ADU Company in Mission Viejo — 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 Mission Viejo, CA

Kitchen remodeling in Mission Viejo means working with late-1960s through 1980s tract homes where original layouts, aging plumbing rough-ins, and stucco-and-clay-tile construction create a specific set of challenges. Most Mission Viejo kitchens we see haven’t been touched since the last century, so the work involves more than swapping cabinets: we’re moving supply lines in slab foundations, opening walls that may be load-bearing, and matching new work to older framing. If you’re starting to research costs and scope, call (877) 658-7475 and we’ll tell you what your specific floor plan will actually require.

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Why Mission Viejo Homes Are Different

Mission Viejo was built as a master-planned community starting in the late 1960s, and that planning history still shapes every ADU and remodel project here. The Mission Viejo Company cut the city into planned tracts, wrapped them with homeowners associations, and left behind architectural-review committees that still control exterior appearance, color palettes, and even where an ADU can sit on a sloped rear yard. City permits are one thing; getting past an HOA architectural submittal is often the real gate.

The housing stock reflects that era: stucco exteriors, clay-tile roofs, slab foundations, and lots that are smaller and more uniformly graded than in older Orange County cities. Many rear yards slope into greenbelts or the city’s trail corridors, and both the HOAs and the city’s drainage rules care about how and where you build. That means kitchen remodels and ADU additions in Mission Viejo require a contractor who reads HOA CC&Rs as carefully as plan check comments. The semi-arid inland climate adds its own layer: hot, dry summers and Santa Ana wind events push us toward fire-resistant detailing and cooling-focused design, especially on lots near the Saddleback foothills or Oso Creek corridor.

Our Main Mission Viejo Services

ADU and bathroom work are the two calls we get most often from Mission Viejo homeowners, and each one carries its own local weight.

ADU Builders in Mission Viejo

ADU projects in Mission Viejo live and die by lot geometry and HOA architectural approval. Detached units work on some Mission Viejo lots, attached conversions work on others, and rear-yard slopes or greenbelt setbacks rule out options that would work three miles away in Lake Forest. We match the build type to your actual lot, and we know which Mission Viejo tracts have the strictest CC&R language around secondary units. Our team works across leading prefab brands including Abodu, Cover, and Plant Prefab, and we pair that with in-house kitchen and bath finishing so the unit is truly turnkey. For the full picture on detached units, garage conversions, and prefab delivery in Mission Viejo, see ADU Builders in Mission Viejo.

ADU Builders in Mission Viejo

Bathroom Remodeling in Mission Viejo

1960s and 1970s Mission Viejo bathrooms are famous for two things: compact footprints and cast-iron or galvanized drain lines that have earned their retirement. A bathroom remodel here often becomes a plumbing-upgrade project, and doing it wrong means opening a slab that your HOA definitely wants left alone. We handle the full scope under one contract, from fixture layout to waterproofing to the final tile, and we sequence work so a master bath in a Mission Viejo tract home doesn’t turn into a three-month ordeal. Details on timelines, shower conversions, and what Mission Viejo bath remodels cost are on the Bathroom Remodeling in Mission Viejo page.

Bathroom Remodeling in Mission Viejo
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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 Mission Viejo

Kitchen remodeling in Mission Viejo is usually about fixing the original footprint: a closed-off galley or U-shaped kitchen with a peninsula cutting the room in half, fluorescent soffits overhead, and plumbing that predates modern fixture spacing. We open walls where the structure allows, reroute supply lines, and bring ventilation up to current code, all while matching the work to Mission Viejo’s stucco-and-clay-tile construction. The payoff is a kitchen that handles how people here actually live now: open to the family room, with a layout that works for cooking and hosting. Every project starts with a plan and a fixed line-item quote, and our Kitchen Remodeling approach is built around that transparency.

Full Kitchen Gut and Rebuild

Signs you need it

Your Mission Viejo kitchen has its original 1970s or 1980s cabinets, the layout fights you every time you cook, and the subfloor or drywall shows water damage from decades-old supply lines.

What it costs in Mission Viejo

A full kitchen gut and rebuild in Mission Viejo typically lands between $27,000 and $50,000 depending on slab work, wall removal, and finish level.

How we do it

We demo to the studs, move or replace plumbing and electrical, reframe any opened walls, then install new cabinetry, countertops, appliances, flooring, and lighting in one continuous sequence.

