Concrete retaining walls in Santa Clara CA - a wall that holds the slope and drains

Most calls start with something you can see. Dirt slides onto the walk every time it rains, an old wall leans or cracks, or you'd like a level patio where the yard slopes. The price moves mostly with the wall's height and length, how deep the footing goes, which is the concrete base the wall stands on, how much soil has to be dug out and how easily our crew and the concrete truck can reach the spot. The schedule turns on whether the wall needs an engineer's design or a city permit, and on curing, the wait while the concrete gains strength before soil goes back against it. I measure it on site, and the estimate writes out what's included so you can see exactly what you're paying for.

I start by measuring where the wall will go and looking at where water runs on your lot, because a wall's footing, steel, depth in the ground and drain come from a design or the code, not from its height alone. When a wall needs an engineer, we bring one in and build from their plans, and you should tell us early about any driveway or heavy load planned near it, because that changes the design. Our crew digs out and packs the base for the footing, then sets the forms and the rebar, the steel bars that keep the wall from bending under the soil's push, and I'm there on pour day so the prep is done before the truck shows up. The drain behind the wall matters as much as the wall itself, so we build it with care, and a sound setup usually has drainage gravel, filter fabric to keep soil from clogging it and perforated pipe that carries water out to the outlets, which I show you so you know what to keep clear. Once the wall has cured and has the strength and bracing to take the load, the backfill, the soil that goes back behind it, usually goes in thin packed layers with equipment light enough not to shove on a young wall.

Leveling a slope often makes room for something else. If that's a pool, we can pour concrete pool decks in the same project and set the grades so water runs away from both the deck and the wall, and if it's a shed or a shop, concrete floor installation gives it a slab to sit on.

In Santa Clara, the city's Permit Center issues building permits for retaining walls more than 4 feet tall, and that height runs from the bottom of the footing to the top of the wall, so a wall that looks short from the yard can cross the line once you count what's underground. After a permit is issued, the city's Building Division inspects the work to make sure it matches the approved plans. We look into permits while we put the estimate together and check with the city for your address, shorter walls included, and when we're the ones pulling the permit, we handle the paperwork and the inspections.

The ground here matters too. Regional hazard maps that include Santa Clara show where wet, sandy soil may go through liquefaction, turning soft and liquid-like in strong shaking, and crack the ground. Those maps are regional, so only borings, test holes drilled into the soil, can judge the hazard on one lot, and in a state hazard zone the local permit process may require a study and steps to reduce the hazard. We're based in Santa Clara and work across the cities around it, and we build walls on sloped yards in Los Gatos and Saratoga with the same care for the footing and the drain.