Concrete Contractor in Duarte, CA - Driveways and Patios Built on Solid Ground
Custom Duarte Concrete is a concrete contractor based in Duarte, CA. We dig out, pack and pour driveways, patios, walkways, steps and other slabs for homeowners and business owners across the city, starting with the ground underneath.

- Service area
- Duarte, CA
- Call
- (626) 416-2143
Homes and yards across Duarte
We're based in Duarte, and most of our calls come from homeowners here and in the cities around it, with some business owners mixed in. The work is mostly driveways, back patios, front walks and steps on houses with their own yards, and a good share of what we tear out was poured over dirt that someone raked flat and called a base. It settles, it cracks and sooner or later it tips water back toward the house. We see the same thing next door in Monrovia and Azusa, so the fix doesn't change much at the city line.
So on a Duarte job the ground gets most of my attention. We dig down to firm soil, pack the subgrade, the layer the slab actually sits on, and set the grade so water runs away from your walls. You won't see any of that once the pour is done, which is exactly why it's the first thing a cheap bid leaves out.
Our services in Duarte, CA
Most Duarte driveways we replace sank because the dirt under them was never packed. On a new concrete driveway, we dig out to firm ground, compact the base and set rebar, steel that keeps cracks tight.
Patios here often pool water against the house because nobody checked which way the slab fell. We set the slope away from your walls before the pour and finish the top for how you'll use it.
Front walks in Duarte lift and crack where they were poured thin over loose fill. We pack the ground, pour a full-depth slab and broom finish it, a grooved texture that keeps wet shoes from slipping.
Front steps here settle unevenly, and one that has dropped an inch catches a guest's toe. We form each step to the same height, set steel inside and seat the whole run on packed ground.
Garage slabs in Duarte homes crack and chip under years of cars and dropped tools. We break out the old floor, pack the ground and cut control joints, grooves that tell the slab where to crack.
Plenty of Duarte jobs start with sawing out one cracked panel instead of the whole slab. We cut clean, straight edges so the new section sits flush with the old concrete.
Every service we offer
Concrete driveway building
Concrete patio construction
Stamped concrete services
Concrete sidewalk building
Garage floor concrete
Decorative concrete
Concrete retaining walls
Concrete floor installation
Concrete pool decks
Concrete steps construction
Slab foundation building
Foundation installation
Concrete parking lot building
Concrete footings
Foundation raising
Concrete cutting
How a Duarte concrete job goes from your call to the pour
Call or send us a message
I still answer the phone myself, so you're usually talking to the person who'll come look at the job. Tell me what you're seeing, whether it's cracks, sinking or water pooling, and we'll pick a time.
I walk the site with you
I measure, ask a lot of questions and watch where the water runs, because the tear-out, the ground under the old slab and the finish you pick are what move the price. You get a written estimate that spells out the base work, not just the surface, and it helps if you're home for it.
We sort out permits first
Before anything goes on the calendar, we find out whether your address falls under the city or the county and what the job needs from that office. We tell you what we found and who's handling each piece, and that step is usually what sets the start date.
We prep, pour and finish
The crew digs out, packs the base, sets forms and steel, then pours and finishes while I'm on site checking the work. When it's done I walk it with you and explain curing, the days the slab needs to gain strength before it takes feet and then tires.
Duarte concrete questions answered
Do I need a permit for a concrete driveway or patio in Duarte?
The city's own permit list doesn't settle it for driveways or patios, so it's worth asking before any work starts. Duarte's Building & Safety Division issues permits to build, alter, repair or demolish a building or structure, and its examples are things like roofs, windows, stucco and enclosed patios. Grading and drainage work need their own separate permits, and any work in the city right-of-way along the street needs a Right of Way Permit pulled by a licensed contractor from the Public Works Division. City Hall's number is (626) 357-7931 if you want to ask directly.
How do I know if my Duarte home is under the City or L.A. County?
Some homes with a Duarte mailing address sit inside L.A. County boundaries and outside the city's jurisdiction, generally 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. If you're anywhere near that corner of town, that's the office to call first.
Does a concrete contractor in Duarte need a California license?
Usually, yes. The California Contractors State License Board requires a license when a job needs a building permit, uses employee labor or costs $1,000 or more in labor and materials, and a home improvement contractor has to hold it before handing you a bid. A bigger job can't be split into smaller pieces to get under that $1,000 line, and Duarte also requires a city business license, paid before work starts, from anyone doing business in the city. We're fully licensed and insured.
How much does a new concrete driveway or patio cost in Duarte?
It comes down to the size of the slab, how much old concrete has to come out, how much the ground under it needs and the finish you choose. A plain broom finish costs less than stamped or colored concrete, and if the budget has to give somewhere, I'd rather cut the finish than the base, because the base decides whether the slab lasts. You get your own number in writing once I've seen the job.
What causes concrete driveways in Duarte to crack and sink?
Usually it's the ground under the slab, because a base that was raked flat instead of dug out and packed settles over time and takes the concrete with it. Control joints cut late or skipped altogether add cracks in places nobody picked. Concrete cracks some no matter what, so the goal is cracks that stay small and land where we put the joints.
Do I need a tree permit in Duarte before pouring a new patio or driveway?
You do if the work means removing a tree on your property, oaks included, or trimming more than a quarter of its foliage, because Duarte requires a city-approved Tree Permit for either one. Normal seasonal trimming of less than a quarter, done to accepted pruning standards, doesn't need one. Roots are a common reason an old slab heaves, so I'll point out any tree that's in play when I look at the job.
Get a free on-site concrete estimate in Duarte
Send the form or call, and we reply within 1 business day to set a time. I come out to your place in Duarte, look at the job and write the estimate myself, free, on site and obligation-free. The work is backed by our satisfaction guarantee.
- Call
- (626) 416-2143
- Location
- Duarte, CA 91010
- Hours
- Mon–Fri: 6 AM–11 PM, Sat–Sun: 7 AM–11 PM
Call about your Duarte driveway or patio
A slab that's sinking now only gets harder to fix, so call (626) 416-2143 or send a message and I'll take a look while it's still one problem.




