Foundation installation in Garden Grove CA - a level base your walls can stand on

Yes, unless it's on the city's short list of exceptions, such as a one-story room addition or an ADU up to 1,200 square feet, because Garden Grove requires a soils report from a geotechnical engineer for all other projects. The city says the whole city sits in a liquefaction zone, which is why the rule reaches so far, and any project in a designated flood zone needs the report even if it would otherwise be exempt. If you're exempt and building a slab, the city still wants the topsoil taken out and replaced with clean, compacted fill before trenching. The city publishes this as its current rule, so it's worth checking the version in force with the city before your design starts.

A slab usually suits a flat lot, and a crawl space usually suits uneven ground, so the shape of your lot does most of the deciding. A national cost guide rates a slab as good for moisture control but not ideal for graded land, and a crawl space as great for uneven ground but prone to moisture problems. Your soils report or engineer will settle the final call, and we build whichever design comes out of it.

Start by getting a letter from a California licensed geotechnical engineer, or a civil engineer who practices soil engineering, before design begins. The city requires that letter for a second story built over the existing footprint, because the engineer has to check whether your current foundation and soil can carry the added weight. I can help you get that lined up early so your architect isn't waiting on it.

The cost comes down to the size of the footprint, slab versus raised, how much soil has to be dug out and replaced, and how much steel and depth the engineer's design calls for. A sloped lot, a tight side yard or a design that calls for deeper footings all add work, while a flat, open lot keeps things simpler. The written estimate after I see your lot gives you the number for your job.

Hire a licensed contractor who does concrete work, because California's contractor licensing board describes a concrete contractor as one who forms, pours, places and finishes concrete. We're licensed and fully insured, and builders call us for footings and slabs they can frame on, along with the homeowners who make up most of our calls. Your engineer sets the design, and we build to it.

Keep water away from the soil around it, with ground that slopes away from the house and downspouts that carry rain well off. Engineering notes on clay soils also advise setting heavily watered plants and lawns back from the walls, since soaked soil next to a foundation is what you want to avoid. I'll point out where your yard needs it when I walk the finished work with you.