Start with the repeat symptom
Note where water returns, how long the area remains wet, whether an inlet or basin overflows, whether the trench line feels saturated, and whether visible outlet flow is weaker than before. Record what changed after landscaping, irrigation, roof, paver, pool, grading, or prior drain work.
Find every access point
Locate visible grates, basins, downspout connections, cleanouts, inspection ports, pipe ends, pop-up emitters, and outlets. A service visit is more useful when each reachable point can be opened, traced, or tested instead of treating the wet area as the only clue.
Trace the complete water path
A French drain works as a connected source, collection trench or inlet, buried route, transition, and outlet. A restriction, damaged connection, settled segment, root conflict, undersized collection area, or discharge limit anywhere along that path can recreate the same surface symptom.
Separate cleaning from repair
Leaves, mulch, sediment, roots, or debris at a reachable grate, basin, cleanout, or outlet may support a cleaning scope. Crushed or separated pipe, failed connections, settlement, missing access, damaged collection points, or an isolated trench failure can require targeted repair.
Know when the scope may be broader
Widespread fabric or stone contamination, an unworkable slope, a buried route that cannot be accessed, recurring failure after prior work, or an outlet that cannot accept the route may lead to rerouting or replacement rather than another localized cleaning or patch.
Confirm the outlet and boundary
Do not assume a roadside swale, culvert, canal, street, right-of-way, neighboring lot, public catch basin, or unidentified pipe is an authorized outlet. The property-specific scope may require City guidance, utility marking, boundary confirmation, permitting, or qualified professional review.
Compare the written repair scope
Ask the proposal to identify the observed failure, diagnostic or cleaning work, components opened or replaced, route and outlet work, excavation, access, utility process, debris handling, restoration, exclusions, schedule, change approval, and maintenance instructions.
Plan restoration and future access
The written scope should address backfill, finish grading, sod, landscape beds, irrigation, pavers, concrete, cleanup, and future access to the inlet, cleanout, and outlet. A repaired system is easier to maintain when its service points remain identifiable and reachable.