Phoenix’s Premier ADU Builder for Custom and Prefab Solutions in Arizona

Q: How long does it take to build an ADU in Phoenix?

Most projects take 4–8 months , depending on size and permitting. Prefab ADUs are often faster—some complete in as little as 12 weeks once permits are approved.

Q: What sizes are allowed for ADUs in Phoenix?

Typical Phoenix accessory dwelling units range from 400 to 1,200 sq. ft. , based on your property’s zoning and lot coverage.

Q: Do you handle permits and inspections?

Yes. ERC manages the entire ADU permitting process with the City of Phoenix and surrounding municipalities.

Q: Are there financing options?

Absolutely. We guide homeowners through Arizona ADU financing programs , including HELOCs and renovation loans.

Transform your Phoenix property with a custom or prefab accessory dwelling unit designed for rental income, aging parents, or flexible space. Everything Residential & Commercial delivers one team, transparent pricing, fast permitting support, and a seamless build from start to finish.

Why Build an ADU in Phoenix, AZ?

Adding an accessory dwelling unit (ADU) to your Phoenix property is one of the most innovative ways to increase your home’s value, flexibility, and income potential. Whether you’re creating a rental unit, building a casita for family, or adding a home office, an ADU offers long-term benefits for homeowners across Arizona.

Phoenix is one of the fastest-growing cities in the U.S., and housing demand continues to rise. ADUs are now a key solution for affordable, sustainable, and multigenerational living. Local zoning updates make it easier than ever to add a backyard home or guest suite legally and efficiently. With the desert climate, energy-efficient design and innovative materials can help reduce cooling costs while adding comfort and style.

An ADU designed by Everything Residential & Commercial (ERC) gives you:

ERC specializes in both custom ADUs and prefab ADU construction in Phoenix, combining local expertise with streamlined design-build services. We handle everything—from design to Phoenix ADU permitting, so you can enjoy a stress-free experience.

Fun Fact: In Phoenix, ADUs are often called casitas or backyard homes—a nod to the Southwestern architectural style that defines the Valley.

If you’ve ever thought, “I wish I had more space”, an ADU could be your perfect solution. With new city programs supporting accessory dwelling units, it’s a great time to start your project and create lasting value for your property.

Top Uses for ADUs in Greater Phoenix

Phoenix homeowners use ADUs in creative ways that go far beyond just guest housing. ERC designs spaces that fit every lifestyle and need, including:

ERC’s guest house builders in Phoenix customize every design for privacy, light, and energy performance. With ADUs ranging from studio layouts to two-bedroom suites, we help homeowners get more from every square foot.

ADU Cost & Value in Metro Phoenix

Understanding the cost to build an ADU in Phoenix helps homeowners plan confidently. On average, prices range from $180–$350 per square foot, depending on size, materials, and finishes. Prefab ADUs are often more affordable and faster to complete—perfect for homeowners seeking a streamlined process.

Key cost factors include:

Foundation & Site Prep – Ground leveling and utility connections.
Construction Type – Prefab vs. custom builds.
Permitting & Design Fees – Managed entirely by ERC for stress-free approval.

A well-built ADU typically adds 15–25% to property value, especially in high-demand Phoenix neighborhoods like Arcadia, Tempe, and Scottsdale. Local lenders are also expanding ADU financing options in Arizona, including cash-out refinancing and home equity loans.

At ERC, we provide transparent pricing, detailed estimates, and financing guidance before you build—so you know exactly what to expect.

What Are People Say About Us

      EXCELLENT  
   Based on 54 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   ElleAnna Chacon 
 
 
 
 Trustindex verifies that the original source of the review is Google. they did a full kitchen remodel in my home and i was very satisfied with the way everything turned out. they are very knowledgeable and trustworthy. i can tell they wanted me to be 100% satisfied with the remodel and i definitely was! they surpassed my expectations!
  
 
      Posted on Google  
   
   Lauren Ramos 
 
 
 
 Trustindex verifies that the original source of the review is Google. ERC is the top of the line. They handle each build with precision, dedication and accuracy while being transparent about the outcome/timeframe.

I have had the pleasure of working with both Christian and Randy to help renovate my commercial business and will be contacting them further for any other projects.
  
