Portland's drainage landscape offers a variety of solutions, each with its own cost implications. Simple solutions like burying downspouts can start as low as $500, but more involved systems, such as French drains with dry wells, can easily reach $13,000. French drains themselves, starting at $500, can range up to $13,000 for 200 linear feet, with costs scaling accordingly. Installation costs for exterior French drains typically fall between $1,000 and $6,500 for 100 linear feet, and $2,000 – $13,000 for 200 linear feet. More complex systems, requiring digging and installing underground drainage, can cost anywhere between $3,000 and $7,000 per linear foot. The average cost to install a new drainage system in your yard typically ranges from $1,500 to $8,000, with an average price of around $4,000 to $5,000 for a medium-sized yard. Local labor rates can influence the final price, with tradespeople generally charging between £15 and £30 per hour (approximately $17-$30 USD).
Cost Comparison
| System Type | Average Cost (per linear foot) |
|---|
| Burying Downspouts | $500 - $1,000 |
| Simple Trench Drain | $1,500 - $3,000 |
| French Drain | $2,000 - $7,000 |
| Underground Drainage | $3,000 - $7,163 |
| Complex System (Dry Well) | $6,000 - $13,000 |
Labor Costs
| Task | Hourly Rate (USD) | Estimated Hours | Total Cost (USD) |
|---|
| Excavation | $30 - $50 | 4 - 8 | $1,200 - $4,000 |
| Pipe Installation | $30 - $50 | 2 - 5 | $600 - $2,500 |
| Dry Well Installation | $30 - $50 | 2 - 4 | $600 - $2,000 |
| Backfilling & Grading | $20 - $40 | 2 - 4 | $400 - $1,600 |
Key Cost Factors
- System Type: French drains and underground systems are typically more expensive than simple trench drains.
- Drainage Volume: Larger yards or areas with significant water runoff require more extensive systems.
- Soil Conditions: Difficult soil may increase excavation costs.
- Permitting: Local permits can add to the overall expense.
- Labor Rates: Prices vary between contractors in Portland.
Tips for Hiring
- Get multiple quotes from qualified drainage contractors.
- Check references and read online reviews.
- Ensure the contractor is licensed and insured.
