 $25 per 100 feet | Landscape fabric Landscape fabric is placed into the trench first and wrapped over your drain pipe to prevent clogging. You can also purchase perforated drain pipe that is pre-wrapped with the cloth, but at a higher cost. Regardless, you need the landscape cloth on top of the trench as well.
  • $5-10 | Plastic couplers to connect pieces of drain pipe.
  • $150 $200 per day | Trencher rental.

Interior Perimeter Or Basement French Drain Cost

Interior basement French drains cost around $40 to $100 per linear foot or $4,000 to $15,000 on average, though installation prices may go as high as $18,000. Most basements need 100 to 150 linear feet of drain.

Basement foundation drains, also called drain tiles or perimeter drains, require more work and materials since contractors need to install the drain pipe under the concrete. These basement French drains often need specialized membranes for drainage.

Its important to install a basement drain correctly to ensure minimal repairs are needed down the line. On average, basement drain repair costs $3,230.

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How Can I Save Money On French Drain Installation

You can save by:

  • Getting at least four competing bids.
  • Buying and delivering your own materials.
  • Doing some or all of the work yourself if youre handy around the house.
  • Using excavated dirt for fill in other areas of your property.
  • Final Thoughts

    There is no one-size-fits- all approach to a wet basement, but whether it stands alone or is just one part of the solution, a French drain is an essential component in a comprehensive drainage plan.

    External References:

    Cover The Trench With Filter Fabric

    FRENCH DRAIN – How Much It Does Cost?

    To protect the pipe of the French drain system from dirt, silt and tree roots in the trench, place a water-permeable filter fabric barrier on the gravel bed with a suitable slope in the trench.

    Then pour gravel or landscaping stone about 3 inches thick at the bottom of the trench and compact by compactor machine. Gravel will work properly for drainage piping.

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    Dry Well Or Vertical French Drain Cost

    A dry well costs $300 to $1,500 to install, depending on the size, material, and digging conditions. A dry well is an underground drainage tank that collects stormwater runoff, and allows it to slowly replenish the water table.

    Dry Well or Vertical French Drain Cost

    Concrete Tank $500 $3,000+

    Multiple dry wells may be installed in a large yard with extensive drainage problems or standing water. Dry wells work best in sandy soils that drain well, and in areas with a low water table.

    Vertical French Drain Cost

    A vertical French drain costs $50 to $250 to install, depending on the size, gravel type, and soil conditions. A vertical French drain or seepage pit is a deep hole filled with gravel that collects stormwater runoff. This gravel pit releases water into the soil faster than dry wells.

    Both vertical French drains and dry wells make good exit points for basement sump pump systems, backyard drainage systems, and downspout and gutter drainage systems.

    Cost Of French Drain In Yard

    The cost of french drain installation in yard is associated with the cost of materials and professional work experience. Generally, people prefer to install French drains professionally.

    Which can give peace of mind to the landlord. Because professional companies will guarantee their installation drainage in yard, if any other electrical or plumbing lines are damaged during installation, you can resolve the issue by contacting the company.

    Professionally installing a French Drain in Yard can cost about $ 10 to $ 50 per linear foot.

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    Suggested Read

  • Cover with Gravel and Filter Fabric.
  • Backfill with Topsoil.
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    Advantages Of French Drain In Yard

    French drain system for Sale in Woodbridge, VA

    French Drain System for Yard is one of the most effective ways to prevent damage caused by excess water moisture. Some other benefits of the French drain system are as follow

  • The materials and installation of French drains are inexpensive and easy. Which makes you an effective alternative to protect your home from water damage.
  • Problems with such drainage systems can be cleared by clogging or drainage problems by flushing the water in the pipes until the water flow resumes.
  • This type of drain system requires minimal maintenance from time to time after installation. By maintaining it periodically, it can last for decades.
  • The improper french drain lawn drainage pipe systems can lead to damage to your garden lawn. But a French drain garden system installation can be a good option for keeping your lawn clean and dry.
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    French Drains Dont Always Workhere Are Four Reasons Why

    French drains can work decently well on some properties, and foundation waterproofing companies around the country push them on homeowners more often than almost any other system for waterproofing.

    The problem is, French drains dont always work! Below are four concrete reasons why they fail to solve your drainage problems.

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    What Are The Most Common Backyard Drainage Problems

    Here are the most common signs of backyard drainage problems:

  • Water pools near the foundation, downspouts, plant beds, or yard
  • Water is seeping into the basement, foundation, or crawlspace and causes stains and mildew.
  • Gutters are overflowing during rain.
  • Paved surfaces have an improper slope causing water traps.
  • Topsoil and mulch start washing away.
  • Cracked or uneven sidewalks or patios from soil erosion.
  • Persistent water pooling or puddles in the yard or near the house may also be coming from hidden leaking pipes underground. The average cost to fix a leaking pipe is $150 to $850.

