ADU Company in Corona, CA
Holloway ADU Builders handles kitchen remodeling in Corona with a focus on how older 1950s and 1960s ranch homes near Grand Boulevard and Circle City actually behave when you open up walls. Corona’s summer heat pushes past 100°F in the Santa Ana River corridor, so ventilation, appliance placement, and cooling load planning matter more here than in coastal cities. We’re also the ADU contractor Corona homeowners call when they want one team managing both the accessory dwelling unit and the finished kitchen inside it. Call (855) 617-6356 to schedule a free estimate.
Why Corona Homes Are Different
Corona sits at the western gateway of Riverside County, where state ADU law meets a local permitting process and hillside geography that changes what’s actually buildable on any given lot. The city stretches from a mid-century core around Grand Boulevard and Circle City out to the 1990s and 2000s tracts in Dos Lagos, Eagle Glen, and Temescal Valley. The older 92879 and 92882 homes are mostly ranch-style houses from the 1950s and 1960s on modest lots, and they often have detached garages sitting behind narrow side yards. That limits equipment access and concrete pumping when you’re converting a garage into an ADU or adding a kitchen. The newer large-lot homes in 92881 and 92883 look easier at first glance, but many sit on foothill edges with slope and drainage issues that trigger grading permits and retaining walls. On top of city code, the newer tracts often have HOAs whose CC&Rs add another layer of approval. Corona’s dry Santa Ana winds also make fire-resistant exterior materials and defensible space a real design consideration on the hillside edges. Every job here is plot-by-plot, not zip-code-by-zip-code.
Our Main Corona Services
Most Corona homeowners reach out to us about two things: building an ADU on their property, or remodeling a bathroom inside the main house or the new unit. Here’s what each involves in this city.
ADU Builders in Corona
We build accessory dwelling units across Corona’s full range of lot types, from downtown-core garage conversions to hillside detached units in 92881 and 92883. Corona’s permitting means slope, drainage, and setbacks get scrutinized differently depending on whether you’re near Circle City or up against the Corona Hills. We’ll match you to the right ADU approach, prefab, modular, or site-built, based on your lot and goals. Learn more on our dedicated page for ADU Builders in Corona.
Bathroom Remodeling in Corona
Bathroom work in Corona’s older ranch homes often means working around galvanized plumbing, outdated venting, and small footprints that need smart layout changes rather than square-footage additions. In the newer tracts, we see more cosmetic updates and ADU bathroom build-outs where the unit needs its own plumbing run from the main line. One team handles it from rough-in to tile and fixtures. Details are on our Bathroom Remodeling in Corona page.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Kitchen Remodeling in Corona
Kitchen remodeling in Corona usually means one of two jobs: gutting a 1950s or 1960s ranch kitchen near Grand Boulevard that’s never been touched, or finishing the kitchen inside a newly built ADU so it’s rentable or livable for family. The older homes have cast-iron drain lines, undersized electrical panels, and floor plans that trap heat, so a Corona kitchen remodel is as much about mechanical upgrades and airflow as it is about cabinets and countertops. For a broader look at how we approach kitchens everywhere we work, see our Kitchen Remodeling hub page.
Full Kitchen Gut and Rebuild
Signs you need it
Your Corona kitchen has original 1950s or 1960s cabinets, a single 20-amp counter circuit, and a layout that can’t handle more than one person moving through it.
What it costs in Corona
Full kitchen gut and rebuild projects in Corona typically run from $35,000 to $70,000 depending on layout changes, panel upgrades, and finish level.
How we do it
We demo to studs, upgrade the electrical and plumbing runs, reframe the layout, install new ventilation sized for Corona’s summer heat, and finish with cabinets, countertops, and appliances.
ADU Kitchen Build-Out
Signs you need it
Your detached ADU is framed and weatherproofed but the interior kitchen has no cabinets, plumbing connections, or appliances, and you need it rent-ready.
What it costs in Corona
ADU kitchen build-outs in Corona typically range from $18,000 to $35,000 for a compact, code-compliant kitchen with new plumbing and electrical runs.
How we do it
We run dedicated plumbing and electrical from the main service, install compact cabinets and countertops sized for the unit, add a range or cooktop with proper ventilation, and finish with fixtures and backsplash.
What Kitchen Remodeling Costs in Corona
| Item | Typical range in Corona |
|---|---|
| Full kitchen gut and rebuild | $35,000 – $70,000 |
| ADU kitchen build-out | $18,000 – $35,000 |
| Panel upgrade (older homes) | $2,500 – $5,500 |
Corona’s older core homes push prices toward the upper end when the job requires a panel upgrade, cast-iron drain replacement, or moving a load-bearing wall. Newer tract homes tend to land lower on finish work. Both get written line-item quotes before work starts, so there are no surprises.
