French Drains & Grading in Fairfax, VA

Yard drainage and regrading that move water away from walls, foundations, and low spots.

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Get a Free Retaining Wall Estimate

Tell us about your slope — how steep it is, how tall the wall needs to be, and the best way to reach you. We will respond with next steps and a clear path to your written quote.

A few phone photos from different angles help us understand the grade before we visit.
Typical projects: $5,000 to $20,000. Prices vary by project scope — contact us for a free written estimate.

Water Problems Rarely Start at the Wall

Most wet yards — and half the failing retaining walls we see — start with water that should never have arrived. A downspout dumping at the foundation. A yard graded toward the house instead of away. A low spot that collects every storm. French drains and regrading fix the water's path so your wall, your foundation, and your yard stop fighting it.

What We Install

Drainage System Components

A proper French drain is a system, not a trench with gravel:

Grading: The Dirt-Work Fix

Sometimes the right answer is not pipe but dirt. The rule is simple: within the first several feet of any structure or wall, the ground should fall away at a steady pitch. We see countless yards where the grade is flat or — worse — pitches toward the house or wall, delivering every storm's water to exactly the wrong place. Regrading reshapes the surface so water leaves on its own, no pipe required. It is often the cheapest effective drainage fix there is, and we recommend it whenever the site allows.

Downspouts: The 800-Pound Gorilla

A single downspout can deliver hundreds of gallons in one storm. When four of them discharge at the foundation or at the top of a retaining wall, no behind-wall drain was sized for that — because it should not have to be. Extending downspouts past the problem zone, or tying them into buried solid pipe that carries roof water to daylight, is the highest-return drainage dollar most homeowners ever spend. We do this as standalone work and as part of every wall project.

Our Process: Drainage and Grading Projects

Here is what to expect, step by step:

  1. Site visit and water mapping. We trace every water source — roof, surface, groundwater, neighbor — ideally during or just after rain. Your photos of wet conditions are gold.
  2. System design and written quote. Collection, conveyance, and outlet designed as one system; priced as one number with each component line-itemed.
  3. Utility marking. We call in locates and hand-dig near marked utilities. Hitting a line is not an acceptable risk.
  4. Installation. Trenches to grade, fabric, stone, pipe, connections, cleanouts, outlets — built to the design, not improvised.
  5. Grading and restoration. Surface regraded for positive drainage, trenches compacted and restored with sod or seed.
  6. Testing and walkthrough. Water-tested where possible; every outlet and cleanout shown to you; maintenance explained (which is minimal).

Drainage Around Retaining Walls

Water arriving at the top of a retaining wall is water the wall's drain has to handle. Cutting that flow off at the source — with grading and drains above the wall — is often cheaper and more effective than upsizing the wall's own drainage. When we build walls, we design the yard drainage and the wall drainage as one system. Our drainage guide explains the full picture.

Got a wet yard, a soggy wall base, or water where it should not be? Tell us about it — photos help a lot.

Frequently Asked Questions

How do I know if I need a French drain?

Standing water that lingers days after rain, a perpetually soggy strip of yard, water seeping at the base of a wall, or mulch washing away in the same spot every storm — all classic signs.

Where does a French drain send the water?

To daylight at a lower point on your property, or tied into a storm drain where allowed. A drain with nowhere to outlet is just a buried sponge — we design the outlet first.

Will grading alone fix my wet yard?

Sometimes. If the problem is surface water flowing the wrong way, regrading is the right fix. If groundwater is surfacing, you need pipe. The site visit tells us which.

Do French drains clog?

They can, over many years, if built without filter fabric or with the wrong stone. We build with fabric-wrapped pipe and clean washed stone — the combination that stays open.

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