Retaining Walls in Marin and Sonoma County
Engineered stone, block, and timber retaining walls for sloped properties across Marin and Sonoma. Built with proper drainage and grading. Backed by a two-year warranty.
A Recent Novara Retaining Wall Build in Marin
How Novara Builds Retaining Walls in Marin and Sonoma
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Site Survey and Engineering
We measure your slope, calculate load and pressure, and design the wall system in 3D. Walls over four feet get engineered drawings.
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Permit and Excavation
We pull every required permit with your local city office and county. Excavation goes deeper than most contractors realize. Frost line, footing, and drainage all matter.
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Drainage and Construction
Gravel backfill. Drainage pipe behind every wall. Geogrid reinforcement on tall walls. The drainage system is what makes a wall last thirty years instead of five.
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Final Inspection and Walkthrough
City inspection passed. Final grade and softscape integration. Two-year workmanship warranty activated. Walkthrough with you on site.
All Novara Landscape and Hardscape Services in Marin and Sonoma
Every Novara service is built to work together. Browse our full range and combine what fits your property.
Full Outdoor Builds
Complete property transformations from initial 3D design through final installation.
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Patios
Natural stone, paver, and flagstone patios built on a proper base.
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Retaining Walls
Engineered retaining walls in stone, block, and timber for sloped properties.
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Driveways
Paver, concrete, and stamped driveways with proper drainage and grading.
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Concrete
Concrete walkways, slabs, and foundations finished clean.
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Planting and Softscape
Native and ornamental planting, lawn installation, and full softscape design.
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Wood Hardscapes
Pergolas, fences, decks, and custom wood structures built to last.
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Gardening
Ongoing garden care, seasonal planting, and property maintenance.
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Irrigation and Lighting
Smart irrigation systems and low-voltage landscape lighting design.
Learn More →Real Reviews from Marin and Sonoma County Homeowners
Every Mill Valley project we build comes with a story. Here is what our clients say in their own words.
Why Marin and Sonoma Homeowners Trust Novara for Retaining Walls
28+ Years
Building since 1998
Drainage-Engineered
Built for the rain
Licensed C-27
#1134876 California
2-Year Warranty
On every wall
Retaining walls across Marin and Sonoma are not decorative. They hold yards, driveways, and homes in place during winters that drop several inches of rain a week. California requires a C-27 licensed contractor for engineered walls, and walls over four feet require permits with engineered drawings. The drainage system behind a wall is where these walls live or die. Uncontrolled hydrostatic pressure during a rainy stretch is what topples walls that looked fine for a decade. Every wall we build includes a drainage spec engineered for the specific slope, soil, and water flow on that property. Gravel backfill. Perforated drain pipe. Geotextile fabric. Geogrid reinforcement on tall walls. The wall you can see is the proof. The systems behind it are the reason it stays standing.
Novara Retaining Wall FAQ
Do I need a permit for a retaining wall?
Any retaining wall over four feet measured from the bottom of the footing requires a permit across Marin and Sonoma. Walls supporting a driveway, structure, or surcharge load require permits regardless of height. Engineered drawings are required for permitted walls. We pull every permit and submit every drawing on your behalf. See our full process here.
What materials work best for Bay Area retaining walls?
Three materials handle the conditions across Marin and Sonoma well. Natural stone is the most durable and most expensive, with the highest resale appeal. Segmental concrete block is the most common, strong, predictable, and available in modern finishes. Pressure-treated timber is the most affordable and works for shorter walls in lower-stress applications. We talk through which fits your slope, budget, and aesthetic during the consultation.
How long does a retaining wall last?
A properly built retaining wall lasts thirty years or longer. A wall built without proper drainage fails in five to ten years. The drainage system behind the wall, gravel backfill, perforated drain pipe, geotextile fabric, is what determines lifespan. The wet winters across Marin and Sonoma put hydrostatic pressure behind every wall. Our walls drain that water out instead of letting it build up.
Can a retaining wall fix erosion on my property?
Yes. Erosion on slopes across Marin and Sonoma almost always comes from uncontrolled water runoff and unstable soil. A properly engineered retaining wall combined with grade work, drainage, and replanting handles both problems together. We often pair retaining walls with new planting and softscape to stabilize the slope above the wall.
How long does a retaining wall installation take?
A small wall under four feet takes one to two weeks. A larger engineered wall with permits, drainage, and geogrid reinforcement takes three to six weeks. Permit timelines with your local city office add two to four weeks before excavation can start. We give you a clear schedule before any work begins.
Will a retaining wall change how my yard drains?
Every retaining wall changes drainage. That is why proper drainage design is built into every wall we install. Surface water above the wall gets directed away. Subsurface water behind the wall gets routed through drain pipe to a safe outlet. We map drainage paths during the 3D design phase so nothing surprises you after the wall is built.
What kind of warranty comes with a Novara retaining wall?
Every retaining wall comes with a two-year warranty on workmanship covering structural integrity, drainage performance, and base settlement. Manufacturer warranties on materials transfer to you separately. If anything we built fails within those two years for reasons not caused by extreme weather events or owner alterations, we come back and fix it at no cost.
How do I get started with a retaining wall project?
Call us at (707) 494-8197 or request a free consultation here. We schedule a site visit at your property anywhere across Marin and Sonoma County, walk the slope together, talk through material and engineering options, and follow up with a 3D design preview and written estimate within two weeks.