Casita and ADU Builders in Arizona
Arizona is the one state here with a mandatory by-right ADU law. HB 2720 took effect in January 2025 and requires every city over 75,000 people to allow one attached and one detached unit on a single-family lot without discretionary review, and a follow-up bill extended much of that to county land. Locally the building is called a casita, which is worth knowing, because plenty of the best builders never use the word ADU. Desert construction has its own demands: shade, roof assemblies that survive 115 degrees, and cooling loads that make the insulation spec the whole argument. This page covers Phoenix, Scottsdale, Tempe, Mesa, Chandler and Tucson.
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Scottsdale-based design-build firm founded by brothers Danny and Aaron Niemela, specializing in luxury guest houses and casitas alongside full home remodels and custom builds.
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Licensed Phoenix casita builder offering pre-approved floor plans and turnkey construction management from permitting through occupancy, with designs ranging from 400 to 784 square feet.
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Phoenix-area casita and ADU builder founded by two experienced contractors with 50+ years combined experience. Serves multiple Phoenix communities and emphasizes transparency and direct client communication.
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A general contractor founded in 2010 by Scott and Mari Senden, now operating dual offices in Phoenix and Tucson. Specializes in custom casitas, guest homes, and ADUs across Southern Arizona with an engineering-focused approach to structural integrity and desert-climate design.
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A full-service casita and ADU builder with 30 years of Arizona construction experience, offering custom site-built guest houses and accessory dwelling units across the state. No prefab and no modular, every unit is site-built by their team.
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Scottsdale-based site-built specialist with over 100 completed guest homes and small custom dwellings, offering four core ADU models from studio to two-bedroom layouts.
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Tucson-based specialist in site-built ADU construction, offering design, permitting, and financing assistance with transparent pricing and a focus on energy-efficient, eco-friendly builds.
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Tucson-based casita and ADU builder bringing 60 years of combined construction experience to small, efficient homes. Works closely with designers and homeowners on custom projects in central Tucson neighborhoods.
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Locally owned East Valley builder with over 60 combined years of experience, specializing in site-built casitas, custom homes, and multigenerational properties across the Phoenix metro.
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Phoenix-based casita and addition builder offering site-built guest houses, multi-room additions, and in-law suites with full permit coordination and in-house design guidance since 2006.
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Licensed Tucson and Phoenix general contractor established in 2007, specializing in site-built ADUs, casitas, guesthouses, and garage conversions with structured design-build process.
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Female-owned, minority-led Phoenix-area remodeling firm with a dedicated ADU and casita construction service line, serving 11 Valley cities with fixed-price proposals and financing options.
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Family-owned Tucson ADU builder founded by a University of Arizona graduate, specializing in stick-built custom ADUs with sustainable design, transparent pricing, and long-term operational focus.
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West Valley design-build contractor specializing in ADU construction, custom homes, and comprehensive remodeling with fixed pricing and onsite project managers across Arizona.
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Family-owned Gilbert builder with 30+ years constructing custom homes and casitas across the Phoenix metro, staffed with in-house architects and bilingual specialists.
Frequently asked questions
How does the new Arizona law affect my ability to build an ADU?
As of January 2025, HB 2720 requires cities with over 75,000 residents to allow one attached and one detached unit on a single-family lot without discretionary review. This law also extends much of these permissions to county land.
Do the builders in this directory offer prefab or modular units?
Some builders focus exclusively on site-built construction to ensure custom quality. For example, Arizona Casita Builders does not offer prefab or modular options, preferring custom site-built guest houses instead.
Can I find a builder that handles the entire process from design to permitting?
Yes, several listed firms provide turnkey services. AZ ADU offers management from permitting through occupancy, while Rise Above Remodeling provides full permit coordination and in-house design guidance.
Are there options for smaller, more affordable casitas?
Many builders specialize in small-scale dwellings. AZ ADU offers floor plans ranging from 400 to 784 square feet, and Minimal Living Concepts provides four core models ranging from studios to two-bedroom layouts.
I live in Tucson or the East Valley. Are there local builders near me?
You have several regional options. Prism Construction and Unstoppable Construction specialize in the Tucson area, while Nu Wavz Homes serves the East Valley and Phoenix metro.