Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Fast, Reliable General Contractor Across Ontario
When you hire a General Contractor in Ontario, the real question is rarely “can you do the work.” It’s “what happens when you open the wall and find something the last remodel buried?” In Ontario’s older tracts, that question comes up on nearly every project. We walk every job before we bid it, write allowances for the code upgrades a permit will trigger, and price any surprise in writing before work continues. Call (877) 373-9230 to schedule your free estimate.
Why Garden Grove Contractors Is Ontario’s Preferred General Contractor Company
Ontario homeowners don’t need a contractor who only knows new construction off the 60, and they don’t need one who only knows mid-century remodels off Euclid Avenue. They need a team that works both. Our crews are in Ontario weekly, from the older blocks of 91762 to the newer subdivisions pushing toward 91764. We know the housing stock, the permit counter, and the inspectors.
Led by Noel Cardenas, Garden Grove Contractors operates on one contract and one accountable team across every trade. That matters when a kitchen remodel turns into a structural repair. That matters when a roof replacement reveals framing damage. You don’t get handed off to a sub you never met. You get one contractor who owns the outcome from the countertop to the roofline.
Ontario customers call us because we spec the right material for the project, not the easiest one to install. We source from brands pros trust, and we write the full scope before we swing the first hammer. That’s how we protect your budget and your inspection sign-off.
Styles & brands we work with
- Kitchen remodeling
- Bathroom remodeling
- Home additions & ADU
- Roofing
- Windows & doors
- Driveway & pavers
- Fence
Construction Company in Ontario
A Construction Company in Ontario does more than pull permits and schedule subs. In this city, the work spans two very different worlds: the post-war tract homes and mid-century builds of the older core, and the newer master-planned residential and commercial construction that defines the growth corridors. We handle both. When an Ontario homeowner needs an addition, an ADU, a garage conversion, or a whole-home remodel, the job involves framing, seismic compliance, waterproofing, and finish work across multiple trades. A home addition in Ontario typically runs $45,000 to $130,000 depending on square footage, foundation work, and exterior matching. A garage conversion lands between $30,000 and $80,000.
Structural and Seismic Compliance
Ontario sits in the Inland Empire seismic zone. That’s not a footnote; it’s a design requirement. We bring framing, shear walls, and foundation connections up to current code on every permitted project. When we open a wall and find a load-bearing header that was notched for plumbing back in the 1970s, we fix it before the drywall goes back up. That’s single-source accountability, not a sub’s best guess.
Permit-Ready Scope and Inspections
Any addition or conversion in Ontario triggers plan review and inspections. We pull the permits, schedule the inspections, and don’t close walls until the sign-off clears. If an inspector flags something, we correct it. You’ll never find a buried code violation because we never bury one.
Remodeling Contractor in Ontario
A Remodeling Contractor in Ontario is only as good as what happens during demo. In the older tracts of 91761 and 91762, opening a kitchen or bathroom wall routinely turns up aluminum branch wiring, undersized framing, and failed waterproofing. Those discoveries aren’t rare exceptions. They’re the rule. We plan for them with an inspection-first walk-through and allowances written into the contract. A kitchen remodel in Ontario runs $14,000 to $45,000. A bathroom remodel lands between $9,000 and $28,000. When a permit-triggered upgrade shifts the scope, you’ll see the price in writing before we touch it, not after.
Interior Remodels With Material Accountability
We manage kitchen and bath remodels from the studs out. Cabinets from KraftMaid, countertops from Cambria or Caesarstone, plumbing fixtures from Kohler, Moen, or Delta. We don’t hand you a catalog and disappear. We spec materials based on your budget, your home’s age, and how long you plan to stay. From the countertop to the roofline, one contractor owns every phase.
Exterior and Full-Envelope Work
Ontario’s hot, dry summers and Santa Ana winds punish siding, roofing, and windows. We replace them with products built for inland exposure: James Hardie siding, GAF or CertainTeed roofing, PGT or Therma-Tru windows and doors. A roof replacement in Ontario typically runs $8,000 to $20,000. Window replacement lands between $4,500 and $15,000. We also handle fencing, hardscape, and driveway work, including paver driveways from Belgard or Unilock at $7,000 to $18,000.
