ADU Company in Westminster, CA
Kitchen remodeling in Westminster usually means working inside a 1950s – 1970s single-story stucco home where the original footprint was built small and the electrical panel wasn’t sized for today’s appliances. Sunstone ADU Builders handles the full interior scope, from moving a load-bearing wall to installing cabinetry and ventilation that holds up through warm Santa Ana stretches and damp marine-layer mornings. If you’re planning an ADU and want the primary home’s kitchen done at the same time, one contract covers both. Call (855) 949-1913 to talk through your Westminster project.
Why Westminster Homes Are Different
Westminster’s 92683 core is block after block of older, closely-spaced tract homes on modest parcels. Most were framed when a 100-amp panel was standard, a single-car garage was enough, and nobody imagined a second dwelling in the backyard. That history shows up on almost every ADU and kitchen job we take here. Electrical service is often the first constraint we flag: an ADU with a kitchenette and mini-split will typically require a panel upgrade, and the existing underground or overhead service routing determines how involved that gets. The narrow side yards, many with a rear alley or driveway on only one side, push detached ADUs into the corner of the lot that already holds a garage and mature citrus or avocado trees most homeowners want left alone. The climate is forgiving in terms of heating loads, but the warm, dry Santa Ana periods and the persistent humidity from the coast mean moisture management and ventilation get real attention in our Westminster specs.
Our Main Westminster Services
Westminster homeowners usually call us about one of two projects: building a backyard unit for family or renters, or bringing an older bathroom up to the standard of the rest of the house, often in the same pull permits window as an ADU.
ADU Builders in Westminster
Building an ADU in Westminster means designing around small lots, narrow setbacks, and existing garages that often stay in place. We build detached units, garage conversions, and attached additions, and we’re an authorized builder for prefab brands including Abodu, Cover, Dvele, Mighty Buildings, Boxabl, and Plant Prefab. For 92683 parcels, the usable backyard corner is frequently behind the garage, which shapes the unit footprint from day one. See how we approach ADU Builders in Westminster work, including permitting and lot-coverage realities.
Bathroom Remodeling in Westminster
Many Westminster bathrooms date to the same 1950s – 1970s build as the house itself, with small footprints, dated layouts, and exhaust fans that don’t move enough air for our humidity. Whether the bathroom is inside a new ADU or in the primary home, we handle the full interior finish: plumbing rework, waterproofing, tile, fixtures, and ventilation that actually clears moisture after a shower. See our Bathroom Remodeling in Westminster page for project scope and what remodeling costs here.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Kitchen Remodeling in Westminster
Kitchen remodeling in Westminster almost always starts with an older home built when kitchens were closed off from the living space and wired for far fewer appliances. The job here typically means opening the plan, upgrading the panel, adding proper ventilation for marine-layer humidity, and building a kitchen that can handle daily multigenerational use. Because we also build ADUs, we’re used to scoping kitchens that work hard in small square footage, whether it’s the primary home or a rental-ready unit. See our Kitchen Remodeling service hub for the full range of what we do.
Full Kitchen Reconfiguration
Signs you need it
Your Westminster kitchen has the original closed-off footprint, the work triangle doesn’t work for more than one cook, and there’s no sightline to the dining or living area.
What it costs in Westminster
A full reconfiguration in Westminster, including moving plumbing and electrical and opening a load-bearing wall, typically runs $45,000 – $75,000 depending on structural scope and finish level.
How we do it
We start with as-built measurements and load-path confirmations on your Westminster home, then design the new layout, pull permits, frame and route utilities, and finish to paint and trim under one contract.
Cabinet and Countertop Replacement
Signs you need it
Your Westminster cabinets are original oak or dated laminate, doors are sagging, and countertops are worn laminate or tired tile with failing grout.
What it costs in Westminster
Cabinet and countertop replacement in Westminster generally falls between $16,000 and $32,000 for a typical galley or L-shaped kitchen, depending on line and material.
How we do it
We remove the existing casework, verify the walls are sound, then install new semi-custom or custom cabinetry and counters with scribe-fit against Westminster’s often out-of-plumb older walls.