 
      Posted on Google  
   
   Christopher Coleman 
 
 
 
 Trustindex verifies that the original source of the review is Google. ERC has made the construction process as easy as it can be.  The Casita is very beautiful and we're extremely happy with the results!
  
 
      Posted on Google  
   
   Steven Spirlong 
 
 
 
 Trustindex verifies that the original source of the review is Google. We used Everything Residential for a large home addition and RV garage.  Our project turned out amazing!  They were very easy to work with, and each step moved quickly after getting approved from our city.  They were a great team and all of the subs that were used on the project were highly professional and friendly.  They had good communication over the course of the project and we would highly recommend them to anyone wanting a professional, 5 star home renovation or addition.
  
 
      Posted on Google  
   
   Tonya Crosby 
 
 
 
 Trustindex verifies that the original source of the review is Google. They did a large home addition for me and it was incredible! Thank you Randy and Christian
  
 
      Posted on Google  
   
   Mitchell Nilan 
 
 
 
 Trustindex verifies that the original source of the review is Google. The level of knowledge Christian has is amazing, not to mention his team is equally as knowledgeable! Their working environment together and with everyone included is so great! Do yourself a favor and just watch a few of his videos and you will see that these guys are the EXACT group of people you need for your brand new breathtaking new addition. YOU FOUND THE RIGHT PEOPLE FOR THE JOB WHEN YOU GO WITH ERC.build, I promise you that!
  
 
      Posted on Google  
   
   Andrew Shlaimon 
 
 
 
 Trustindex verifies that the original source of the review is Google. Christian was great to work with. Very organized and efficient.
  
 
      Posted on Google  
   
   Routhier Residence 
 
 
 
 Trustindex verifies that the original source of the review is Google. These guys came in and took care of everything that needed completed for the sale of our home. I would highly recommend these guys for any of your home needs. Christian and Cody were very professional on time and got things done..
  
 
      Posted on Google  
   
   Michelle Wennerstrum 
 
 
 
 Trustindex verifies that the original source of the review is Google. They built a casita for us.  The casita turned out better than I could have imagined.   Great company to work with.  Company communication was top notch,  quality of work was 5 stars, entire crew was great, very professional.    Highly recommended!
  
 
      Posted on Google  
   
   Josh Marquez 
 
 
 
 Trustindex verifies that the original source of the review is Google. Had to build a back house for laundry and storage and Christian and his team were very clear and easy to work with. Job was done before the deadline and came out perfect. Would recommend for any job of any size!
  
 
  
  
 
 
     Verified by Trustindex  Trustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more

Our Full-Service ADU Design & Build Process

At Everything Residential & Commercial (ERC), we make it easy for Phoenix homeowners to turn ADU dreams into reality. Our turnkey Accessory Dwelling Unit Builder approach means we manage every phase—from your first site visit to final inspection—with total transparency and local expertise.

We understand that zoning rules, permits, and design details can feel overwhelming. That’s why ERC handles it all, ensuring a stress-free experience and an on-time build. Here’s how our process works:

With ERC’s design-build ADU service, you get local experience, quality craftsmanship, and a team that genuinely cares about your Phoenix home.

Permitting & Zoning Made Easy for Phoenix ADUs

Navigating Phoenix ADU permitting and zoning requirements can be challenging—but ERC makes it simple.

Our local experts work directly with City of Phoenix Development Services and nearby municipalities like Tempe, Mesa, and Glendale to ensure your accessory dwelling unit complies with all current codes. We handle:

Permit submission, revisions, and inspections
Zoning reviews for setbacks, height, and lot coverage
Utility coordination (water, sewer, and electrical connections)
Documentation for financing and insurance compliance

Because we specialize in ADU construction across Maricopa County, we stay current on evolving ADU-friendly policies and building incentives. That means faster approvals and fewer delays.

ERC’s commitment to full compliance ensures your Phoenix ADU project runs smoothly—and you stay focused on enjoying your new space.

Choose Your Phoenix ADU –
Floorplans & Options

Your space. Your style. Your ADU.

At Everything Residential & Commercial (ERC), we offer a variety of custom and prefab ADU designs to fit your Phoenix property, lifestyle, and budget. Every build is optimized for comfort, efficiency, and Arizona’s unique desert climate.

