ADU Company in Westminster — 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 Westminster, CA

Kitchen remodeling in Westminster, CA usually costs between $28,000 and $65,000 depending on whether you’re refreshing a 1950s ranch original or gutting a poorly permitted addition. Most of the kitchens we open up in this city share the same story: original cabinets, single-wall layouts, and ventilation that was never designed for the way Vietnamese-American families actually cook. Westminster ADU Builders handles the full scope, from first demolition through final cabinet install and countertop seal. Call (833) 620-3521 to schedule a walkthrough.

Call (833) 620-3521

Why Westminster Homes Are Different

Westminster’s housing stock is overwhelmingly 1950s through 1970s tract construction. Single-story stucco ranch homes on modest lots, many with detached or attached two-car garages and alley access along the rear property line. That layout shapes nearly every kitchen project we take on here. The original kitchens in these homes were built small, often 80 to 120 square feet, with a single window over the sink and a door leading to the garage or side yard.

The climate works in your favor for scheduling. Westminster sits in the coastal-inland band of Orange County, so we rarely lose days to rain between May and October. Winters bring occasional storm systems and marine-layer humidity, which matters more for exterior work but can still affect a kitchen that backs up to a poorly flashed exterior wall. More than once we’ve opened a wall during a February remodel and found moisture staining behind the sink base cabinet from years of stucco hairline cracks.

Another Westminster-specific reality: unpermitted additions are common. Homeowners in the 1970s and 1980s enclosed patios or extended kitchens without pulling permits. When you buy one of these homes and start planning a remodel, the first question is always whether the existing square footage was ever approved. We check permit history as a standard first step, because discovering an unpermitted kitchen bump-out mid-project changes scope, schedule, and budget.

Our Main Westminster Services

Kitchen remodeling is the call we get most often, but two other services run close behind for Westminster homeowners. Here’s what each involves locally.

ADU Builders in Westminster

Westminster is one of Southern California’s densest Little Saigon communities, and ADU demand here runs through multigenerational households. Homeowners want a rear-yard unit for aging parents or adult children, which means kitchenettes built for real cooking: strong ventilation, gas lines, and surfaces that hold up to daily use. The city’s older tract parcels usually point toward garage conversions rather than ground-up builds, since alley-served rear yards and existing slabs make conversion the more practical path. We walk clients through prefab brands like Abodu and Dvele alongside traditional site-built options, then recommend based on the lot, not the catalog. See how we approach this at ADU Builders in Westminster.

ADU Builders in Westminster

Bathroom Remodeling in Westminster

Bathrooms in Westminster’s 1950s-to-1970s homes are almost universally undersized by current standards. Five-foot-by-eight-foot full baths with single-sink vanities and tub-shower combos are the norm. When we remodel one, the typical scope includes removing the tub for a curbless shower, adding a vent fan that actually exhausts to the outside, and correcting subfloor rot common in these older slabs. For homes adding an ADU, we often remodel the main bath and build the ADU bath in the same permit cycle, keeping the whole project under one contract. Details are at Bathroom Remodeling in Westminster.

Bathroom Remodeling in Westminster
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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 Westminster

Westminster kitchens in 1950s and 1960s ranch homes run small, dark, and under-ventilated, with original cabinets that have outlived their usefulness and layouts built for a different era of cooking. The moisture from coastal-inland weather and decades of stucco exposure means we routinely find wall damage behind sink bases and range backsplashes once demolition starts. Adding an ADU often pushes homeowners to reconsider the main kitchen at the same time, since the same crew can handle both scopes. For a fuller look at our process, see Kitchen Remodeling.

Galley Kitchen Renovation

Signs you need it

You have one usable counter, appliances stacked against a single wall, and two people cannot stand in the kitchen at the same time without shoulder contact.

What it costs in Westminster

Galley kitchen renovations in Westminster generally run $28,000 to $48,000 depending on cabinet quality, countertop material, and whether we’re moving plumbing or gas lines.

