Concrete Contractor in Ontario, CA - Driveways and Slabs That Drain Right
D&T Diamond Bar Concrete is a concrete contractor based in Diamond Bar that pours driveways, patios, steps and slabs for Ontario homeowners and small business owners, with the ground dug out, packed and sloped so water runs away.

Concrete work in Ontariothat starts below the surface
Ontario calls look a lot like the ones we get in El Monte, Pomona and Chino. We see driveways that cracked or sank, patios that hold water, steps that sit uneven, and small business owners who need a lot or a slab poured.
The price moves with size, how much old concrete gets hauled off, how much digging the base needs and the finish you pick. The schedule turns on the permit question and curing, the wait before a new slab can take weight.
Call (909) 760-1399 or send the form, and I'll come out, measure the job and write up what's in the price.
What we pour in Ontariofor homes and small businesses
We bring the full list to Ontario, from home driveways and patios to slabs, footings and lots for small businesses.
- Concrete driveway building When an old driveway has sunk or cracked across, we tear it out, dig down and pack a new base.
- Concrete patio construction Backyard patios sloped away from the house, so rain and hose water run off instead of pooling at the door.
- Stamped concrete services A pattern pressed into fresh concrete for homeowners who want the look of stone without setting stone.
- Concrete sidewalk building Walkways with control joints, shallow cuts that tell cracks where to go, cut on time.
- Garage floor concrete Garage slabs poured thick enough for cars and a workbench, finished smooth so they sweep clean.
- Decorative concrete Color and texture choices for entries and patios, talked through at the estimate so you see the options first.
- Concrete retaining walls Where a yard steps down, we build walls with rebar, steel bars inside that keep the concrete from pulling apart.
- Concrete floor installation Interior slabs for shops, additions and small business spaces that need a flat, level floor.
- Concrete pool decks A broom finish, light grooves dragged across the top for grip, makes sense around a pool where feet are wet.
- Concrete steps construction Front and back steps formed so each one is the same height as the last.
- Slab foundation building Slabs for additions, sheds and workshops, with the subgrade, the ground the slab sits on, dug out and packed first.
- Foundation installation New foundations for additions and outbuildings, formed and poured to the plans for the build.
- Concrete parking lot building Lots for small businesses, graded so water heads for the drain instead of sitting in the parking spaces.
- Concrete footings Footings for walls, patio covers and posts, dug down to firm ground so what sits on them stays put.
- Foundation raising If a slab or foundation has dropped, we look at why it moved before talking about lifting it.
- Concrete cutting Clean cuts for new doorways, plumbing runs or a cracked section, without breaking up the whole slab.
Why Ontario homeowners call usfor slabs that drain and sit flat
I learned flatwork, the driveways, patios and walks poured on the ground, under a contractor around Diamond Bar, and started our business in 2023.
Licensed and insured in California
California's contractor licensing board requires a license for work that needs a building permit or runs $1,000 or more in labor and materials, and we're fully licensed and insured.
The base gets the budget first
If money's tight, I'd rather you skip the fancy finish than skimp on the base, because a pretty top on loose dirt settles and cracks.
The owner on site with the crew
I work alongside our crew on the job itself, so the person who priced your patio is there when the concrete shows up.
We check where the water goes
Before we set forms, we look at where water runs on your lot, so the new slab falls away from the house, not toward it.
Nothing sold you don't need
I'd rather lose a job than sell you something you don't need. Satisfaction guaranteed on every job.
From your call to cleanupthe way D&T runs a job
A concrete job has a lot of moving parts, so I keep them on my side. You make one call, and you deal with me from the first look to the final walkthrough.
Call or send a message
Call (909) 760-1399 or use the form to tell us about the job, and we get back to you to set up a time to come out.
I walk and measure
I come out myself to look at the job and measure, then write an estimate that spells out what's in it and what isn't, like hauling off the old concrete.
Permit check, then the pour
Whether a permit is needed is the city's call, so we check with Ontario's Building Department, handle any paperwork with you, then I'm on site with our crew from forming to cleanup.
Walk it with me
When the forms come off and the site's cleaned up, we walk the finished slab together, and I tell you when it's ready for feet and when it's ready for tires.
What Ontario slabs run intoand what we do about it
What goes wrong with a slab here usually starts underneath it or in the hours after the pour.
Old driveways past patching
Older driveways that have cracked across or dropped at a corner usually come out whole, because patching over a failed base just buys time.
Midday heat on pour day
Concrete poured in midday heat can dry too fast and leave a weak, dusty top, so we pour early in the day.
Cracks in random places
Joints cut late or skipped leave cracks wherever the slab chooses, so we cut them while the concrete is still fresh.
A written estimate for Ontariomeasured on site by the owner
Tell us what you need poured or replaced and roughly how big it is, and we'll reply within one business day. Then I come out to measure for a free on-site estimate, with no pressure and no obligation.
Our work in Ontariofrom a crew based in Diamond Bar
We're based in Diamond Bar and work in the cities around it, Ontario included. In Ontario that means home driveways, backyard patios and steps, plus lots and slabs for small business owners, and each one starts with the ground underneath.
Ontario asks contractors based outside the city to apply for its business license too, through the same application local businesses use, so it's fair to ask anyone you're comparing whether they've done it.
Don't see your city? Call us
If your city has a page below, it covers the work there. If it doesn't, call (909) 760-1399, because these aren't the only cities we work in.




