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The Future of Housing is Here: The policy has passed. The designs are ready. The movement continues.


We've Been Busy...Here's What's New


Dear UIP Community,


It’s been a little while since you’ve heard from us! We’ve had our heads down expanding our plan library, developing new designs, and responding to exciting changes in local zoning codes. At the same time, neighboring jurisdictions have been building their own pre-approved plan libraries, and we’re proud to support those efforts as more communities embrace small-scale housing. Scroll down for all the latest updates!

Missing Middle Housing In Full Swing

A new era of housing has arrived in Tucson, as of January 1, 2026, homeowners across Tucson can now build duplexes, triplexes, fourplexes, townhomes, and cottage courts on residential lots. This landmark zoning update creates new opportunities for homeowners, families, and small-scale builders and developers to expand housing choices, build wealth, and create more flexible living arrangements throughout Tucson. (Middle Housing Background)

Existing Urban Infill Plan Library Code Update

All existing UIP plans have been updated to comply with the 2024 International Residential Code (IRC). We've also incorporated thoughtful refinements based on three years of feedback from homeowners, builders, and contractors to make the plans even better. Our entire plan library is now up to date and ready to serve you for the next three years.

New Products

We're excited to announce that three new designs are just days away from final approval and will soon be added to the UIP Plan Library. New options include a two-story stacked duplex, a single-story side-by-side duplex, and, by popular demand, a detached two-car garage. We can't wait to share them with you!

Keep your eyes peeled for the upcoming Middle Housing Design Competition! We're excited to be participating and look forward to sharing more details as they become available.

New Jurisdictions

We continue to offer pre-approved plans in the City of Tucson and Pima County and are proud to announce that UIP has been added to the Town of Oro Valley's Community Model Homes: Model Plan Library. We're also working through the pre-approval process to bring our plans to the City of Mesa, expanding access to high-quality, permit-ready designs across Arizona.

Save the Date: ADU-Palooza!

Mark your calendar! On September 11, from 1:00 to 4:00 p.m., we'll be hosting an educational event at TAR focused on building ADUs and Missing Middle Housing. We'll cover the development process from start to finish, including zoning, financing, site design, permitting, and construction. More details coming soon!

Calling all Registrants!

If you are a registered design professional and would like us to host your model concepts within our network, please get in touch with our team!
As you can see, it's been a busy year so far, and we're just getting started!

Thank you for your continued support, your referrals, your feedback, and your belief in our mission. Every new plan, partnership, and policy brings us one step closer to a more attainable, resilient, and resident-driven housing future. We're grateful to have you as part of the Urban Infill community and look forward to helping transform ideas into homes, neighbors into communities, and dreams into reality!
Calls to Action:
  • Make yourself aware of the public resources available to those in need of housing.
    City of Tucson
    Pima County
  • Rethink what it means to be part of a community - what can you do to help? (Please note: this is not a local resource, but this link offers some actionable steps to helping people experiencing homelessness - the housing crisis affects us all, and we can take small steps that make a big difference)

Journal questions:
  1. What would having a flexible space in your backyard make possible that isn't possible today?
  2. What dreams have you put on hold because you didn't have enough space or financial flexibility?
  3. If you could create a place for aging parents, adult children, guests, or caregivers, how would that change your family's future?
  4. If you could design a space that perfectly supported the life you want, what would be inside it?
  5. Imagine it's five years from today. Your property has become one of the best decisions you ever made. What happened, and how did it change your life?
  6. What is the intimidating factor when thinking about how to build a casita in your back yard? Imagine that thing is not so bad, what are the first 2 steps you would need to take?

    Feel free to share your thoughts with us! info@infillproject.com


 
 
 
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