ADU Company in Los Serranos — 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 Los Serranos, CA

Kitchen remodeling in Los Serranos means working with 1960s-to-1980s single-story tract and ranch homes where galley layouts, load-bearing walls, and aging electrical are the norm – and where a well-planned remodel does more than update cabinets. It resets how a kitchen functions in a house that was framed before open-concept was a standard. We plan every Los Serranos kitchen project around the indoor-outdoor movement these lots can support, the Santa Ana heat that pushes HVAC choices, and the reality that many of these remodels happen alongside an ADU so the whole property works harder. Call (866) 538-0916 to talk through what your kitchen could become.

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Why Los Serranos Homes Are Different

Los Serranos is unincorporated, which means A D U and remodeling permits route through San Bernardino County rather than a city building department. That single fact changes timing, plan review, and what gets flagged. It also means a project can sit a few hundred feet from a Chino Hills parcel where the rules are completely different, so we check jurisdiction before we draw anything. The housing stock itself is predominantly single-story ranch and tract builds from the sixties through the eighties on oversized lots with block walls, detached garages, and rear alleys – geometry that rewards rear-yard ADUs and garage conversions over side-yard builds, and kitchens that open to back patios rather than side courtyards.

The canyon edge is the other variable. Lots backing onto Carbon Canyon and Chino Hills open space fall under wildfire-interface review, so exterior detailing, venting, and defensible space all become part of a kitchen or ADU scope, not an afterthought. And summers here run hot and dry, with Santa Ana winds pushing temperatures well past what undersized HVAC can handle. When we remodel a kitchen in Los Serranos, we size for that heat, not for a mild coastal afternoon, and when we build an ADU we treat the roof, the vents, and the siding as fire-defense decisions first.

Our Main Los Serranos Services

Two services dominate the calls we get from Los Serranos homeowners, and they usually connect: the ADU decision, and the bathroom work that makes a new or existing unit livable.

ADU Builders in Los Serranos

Most Los Serranos lots were laid out when a detached garage and a wide backyard were standard, so detached ADUs and garage conversions fit without the awkward side-yard squeeze we see in newer cities. The county review process is the part that trips people up, especially near the city boundary where jurisdiction flips street by street. We match each project to the right build method – from high-design prefab to a Tuff Shed conversion to full site-built – and we do the kitchen and bath inside that unit ourselves so you are not coordinating a second contractor. ADU Builders in Los Serranos covers the full scope, from parcel checks to the final inspection.

ADU Builders in Los Serranos

Bathroom Remodeling in Los Serranos

Bathrooms in this housing era are compact, often original, and usually framed with the plumbing exactly where it has been since the sixties. The remodel question is usually whether to work within that footprint or borrow space, and on Los Serranos lots the answer often involves capturing a bit of the oversized garage or converting a hall closet. Whether the bath is inside a new ADU or part of the main house, we handle the full interior scope in-house so the tile, the waterproofing, and the fixtures all come from one crew. Bathroom Remodeling in Los Serranos walks through the details and what a project like that looks like here.

Bathroom Remodeling in Los Serranos
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  1. 1
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  2. 2
    You get an upfront price rangeHonest numbers before anyone is dispatched.
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    You approve before work beginsNothing starts until you say go.

Kitchen Remodeling in Los Serranos

Kitchen remodeling in Los Serranos is rarely just about newer cabinets. Most of these homes were built between the 1960s and 1980s, which means enclosed galley or L-shaped kitchens, load-bearing walls where today’s buyers want an island, and electrical panels that were never sized for a modern appliance lineup. Add the inland heat – summers here routinely push kitchen exhaust and refrigeration hard – and a remodel that ignores ventilation or cooling loads ends up uncomfortable no matter how good it looks. We plan each Los Serranos kitchen around the house era, the lot’s rear-yard potential, and the heat, then bring the full scope in-house: layout, structural work, cabinets, counters, plumbing, electrical, and the finish details. Our Kitchen Remodeling service covers everything from a cosmetic refresh to a full gut and reconfiguration.

Galley Kitchen Opening

Signs you need it

You are cooking against a wall, the kitchen cuts the house in half, or the dining area feels disconnected from everything else.

What it costs in Los Serranos

A full galley-to-open-concept remodel in Los Serranos with structural work and new infrastructure typically runs $45,000 to $75,000.

