ADU Company in Mission Viejo — 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 Mission Viejo, CA

Kitchen remodeling in Mission Viejo means working inside homes built mostly between the 1960s and 1980s, when floor plans were tighter and kitchens were closed off from living space. We regularly open up these galley-style kitchens, reroute plumbing and electrical, and bring in finishes that handle the dry heat and daily use without wearing out. Cottage ADU Builders has served Mission Viejo since 2012, and we know which walls in these tract homes are load-bearing before we ever swing a hammer. Call (866) 808-7312 to talk through your project.

Call (866) 808-7312

Why Mission Viejo Homes Are Different

Mission Viejo is a master-planned community, and that changes how every remodeling and ADU project unfolds. Most single-family homes sit in tract developments governed by strict CC&Rs and HOA architectural review. That means a project must clear city permit requirements first, then pass a separate HOA design review, which is often the slower and more particular step. For ADUs specifically, the city’s hillside and slope-density standards add another layer of review on lots with any meaningful grade change. What works on a flat lot in 92691 may not be approvable around the hills of 92692. The housing stock itself is almost universally 1960s to 1980s stucco construction, single-story and two-story, with attached garages. In kitchens, that era means original cabinetry, dated tile counters, and often a soffit above the upper cabinets that eats storage space. We know where to look for surprises in these homes because we have opened dozens of them across Mission Viejo.

Our Main Mission Viejo Services

Two services dominate the calls we get from Mission Viejo homeowners: building an ADU on an existing lot, and remodeling bathrooms inside these older tract homes. Both come with HOA and permit layers that a general contractor from outside the area will not anticipate.

ADU Builders in Mission Viejo

Most Mission Viejo ADUs start as attached garage conversions because the original lots are small and rear setbacks are shallow. Second-story units above garages are possible on some lots but face HOA design restrictions more often than not. We handle the full process, from checking your lot’s feasibility against city ADU ordinances and HOA guidelines to selecting a prefab or modular system that fits your budget and site access. We work with brands like Abodu, Cover, and Dvele, and we know how to sequence factory delivery, site prep, and utility hookups so the project does not stall. Read more on our dedicated page: ADU Builders in Mission Viejo.

ADU Builders in Mission Viejo

Bathroom Remodeling in Mission Viejo

Original bathrooms in 1970s and 1980s Mission Viejo tract homes are usually small, with a tub-shower combo, a single vanity, and tile that has seen better decades. Remodeling here often means reworking the footprint slightly, improving ventilation, and choosing surfaces that hold up to hard water. We also coordinate the rough-in work when a bathroom remodel runs alongside an ADU build on the same property, so you are not juggling two crews. See the full scope here: Bathroom Remodeling in Mission Viejo.

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 usually means working inside a 1960s to 1980s stucco tract home where the original layout closed the kitchen off from the rest of the house. Homeowners here want more counter space, better light, and a connection to the dining or family room without sacrificing storage. The dry, semi-arid climate also matters when choosing finishes; materials that handle low humidity and big temperature swings between day and night last longer. Whether you are updating a small galley kitchen in 92690 or reworking a larger two-story floor plan in 92691, the job starts with knowing which walls carry load and which can come out. Learn more about our general approach on our Kitchen Remodeling page.

Galley Kitchen Opening

Signs you need it

You have a long, narrow cooking space with a single path of movement, and the room feels cut off from the rest of the house even when the family is home.

What it costs in Mission Viejo

Opening a galley kitchen in Mission Viejo typically runs $45,000 to $85,000 depending on whether the wall you remove is load-bearing and how much reframing the ceiling requires.

How we do it

We identify load-bearing conditions, design the beam or header, pull the Mission Viejo building permit, remove the wall, reroute any mechanicals, and finish the new open transition so it looks original to the house.

Full Kitchen Renovation

Signs you need it

Every surface is original, the cabinet boxes are particleboard that has swollen or sagged, and the layout no longer matches how your family cooks and gathers.

What it costs in Mission Viejo

A full kitchen remodel here commonly lands between $65,000 and $120,000, driven by cabinet grade, countertop material, and how much electrical and plumbing work the 1970s-era rough-in needs.

How we do it

We demo to the studs where needed, upgrade the electrical circuits and plumbing, install new cabinetry and counters, set the appliances, and handle the HOA review if your exterior vent or window changes are visible from the street.

What Kitchen Remodeling Costs in Mission Viejo

Item Typical range in Mission Viejo
Galley kitchen opening $45,000 – $85,000
Full kitchen renovation $65,000 – $120,000
Countertop and backsplash replacement $8,000 – $18,000

Hillside lots or homes where original plumbing runs through a slab can push the higher end of these ranges. We quote the job with a written line-item estimate before work starts, and our fixed pricing means the number you approve is the number you pay.

How long does a kitchen remodel take in Mission Viejo?

Most Mission Viejo kitchen remodels run 6 to 10 weeks from demo to final walkthrough. HOA design review can add 2 to 4 weeks before we even pull the permit, so plan for that step early. Call (866) 808-7312 for a schedule based on your actual scope.

Do I need HOA approval for a kitchen remodel in Mission Viejo?

Interior-only kitchen work usually does not need HOA review, but any exterior change like a new vent hood, window, or door does. We check your specific HOA guidelines before we start and prepare the submittal package if design review is required. Call (866) 808-7312 and we will walk you through it.

Brands We Service in Mission Viejo

Our team in Mission Viejo works with the brands you have likely already researched: Boxabl, Plant Prefab, Tuff Shed, and James Hardie siding on applicable ADU exteriors. We stock common installation parts locally, which keeps small fixes moving without waiting on a factory order. For a fuller look at the systems we work with, visit our brands page.

Pricing for ADU Company in Mission Viejo, CA

Service Typical range in Mission Viejo
Galley kitchen opening $45,000 – $85,000
Full kitchen renovation $65,000 – $120,000
Countertop and backsplash replacement $8,000 – $18,000
Attached garage conversion ADU $120,000 – $220,000
Prefab studio ADU (one bedroom) $150,000 – $260,000
Two-bedroom prefab ADU $230,000 – $390,000
Second-story ADU above garage $210,000 – $350,000
Bathroom remodel (standard, no layout change) $22,000 – $40,000
Bathroom remodel (layout change) $35,000 – $60,000
Primary bathroom remodel $45,000 – $75,000

In Mission Viejo, the two biggest price drivers are HOA-mandated design revisions and lot conditions like slope or tight rear setbacks that affect ADU foundation work. We give you a written, line-item price up front, and our fixed pricing means no change orders unless you change the scope yourself.

Neighborhoods We Serve in Mission Viejo

We work across Mission Viejo every week, from the flatter tract streets of 92691 to the hillside communities around 92692 and the original planned developments of 92690.

  • Lake Mission Viejo area
  • Pacific Hills
  • La Paz corridor
  • Casta del Sol
  • Aegean Hills

Response time for a quote across the city is usually within one to two business days, and we schedule estimates around your availability rather than asking you to wait through a four-hour window.

Service Area – Cities Near Mission Viejo

Cottage ADU Builders also covers the surrounding South Orange County communities where the housing stock and HOA realities are similar. We work regularly in Coto De Caza, CA, Lake Forest, CA, Laguna Hills, CA, and Rancho Santa Margarita, CA. If your home sits in any of these areas, the same crew and the same fixed-price process apply.

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 (866) 808-7312

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."

— Shane Miller

"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."

— Amanda Walsh

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

— Lucia Flores

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

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We complete the job to your full satisfaction, backed by our warranty and 100% satisfaction guarantee.

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Areas We Serve
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