How long does a kitchen remodel take in Corona?
A full kitchen remodel in Corona usually takes 4 to 8 weeks. Permitting through the city adds time, and older homes with hidden plumbing or electrical problems can stretch the schedule. An ADU kitchen build-out is faster, often 2 to 3 weeks once the space is ready. Call (855) 617-6356 to get a realistic timeline for your specific kitchen.
Will the price change once work starts?
No, not without your written approval. We provide a fixed-price, line-item quote after we inspect the kitchen and the home’s mechanical systems. If your Corona home’s wiring or plumbing reveals a code issue after demo, we flag it immediately and price the change separately before any new work proceeds. Call (855) 617-6356 for a kitchen remodel estimate that accounts for your home’s actual condition.
Brands We Service in Corona
We work with leading prefab and modular ADU brands including Cover, Dvele, and Mighty Buildings, plus Boxabl for compact accessory units. Brand-agnostic ADU guidance means we’re not locked into one manufacturer, so your Corona lot and budget decide the approach. We’re also equipped to handle our brands across the full construction spectrum, from foundation to finished interior.
Pricing for ADU Company in Corona, CA
| Service | Typical range in Corona |
|---|---|
| Full kitchen gut and rebuild | $35,000 – $70,000 |
| ADU kitchen build-out | $18,000 – $35,000 |
| Electrical panel upgrade | $2,500 – $5,500 |
| Bathroom remodel (older home) | $15,000 – $30,000 |
| ADU bathroom build-out | $10,000 – $20,000 |
| Detached ADU site work (grading/retaining) | $8,000 – $25,000 |
| Garage-to-ADU conversion | $80,000 – $150,000 |
| Detached ADU (site-built) | $150,000 – $300,000 |
| Prefab or modular ADU (installed) | $120,000 – $250,000 |
| Tuff Shed conversion to ADU | $60,000 – $120,000 |
Prices in Corona climb when a hillside lot in 92881 or 92883 needs retaining walls, grading, or slope drainage engineering before the ADU foundation can go in. Older downtown-core lots near Circle City can also push costs up when panel upgrades and narrow side-yard access slow the job down. Every quote we give is fixed-price and line-itemed, with no change orders unless you approve them first.
Neighborhoods We Serve in Corona
We work across the full spread of Corona lot types, from the mid-century core to the foothill tracts. Most projects fall within a 15 to 20 minute drive of our Home Gardens base, so site visits and estimates are easy to schedule.
- Downtown Corona (92879)
- Circle City (92879, 92882)
- Dos Lagos / Eagle Glen (92883)
- Temescal Valley (92881, 92883)
- Corona Hills (92881)
Service Area – Cities Near Corona
Holloway ADU Builders is based in Home Gardens, CA and serves the surrounding Riverside County communities. We take ADU and remodeling projects in El Cerrito Corona, CA, Eastvale, CA, and Norco, CA, along with the rest of the Corona area. If you’re within a short drive of our base, we can schedule a lot walk and estimate without much delay.
Serving Corona, CA — Our Local Coverage Area
We’re based in the Corona area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs About ADU Company in Corona
Yes. We handle the city of Corona permit process for ADUs, kitchen remodels, and bathroom remodels. That includes submitting plans, coordinating with the building department, scheduling inspections, and closing out the permit. If your project is in an HOA-governed tract like Dos Lagos or Eagle Glen, we’ll also flag any CC&R reviews you need to handle with your association. Call (855) 617-6356 and we’ll tell you what your specific lot requires.
We can usually get a Corona kitchen remodel scheduled within 2 to 4 weeks of the signed contract, depending on permit turnaround and material lead times. Older homes that need panel or plumbing upgrades may need an extra inspection step before demo starts. The best way to lock a start date is to schedule your free estimate now. Call (855) 617-6356.
Yes, that’s the core of how we work. One team handles the ADU structure and the kitchen and bathroom finishing inside it. You won’t need a second contractor to make the unit move-in ready, and the plumbing, electrical, and cabinet work all goes through the same schedule and the same line-item budget. Call (855) 617-6356 for a free estimate on the full scope.
What happens when you call
- 1A real person answersNo phone trees — talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you — the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Corona Customers Say
"Unit came out great and the tenant is happy. The timeline ran long, largely because of how slow the city was on plan check, though a couple of the delays were scheduling on their end."
— Heather Reed"Every invoice was tied to a completed milestone, so I always knew what I was paying for."
— Justin Kim"Garage conversion to a one bedroom unit. He handled the plans, the city submittal, and every round of corrections. Took six months from first meeting to final inspection and he never once made the permit process my problem."
— Rachel Brooks