Foundation installation in Duarte CA - the right support under your house

There's no fair number until I've seen the lot, because the price turns on the size of the footprint, how deep the support has to go and how much digging and steel that takes. Deep support that needs drilling costs more than a shallow footing, a backyard a truck can't reach adds hand labor, and in Duarte, grading, drainage, plumbing and electrical work each need their own permit apart from the building permit. The estimate gives you a written figure for the system you choose.

Some properties with a Duarte mailing address actually fall under L.A. County, generally the ones west of Mountain Avenue and south of Duarte Road. The city sends those owners to the L.A. County Department of Building and Safety at 626-574-0941. We check this for every job before scheduling, and since we're based in Duarte and work in the cities around it, we work on both sides of that line.

Start with what's under the lot, then weigh what each system costs against the risk it carries. Guidance from an engineers' group in another part of the country, written back in 2004, says shallow systems usually carry more risk than deep ones but often get picked because they're cheaper, and international research on shrink-swell soils, the kind that heave when wet and settle when dry, finds that movement often goes past what a house can take. That's why the soil question comes before design, not after.

On a home improvement job, the state licensing board caps the down payment at $1,000, and less on a smaller contract, even when the foundation is a big job. After that, each payment in the contract has to match work already done or materials already delivered, so ask to see how the contract lists them. We're insured, and our work is backed by our satisfaction guarantee.

The city can issue a building permit to a general building contractor with a Class B license, or to a homeowner improving their own main residence who meets the owner-builder conditions. If your lot needs drilled piers, the state has a separate license class for that drilling. We're fully licensed, and I'll go over who pulls the permit on your job when I come out.

It means your lot sits in an area the state has mapped for possible liquefaction, where shaken ground turns soft, or earthquake-triggered landslides, or both. Building in one of those zones can mean the permit office asks for the hazard to be investigated and dealt with as part of the permit. The map shows an area, not a verdict on your lot, so we find out what your office wants before anything is designed.