Popular ADU Types We Build

Each ADU floor plan balances privacy, natural light, and functionality—key for both homeowners and tenants. You can explore our ADU gallery (link: [ADU Gallery]) to see completed projects throughout the Phoenix metro area.

ERC’s designs include accessible options for senior living ADUs, small lot ADU solutions, and flexible upgrades like solar panels or smart home automation.

Whether you prefer a modern prefab unit or a custom-designed casita, ERC’s experts deliver professional craftsmanship with every project.

Ready to explore your design options? Contact us to view available floor plans and discover which ADU fits your property best.

Complete Construction Services
in Phoenix, AZ

Curious about what we do? Let us dive headfirst into the realms of top-notch quality and innovative ideas with us at Everything Residential & Commercial (ERC). Our arsenal of services is so extensive, ready to tackle any project thrown our way in the East Valley metro Phoenix area of Arizona. Here are our top-notch services that definitely have mind-blowing results!

Our Construction Services Don't Stop There

Why Homeowners Trust Us as Their Phoenix ADU Builder

Homeowners across the Phoenix metro area choose Everything Residential & Commercial (ERC) because we combine craftsmanship, transparency, and genuine local expertise. Our reputation as a trusted ADU contractor in Arizona comes from years of building homes that stand the test of time—both in quality and comfort.

Here’s why our clients call ERC the best ADU company in Phoenix:

From custom backyard homes to prefab ADUs, ERC focuses on doing the job right the first time. We don’t just build units—we build lasting relationships with homeowners who want peace of mind and quality results.

Frequently Asked Questions – Phoenix ADU Projects

How long does it take to build an ADU in Phoenix?

Most projects take 4–8 months, depending on size and permitting. Prefab ADUs are often faster—some complete in as little as 12 weeks once permits are approved.

What sizes are allowed for ADUs in Phoenix?

Typical Phoenix accessory dwelling units range from 400 to 1,200 sq. ft., based on your property’s zoning and lot coverage.

Do you handle permits and inspections?

Yes. ERC manages the entire ADU permitting process with the City of Phoenix and surrounding municipalities.

Are there financing options?

Absolutely. We guide homeowners through Arizona ADU financing programs, including HELOCs and renovation loans.

Start Your Phoenix ADU Project

Ready to turn your property into something more?

At Everything Residential & Commercial (ERC), we make it simple to start your ADU project in Phoenix—with a free on-site consultation and a clear, step-by-step plan. Whether you’re interested in a custom casita, a prefab ADU, or a garage conversion, our team of local experts is ready to bring your vision to life.

We proudly serve the entire Phoenix metro area, including Scottsdale, Tempe, Mesa, Glendale, Chandler, and Peoria. Each project begins with transparent pricing, fast permitting support, and personal attention from start to finish.

Request a Quote?

Here’s to building a future where every home is a masterpiece and every project is an adventure worth remembering!

Phoenix’s Premier ADU Builder for Custom and Prefab Solutions in Arizona

Why Build an ADU in Phoenix, AZ?

Rental Income Potential

Family Flexibility

Home Value Growth

Smart Living Options

Top Uses for ADUs in Greater Phoenix

Multigenerational Living

Home Offices & Studios

Airbnb or Short-Term Rentals

Home Gyms or Hobby Spaces

Pool Houses or Guest Retreats

ADU Cost & Value in Metro Phoenix

What Are People Say About Us

Our Full-Service ADU Design & Build Process

Step 1: Free Site Consultation

Step 2: Smart Design & Planning

Step 3: Permitting & City Approvals

Step 4: Construction & Finishing

Step 5: Final Walkthrough & Handover

Permitting & Zoning Made Easy for Phoenix ADUs

Choose Your Phoenix ADU – Floorplans & Options

Custom ADUs in Phoenix

Prefab ADUs in Arizona

Garage Conversions

Sustainable ADUs

Complete Construction Services in Phoenix, AZ

Casitas Design & Building

Home Remodeling & Additions

New Home Construction

Commercial Contracting

Our Construction Services Don't Stop There

Kitchen Remodeling

Bathroom Remodeling

Commercial Remodeling

Deck & Patio Builds

Why Homeowners Trust Us as Their Phoenix ADU Builder

Proven Experience

Licensed, Bonded & Insured

5-Star Reviews

Local Knowledge