About Us
An Exuberant Sense of What's Possible.

Jon and Amanda at an ADU build in Barrio Viejo

Jon brings expertise, tools, and site supervision to each project

Amanda Gattenby and Jon Goff in Merced at a modular installation

Jon and Amanda at an ADU build in Barrio Viejo
Unstoppable Construction, LLC is an Arizona licensed general contractor (ROC324504) and a passionate proponent of affordable and infill housing in Tucson. We specialize in building casitas and ADUs. We believe the power of building small can have a big impact on families in our community.
Why homeowners and designers choose Unstoppable
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Deep experience in central Tucson: We’ve built ADUs across the neighborhoods that define this awesome city, including historic neighborhoods like Sam Hughes and Barrio Viejo.
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Designed in collaboration: We regularly work with Tucson designers, integrating good design with constructability from the beginning of a project. We collaborate with local architects and design studios including: Urban Infill Project, Cuadro Design, Studio Golden and others shaping our infill landscape. If you already have a designer, we integrate seamlessly. If you don’t, we can connect you with the right fit.
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Clarity from day one: Project management, pricing, and process that is explained simply and executed without surprises with careful management.
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Built to last and to live in: Our ADUs are not slapped together. We execute quality-built small homes designed to hold up over time and to live well.
Check us out in the March 2024 issue of Catalina Foothills Lifestyle magazine!
Amanda has over 20 years of experience in construction & development, and has helped produce over 1400 units of affordable housing, including groundbreaking projects using innovative construction methods. She's spoken at events, panels, and on podcasts and is considered a leading expert in the field of modular construction. She runs the contracts, accounting and is the primary client contact.
Jonathan leads all operations in the field. With over 40 years in construction coming up through the trades in Tucson, he has worked on both historic and leading edge projects in the community. He has a vast knowledge of building code, means and methods, and is a master executor. His industry expertise is leveraged for our clients on a daily basis. Jon is in charge of all things schedule, sequence, and inspection related.
You can read more about who we are (and who we aren't) at our blog post here.