How much does a drainage system cost

Offering reliable landscaping services to homeowners in British Columbia since 2013

Natasha Maerz

Natasha Maerz

Owner/Office Manager

1. How much does a perimeter drain system cost?

A simple perimeter drain & downspout drain system around a 40’ x 50’ residential home can cost between $10,000 - $15,000.

What is included in a simple perimeter and downspout drain system?

  • Excavation ticket with BC1Call, and on-site marking
  • Excavating around services: Water, Sewer, Gas, Electrical, Cable
  • Excavation of soil around house down to foundation footer
  • Perimeter drain system with inlet holes in pipe to collect ground water
  • Downspout drain system with no holes in pipe to collect roof and gutter water
  • Concrete sump system in ground to collect water, and filter out debris
  • System tied into city storm water connection, ditch, or other source
  • Rough grading of soil around house where excavation occurred
  • Site cleanup, and road cleanup

A more complicated perimeter drain & downspout drain system around a 40’ x 50’ residential home can cost between $20,000 - $50,000 +

Additional factors that will increase the cost:

  • Protecting surfaces from machinery (temporary roads)
  • Finished landscaping that either needs protecting or replacing afterwards
  • Tight spaces that don’t allow dump truck, excavator and loader access
  • Obstacles that need to be worked around
  • Disposal of any soil from the project (soil expands 1.3 X when excavated, Gravel is imported for around pipes)
  • Heavy clay soil that requires filter fabric around perimeter drain system (pipe and gravel)
  • Foundation waterproofing
  • Finishing landscaping to remove all traces of excavation

Factors that can decrease the cost:

  • New construction with no landscaping within 15’ of buildings
  • Wide open site with room for efficient excavation and earth moving equipment
  • No concrete driveways, sidewalk or patios to work around
  • Onsite place for extra excavated soil
  • Well-draining backfill soil above drainage system

 

As you can see it really depends on your specific site access, current landscaping, and desired cleanup at the end of the project.

If you would like to learn more, please visit our process page where you can learn how we can get you a free over the phone estimate.

2. How much does a French drain cost?

A simple French drain system 75’ long can cost between $4000-$6000

What is included in a simple French drain system?
  • Excavation ticket with BC1Call, and on-site marking
  • Simple plywood temporary roads
  • Sod cut, saved and reinstalled at completion of project
  • Excavation of soil 16” Wide x 16” deep x length of drain system
  • All soil excavated hauled and disposed of
  • Tested filter fabric lining bottom, sides, and top of trench
  • 4” PVC perforated pipe at the bottom of the trench
  • Trench backfilled with clear drain rock
  • French drain system connected to outlet source: City storm, ditch, etc.

A more complicated French drain system 150’ can cost between $10,000 - $20,000 +

Additional factors that will increase the cost:
  • Size and length of the system
  • Protecting surfaces from machinery (temporary roads)
  • Finished landscaping that either needs protecting or replacing afterwards
  • Tight spaces that don’t allow dump truck, excavator and loader access
  • Obstacles that need to be worked around
  • Time of year hindering our ability to remove all traces of excavation
  • Installation of concrete sump basin for collection and filtration of debris
  • Sump system with electric pumps
  • Length of distance to discharge location
Factors that can decrease the cost:
  • New construction with no landscaping with 15’ of buildings
  • Wide open site with room for efficient excavation and earth moving equipment
  • No concrete driveways, sidewalk or patios to work around
  • Onsite place for extra excavated soil
  • Well-draining backfill soil above drainage system

3. How much does it cost to regrade a yard?

Regrading a 5000 ft2 yard can cost between $3000 - $4000

Regrading a yard or site is the process of making sure the ground is sloped away from homes and structures.

This process involves completely removing the existing landscape and starting over again.

What is included in regrading my lawn?

  • Excavation ticket with BC1Call, and on-site marking
  • Harley raking existing lawn to repurpose it
  • Laser leveling area to make sure it is graded correctly
  • Hand raking the perimeter if required
  • Minor disposal if required of unearthed rocks and debris

A more complete regrade and new lawn can cost between $5,000 - $6,000

Additional factors that will increase the cost:

  • Site and gate access for machines
  • Protecting surfaces from machinery (temporary roads)
  • Finished landscaping details (lawn, plants, trees)
  • Tight spaces that don’t allow dump truck, excavator and loader access
  • Obstacles that need to be worked around
  • Time of year hindering our ability to work with dry soil

Factors that can decrease the cost of both systems:

  • New construction with no landscaping
  • No landscaping to replace afterwards
  • Site access
  • Onsite disposal if required

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