A thin vertical crack in a foundation is common in older Oakland homes. A wide, stepped or growing crack needs a structural engineer. We pour and repair concrete. We do not diagnose house structures, and on hillside and fault-zone properties an engineer's opinion is worth its fee.
Every price range on this page is a national figure published by HomeGuide for 2026. None of them is a quote from us. Bay Area labor, ready-mix prices, access and the condition of your lot move the real number. Last checked October 2026.
Are cracks in my foundation serious or cosmetic?
Thin, straight, vertical cracks in a foundation are usually cosmetic shrinkage. Signs that a crack is serious include a width greater than about a quarter inch, one side offset from the other, a diagonal or stair-step path, doors and windows that stick, sloping floors, or a crack that grows from one season to the next. Many pre-war Oakland houses also have shallow, unreinforced foundations that were never bolted to the frame, which is a seismic retrofit question for an engineer.
My front steps are pulling away from the house. What causes that?
Steps pulling away from the house are usually settling on their own, because they were built on shallow fill and not tied to the foundation. On a slope they can also be creeping downhill. If the steps are sound they can sometimes be lifted and the gap sealed. If they are cracked or tilted, rebuilding them on a proper footing is safer. A gap that widens quickly on a hillside lot should be seen by an engineer.
My garage floor has dropped on one side. Is that a leveling job or a foundation problem?
It can be either. In many homes the garage floor is a separate slab that floats inside the foundation walls. When that slab has dropped and the walls show no new cracks, it is normally a soil issue under the floor and a leveling or replacement job. If the walls are cracked, the door frame is out of square or the floor is part of the foundation, have a structural engineer look first.
My retaining wall is leaning after heavy rain. Is it dangerous?
Treat a retaining wall that is leaning as a warning. Saturated soil is far heavier, and a wall with blocked or missing drains takes the full push. Keep people and cars away from the low side, clear any weep holes you can reach safely, and get it inspected soon. Oakland hillsides have a history of slides in very wet winters, so a wall that has moved after a storm should not wait until summer.
How much does foundation repair cost?
National published figures are $250 to $800 for minor crack repairs, $2,000 to $12,000 for fixing foundation leaks, and $4,500 to $20,000 for settling, sinking or bowed walls. Hillside sites cost more to reach and to engineer, and we have no local published figure.
I was quoted $18,000 for piers and $1,500 to seal a basement wall crack. Which is right?
They are answers to two different problems. The $1,500 seal stops water coming through a crack. The $18,000 pier job stops a foundation from moving. Which you need depends on whether the wall is still moving. Pay a structural engineer who does not sell repairs to tell you. That fee is small beside either quote.
My basement or slab floor leaks or shows white powder. What is it?
The white powder is efflorescence, mineral salts left when water passes through concrete and evaporates. It means moisture is getting in. Homes cut into a hillside take water against the uphill wall all winter. Start outside: gutters, downspout outlets, surface grading and a drain along the uphill side. Coatings on the inside come after that, not before.
Does homeowners insurance cover a retaining wall or slab?
Often it does not. Standard policies commonly exclude earth movement, settling and landslide, and earthquake cover is a separate policy in California. A sudden event such as a vehicle strike or a burst pipe may be treated differently. Only your insurance policy and your agent can answer for your home, so ask before assuming.
Do foundations here need to go below a frost line?
No. Frost depth drives footing design in cold states, but the ground in Oakland does not freeze. Here the plans and the California Building Code set footing depth from the soil, the slope and the seismic loads, and the City inspects the steel before the pour.
The only real price for your job comes from a free visit, a tape measure and a written quote. Call (510) 694-1913 or text us a photo of the area.