French drain questions for Palo Alto homes

How this usually starts

Homeowners typically start by describing the property, the visible issue, the city, timing, and any photos or previous inspections. A qualified local provider can then decide whether the project is a fit and what kind of inspection or estimate is appropriate.

This guide is intentionally conservative: it helps you prepare better questions and request help, but it does not replace a professional inspection, engineering judgment, official code guidance, or a contractor estimate.

Local context to check

• Flat lots can make gravity discharge challenging, so providers may need to discuss slope, outlets, sump pumps, or other ways to move water safely.
• Older homes, mature trees, patios, and narrow side yards can affect trench routes and restoration after French drain installation.
• Ask providers to explain whether the problem is subsurface water, surface runoff, roof runoff, or a blocked existing drain.

Cost and scope drivers

• Route length, tree roots, hardscape, utility conflicts, and whether hand digging is needed.
• Discharge feasibility on a flat lot and whether a pump, catch basin, or downspout work is part of the plan.
• Restoration standards for lawn, planting areas, paving, irrigation, and cleanout access.

What to document before requesting help

• Where water appears after rain, nearby downspouts, existing drains, hardscape slope, and areas near the crawlspace or foundation.
• Photos of outlets or places where water currently leaves the property, if any.
• Tree-root concerns, access limitations, and any prior drainage or waterproofing work.

Questions to ask before hiring

• Can gravity drainage work on this lot, and where will water discharge?
• How will roots, hardscape, utilities, and surface restoration be handled?
• What maintenance access is included so the system can be cleaned later?

FAQ