Excavation & Grading in Chilliwack

The City of Chilliwack requires a building permit for retaining walls over 1.2 metres in height and for any structure in an environmentally sensitive area or flood plain. Promontory has a hillside development permit area with additional requirements. Agricultural Land Reserve (ALR) properties have their own restrictions on hardscape that we verify before quoting.

Most of Chilliwack (Sardis, Garrison Crossing, Fairfield Island, Chilliwack Proper) sits on Fraser River silty alluvium, which is fertile but compressible. Promontory and Chilliwack Mountain are glacial till with rock. Yarrow, Rosedale, and Greendale are flood plain alluvium with high water tables. This is why every Trueform excavation & Grading project in Chilliwack starts with an onsite soil assessment before we finalize base depth, drainage, and reinforcement.

Chilliwack averages 1,650 mm of annual rainfall but with a wider winter to summer swing than western Fraser Valley cities, and summers can be legitimately dry, stressing plantings and shrinking clay. The Chilliwack outflow wind, funneled through the valley, is a real factor on exposed hillside lots and affects pergola and screen designs. Our excavation & Grading installations are designed for these specific conditions. Drainage capacity, freeze thaw movement, and seasonal load are all factored into the spec for every Chilliwack project.

We complete excavation & Grading projects across all of Chilliwack, including Sardis, Promontory, Garrison Crossing, Vedder Crossing, Fairfield Island, Yarrow, and also Rosedale, Greendale, Little Mountain, Chilliwack Mountain, Rosedale-Popkum, Chilliwack Proper. If your Chilliwack address isn't on this list, we still serve it. Call (604) 217-8966 to confirm.

In Sardis, never skimp on base depth. Use 8 inches minimum for patios and 10 to 12 inches for driveways because of the alluvial compressibility. In Promontory, assume engineering is required. In Yarrow and Rosedale, budget for realistic elevation grading to keep hardscape above seasonal flood lines.

Excavation costs depend on volume, material type, site access, and disposal requirements. Small scale excavation (patio prep, planting beds) costs $50 to $100 per cubic yard. Large scale excavation with machine work and hauling runs $30 to $60 per cubic yard. Full yard regrading for a typical residential lot costs $3,000 to $10,000 depending on the extent of work. Compaction is included in all our excavation services. In Chilliwack specifically, the cost driver to watch is the soil and access combination. In Sardis, never skimp on base depth. Use 8 inches minimum for patios and 10 to 12 inches for driveways because of the alluvial compressibility. In Promontory, assume engineering is required. In Yarrow and Rosedale, budget for realistic elevation grading to keep hardscape above seasonal flood lines. We give you a transparent itemized estimate after the onsite visit so there are no surprises once the excavation & Grading build starts.