Serving Redwood City, CA and surrounding areas. (650) 587-4237
Settled concrete is a common problem in Redwood City. We lift sunken slabs back to level in hours, not days - no demolition, no week-long job site in your yard.
Foundation raising in Redwood City lifts sunken or uneven concrete slabs by pumping material through small drilled holes into the void beneath - the contractor injects either a cement slurry or expanding polyurethane foam until the slab rises back to level, patches the holes flush with the surface, and the area is ready to use the same day on most residential jobs.
If you have a driveway section that sits an inch lower than the one next to it, a garage floor that slopes toward the wall, or interior floors that have slowly developed a noticeable lean, foundation raising addresses the cause directly - the void beneath the concrete - rather than patching the surface and leaving the problem in place. Many Redwood City homeowners discover this issue after a wet winter or a dry summer, when the clay soils that underlie much of the city have shifted and pulled support away from the slab.
When settling is caught early, raising is usually the right call. If the concrete is crumbling or broken into multiple pieces, full replacement may be a better investment - and we will tell you that honestly during the estimate. For projects that involve replacing the slab as part of a new foundation, our slab foundation building service covers full new pours from grade prep through finishing.
If your interior doors or windows suddenly become hard to open or close after the rainy season, that is often a sign the slab beneath them has shifted. In Redwood City, clay-heavy soils swell with winter rain and can push or drop sections of a slab unevenly. This is not just a door problem - it is a signal that the ground beneath your home is moving.
Walk around the inside of your garage or along the base of your home's exterior. If you can see a gap - even a small one - between the concrete slab and the wall above it, the slab has dropped away from where it was originally poured. This gap tends to grow over time if the underlying soil issue is not addressed.
Stand in the middle of a room on a hard floor and notice whether it feels level. In older Redwood City homes built on slab foundations, gradual settling can create a noticeable slope that worsens over years without any single dramatic event. A ball that rolls on its own across the floor is a classic warning sign worth taking seriously.
Redwood City's dry summers cause clay soils to shrink and pull away from the underside of concrete slabs, creating voids. When the rains return, those voids do not always refill evenly. New diagonal cracks in your driveway or patio - especially ones where one section sits higher than the one next to it - indicate the soil beneath has shifted and the slab needs attention.
Every foundation raising job starts with an on-site assessment. We walk the affected area with you, check the slab for level, look for cracks, and probe the soil around the edges to understand what is happening underneath. From that visit, you get a written estimate that specifies the method, the scope, and what cleanup is included - no surprises at the end. If your job requires a permit through the City of Redwood City Building Division, we handle that paperwork so you are not chasing down approvals on your own.
We use both the traditional mudjacking method and polyurethane foam injection, and we will explain which one makes more sense for your specific slab and soil conditions. The American Society of Concrete Contractors provides the professional standards that guide proper lifting and patching practices. For projects that go beyond raising an existing slab - like replacing a damaged foundation or adding new concrete work alongside the repair - our concrete cutting service handles precise removal of damaged sections before new material goes in.
Best suited for homeowners with larger slabs - driveways, garage floors, or wide patios - where cost efficiency is the priority and the soil conditions are relatively stable.
A better fit for homes with active soil movement or areas near the foundation wall where adding heavy material could worsen soil compression over time.
For garage floors and interior slabs that have developed a noticeable slope or pulled away from the walls - a common problem in Redwood City homes built in the 1940s through 1970s.
Suited to homeowners with uneven driveway panels or patio sections that have sunk below the surrounding grade - eliminating trip hazards and restoring proper drainage slope.
Redwood City sits on clay-heavy soils that swell when the winter rains arrive and shrink back during the dry summer months - a seasonal push-and-pull that is one of the most common reasons slabs settle unevenly here. Add to that the fact that much of the city's housing stock was built between the 1940s and 1970s, when slabs were poured under older standards and have had decades to shift and develop voids beneath them, and you have conditions that make foundation settling a recurring problem rather than a one-time event. The proximity to active fault systems means seismic activity can also accelerate soil movement and widen existing voids, so an issue that seemed stable can change after even a minor earthquake. We work with homes across the city - from flat neighborhoods near downtown served by homeowners in San Carlos to the sloped lots in hillside areas, the local soil and drainage conditions we see on every job inform the method we recommend.
Wet winters create a secondary problem that goes hand in hand with slab settling. Water that pools against a foundation or runs beneath a slab softens the soil and accelerates void formation. If your slab settled after a particularly wet rainy season, drainage improvement often needs to go alongside the lifting work - otherwise the same problem is likely to return within a few years. Homeowners in nearby Belmont face the same conditions, and we regularly work on slab raising projects throughout the Peninsula where drainage and soil movement are the underlying cause.
When you call or submit a request, we ask a few basic questions - where the problem is, how long you have noticed it, and whether there are visible cracks or gaps. This helps us come prepared. We reply within 1 business day and can typically schedule an on-site visit within a week.
We walk the affected area with you, check the slab for level, inspect cracks, and probe the soil edges. You get a written estimate with the recommended method and scope before any work is scheduled - and we flag any drainage or root issues that could cause re-settling if left unaddressed.
If the job requires a permit through the City of Redwood City Building Division, we handle that paperwork. This adds a few days to the timeline but puts the work on record - which matters if you ever sell the home. Once any required permits are in order, we schedule the crew.
The crew drills small holes through the slab at calculated points, pumps material underneath until the slab rises to level, then patches the holes flush with the surface. The whole process usually takes a few hours. Before leaving, the crew walks you through what was done and answers any questions.
We give you a written estimate after seeing the job in person - no obligation, no pressure.
(650) 587-4237Lifting a slab that keeps settling because of uncorrected drainage is a short-term fix. During every assessment, we look at what is causing the void - water patterns, tree roots, soil type - and tell you whether the lift alone will hold or whether additional steps are needed to protect the repair long-term.
Any contractor doing foundation work on a residential property in California must hold a valid license through the California Contractors State License Board. We are licensed, and we pull any required permits before work begins - protecting you from complications when you sell or refinance.
We work regularly in Redwood City neighborhoods where expansive Bay mud and clay soils make foundation movement a recurring issue. Knowing local soil behavior - how it moves by season and how it responds to different lift methods - helps us recommend the right fix for your specific property rather than a one-size approach.
Most residential foundation raising jobs in Redwood City are completed in a few hours. You can walk on the raised area the same day, and drive on a driveway or garage slab within 24 hours. Your yard, your routine, and your driveway stay intact - no week-long job site, no heavy equipment tearing up landscaping.
These credentials matter because foundation work is not something you want to repeat. Getting it done right the first time - with a contractor who understands local soils, handles permits, and addresses the underlying cause - is what protects your investment over the long run.
When a sunken or damaged slab needs removal before new concrete goes in, precise cutting removes only what needs to go - leaving clean edges for the repair or replacement pour.
Learn MoreFor cases where raising is not the right option and a full new slab is needed - complete pours from grade preparation through city permit sign-off.
Learn MoreRedwood City's winter rains make existing voids worse - the best time to act is now, while the ground is dry and the crew can complete the job in a single visit.
