ADU Company in Fontana — Plans, Permits & Build, One Fixed Price

We handle the design, the engineering, and the city permit, then build it. One contract, one crew, one accountable point of contact. Free feasibility check on your lot before you commit.

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ADU Company in Fontana, CA

Kitchen remodeling in Fontana means working with homes built between the 1950s and early 2000s, where original layouts were sized for one generation and now strain under multi-generational households. The hot Inland Empire summers also mean ventilation, cooling-friendly materials, and moisture management matter here more than in coastal markets. We’ve helped Fontana homeowners open walls, rebuild kitchens, and add functional space without losing the character of their existing home. If you’re planning a kitchen remodel or an ADU addition, call (877) 265-7231 for a free on-site estimate.

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Why Fontana Homes Are Different

Fontana’s housing stock splits into two distinct worlds, and the split changes how you approach any remodel or addition. The 92335 core, especially south of Foothill Boulevard, holds post-WWII through 1970s stucco single-story homes on wide, deep lots. Many of these properties still carry original framing, galvanized piping, and electrical panels from the era they were built. The newer growth areas in 92336 and 92337, out toward Etiwanda and the north end of town, are dominated by 1990s – 2000s two-story tract homes on smaller rear yards, where space is tighter and a detached ADU is often less feasible than a garage conversion or JADU.

Then there’s the climate. Fontana sits east of the Cajon Pass in the hot, dry Inland Empire. Summer highs routinely exceed 100°F, and Santa Ana wind events push dust and dry heat across the valley floor. Kitchens here hold heat, especially in original single-story homes with poor attic ventilation and no shade canopy. That’s why we pay close attention to exhaust capacity, window glazing, and material choices that won’t warp or fade under sustained heat. For detached ADUs, slab-on-grade foundations need to account for expansive, sandy alluvial soils that shift with moisture content. Fontana’s wide lots in 92335 with rear alley access make detached units very practical; the question is almost always budget and utility routing, not whether a structure will fit.

Our Main Fontana Services

Most Fontana homeowners call us about two things: adding an ADU in the backyard and remodeling a bathroom in an older home. Both projects share a common issue here – working around aging plumbing, undersized electrical service, and city requirements that have changed significantly in recent years. Here’s what each looks like in Fontana.

ADU Builders in Fontana

Fontana has been updating its ADU rules under state law to allow detached units on lots that were previously restricted, and the 92335 core’s deep lots with alley access make detached construction or garage conversion the natural play. We work across eight prefab and modular brands – from Tuff Shed and Boxabl for entry-level budgets to Dvele and Plant Prefab for architect-designed units – so the recommendation fits your lot, timeline, and budget rather than our inventory. Whether it’s a rental unit for income or housing for a family member, our team handles the permitting, site work, and build. See ADU Builders in Fontana for the full breakdown of how this works locally.

ADU Builders in Fontana

Bathroom Remodeling in Fontana

Bathrooms in Fontana’s older 92335 homes are often cramped, original to the 1960s or 70s, and framed around plumbing that’s long overdue for replacement. We regularly open these bathrooms to find cast-iron drain lines, inset tub surrounds trapping moisture, and exhaust fans that vent into the attic instead of outside – a real problem in a climate where summer humidity and heat stress materials. Our remodels rebuild from the studs where needed, upgrade venting to code, and lay out the space around how your household actually uses it. For full details, see Bathroom Remodeling in Fontana.

Bathroom Remodeling in Fontana
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What happens when you call

  1. 1
    A real person answersNo phone trees — you reach a local pro.
  2. 2
    You get an upfront price rangeHonest numbers before anyone is dispatched.
  3. 3
    A background-checked tech heads outLicensed & insured, dispatched right away.
  4. 4
    You approve before work beginsNothing starts until you say go.

Kitchen Remodeling in Fontana

Kitchen remodeling in Fontana is about solving the gap between how 1950s – 80s tract homes were built and how families actually live now. Original kitchens in the 92335 core are small, closed off from living space, and built around a single cook’s workflow. Multi-generational households in Fontana need multiple prep zones, storage for bulk groceries, and layouts that let two or three people cook without collision. The heat matters too: an under-vented kitchen in a Fontana summer becomes unusable by 5 p.m. unless you address airflow during the remodel. We rebuild kitchens with these realities in mind, and because we also handle ADU construction, your kitchen remodel can be sequenced alongside a backyard unit under one contractor. See our Kitchen Remodeling hub for the broader scope of what we do.

Cabinet and Countertop Replacement

Signs you need it

Cabinet doors are warped or delaminating from years of Fontana heat exposure, or the layout wastes so much space that you’re using a second room for storage.

What it costs in Fontana

Budget $7,000 – $15,000 for stock or semi-custom cabinets with quartz or butcher block countertops in a typical Fontana kitchen, depending on count and material grade.

How we do it

We remove the old boxes, inspect framing for heat or moisture damage, then set new cabinets level on shims and template countertops for a flat, gap-free fit.

Kitchen Layout Reconfiguration

Signs you need it

Your kitchen is closed off from the living area, or the work triangle places the sink, range, and refrigerator in a line so two cooks can’t work at once.

What it costs in Fontana

Layout changes run $15,000 – $35,000 or more in Fontana when walls come out or plumbing and electrical lines relocate through older framing.

How we do it

We confirm which walls are load-bearing, pull permits for any structural change, then reframe openings and reroute rough plumbing and wiring before finish work begins.