How we do it

We open the wall between kitchen and dining area where structurally possible, relocate the refrigerator to create a proper work triangle, and add a ventilation hood that ducts to the outside.

Full Kitchen Gut and Rebuild

Signs you need it

The layout does not work, the subfloor or wall framing has water damage, and you want to change the kitchen footprint rather than patch what’s there.

What it costs in Westminster

A full gut-and-rebuild in Westminster ranges from $48,000 to $85,000, with most projects landing in the $55,000 to $65,000 range once you factor in new plumbing, electrical, and structural work.

How we do it

We strip the kitchen to studs and slab, replace damaged framing, run new plumbing and electrical, then rebuild with a layout sized for the way your household cooks.

What Kitchen Remodeling Costs in Westminster

Item Typical range in Westminster
Galley kitchen renovation $28,000 – $48,000
Full kitchen gut and rebuild $48,000 – $85,000
Cabinet refacing and countertop replacement $14,000 – $22,000

Unpermitted prior work and water damage are the two things that push Westminster kitchen jobs higher than the initial estimate. We give upfront pricing and flag likely overages before demolition begins.

How long does a kitchen remodel take in Westminster?

A galley renovation runs 4 to 6 weeks. A full gut-and-rebuild runs 8 to 12 weeks. Permit approval time in Westminster varies by scope, but we submit plans early and keep the construction phase moving. Call (833) 620-3521 for a timeline specific to your kitchen.

Do you handle the permits for a Westminster kitchen remodel?

Yes. We pull all required Westminster building permits, schedule inspections, and close out the permit with the city. If we find unpermitted prior work, we include the correction in your scope and budget before we start. Call (833) 620-3521 and we’ll check your address.

Brands We Service in Westminster

We work with James Hardie fiber-cement products for any exterior portion of a kitchen remodel that opens onto a patio or side yard, and we specify Abodu, Cover, and Dvele for ADU projects that pair with a main-home kitchen update. Parts and samples for these brands are stocked locally or sourced within days. See our brands for the full list.

Pricing for ADU Company in Westminster, CA

Service Typical range in Westminster
Galley kitchen renovation $28,000 – $48,000
Full kitchen gut and rebuild $48,000 – $85,000
Cabinet refacing and countertop replacement $14,000 – $22,000
ADU construction (garage conversion) $150,000 – $280,000
ADU construction (ground-up detached) $200,000 – $400,000
Bathroom remodel (main home) $18,000 – $38,000
Bathroom remodel (ADU) $12,000 – $24,000
Ventilation and range hood upgrade $1,800 – $4,500

In Westminster, the two biggest price push factors are hidden water damage in 60-year-old walls and the cost of bringing unpermitted prior work up to current code. Every quote we give is a fixed written line-item quote, and we do not send change orders without your signed approval first.

Neighborhoods We Serve in Westminster

We work across all of Westminster, from the alley-loaded tracts south of Bolsa Avenue to the mid-century streets north of the 405. Most of our kitchen and ADU projects cluster in the older single-family neighborhoods where garages and original kitchens are both due for replacement.

  • Bolsa Chica area
  • Little Saigon corridor
  • Westminster Village
  • Westminster East
  • Midway City border

We can usually schedule an initial walkthrough within 5 to 7 business days for homeowners anywhere in Westminster.

Service Area – Cities Near Westminster

Westminster ADU Builders also serves the surrounding Orange County communities where the housing stock and permit realities are similar. We regularly work in Midway City, CA, Garden Grove, CA, Stanton, CA, and Huntington Beach, CA. If your home sits near one of these borders, your project may share Westminster’s garage-conversion and unpermitted-addition patterns.

Serving Westminster, CA — Our Local Coverage Area

We’re based in the Westminster 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 Westminster

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Call (833) 620-3521

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 Westminster Customers Say

★★★★★ 5.0 from 4+ reviews

"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."

— Erin Quinn

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

— Lisa Hayes

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

— Daniel Norris

How It Works in Westminster

Getting your adu handled is simple and fast.

1

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

2

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A background-checked, certified technician arrives in Westminster — 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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