    Catch Basin & Storm Drain Installation Cost

    French Drain, How Much Does It Cost To Install Drainage

    Storm drain installation costs $8 to $15 per square foot for a system of catch basins connected to underground stormwater pipes. Plastic catch basins cost $20 to $130 each for the materials, with sizes up to 24″ x 24″. Pre-cast or cast-in-place concrete drain boxes are significantly more expensive.

    Catch basins or backyard storm sewers are similar to inlets, but the basins are larger. The drain box’s grate collects stormwater and filters debris before the water flows into drainage pipes. The grate is easily removable for regular cleaning.

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    French Drain Costs By Type

    French drainage systems are typically installed near house foundations with only gravel covering the drain. French drains are placed in the basement, crawl space, or exterior of the home and are either deep or shallow, which drastically affects the cost.

    Backyard French drains more than 10 feet away from the house may have sod or soil above the gravel, with a proper soil separator around the trench to keep dirt out of the drain. Professionals recommend installing a sump pump with most French drain systems to pump water out more efficiently.

    Cost Of French Drain Installation

    The cost of a french drain installation varies due to time-consuming obstacles that impact prices. With this in mind, the biggest expense for a french drain installation is labor. In addition, the proposed price for the french drain cost may increase if your property also needs a catch basins drain or a pop-up emitter installation. Indeed, our team trusted landscape drainage specialist will consider these factors when inspecting the property. If your property has a gutter system, connecting it to another landscape drainage system can also increase the cost of a french drain. In some cases, concrete has to be cut or removed to install the french drain system, and it will require machinery. Guess what that is more labor-intensive that will add to the cost.

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    What Factors Affect The Cost Of A French Drain Installation

    The cost of your French drains installation can vary depending on many factors, such as:

    • How long it takes to install it
    • Its distance from the sewer
    • The type of soil
    • If there are cracks to repair in the foundation before moving forward
    • Having to waterproof the foundation

    The factors mentioned above are only some that should be considered during a French drains installation. For instance, when talking about accessibility, how easy will it be to get under the covering surface? Is there asphalt or concrete to break down? Is there a garden that will need to be dismantled? What needs to be done? Also, space constraints will play a big role in the cost of installing your french drain. How much space is there between your home and your neighbours? Will smaller equipment be needed for the job? Of course, our Renovation Advisors will be able to help, but itll be our 53 Points Verified Contractors thatll be the experts in the matter.

    In the province of Quebec, the cost of the work should be similar from one region to another. However, in Montreal, prices tend to be slightly higher by about 5%, and prices can be expected to be about 20% higher in Ontario, particularly in urban areas such as Toronto and Ottawa.

    Where Does The Water From French Drains Go

    French Drain System

    A French drain needs an exit point to remove standing water and prevent flooding. A French drain carries water down a gradual slope into a dry well, public drain or water main, or drainage ditch. Stormwater may be directed into city irrigation ditches with permission from the local water department.

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    French Drain Vs Sump Pump

    Sump pumps are designed to pull water out of basements from low lying areas prone to collecting water. They can be less expensive than an interior French drain, costing between $700 and $1,600 on average instead of $2,800 to $6,500 for French drains. Unlike French drains, they rely on electricity, which can become a problem if the power in the home goes out during a storm. Sump pumps are not designed to keep water away from the entire basement and are better suited for targeted areas. Conversely, French drains are designed to draw water away from the entire basement.

    Type of Drainage System
    $2,800 – $6,500

    Cost Of Installing A French Drain

    Another factor to keep in mind before installing a French drain is the cost of materials, as well as any costs associated with hiring a professional to complete this work. While this task can be handled by an experienced DIYer, many people may prefer to have the system professionally installed to ensure that it will work effectively. Additionally, hiring a professional can give you better peace of mind because most companies will guarantee their work, so if there are any problems with the French drain or if any other electrical or plumbing lines are damaged during the installation, you can contact the company to resolve the issue.

    The average cost to have a French drain professionally installed is about $5,000, though it can climb to $18,000 for an interior French drain installation. Keep in mind that the longer the drainage trench, the higher the cost of materials. In general, you can expect to pay about $10 to $50 per linear foot for an exterior French drain and about $40 to $100 per linear foot for an interior French drain due to the specialized membranes and additional work required to install this type of system.

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    French Drain Cost Factors

    An exterior french drain will require only a few supplies . The following factors should be considered when pricing out your french drain:

    • Linear Distance The cost of a french drain corresponds directly to how long the drain needs to be. The length of the perimeter around your home and the distance to a drainage area will determine how many linear feet you will need to buy supplies for.
    • Landscaping When installing an exterior french drain, you will be digging a drench several feet deep depending on the depth of your foundation and 1.5-2.5 feet wide around the perimeter of your home. This means you may need to factor in the cost of replacing any obstructions like fences, gardens, sidewalks and driveways, landscaping features or shrubs, as well as new grass seed to cover the area once it is filled back in.
    • Obstructions around Foundation If you have a home with large wells around the basement egress windows, going around these or planning on methods to keep them dry could add to your cost.


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