ADU Company in San Bernardino — 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 San Bernardino, CA

Kitchen remodeling in San Bernardino means working with homes built between the 1940s and 1970s, where outdated electrical panels, galvanized plumbing, and decades of accumulated wear shape every project. Costa Mesa ADU Builders handles the full scope: we build ADUs, we remodel kitchens and bathrooms, and we manage everything from structural shell to finished interior under one contract. If you’re weighing an ADU against a kitchen update or planning both in the same phase, call (833) 589-8273 to talk through what your specific lot and house can support.

Call (833) 589-8273

Why San Bernardino Homes Are Different

San Bernardino’s housing stock tells a specific story. Most single-family homes went up between the 1940s and 1970s, which means original galvanized plumbing, undersized electrical panels, and minimal insulation are the norm rather than the exception. Any ADU or kitchen project on these properties requires upgrading systems to current code before finish work begins. In the older neighborhoods around downtown and the east side, many garages were built with shallow footings and unpermitted additions, so converting one to an ADU often means foundation work and verification of existing structures before plans get approved.

The climate adds another layer. Summers regularly cross 100°F, and tenants in a new ADU will feel every degree if insulation and cooling are treated as afterthoughts. That’s why we spec robust insulation, efficient HVAC, and shade-conscious window placement on every San Bernardino project. Santa Ana winds and wildfire smoke also push us toward fire-resistant materials like James Hardie fiber-cement siding, which holds up better than vinyl when it matters. Large lots in working-class neighborhoods give homeowners genuine options: detached ADUs, garage conversions, or interior remodels that make the primary house rentable while a new unit generates income. The land values and relatively permissive ADU ordinances make San Bernardino one of the better cities in the Inland Empire for this kind of investment, but the pre-1970s housing stock means asbestos, lead paint, and aging infrastructure have to be handled correctly in nearly every project we touch.

Our Main San Bernardino Services

San Bernardino homeowners call us most often about two things: building an ADU on an underused lot or garage footprint, and remodeling a bathroom in a house that hasn’t seen updates in decades. Both start with a free estimate and a realistic conversation about what the property can support.

ADU Builders in San Bernardino

We build both prefab and site-built ADUs across San Bernardino, which means your recommendation is based on your lot, your timeline, and your budget, not on what a contractor happens to stock. Garage conversions are especially common here, but many of those older garages need foundation upgrades before a single wall goes up. We handle that discovery, the permits, the utility connections, and the finished interior without handing you off to another contractor. ADU Builders in San Bernardino covers our full process, brand options, and what to expect from the city’s permitting timeline.

ADU Builders in San Bernardino

Bathroom Remodeling in San Bernardino

Original bathrooms in 1940s-to-1970s homes often hide galvanized supply lines, failing shower pans, and layouts that don’t work for modern households. We open those spaces up, address the plumbing and venting properly, and finish with materials that handle San Bernardino’s hard water and heat. Bathroom Remodeling in San Bernardino walks through our process, common scope decisions, and what local homeowners should budget for a full update versus a cosmetic refresh.

Bathroom Remodeling in San Bernardino
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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 San Bernardino

A kitchen remodel in San Bernardino usually starts with walls that hide galvanized pipe, wiring that predates microwave circuits, and a layout designed for a family that cooked differently fifty years ago. The hot inland summers make ventilation and cooling design critical, especially when a gas range is part of the plan. We approach every project as a full-system update first, finish second, so the kitchen you get actually functions for the next two decades, not just the next two years. If you’re also weighing an ADU build in the same project phase, we can sequence both scopes so you aren’t living through two separate periods of disruption. Our full kitchen process and material options are covered on our Kitchen Remodeling page.

Full Kitchen Renovation

Signs you need it

Your kitchen has original cabinets, a layout that cuts the room off from the rest of the house, or plumbing and electrical that can’t support modern appliances without tripping breakers.

