To answer the question of who installs French drains—the answer is simple: French drain installation contractors. These specialized drainage pros have the skills, tools, and knowledge to tackle your project from start to finish, including assessing your yard and planning and executing the installation.
Landscapers have the expertise to work the French drain installation into your existing landscape design, ensuring it not only functions well but also doesn't interfere with your yard's aesthetics.
Depending on the size of your yard and the scale of your drainage issue, you can purchase the pipes and equipment to create a French drain yourself.
French drains (aka weeping tile, perimeter drains, agricultural drains, and rock drains) are an easy-to-install solution for your drainage problems. Clients pay an average price of $5,000 to have a French drain installed professionally, with most homeowners paying $1,650 – $12,250.
Foundation repair and basement waterproofing companies typically offer both interior and exterior French drain installation to protect homes from water damage. French drains can be installed on the inside or outside of a property based on the specific water management needs.
On average, the cost of a French drain installation can range from £10 to £25 per linear foot. For a standard residential property, the total cost can typically fall within the range of £1,000 to £5,000. However, for more extensive or complex drainage projects, the cost can exceed this range.
French drain installation specialists, landscapers, foundation repair technicians, basement waterproofers, and plumbers can complete this job.
If installing the drain involves diverting a stream or affecting a wetland, you likely need a permit to move forward. Generally, a small French drain on your property that doesn't change the flow of runoff entering and exiting your yard won't need a permit.
Gravel trenches are a simpler version of the French drain. While they're less efficient, they can be a good option for less severe drainage issues. Water is directed into a trench lined with landscape fabric and filled with gravel.
Clay soil has poor permeability, meaning it doesn't allow water to pass through easily. In such cases, the effectiveness of a French drain may be limited as the water may struggle to drain away from the area efficiently. French drains may not be suitable for areas with high water tables.
How long does French drain installation take? Professional installation can take as little as 6 hours. If you're doing it yourself, expect to spend the whole weekend.
In some cases, the installation of a French drain may require planning permission from your local planning authority, especially if the drain is part of a larger construction project. You should consult your local planning authority for guidance on any necessary permissions and requirements.
Efficient Water Management
Preventing Basement Flooding: French drains, particularly exterior French drains, are excellent at keeping basements dry by channeling water away from the foundation before it can seep inside. This can significantly reduce the risk of basement flooding and the associated costly repairs.
Hire a Landscape Drainage Professional
You want to fix any drainage issues you have as soon as possible, and one way of doing that is by hiring a landscaping company. Depending on the complexity of your drainage issue, this is one of the landscape projects that, many times, should be left to a professional.
Blocked drain outside: DIY fix
If you're at all in doubt, call a professional plumber or drainage expert who will have the tools to unblock the drain quickly and efficiently. Don't attempt anything you're not sure about.
Depending on the placement and length of the PVC pipe, you can expect to pay between $2,800 and $6,500 for a French drain. The national average cost of a French drain, across projects of all sizes, is $5,000.
With stormwater, most likely, your drainage systems would fall under land improvements. Stormwater best management practices such as french drains, downspouts and gutter systems, bioswales, and dry wells could qualify as depreciable assets.
Many companies and blogs online state that french drains last from 10 years to 30 years. Again, I feel the longevity is directly related to the materials used and installation practices.
Connect with local French drain experts to help with your project. Installing a French drain yourself is possible but labor-intensive and time-consuming. Call 811 a week or two before you start your project to get your buried utility lines marked.
The ideal distance for a French drain from the house ranges from 5 to 10 feet. This distance provides an adequate buffer to keep water from seeping into and around the foundation, which can be a common cause of damage.
You'll likely need a permit since this project may require soil grading to avoid drainage issues. Repairing your floor may be more cost-efficient than replacing it if grading is necessary. No permit may be required to hang drywall on exposed wooden wall studs in your garage.
French drain depth: About 8 inches to 2 feet deep should be sufficient for many water-diverting projects, though related systems, such as those built around foundations and sub-ground living spaces, as well as the bases of retaining walls, may be deeper.