⚖️ Side-by-Side Comparison
Interior vs Exterior French Drain
Interior French drains run $3,000-$6,000; exterior runs $5,000-$10,000+. Exterior drains stop water before it reaches the foundation and protect the structure; interior drains manage water that enters (with a sump pump) at lower cost and work where exterior access is impossible. Severe cases use both. Exterior is the structural fix; interior is the practical fix.
Option 1
Interior
Upfront Cost$3,000-$6,000
LifespanSee comparison above
MaintenanceVaries
DIY FriendlyVaries
ROIVaries
Option 2
Exterior French Drain
Upfront Cost$5,000-$10,000+
LifespanSee comparison above
MaintenanceVaries
DIY FriendlyVaries
ROIVaries
📊 Detailed Comparison
| Feature | Interior | Exterior French Drain |
|---|---|---|
| Upfront Cost | $3,000-$6,000 | $5,000-$10,000+ |
| Lifespan | See comparison above | See comparison above |
| Maintenance | Varies | Varies |
| DIY Friendly | Varies | Varies |
| ROI | Varies | Varies |
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🏆 Our Verdict
Both options have their strengths. Consider your budget, timeline, and long-term goals. Need help deciding? Get free quotes from local pros.
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