Price for "French Drain Installation in Seattle, WA"
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Project & Assessments
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|---|---|
| Permit feasibility review | from $200 |
| Site evaluation and drainage assessment | from $250 |
| Soil percolation test and analysis | from $300 |
| Erosion risk assessment | from $300 |
| Drainage layout mapping | from $350 |
| Water table analysis | from $350 |
| Stormwater management consultation | from $400 |
| Site surveying and grading analysis | from $400 |
| French drain system design and planning | from $450 |
| Environmental impact assessment | from $450 |
| Hydrology study for site drainage | from $500 |
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Preparatory Works
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| Marking and locating existing utilities | from $150 |
| Temporary water diversion setup | from $600 |
| Geotextile fabric installation | from $650 |
| Erosion control setup | from $700 |
| Soil stabilization preparation | from $800 |
| Site clearing and debris removal | from $900 |
| Gravel base layer placement | from $950 |
| Excavation and trench digging | from $1800 |
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Structural & Carpentry
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| French drain trench lining | from $1200 |
| Access well and inspection port installation | from $1300 |
| Backfilling and soil compaction | from $1400 |
| Slope grading and shaping | from $1500 |
| Gravel and drainage rock installation | from $1600 |
| Installation of perforated drain pipe | from $2000 |
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Mechanical, Electrical & Plumbing (MEP)
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| French drain outlet installation | from $1300 |
| Drainage connection to storm sewer | from $1700 |
| Sump pit excavation and installation | from $2100 |
| Pump system installation for drainage | from $2400 |
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Finishes & Installations
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| Drain grate and inlet installation | from $900 |
| Erosion mat and filter fabric placement | from $1100 |
| Soil sodding and seeding | from $1200 |
| Surface restoration and landscaping | from $1800 |
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Additional Services & Permitting
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| Site cleanup and final walk-through | from $400 |
| Warranty and maintenance plan setup | from $500 |
| Inspection coordination and reporting | from $600 |
| Permit application and processing | from $750 |