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Serving San Anselmo, CA and surrounding areas. (415) 723-8059
Sticking doors, cracked walls, uneven floors - these are warning signs your foundation is moving. We find the cause and fix it properly, so the problem does not come back next rainy season.
Foundation repair in San Anselmo covers a range of fixes designed to stop your home from shifting further - most residential jobs here take one to three days and address soil movement, structural cracks, or deteriorated supports beneath the floor system.
For many San Anselmo homeowners, the problem starts underground. Marin County sits on clay-heavy soils that swell when the winter rains arrive and shrink back during dry summers. That repeated movement gradually pushes and pulls at your home's base until cracks appear, doors stop closing, or floors start to feel uneven. Surface-level patching alone rarely solves it for good.
If your home was built before 1970 - and many in this neighborhood were - the foundation may never have been evaluated under today's standards. A related concern is chimney repair, since older chimneys and foundations often share the same era of construction and the same soil movement risks.
If doors or windows have started dragging or no longer latch properly, your foundation may have shifted beneath them. In San Anselmo's older homes, this symptom tends to appear gradually in one room, then spreads to others. It is easy to dismiss as a humidity issue - but if it happens in multiple spots, the foundation is worth a look.
Diagonal cracks running from the corners of door frames toward the ceiling are a sign of foundation movement, not just normal settling. On San Anselmo's clay soils, these cracks often appear or worsen after a wet winter. A crack that was hairline last spring and is now wider than a pencil tip is telling you something has changed.
Walk around the outside of your home and look at the concrete at ground level. Horizontal cracks are especially concerning because they can indicate the foundation wall is being pushed inward by soil pressure - something that happens more often on hillside lots, which are common in San Anselmo. Vertical cracks may be less urgent but still warrant a professional opinion.
After a heavy rain, check your crawl space if your home has one. Standing water, damp soil, or white mineral deposits on the concrete are signs that water is finding its way in. Given how much rain San Anselmo receives between November and March, persistent crawl space moisture is one of the fastest ways to weaken a foundation over time.
Every foundation job starts with a thorough assessment - we walk the perimeter, check the crawl space, and look at interior symptoms before recommending anything. From there, the scope of work depends entirely on what is actually causing the movement. For homes with cracked or deteriorating concrete stem walls, we repair and reinforce the existing structure. For properties with settlement caused by unstable soil, we install support piers that transfer the load down to stable ground. We also handle foundation block wall installation when a new or replacement structural wall is needed.
Drainage is always part of the conversation. In San Anselmo, poor drainage is often what accelerates foundation damage, and addressing it alongside the structural repair is the difference between a fix that holds and one that fails again. We handle permit applications with the Town of San Anselmo's Building Division and coordinate the required inspections - so the work is documented correctly for your records and for any future sale of the home.
Best for homeowners with minor to moderate cracking who want to stop moisture intrusion before it causes larger damage.
Suited for homes with significant settlement or sinking, where the soil beneath the foundation has lost its ability to support the load.
For properties with cracked or bowing concrete walls where the structural integrity of the perimeter needs to be restored.
Recommended for older San Anselmo homes where the wood frame is not yet anchored to the concrete foundation - often combined with foundation repair work.
For homes where moisture intrusion through the crawl space is contributing to wood rot, mold, or ongoing foundation movement.
A starting point for homeowners who have noticed warning signs but are not yet sure what they are dealing with or how urgent it is.
San Anselmo sits in a valley surrounded by hills, and its combination of clay-heavy soils, steep lots, and 40 inches of annual rain creates foundation conditions that are different from most California cities. Many homes in town were built between the 1920s and 1960s on foundations that were never designed to handle what we now know about soil movement and seismic risk. The result is that foundation problems here tend to be interconnected - drainage, soil behavior, and structural age all play a role in the same repair.
Homeowners near Fairfax and San Rafael face similar conditions - clay soils, hillside drainage, and older housing stock - and we work throughout this corridor of Marin County. The California Earthquake Brace + Bolt program offers rebates for qualifying seismic retrofits, which often make sense to combine with foundation work when both are needed.
We respond within 1 business day. When you reach out, we ask a few quick questions about what you have noticed - sticking doors, cracks, moisture - and schedule a free on-site visit at a time that works for you.
We walk the perimeter, inspect the crawl space, and look at interior symptoms. At the end of the visit, you get a plain-language explanation of what we found and what we recommend - before any work is proposed.
You receive a written estimate spelling out exactly what will be done and what it will cost. If a permit is required - which it often is in San Anselmo for structural work - we handle the application with the town's Building Division.
Most residential jobs take one to three days. The town inspector signs off on the permit at completion. We restore the work areas and do a walkthrough with you before we leave.
We respond within 1 business day. There is no obligation - just a free on-site look at what is going on. After you submit, someone from our office will call to schedule your free estimate at a time that works for you.
(415) 723-8059San Anselmo requires building permits for structural foundation work, and the permit process with the town's Community Development Department can be confusing on your own. We manage the application, coordinate inspections, and make sure the job is documented correctly - which matters both for your safety and when you sell the home.
Every job we do is backed by a California contractor's license and full general liability insurance. You can verify our license on the California Contractors State License Board website. That credential matters: it means your repair meets California building standards and that you have legal recourse if something is not right.
Marin County's clay-heavy soils create foundation conditions that differ from most of California. We understand how the wet-dry cycle here drives movement, and we factor drainage into every repair plan - not just the visible structural damage. Surface patching alone does not work in this soil environment, and we do not recommend it.
We are a local contractor, not a large company dispatched from another county. We know the town's building department, its permit timelines, and the specific foundation challenges that come with Marin's hillside lots and older housing stock. When something comes up after the job, we are nearby and available.
These are not abstract claims. They are the specific reasons San Anselmo homeowners call us back for follow-up projects and refer us to neighbors. If you want to check our license or ask about a specific job, we are happy to talk through the details before you commit to anything.
Crumbling mortar, a missing cap, or water stains near the fireplace all signal chimney issues that worsen through Marin winters - get them fixed before the rains arrive.
Learn MoreNeed a new foundation block wall for a garage, addition, or retaining structure? We build durable CMU walls designed for San Anselmo's soil conditions and permit requirements.
Learn MoreFoundation problems do not fix themselves - and in San Anselmo's wet winters, small issues become expensive repairs fast. Call today for a free on-site estimate.