What it costs in San Bernardino

Full kitchen renovations in San Bernardino typically run from $35,000 to $70,000 depending on square footage, cabinet grade, and how much structural work the older home requires.

How we do it

We start by opening the walls with an eye toward what the 1940s-to-1970s construction left behind, then replace or bring up to code the electrical, plumbing, and ventilation before new cabinets, counters, and finishes go in.

Cabinet Refacing and Countertop Replacement

Signs you need it

The cabinet frames are solid but the doors and drawer faces are worn, or the counters are cracked, stained, or dated while the bones of the kitchen still work.

What it costs in San Bernardino

Cabinet refacing and countertop replacement in San Bernardino typically falls between $12,000 and $25,000 with mid-range materials.

How we do it

We measure and order new door and drawer fronts in your chosen finish, replace hardware, and set new counters after checking that the existing cabinet boxes are square and structurally sound.

What Kitchen Remodeling Costs in San Bernardino

Item Typical range in San Bernardino
Full kitchen renovation $35,000 – $70,000
Cabinet refacing and countertops $12,000 – $25,000
Appliance package and installation $6,000 – $18,000

How long does a kitchen remodel take in San Bernardino?

A full kitchen remodel in San Bernardino takes 6 to 10 weeks on most older homes; refacing and countertop work typically takes 2 to 4 weeks. Structural or electrical surprises add time, which is why we open walls before finalizing the schedule.

Will my kitchen remodel price change once work starts?

Our written line-item quotes are fixed once we’ve opened the walls and confirmed what’s behind them. The only changes come from your own scope additions, and we put every change order in writing before proceeding. Call (833) 589-8273 for an exact quote.

Brands We Service in San Bernardino

We work across the major prefab manufacturers, including Boxabl, Plant Prefab, and Tuff Shed, so the ADU recommendation you get fits your lot and budget rather than a vendor we’re tied to. For exterior finishes, we install James Hardie fiber-cement siding, which resists fire, moisture, and impact far longer than vinyl in San Bernardino’s heat and wind. See our brands for the full range.

Pricing for ADU Company in San Bernardino, CA

Service Typical range in San Bernardino
Full kitchen renovation $35,000 – $70,000
Cabinet refacing and countertops $12,000 – $25,000
Appliance package and installation $6,000 – $18,000
Detached ADU (prefab) $180,000 – $320,000
Detached ADU (site-built) $220,000 – $380,000
Garage conversion to ADU $120,000 – $250,000
Bathroom remodel (full) $15,000 – $35,000
Bathroom remodel (cosmetic) $8,000 – $18,000

San Bernardino pricing shifts most when we open walls on pre-1970s homes and find galvanized plumbing, undersized panels, or foundation issues that must be corrected to pass inspection. We give you a fixed, written line-item quote before work starts and don’t change the number unless you change the scope.

Neighborhoods We Serve in San Bernardino

We work across San Bernardino’s residential neighborhoods, including the older grid around downtown, the east side, and the larger-lot areas where detached ADUs make the most financial sense. Response time for estimates in the city is typically 24 to 48 hours Monday through Saturday.

  • Downtown San Bernardino
  • East San Bernardino
  • North Park area
  • Verdemont
  • Wildwood Park district

Service Area – Cities Near San Bernardino

We also serve the surrounding Inland Empire communities, including Muscoy, CA, Highland, CA, Loma Linda, CA, and Rialto, CA. If your property sits near the city line and you’re not sure which service area applies, call and we’ll confirm immediately.

Serving San Bernardino, CA — Our Local Coverage Area

We’re based in the San Bernardino 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 San Bernardino

Ready to get started? Free estimates · Free on-site estimates response in San Bernardino
Call (833) 589-8273

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 San Bernardino Customers Say

★★★★★ 5.0 from 4+ reviews

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

— Imani Ellison

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

— Gilbert Vargas

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

— Ryan Padgett

How It Works in San Bernardino

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 San Bernardino — 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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