ADU Company in Fontana — Design, Permits and Build Under One Contract

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 usually means working inside a 1950s to 1970s stucco tract home where the original layout still has a closed-off galley kitchen and wiring that predates today’s appliance loads. Bungalow ADU Builders handles the full remodel – demo, rough-in, cabinets, counters, and finish work – so the same crew that builds your ADU shell can also make the main house kitchen work for how your family actually lives. We also build ADUs and remodel bathrooms across Fontana’s 92335 and 92336 ZIP codes, with a focus on the older South Fontana tracts where deep lots and alley access make rear additions and casitas practical. Call (866) 730-4828 for a free estimate on any of it.

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Why Fontana Homes Are Different

Fontana’s housing stock splits into two distinct worlds. South of the 10, you’re looking at post-WWII Kaiser Steel-era tract homes – mostly single-story stucco boxes on 7,000 to 10,000 square foot lots, many with detached garages and alley access behind the house. These lots have the kind of deep backyard space that would be unbuildable in Rancho Cucamonga’s newer, tighter subdivisions, which is why ADUs and rear casitas make so much sense here. North Fontana tells a different story: 1980s through 2000s subdivisions with smaller yards, HOAs in some pockets, and newer electrical panels that rarely need upgrading.

The climate shapes every job we do. Fontana summers routinely push past 100°F, and Santa Ana winds hit in the fall. Any new ADU or remodeled kitchen needs serious insulation, sun-shaded glazing on west-facing walls, and cooling capacity that won’t leave the space unusable from June through September. Title 24 compliance here isn’t a formality – it’s the difference between a unit that stays livable and one that becomes an oven by 2 p.m. Older South Fontana homes often need electrical panel upgrades before any significant remodel or ADU work can pass inspection, and many have no existing rear utility runs, which adds trenching and conduit work to the budget.

One more Fontana-specific reality: unpermitted garage conversions are common in the older tracts. Before a new ADU permit gets issued, the city often requires those existing conversions to be legalized or brought up to current code. That’s a cost and timeline factor we flag early in the conversation, because it catches a lot of homeowners off guard.

Our Main Fontana Services

Two services dominate the calls we get from Fontana homeowners: ADU construction on those generous South Fontana lots, and bathroom remodeling that brings older homes up to modern standards. Here’s what each involves locally.

ADU Builders in Fontana

Fontana’s ADU market is driven by the post-WWII tract homes on large lots straddling the 92335/92336 line, where many multi-generational families add units for aging parents or adult children. Those deep backyards and alley-access parcels make rear-detached ADUs and garage conversions straightforward, though older electrical panels and missing rear utility runs are the usual upgrade bottlenecks. We work with a defined roster of prefab and modular brands – Abodu, Dvele, Mighty Buildings, and others – so you’re comparing systems, not getting funneled into one product. ADU Builders in Fontana covers the full scope, from permit drawings to the finished unit.

ADU Builders in Fontana

Bathroom Remodeling in Fontana

Bathroom remodels in Fontana’s older homes usually mean opening up 5-foot by 8-foot baths, replacing cast-iron drain lines that have been in the ground since the Eisenhower administration, and reworking layouts that were never designed for two adults getting ready at once. For homeowners adding an ADU, we also handle the ADU bath as part of the same project, so the interior finishes don’t hand off to a separate contractor. Bathroom Remodeling in Fontana walks through costs, timelines, and what to expect from the demo-to-finish process.

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 typically costs between $35,000 and $85,000 depending on the scope, and most jobs in the older South Fontana tracts include some electrical work because the original panels can’t handle modern appliance loads. The biggest local variable is whether the remodel stays within the existing footprint or opens into a dining room or rear addition – Fontana’s post-war galley kitchens were built small, and most homeowners want the wall gone. We handle everything from demo to finished backsplash, with in-house crews doing the work rather than farming it out. See our Kitchen Remodeling service page for the full scope.

Whole-Kitchen Gut Remodel

Signs you need it

Your kitchen still has its original 1960s layout, the cabinets are particleboard that’s swelling at the base, and you can’t open the refrigerator and dishwasher at the same time.