What Kitchen Remodeling Costs in Westminster
| Item | Typical range in Westminster |
|---|---|
| Cosmetic refresh (paint, hardware, backsplash, lighting) | $8,000 – $18,000 |
| Cabinet and countertop replacement | $16,000 – $32,000 |
| Full kitchen reconfiguration with structural work | $45,000 – $75,000 |
What pushes cost up in Westminster is the older electrical service, which often needs a panel upgrade before the kitchen rough-in can pass inspection, plus any plumbing moves in a slab foundation. We give line-item pricing up front and do not change the number once the work starts unless you change the scope.
How long does a kitchen remodel take in Westminster?
Plan on 6 to 10 weeks for a full reconfigure, and 3 to 5 weeks for a cabinet and countertop replacement. Permit review times in Westminster can add two to four weeks before demo starts. Call (855) 949-1913 for a timeline based on your project.
Will I need a panel upgrade for a Westminster kitchen remodel?
Most 1950s – 1970s Westminster homes run on 100-amp service, and adding the circuits a modern kitchen needs often requires a 200-amp panel. We confirm this during the estimate so it’s in your price before you sign.
Brands We Service in Westminster
We specify and service several ADU and exterior brands for Westminster projects, including Boxabl, Plant Prefab, Tuff Shed, and James Hardie fiber cement siding. These brands let us match the build method to your site and timeline, and the Hardie cladding handles Westminster’s damp-morning, dry-wind swings well. See our brands for the full list.
Pricing for ADU Company in Westminster, CA
| Service | Typical range in Westminster |
|---|---|
| Kitchen cosmetic refresh | $8,000 – $18,000 |
| Kitchen cabinet and countertop replacement | $16,000 – $32,000 |
| Full kitchen reconfiguration | $45,000 – $75,000 |
| ADU feasibility and design | $4,000 – $10,000 |
| Prefab ADU (turnkey, site work included) | $180,000 – $350,000+ |
| Traditional stick-built ADU (turnkey) | $250,000 – $450,000+ |
| Garage conversion to ADU | $120,000 – $220,000 |
| Bathroom remodel (cosmetic) | $14,000 – $30,000 |
| Bathroom remodel (full gut and rework) | $30,000 – $60,000+ |
Westminster pricing is pushed up most often by panel upgrades on older 92683 homes and by foundation work when a garage slab needs trenching for a kitchenette or bath. You get a written, line-item quote before work begins, and we hold that number unless you add scope.
Neighborhoods We Serve in Westminster
We work throughout Westminster’s 92683, 92684, and 92685 ZIP codes, from the older tract blocks near Bolsa Avenue and Westminster Boulevard to the newer pockets farther south and west. We schedule estimates across the city within a few business days, and our team is already familiar with the lot patterns and older electrical service common to this area.
- 92683 core tract neighborhoods
- Areas near Westminster Mall and I-405
- Westminster east of Beach Boulevard
- Neighborhoods bordering Midway City and Garden Grove
- South Westminster near Heil Avenue
Service Area – Cities Near Westminster
Sunstone ADU Builders also serves homeowners in adjacent Orange County cities. If you’re just over the Westminster line, we cover Midway City, CA, Garden Grove, CA, Stanton, CA, and Huntington Beach, CA with the same ADU and interior remodeling scope.
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
We typically begin design and site measurements within two weeks of our first walkthrough, then move into permit drawings right away. Westminster permit review times vary by project type, but we keep your application moving and coordinate inspections as they’re scheduled.
We prepare and submit the permit set to the City of Westminster and manage comments through approval. If your neighborhood has an HOA with design-review rules, we provide the drawings and material specs they need, though you’ll submit the review request as the property owner.
Yes. We routinely package a Westminster ADU with a primary-home kitchen or bath remodel, which shares mobilization, design time, and site supervision. That’s the point of having the interior finishes in-house rather than hiring a second contractor after the unit is up.
Planning an ADU, kitchen remodel, or bathroom update in Westminster? Call (855) 949-1913 for a free estimate and a straight answer on what your lot and home can support.
What happens when you call
- 1A real person answersNo phone trees — talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you — the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Westminster Customers Say
"Detached unit in the back yard. Utilities trenched, separate meter, and it passed final on the first inspection."
— Reggie Ellison"Knew the local setback and parking rules cold, which saved us from designing something that would never have been approved."
— Doug Padgett"He was honest that our lot had a slope problem that would add real cost, before we signed anything."
— Paul Pruitt