Trusted Brands We Service in Ontario
Sourced from the brands pros trust, our Ontario projects draw from more than 50 manufacturer partnerships across six trade categories. We install Therma-Tru entry doors, ViewLux glazing units, Barrette fencing, and Master Halco fence systems, plus roofing from GAF, CertainTeed, and Owens Corning. No waiting on a middleman. No “whatever the supplier has.” You choose from proven products, and we make them fit your home and your budget.
See the difference
Before
After
Before
After
Before
AfterCommon General Contractor Problems We See in Ontario Homes
- Aluminum branch wiring in post-war tracts. Homes built in the 1950s and 1960s across 91762 and 91761 often still carry aluminum branch circuits. When we open walls for a remodel, bringing that wiring to copper is frequently a permit condition, not an optional upgrade.
- Undersized and notched load-bearing framing. Decades of DIY plumbing and electrical work have left their mark on Ontario’s older homes. We regularly find headers, joists, and studs cut or notched far beyond what code allows, which turns a cosmetic remodel into a structural repair.
- Failed waterproofing behind tile and stucco. Ontario’s dry summers mask water damage until it’s extensive. Cracked grout, missing moisture barriers, and poor flashing let seasonal rain get behind finishes and rot the framing underneath.
- Seismic strapping and anchoring gaps. Homes built before the mid-1980s often lack proper sill plate anchoring and lateral bracing. In Ontario’s seismic zone, those deficiencies must be corrected whenever a permit opens the wall, which shifts both scope and cost.
Pricing for General Contractor in Ontario, CA
Here’s what Ontario homeowners should budget for major scopes. These are working ranges, not teaser prices. The numbers move based on square footage, structural condition, material grade, and what the permit review requires.
| Project | Typical Ontario Range |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
| Garage Conversion | $30,000 – $80,000 |
The biggest cost driver in Ontario’s older tracts is what the inspection-first walk-through finds behind the drywall. We build allowances into the contract for the most common code upgrades so that a permit-triggered fix doesn’t blindside you. Every change order gets priced and approved in writing before we continue. Call (877) 373-9230 for a free estimate with line-item detail.
We Also Serve Cities Near Ontario
Our crews cover the surrounding Inland Empire communities, including Montclair, Upland, Chino, and San Antonio Heights. If you’re searching for a General Contractor in Ontario and live in one of those neighboring cities, call us anyway. We likely have a crew near you this week.
Serving Ontario, CA - Our Local Coverage Area
We serve Ontario and nearby communities. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
FAQs About General Contractor in Ontario
The usual culprits are aluminum branch wiring, undersized or notched framing, failed waterproofing, and missing seismic anchoring. In Ontario’s post-war tracts of 91761 and 91762, these issues surface on most remodels. A permit-triggered code upgrade can add thousands to the scope, which is why we write allowances into the contract before demo starts. Call (877) 373-9230 and we’ll walk the house before you commit to a number.
We pause work, document the condition, and write a change order with a firm price. You approve it in writing before we move forward. No surprise invoices at the end, no “we had to deal with it” after the fact. That’s how Noel Cardenas and the team operate on every Ontario job.
Yes, if the work alters plumbing, electrical, structural framing, or load-bearing walls. In Ontario, any remodel that opens those systems triggers plan review and inspections. We pull the permits, schedule the inspections, and don’t close walls until the inspector signs off.
A full kitchen remodel in Ontario typically runs $14,000 to $45,000. A smaller kitchen with cabinet replacement and new countertops can land between $9,000 and $20,000. The final number depends on layout changes, structural repairs, material grade, and what the existing wiring and framing look like once the walls are open.
We walk the finished project with you, compile the punch list, and resolve every item before final sign-off. Then we stay until the third-party inspection clears and the permit is closed. No “we’ll get to it later.” The job isn’t done until the city says it’s done.
Written by Noel Cardenas, Owner at Garden Grove Contractors, serving Ontario since our first Inland Empire project.