Cabinet Refacing and Layout Refresh

Signs you need it

Your cabinet boxes are structurally sound but the doors, drawer fronts, and layout aren’t working, and a full gut isn’t in the budget.

What it costs in Mission Viejo

Cabinet refacing and layout refresh work in Mission Viejo ranges from $9,500 to $18,000, with the spread driven by door style, hardware, and whether we’re moving any plumbing or appliance positions.

How we do it

We replace all doors and drawer fronts, add soft-close hardware, adjust the layout with new or modified cabinet boxes, and finish with trim, counters, and a fresh backsplash.

Countertop and Backsplash Replacement

Signs you need it

Your Mission Viejo kitchen still has original tile counters or laminate that’s chipped and dated, but the cabinet layout itself works fine.

What it costs in Mission Viejo

Countertop and backsplash replacement in Mission Viejo typically runs $4,500 to $9,000 depending on material and linear footage.

How we do it

We template and remove the old surfaces, prep the substrate, and install new stone or quartz counters with a matched backsplash, including sink and faucet reconnection.

What Kitchen Remodeling Costs in Mission Viejo

Item Typical range in Mission Viejo
Full kitchen gut and rebuild $27,000 – $50,000
Cabinet refacing and layout refresh $9,500 – $18,000
Countertop and backsplash replacement $4,500 – $9,000

Does a Mission Viejo kitchen remodel require HOA approval?

Usually not for interior work if you’re not moving plumbing through walls or changing the home’s exterior footprint, but some tract HOAs want to know about any structural wall removal. We check your CC&Rs before you commit.

Will my 1970s Mission Viejo kitchen need plumbing upgrades?

Often yes. Galvanized supply lines and cast-iron drains from that era are at end of life, and we quote the replacement as a line item up front so it never becomes a surprise change order. Call (877) 658-7475 for a fixed quote.

Brands We Service in Mission Viejo

We spec and install across a broad brand range in Mission Viejo, with James Hardie fiber-cement exteriors on ADU builds and Tuff Shed as a shed-to-ADU conversion pathway. Cabinetry, countertops, and fixtures are sourced to match your finish level. If you have a brand in mind, we’ll tell you honestly whether it fits the project before you spend anything. See our brands for the full picture.

Pricing for ADU Company in Mission Viejo, CA

Service Typical range in Mission Viejo
Full kitchen gut and rebuild $27,000 – $50,000
Cabinet refacing and layout refresh $9,500 – $18,000
Countertop and backsplash replacement $4,500 – $9,000
ADU project planning and HOA submittal support $2,000 – $6,500
Prefab ADU delivery and site prep $12,000 – $28,000
Attached ADU conversion $95,000 – $180,000
Detached ADU build $150,000 – $350,000
Bathroom remodel $18,000 – $40,000

Mission Viejo prices climb when a job involves slab plumbing work, HOA-mandated exterior upgrades, or rear-yard slope corrections that force extra foundation or drainage work. Everything we bid is a written line item with fixed pricing, so the number on your quote is the number you pay.

Neighborhoods We Serve in Mission Viejo

We work across all of Mission Viejo, including the tracts where HOAs are strictest and the older neighborhoods where original construction is now hitting the 50-year mark. Typical response for an estimate request is one business day.

  • Lake Mission Viejo
  • Mission Ridge
  • Stoneridge
  • Casta del Sol
  • Palmia
  • Canyon Crest

Service Area – Cities Near Mission Viejo

Casita ADU Builders serves Mission Viejo and the surrounding south Orange County cities. If you’re next door, we cover Coto De Caza, CA, Lake Forest, CA, Laguna Hills, CA, and Rancho Santa Margarita, CA with the same fixed-price quoting and HOA-aware approach.

Serving Mission Viejo, CA — Our Local Coverage Area

We’re based in the Mission Viejo 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 Mission Viejo

Ready to get started? Free estimates · Free written quotes response in Mission Viejo
Call (877) 658-7475

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 Mission Viejo 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."

— Arjun Singh

"Detached unit in the back yard. Utilities trenched, separate meter, and it passed final on the first inspection."

— Robert Gallagher

"Garage conversion to a one bedroom unit. He handled the plans, the city submittal, and every round of corrections. Took six months from first meeting to final inspection and he never once made the permit process my problem."

— Aisha Prince

How It Works in Mission Viejo

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 Mission Viejo — 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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