Full Kitchen Gut and Rebuild

Signs you need it

Multiple systems are failing at once – worn cabinets, a floor that’s spongy or peeling, cast-iron drain lines, and an electrical panel that can’t handle modern appliances.

What it costs in Fontana

A complete kitchen rebuild in Fontana typically runs $25,000 – $50,000+ depending on square footage, appliance selection, and whether framing or foundation repair is needed.

How we do it

We strip to the studs, update rough electrical and plumbing to current code, insulate against Fontana heat, then install drywall, flooring, cabinetry, counters, and fixtures.

What Kitchen Remodeling Costs in Fontana

Item Typical range in Fontana
Cabinet and countertop replacement $7,000 – $15,000
Layout reconfiguration with wall removal $15,000 – $35,000+
Full kitchen gut and rebuild $25,000 – $50,000+

The biggest price swings in Fontana come from electrical panel upgrades (many older 92335 homes still run 100-amp service), rerouting cast-iron drain lines, and the rising cost of high-efficiency ventilation that actually works in 100°F summers. We give line-item written quotes before work starts, and our pricing is fixed – no change orders unless you change the scope.

Can you remodel a Fontana kitchen without moving the plumbing?

Yes. Keeping the sink and gas line in place saves $3,000 – $8,000 in rough plumbing and electrical work, and it’s the right call in many 1950s – 70s Fontana homes where the existing location is already efficient. Call (877) 265-7231 for a free kitchen estimate.

How long does a kitchen remodel take in Fontana?

Most Fontana kitchen remodels take 4 – 10 weeks from demo to final inspection, with cabinet and counter replacements on the shorter end and full gut rebuilds requiring structural inspection at the longer end. We’ll give you a week-by-week schedule at contract signing. Call (877) 265-7231 to schedule your free estimate.

Brands We Service in Fontana

We work with Plant Prefab, Tuff Shed, and James Hardie systems regularly in Fontana, and stock the parts and finishes those builds require locally rather than running back and forth to Orange County. That keeps replacement panels and trims moving quickly for Fontana clients. See our brands for the full spectrum.

Pricing for ADU Company in Fontana, CA

Service Typical range in Fontana
Cabinet and countertop replacement $7,000 – $15,000
Kitchen layout reconfiguration $15,000 – $35,000+
Full kitchen gut and rebuild $25,000 – $50,000+
Bathroom remodel (small, 5×8 or under) $8,000 – $15,000
Bathroom remodel (medium, with tub/shower replacement) $15,000 – $25,000
Bathroom remodel (large, layout change or wet-area move) $25,000 – $45,000+
ADU garage conversion $80,000 – $120,000
Prefab ADU (entry to mid-range) $100,000 – $250,000
Custom detached ADU (site-built) $250,000 – $500,000+

The biggest cost drivers in Fontana are utility trenching across the deep lots in 92335, electrical panel upgrades on older homes, and structural reinforcements required for garage conversions on post-WWII slabs. We quote fixed, line-item pricing up front – no change orders unless you ask for a change.

Neighborhoods We Serve in Fontana

We work throughout Fontana and the surrounding Inland Empire communities, from the older stucco homes south of Foothill and the deep lots off Juniper and Mango in 92335, up through the newer two-story tracts in the north end of 92336 and 92337. Our crews are in the city weekly, and we typically schedule estimates within a few business days.

  • Southridge – 92337
  • Etiwanda-adjacent north Fontana – 92336
  • Downtown core – 92335
  • West Fontana near Kaiser – 92335
  • Summit Heights area – 92336

Service Area – Cities Near Fontana

Beyond Fontana, we also serve Bloomington, CA, Rialto, CA, Glen Avon, CA, and Pedley, CA. The same multi-brand ADU approach and remodel scope apply throughout the area, so if you’re in a nearby city with a similar lot type or housing style, the estimate process is the same. Call (877) 265-7231 to confirm coverage in your neighborhood.

Serving Fontana, CA — Our Local Coverage Area

We’re based in the Fontana 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 Fontana

Can you do a kitchen remodel and an ADU at the same time in Fontana?

Yes, and it’s often more cost-efficient than running them separately. Single mobilization, one dumpster, one superintendent, and we can sequence noisy demo when it makes sense for your household. Both scopes fall under our single contractor relationship. Call (877) 265-7231 for a free estimate.

Ready to get started? Free estimates · Free in-home estimates response in Fontana
Call (877) 265-7231

What happens when you call

  1. 1
    A real person answersNo phone trees — talk to a local adu pro.
  2. 2
    You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
  3. 3
    We come out and measureLicensed & insured, at a time that suits you — the visit and the quote are both free.
  4. 4
    You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.

What Fontana Customers Say

★★★★★ 5.0 from 4+ reviews

"Every invoice was tied to a completed milestone, so I always knew what I was paying for."

— Kevin Bennett

"Knew the local setback and parking rules cold, which saved us from designing something that would never have been approved."

— Alicia Ingram

"He gave us a realistic rental number for the finished unit rather than the optimistic one, and it's renting for about what he said."

— Danika Prince

How It Works in Fontana

Getting your adu handled is simple and fast.

1

Call or Request a Free Estimate

Tell us about your adu needs and we provide an upfront, transparent quote — no obligation, no hidden fees.

2

Licensed Technician Dispatched

A background-checked, certified technician arrives in Fontana — typically within 30–60 minutes, with parts stocked on the truck.

3

Problem Solved, Guaranteed

We complete the job to your full satisfaction, backed by our warranty and 100% satisfaction guarantee.

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