CubicTally.My project ↗
Seattle–Tacoma–Bellevue

Gravel French drain cost
in Seattle.

Estimate aggregate for a rectangular or trapezoidal drainage trench. Start with the published examples below, then use your own supplier quote for a delivered estimate.

7/8-inch drain rock — $68 per cubic yard

Material price. Supplier pickup rate for full cubic yards. Half-yard pickup pricing differs. Confirm your material specification.

Listed delivered rate is $83 per yard, with a 12-yard gravel maximum. Delivery requires 10 total yards, in whole-yard increments; eligible mixed loads can meet that minimum. Distance/access fees may apply; confirm taxes and service area.

Sky Nursery · checked 2026-09-14 ↗
MEASURE. PLAN. BUILD.

Make it your estimate.

Set your dimensions below. Apply a researched supplier rate in supplier options, or enter your own quote.

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No sign-up. No guesswork.
ConcreteSlabs, patios & footingsGravelDriveways, paths & basesMulchGarden beds & landscapes
01

Your dimensions

YOUR TRENCH IN 3DIllustrative · not to scale
Top width 12 ftLength 20 ftBottom width 6 ftDepth 4 in
Aggregate layerDepth exaggerated for clarity
Allow a little extra

For uneven ground, spillage, and the unexpected.

Material & project assumptions

Density and bag values are editable planning assumptions. Confirm the product label or supplier specification.

Reinforcement quantities follow your inputs, not a structural design. Base volume excludes its own waste and compaction. Trench fill does not subtract pipe displacement.

02

Bagged or bulk?

Same project. Two ways to get it done.

THE BAGGED APPROACH
126 bags

6,300 lb to transport and handle.

Material estimateAdd your price
THE BULK APPROACHLess handling
2.5 cubic yards

1 estimated load at your truck capacity.

Bulk estimateAdd your price

Prices are optional. Tax and additional charges are included only when explicitly entered or covered by the saved terms. Placement labor is excluded. Estimates are not supplier quotes.

User-entered supplier prices; delivery and tax require confirmation.

No detailed supplier conditions were saved. Confirm delivery and other charges before ordering.

Supplier order terms

Amounts are flat dollar charges for this order. Leave unknown charges blank; enter zero only when confirmed. Weight limits use your entered density. Choosing another supplier clears these quote fields and the delivery location.

Your entered unit price, rounding, delivery, and short-load assumptions apply. Saved supplier minimums and brackets are not automatically enforced in manual quote mode.

Supplier prices & delivery rules

Set an optional weight capacity under Supplier order terms; loads use whichever volume or weight limit is lower. Confirm the payload limit and material density with your supplier. Short-load fees apply to each load below your threshold. Base material and rebar costs are excluded.

Entered delivery fees: $0.00 · Short-load fees: $0.00

Use a researched supplier price

These are product-specific examples, not regional averages. Applying one sets the listed unit rate. Review delivery, minimum-order and density terms before using the totals. Editing the unit rate switches to manual quote mode.

7/8-inch drain rock · $68.00/yd³

Material price. Sky Nursery — Supplier pickup rate for full cubic yards. Half-yard pickup pricing differs. Confirm your material specification.

Listed delivered rate is $83 per yard, with a 12-yard gravel maximum. Delivery requires 10 total yards, in whole-yard increments; eligible mixed loads can meet that minimum. Distance/access fees may apply; confirm taxes and service area.

Reviewed applications: Gravel French drain.

Source · checked 2026-09-14 ↗
03

Your project, together

0 / 50 sections

A patio. A path. The whole picture.

Add your first section to keep all your materials in one place.

A GOOD ESTIMATE STARTS HERE

Know what goes
into your numbers.

Every estimate shows its assumptions. Adjust waste, material density, and delivery rules to match your job. Use your supplier’s actual prices for a more useful comparison.See how we calculate

2.33 yd³ incl. allowance