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Custom ADU Construction

Your Vision. Built Right. Since 2003.

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Build More Than Space.
Build Possibility.

There comes a point when your home needs to do more.
More room for family. More flexibility for income. More space to grow without leaving the land you love.
At Orozco Construction, we design and build custom ADUs (Accessory Dwelling Units) that feel like an extension of your property rather than an afterthought. Whether you’re creating space for loved ones, building a rental unit, or planning for the future, we guide you through every step with clarity, craftsmanship, and care.
Family-owned since 2003, we serve homeowners across Southwest Washington with one goal in mind: build it right, and build it to last.

What Is a Custom ADU?

A custom ADU (Accessory Dwelling Unit) is a fully functional living space built on your existing property. 
It can be:
  • A detached backyard home
  • An attached addition
  • A converted garage or shop
  • A private in-law suite
Each ADU we build is customized to your land, your goals, and how you want to live
Detached garage ADU kitchen in Chehalis Washington with granite countertops and modern cabinetry by Orozco Construction
Custom ADU kitchen construction in Chehalis Washington by Orozco Construction with modern cabinets and countertops

Our Approach to
Custom ADU Construction

We don’t believe in one-size-fits-all builds. Every ADU is treated with intention, structure, and craftsmanship

1. Discovery & Planning

We start by understanding your property, zoning requirements, and long-term goals.

  • Site evaluation
  • Use-case planning (rental, family, guest home)
  • Budget alignment
Every custom pole barn in Chehalis we build is designed from the ground up to match your goals.

2. Design & Layout

Your ADU should feel cohesive with your main home while standing strong on its own.

  • Functional floor plans
  • Natural light optimization
  • Exterior design to match

3. Permits & Preparation

We handle the complexity so you don’t have to.

  • Local permitting requirements
  • Code compliance
  • Site prep and utilities coordination

4. Construction

This is where experience matters.

  • Foundation and framing
  • Roofing, siding, and finishes
  • Electrical, plumbing, and insulation
  • Interior build-out
Every phase is built with precision, transparency, and accountability.

Streamlined Development:

Needs Assesment

We assess your needs with both current and future use in mind.

Blueprints and Permits

We handle blueprints, permits, and all regulatory requirements.

Site Preparation

We prepare your site, pour the concrete foundation, and build your adu with efficiency and craftsmanship.

Ready to Start Building? Call now and let’s bring your vision to life.

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Custom ADU for:

Ready to Start Building? Call now and let’s bring your vision to life.

Request A Quote

Why Homeowners Are Choosing ADUs in Washington

Across Lewis County, Thurston County, and Clark County, homeowners are turning to ADUs for practical and meaningful reasons:
  • Multigenerational living without sacrificing privacy
  • Rental income opportunities to offset mortgage costs
  • Flexible guest housing for family and visitors
  • Future planning for aging in place
  • Increased property value
A well-built ADU doesn’t just add square footage. It adds freedom.
Custom detached ADU in Vancouver Washington built by Orozco Construction with modern exterior design and large windows

What Our Customers are Saying

We wanted a space for my parents that felt private but still close to home, and Orozco Construction delivered exactly that. The entire process was smooth, and the quality of the build is something we notice every single day. It doesn’t feel like an add-on. It feels like it’s always been part of our property.

Maria R.

We built an ADU to create rental income, but what we got was so much more. The design, the finishes, and the attention to detail exceeded our expectations. Orozco Construction made the process clear from start to finish, and we always felt confident in the work being done.

David L.

Ready to Start Building?

Request a quote and we’ll bring your ADU project to life.

REQUEST A QUOTE
Custom ADU kitchen in Chehalis Washington built by Orozco Construction with modern cabinets and black countertops

Types of ADUs We Build

We customize every project, but here are the most common types we construct:

Detached ADUs

Standalone structures that offer maximum privacy and flexibility.

Attached ADUs

Connected additions that expand your home while maintaining flow.

Garage Conversions

Transform underused space into a functional living area.

In-Law Suites

Comfortable, private spaces designed for family living.

Built for
Washington Living

Building in Washington requires intentional planning and durable materials. From rain exposure to soil conditions, we build ADUs that are designed to perform in the Pacific Northwest.
We proudly serve:
  • Olympia
  • Tumwater
  • Rochester
  • Centralia
  • Chehalis
  • Vancouver
  • Surrounding areas across Lewis, Thurston, and Clark Counties
Custom ADU kitchen in Chehalis Washington with modern cabinets, black countertops, and stainless steel appliances by Orozco Cons

Ready to Begin Your Project?

Request a quote and let’s create the pole barn you’ve been dreaming of.

Request A Quote
Custom ADU bathroom in Chehalis Washington with modern vanity, marble countertop, and black fixtures by Orozco Construction

Why Choose Orozco Construction

Choosing the right builder matters just as much as the build itself.

Family-Owned Since 2003

We’ve built our reputation on trust, not shortcuts

Full-Service Construction

From planning to final walkthrough, we handle it all.

Custom-Built, Never Cookie-Cutter

Every ADU is designed around your property and your goals.

Clear Communication

You always know what’s happening, when, and why

Designed With Purpose.
Built With Integrity.

An ADU isn’t just another project.
It’s where your parents may live.
Where your kids may grow.
Where your next chapter begins.
We take that seriously.

Start Your ADU Project

If you’ve been thinking about adding space, creating income, or building for the future, this is where it starts.

Your Vision. Built Right. Since 2003.
Custom detached ADU with upstairs loft in Chehalis Washington built by Orozco Construction
FAQs – Custom ADU Construction
How much does it cost to build a custom ADU in Washington?
Costs vary based on size, design, site conditions, and utilities. Most custom ADUs typically range from moderate to high investment levels, depending on finishes and complexity. We provide estimates after the planning phase.

 

Yes. ADUs require local permits and must meet zoning and building codes. We handle the permitting process for you.

 

rom planning to completion, most ADUs take several months depending on scope, permitting timelines, and site conditions.

 

In many areas across Southwest Washington, yes. Regulations vary by city and county, and we help guide you through those requirements.
In most cases, yes. A well-designed ADU can significantly increase both property value and long-term usability.

We proudly serve Olympia, Tumwater, Rochester, Grand Mound, Centralia, Chehalis. Napavine, Winlock, Toledo, Castle Rock, Vancouver, and surounding areas across Lewis, Thurston, and Clark counties.

Request A Quote

Ready to explore Our custom pole barn construction services? Contact us for a no-obligation quote.

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