Room additions on an existing house
An addition needs its own foundation sitting right beside the old one, so we look at the existing house and the ground next to it before we suggest a type.
Foundation installation in Chino Hills CA - a base that fits how your lot sits
Adding a room or building on a sloped lot? We fit the foundation to your ground and plan the ground work before anything's poured.
- Licensed and insured.
- Free estimates at your property.
- We respond within 1 business day.
What goes into a new foundation
Foundation installation in Chino Hills means forming, pouring and finishing the concrete base a house, addition or garage sits on, and Quality Chino Hills Concrete Company builds them for homeowners here and in the cities around it.
I'll start with the uncomfortable part. Some foundation jobs need more than folks expect, and most of that money goes into ground work you'll never see again, so what moves your price is mostly in the ground, like whether the lot slopes, how much digging and packing it needs, which foundation type fits, how big the footprint is and whether site studies have to come first.
The schedule turns on what happens before the pour more than the pour itself, mainly permit review, any studies the site needs, the inspections and the weather on pour day. Your written estimate spells out what's included and what isn't, so you can see where the money goes before you sign.
I see every job myself
I look at your lot and write the estimate myself. A crew lead and our crew do the work, and I stop by while it's going, so the person who priced it sees it built.
Straight talk about cracks
Concrete cracks and slabs move, even on a good job. I'd rather tell you that at the kitchen table and explain what keeps cracks small than have it come up after the pour.
Licensed, insured and easy to check
We're licensed and insured. The city tells residents to do their homework before hiring and points them to the Contractors State License Board, which licenses concrete contractors for forming, pouring and finishing work.
How we plan and pour your foundation
How your lot sits steers the foundation type, so I look at the ground before we talk options. A slope, a flat pad or a low spot where water sits after rain each pushes the choice one way, and I'd rather you hear why on site than pick from a list.
We plan the ground work as its own part of the job, before anything gets poured, because a foundation only holds up as well as the ground under it. Our crew digs out and packs the subgrade, the soil the concrete sits on, checks where the water runs so it heads away from the house, and forms the concrete footings, the deeper concrete under the walls that carries the weight, where the design calls for them. Rebar, the steel set inside the concrete, goes in next so a crack that does form stays tight.
The ground work is also what people want to cut first, because nobody sees it once the concrete's down. I side with the base over a fancier finish, since a nice surface on a poorly packed base settles right along with the dirt, and it's the same reason concrete parking lot building lives or dies on what's underneath. We pour outside the midday heat when we can, because concrete that dries too fast ends up weak and dusty on top, then we let it cure, the wait while it gains strength, before anything gets built on it.
Projects that start with a new foundation
New homes and rebuilds
A whole house starts with the foundation, and the type follows your lot and the plans your designer or engineer draws up. We pour to those plans and work through the inspections.
Detached garages and workshops
A garage or shop slab carries cars, tools and walls, so it gets the same dug-out, packed base and steel as a house, not the quick prep a patio might get.
Backyard units and guest houses
A backyard unit is a small house, and it needs a real foundation under it. We fit the type to that spot in the yard and plan around access for the crew and trucks.
Get a written foundation estimate for your lot
Send the form and we'll reply within one business day. I'll come out, look at your lot and give you a free written estimate showing what's included and what isn't, with no pressure to book.
Your property address
The address tells me where the job is and lets me get a first look at how the lot sits before I come out, so our visit goes straight to your questions.
What you're building
A room addition, a new house, a garage or a backyard unit each need something different underneath, so a line about the project helps me bring the right questions.
Whether the lot is graded or uneven
A flat pad and a sloped yard lead to different foundation types and different ground work, so a quick note on this lets us talk real options from the start.
Concrete foundation and slab work examples
These photos show slab, footing and driveway layouts and finishes you can point to when we talk about your own project.
Foundation questions we hear in Chino Hills
Here are straight answers to what homeowners ask us most about foundation types, permits, plan review and building on tricky ground.
Is a slab or a crawl space foundation better for my lot in Chino Hills?
A slab usually wins on moisture control, and a crawl space usually wins on uneven ground. A slab isn't ideal for graded land, while a crawl space handles slopes well but is more prone to moisture problems. The shape of your lot and how much damp worries you steer the choice, and we'll weigh both with you on site.
Who issues building and grading permits in Chino Hills?
The city's Building and Safety Division issues both and does plan review digitally. Once a permit is active, the division sends inspectors out while the work is underway. When your foundation needs a permit, we handle the application with that office and set up the inspections, and if we're not sure what applies, we check with them before we start.
How long does plan review take for a room addition in Chino Hills?
Plan review for room additions and remodels in Chino Hills generally takes 15 business days, and bigger projects take longer. Additions and remodels also need a separate submittal to the Chino Valley Independent Fire District, so plan on two offices reviewing the job. We build that wait into the schedule before we set a pour date.
Does an earthquake hazard zone change my foundation project in Chino Hills?
Yes, if your lot sits in one. California's earthquake hazard zones mark areas where fault rupture, landslides or liquefaction, when soil briefly acts like quicksand, are more likely, and building there triggers geologic and engineering investigations before construction. For new construction or big remodels, those site studies show what to work around or what protection to build in, so they shape the ground work and the timeline.
What kind of foundation works on soil that shrinks and swells?
Ask about a post-tensioned slab, which has steel cables inside pulled tight once the concrete sets. The trade group for this method presents it as a cost-efficient, high-performance choice for houses on ground that shrinks and swells, and says it reduces cracking and keeps any cracks tight, limiting bug entry and water that damages floors and causes mold. We'll talk through whether it fits your site.
Do I need a vapor barrier under a new foundation slab?
Under the floors you'll live on, that's the usual advice. Concrete guidance calls it sensible planning to put a vapor retarder, a sheet that blocks ground moisture, under every interior floor slab, and says one generally isn't needed under outdoor slabs on grade. It keeps damp from working up through the concrete into your flooring.
Related concrete work for your foundation
Have me look at your lot first
Call (909) 308-0181 or send the form, because the sooner I see your ground, the sooner permits and any site studies can get started.