How we do it

We verify county load requirements for the wall, install the beam according to San Bernardino County review, reroute electrical and plumbing, then build out the new layout with cabinetry, counters, and a properly sized vent hood.

Full Kitchen Gut and Rebuild

Signs you need it

The cabinets are delaminating, the layout fights you daily, and you are planning to stay in the house for the next ten years or more.

What it costs in Los Serranos

Expect $60,000 to $90,000 in Los Serranos for a complete down-to-studs rebuild with new electrical, plumbing, cabinetry, counters, and appliances.

How we do it

After the county approves the plan set, we demo to the studs, update the panel and circuits, move or replace plumbing, reconstruct walls and flooring, then install the full cabinet, counter, and appliance package with a Los Serranos-appropriate HVAC check.

What Kitchen Remodeling Costs in Los Serranos

Item Typical range in Los Serranos
Cabinet refacing and hardware $8,000 – $15,000
Full kitchen gut and rebuild $60,000 – $90,000
Galley-to-open-concept with structural work $45,000 – $75,000

What pushes a Los Serranos kitchen higher than the base range is usually the structural wall removal, a panel upgrade, or discovering that the original plumbing runs through a slab that has shifted. We give written line-item quotes before work starts, so the number we agree on is the number you pay.

How long does a kitchen remodel take in Los Serranos?

Cosmetic work like refacing runs two to three weeks. A full gut and rebuild in Los Serranos, especially with a county-reviewed structural change, runs eight to twelve weeks.

Will the price change once work starts?

No, not from us. The only changes come from hidden conditions behind walls or under the slab, and we document those before touching anything. Call (866) 538-0916 for a fixed, written quote.

Brands We Service in Los Serranos

We work across the ADU and exterior brand spectrum so Los Serranos projects get matched to the right product, not the one a builder happens to carry. That includes prefab systems from Boxabl and Plant Prefab, Tuff Shed conversion pathways for budget-conscious builds, and James Hardie siding and trim for fire-aware, low-maintenance exteriors. Turnaround on parts and panels from our suppliers keeps a Los Serranos project from stalling mid-frame. Learn more on our brands page.

Pricing for ADU Company in Los Serranos, CA

Service Typical range in Los Serranos
Kitchen cabinet refacing $8,000 – $15,000
Galley-to-open-concept kitchen $45,000 – $75,000
Full kitchen gut and rebuild $60,000 – $90,000
ADU feasibility and site review $500 – $1,500
ADU permit set and drawings $7,000 – $12,000
Prefab ADU foundation $25,000 – $55,000
Prefab ADU shell and install $80,000 – $150,000
Site-built ADU (400-600 sf) $200,000 – $350,000
Garage conversion ADU $90,000 – $150,000
ADU kitchen finishing $18,000 – $40,000
ADU bathroom finishing $12,000 – $30,000

Wildfire-interface requirements at the canyon edge – Class A roofing, ember-resistant vents, noncombustible exterior detailing – are the main Los Serranos variable that pushes an ADU beyond a Chino or Pomona number. We price that in from the start and stand behind fixed, line-item quotes with no change orders.

Neighborhoods We Serve in Los Serranos

We work across the 91709 zip code, from the original ranch lots near the country club corridor up to the canyon-adjacent parcels along the Carbon Canyon edge and the tract homes on the Chino Hills boundary. Each pocket has its own mix of block walls, rear alleys, and detached garages, but the driveway time is minimal for our crews.

  • Carbon Canyon edge lots
  • Country Club drive corridor
  • Chino Hills boundary tract
  • Central 91709 ranch blocks

Service Area – Cities Near Los Serranos

Beyond Los Serranos, we schedule ADU, kitchen, and bath projects throughout the neighboring cities, including Chino, CA, Yorba Linda, CA, Montclair, CA, and Pomona, CA. If you are on the county line or not sure which jurisdiction you fall under, call us – we will check the parcel before you invest in drawings.

Serving Los Serranos, CA — Our Local Coverage Area

We’re based in the Los Serranos 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 Los Serranos

Ready to get started? Free estimates · Written quotes before work starts response in Los Serranos
Call (866) 538-0916

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 Los Serranos Customers Say

★★★★★ 4.8 from 4+ reviews

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

— Marco Reyes

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

— Kristen Fletcher

"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."

— Vikram Sharma

How It Works in Los Serranos

Getting your adu handled is simple and fast.

1

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

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