What it costs in Fontana

A full gut remodel in Fontana runs $45,000 to $85,000, with the higher end reflecting structural wall removal, custom cabinetry, and upgraded appliances.

How we do it

We demo to the studs, upgrade the electrical and plumbing rough-in, install new drywall and flooring, hang cabinets, set countertops, and trim out with backsplash and fixtures – one crew from start to finish.

Cabinet Replacement and Countertop Update

Signs you need it

The cabinet boxes are structurally sound but the doors are dated or delaminating, and the laminate countertops have burns, chips, or water damage at the sink.

What it costs in Fontana

Cabinet refacing or replacement with new countertops in Fontana runs $15,000 to $35,000 depending on cabinet choice and countertop material.

How we do it

We remove the old doors and counters, install new cabinet fronts or full boxes, set the new countertop, and reconnect the sink and fixtures – typically a one-to-two-week job.

What Kitchen Remodeling Costs in Fontana

Item Typical range in Fontana
Full kitchen gut remodel $45,000 – $85,000
Cabinet and countertop update $15,000 – $35,000
Electrical panel upgrade (common in South Fontana) $3,000 – $6,000

Does a kitchen remodel in Fontana require a permit?

Yes. Any remodel that moves plumbing, alters electrical, or removes walls requires a city permit in Fontana. We pull all permits, and if your project triggers an electrical panel upgrade – very common in South Fontana’s older homes – we handle that as part of the same permit set. Call (866) 730-4828 for specifics on your scope.

How long does a kitchen remodel take in Fontana?

Plan for 6 to 12 weeks depending on scope. A cabinet and countertop update runs 1 to 2 weeks; a full gut remodel with wall removal and panel upgrade runs 8 to 12 weeks. Fontana’s plan check times have been running 2 to 4 weeks on typical remodels. Call (866) 730-4828 for a timeline based on your exact project.

Brands We Service in Fontana

We work with the brands you’ve likely already researched – Abodu, Cover, Dvele, and more – and pair them with James Hardie fiber-cement exteriors for durability through Fontana’s hot, dry summers. Parts for cabinet hardware, fixtures, and finish materials are sourced through local Inland Empire suppliers, which keeps lead times short. Learn more on our brands page.

Pricing for ADU Company in Fontana, CA

Service Typical range in Fontana
Full kitchen gut remodel $45,000 – $85,000
Cabinet and countertop update $15,000 – $35,000
Electrical panel upgrade $3,000 – $6,000

In Fontana, prices push toward the upper end when the job involves an unpermitted garage conversion that needs legalization, a missing rear utility run that requires trenching, or an electrical panel that’s original to a 1950s home. The lower end reflects work on newer North Fontana homes where the infrastructure is already in place. We price everything upfront with a written line-item quote, and once you approve the scope, the price doesn’t change unless you change it.

Neighborhoods We Serve in Fontana

We work across Fontana’s four ZIP codes – 92334, 92335, 92336, and 92337 – from the older South Fontana tracts with alley access and detached garages to the newer subdivisions north of the 210. Representative areas include:

  • South Fontana (Kaiser Steel-era tracts)
  • Downtown Fontana
  • North Fontana
  • West End
  • Sierra Lakes

Response time for estimates anywhere in Fontana is typically within 2 to 3 business days.

Service Area – Cities Near Fontana

Bungalow ADU Builders has served Fontana since 2014, and our service area runs through the surrounding Inland Empire communities. We work in Bloomington, CA for homeowners on similar post-war lots, Rialto, CA where the housing stock mirrors Fontana’s older tracts, Glen Avon, CA to the south, and Pedley, CA for properties along the Santa Ana River corridor. If you’re in Fontana or any of these nearby cities, the same crew and the same upfront pricing apply.

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

Ready to get started? Free estimates · Written quotes before work starts response in Fontana
Call (866) 730-4828

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

★★★★★ 4.8 from 4+ reviews

"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."

— Emily Yang

"Sound insulation between the unit and the main house is better than I expected. You genuinely cannot hear the tenant."

— Alicia Ingram

"The kitchenette layout he suggested made better use of the space than the one on our original sketch."

— Kelly Schaefer

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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