Beside the Building
Explain whether water collects at a side yard, patio edge or foundation perimeter. A collection route should respond to the source rather than only the lowest visible point.

From the coast to the peninsula, plan drainage around your home’s water routes. Discuss French drains, sump pumps and moisture control with Drainage & Moisture Control Inc.
A property on the coast and a home farther inland can have different layouts, access and drainage outlets. Within San Mateo County, the actual lot should guide the proposed work: its slopes, paved surfaces, existing drains and the areas where water gathers.
Drainage & Moisture Control Inc. provides drainage and moisture control services in San Mateo County. Share where the concern appears, what happens during rainfall and whether the home already has drainage or pumping equipment.
The goal is to connect collection, transport and discharge in a clear scope. A French drain collects below-ground water; solid lines carry water; a pump moves it from a basin when needed. Each component should have a defined purpose.
Explain whether water collects at a side yard, patio edge or foundation perimeter. A collection route should respond to the source rather than only the lowest visible point.
Describe where water crosses the property and which areas receive it. Access and changes in elevation can influence the collection points and piping route.
Standing water, damp ground and moisture entry need separate review. Drainage, pumping and waterproofing may need to be coordinated around the affected space.
Collect below-ground water with a planned trench, perforated piping and drainage materials.
Explore service ↗Discuss a basin and pumping where the available water route cannot rely on gravity alone.
Explore service ↗Coordinate underground collection around the affected area and the intended water route.
Explore service ↗Carry collected water between system components and the planned discharge destination.
Explore service ↗Review moisture entry and how waterproofing and drainage fit the below-grade space.
Explore service ↗Discuss ground vapor, barrier coverage and any separate standing water concerns.
Explore service ↗
For a coastside address, share the exposed areas, existing roof drainage and how water reaches the building. For a peninsula property, describe access between buildings, paved areas and any established drainage routes. Location gives context; it does not replace reviewing the site.
An available gravity outlet, a narrow side yard or a previously installed drain can change the proposed scope. Ask how collected water will move through the system and where it is intended to go before selecting individual components.
Send your San Mateo County address to discuss project availability. Listed service coverage describes where we work, rather than separate offices or a project history at every location.
Discuss My PropertyShare photos, timing and the areas you want reviewed.
Discuss collection points, transport piping and outlets.
Ask about access, materials and related work.
An estimate should help you understand where water will be collected, how it will be carried and the proposed destination. Ask which affected areas are included and whether existing features will remain part of the system.
Discuss excavation access, the materials proposed and any related work around the building. Photos and previous drainage plans can help explain the current layout, but the actual site conditions should guide the recommendation.
Keep a record of earlier repairs and the changes you notice during rainfall. These details make it easier to discuss whether the concern is new, recurring or connected to work already in place.
Explore Our PortfolioDiscuss the source, access and available outlet before selecting components.
Request a Free EstimateSan Mateo County is part of our established service coverage. Contact us with your address and affected areas to discuss project availability and requirements.
Yes. Access, elevation, existing surfaces and the available outlet can differ by property. The proposed components should respond to those site conditions rather than the county name alone.
A pump may be part of the proposed plan when collected water cannot follow a practical gravity route. The basin and discharge piping need to be considered together.
Moisture entry can have different sources. Discuss where and when water appears so drainage and waterproofing options can be reviewed for the affected space.
Their route, condition and outlet should be reviewed before deciding whether they can support new work. Previous plans and photos can help explain the current layout.
Share your address, photos, when water appears, existing drains and access constraints. Call (650) 609-0030 or (415) 226-5888 to discuss the next step.
Share your address, photographs and the areas where water appears.