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TUCSON ADU REQUIREMENTS
ADU Regulations Homeowners Should know
ADU REGULATIONS 2026 UPDATED
ADUs Are Now Allowed “By-Right” Statewide
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As of January 1, 2026, ADUs are effectively legal across Arizona on most residential lots
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If cities/counties didn’t adopt rules, state law automatically allows ADUs anyway
→ You generally no longer need special approvals, rezoning, or variances.
TUCSON ADU REQUIREMENTS
What you're allowed to build
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At least 1 attached + 1 detached ADU per lot
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Potential for additional ADUs on larger lots (1+ acre)
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Size limits:
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Up to 75% of the main home
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Typically capped around 1,000 sq ft
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→ More flexibility than ever, but still within reasonable size limits.
Local Government has limited restrictions
Cities and counties cannot:
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Require additional parking
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Require matching exterior design
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Require family-only occupancy
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Impose stricter setbacks than primary homes
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Force restrictive covenants for approval
→ The state has removed many of the barriers that previously slowed projects down.
Rental Rules Updated 2026
Rental Rules for Casitas & ADU's
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Long-term rentals are fully allowed
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Owner occupancy is NOT required for long-term renting
⚠️ However:
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Short-term rentals (Airbnb-style) are more restricted and evolving
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Some proposals aim to limit or prohibit ADU short-term rentals
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HOAs can still impose their own rules
→ Rental income is viable — but short-term use is less certain.
TUCSON ADU REQUIREMENTS
Counties Are Now Required to Allow ADUs Too
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HB 2928 expanded rules beyond cities → applies to counties as well
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Counties must allow ADUs on residential lots
→ Even rural or unincorporated areas are now included.
Important limitations still apply
Even with easier laws, you still must follow:
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Building & safety codes
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Fire and access regulations
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Utility and septic requirements
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No building over utility easements without approval
🚫 ADUs may be restricted in:
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Airport zones
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Military zones
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Tribal land
Short summary
In 2026, Arizona ADU laws now:
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Make ADUs widely legal statewide
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Allow multiple units per lot (in many cases)
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Support rental income opportunities
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Limit local government restrictions
…but…
You still need to navigate:
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Permits
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Site constraints
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Utilities
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Local implementation details
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TUCSON'S CUSTOM BUILD EXPERTS
Build your dream (spaces) with us
No shortcusts or patchwork jobs
We take the time to do things right. Every project is approached with care, precision, and attention to detail. The result is a complete build that performs better and lasts longer.
Streamlined, Professional Process
Our process is structured from start to finish. Each phase is planned, managed, and executed with precision. This keeps your project organized, efficient, and moving forward without unnecessary delays.
Designed for Long-Term Value
We build with durability and performance in mind. Every decision supports long-term functionality and quality. The result is a space that holds its value and stands the test of time.
Clean Communication from Start to Finish
You’re kept informed throughout the entire project. We provide consistent updates and clear expectations. No confusion, no guesswork—just straightforward communication at every stage.
We think like investors
We don’t just think like builders—we think like investors. Every project is designed with purpose, from layout efficiency and cost control to rental potential and resale value.
We’re not just building homes—we’re building assets that are meant to last and generate value.
8+
Years of Experience
100+
Homes / Multi-Family Units Built
