About Us

Our Name

We are often asked how we came up with our company name, The Ranch Mine. Before we formed our company back in 2010, we spent 7 months traveling around Arizona, exploring the rich history of our state in search of what was authentically Arizonan. During these trips, a common thread started to emerge: the pioneer spirit. Everywhere we went we heard stories and saw manifestations of the driven, impassioned people in search of a richer life. This spirit is still alive and well today. We chose our name to honor those that have come before us, the humble ranchers and miners, who have paved the way for our opportunities for prosperity today, and to serve as inspiration to design spaces that afford us the opportunity to imagine what’s beyond what we see in the present so we can strive for new experiences.

Our Story

In 2009, Cavin Costello received his Masters degree in Architecture and made the drive to Phoenix, Arizona sight unseen, inspired by the complexities and opportunities to be had in the rapidly urbanizing southwest. He had not yet been a full day in Phoenix when he met Claire, a Phoenix native looking to make the most of her recent move back home. The two quickly bonded over their ideals of the built environment, how to improve upon it and its ability to influence. Not settling for a hard hit economy to dictate their next move, the duo decided to act. So, they bought a fixer upper and experienced first hand the trials and tribulations of a major renovation.

The two continued paving their own path developing the First Phoenix Green Construction Code project, designing for visionary real estate developers, and creating inspired homes for unique homeowners. Cavin and Claire have continued to push the envelope in designing for the pioneer spirit which has won them a 2015 National American Institute of Architects contest that named them the “Future of Architecture”, landed them features on the NBC Today Show and with HGTV, and had their worked published in numerous publications such as the book ‘150 Best of the Best House Ideas’, Architectural Record, Dwell Magazine, Atomic Ranch Magazine, Luxe Magazine, and popular websites such as Design Milk, Arch Daily, and Dezeen to name a few.

Our Team

Cavin Costello, Principal 

Cavin Costello is the son of a civil engineer who endeavored to build his own house in rural Connecticut. It is safe to say that this exposure to building systems mixed with a “go get ’em” attitude laid the foundation for Cavin’s bright future. Cavin pursued his childhood passion at Northeastern University in Boston from which he received a Bachelor of Science in Architecture and a Master of Architecture degree. His enthusiasm for adventure lead him to Phoenix, Arizona where he is a Registered Architect and has become a local leader in the modern architecture community. To date, Cavin has designed over 100 projects in his eight years in the Valley, has won national and local awards, including “The Future of Architecture” by the American Institute of Architects and Houzz, and has been honored as a featured speaker at engagements at Arizona State University, Northeastern University, PHX Architecture Forum, Phoenix Urban Design Week, Reinvent Phoenix, AIGA, Arizona Historic Preservation Conference and Modern Phoenix Week.

Claire Costello, Chief Executive

Claire Costello is a native Phoenician who received unique exposure to rambling ranches, mid-century modern and desert architecture. Claire was young when she was asked to pick up a shovel and do some dirty work at her aunt and uncles in Tucson. This “dirty work” was digging dirt to build the first rammed earth house Claire had ever known of. Leaving the desert behind, Claire ventured to the University of Colorado at Boulder where she received concurrent Bachelor of Science degrees in English and Communication. Her time away from Arizona led Claire to travel the world, fueling a desire to make real change and igniting a belief in the power of action. Upon returning to her hometown, Claire sought to make a familiar place new, exciting and her own. Emboldened with an entrepreneurial spirit Claire is committed to reclaiming her hometown of Phoenix one home at a time. Today, Claire embraces a hands-on approach to design and development and works toward shaping a more vibrant community.

National Awards & Honors

Top 10 US Houses of 2017, Dezeen – 2017

Top 20 Homes of 2017, Dwell Magazine – 2017

2017 Building of the Year Finalist (United States), American-Architects – 2017

HGTV Faces of Design Judge, HGTV – 2017

The Future of Architecture: Innovation, American Institute of Architects and Houzz – 2015

HGTV Designer of the Week, HGTV – 2015

Green Remodel of the Year: National Award-Winner, National Association of Home Builders – 2012

Best Homes Across the Country under $250,000, NBC Today Show – 2012

Local Awards & Honors

The Best Residential Architects in Phoenix: #1, Phoenix Architects – 2018

Best of Houzz: Design, Houzz – 2013, 2014, 2015, 2016, 2017, 2018

Big Brain Award Finalist: Design, Phoenix New Times – 2015

35 top Entrepreneurs under 35 , The Arizona Republic – 2013

Best Emerging Creative Duo, Phoenix New Times – 2013

Top 100 Creatives, Phoenix New Times – 2012

Public Speaking Engagements

PHX Architecture Forum – 2017

Arizona Historic Preservation Conference – 2017

American Institute of Architects Arizona Associate Conference – 2017

Arizona Historic Preservation Conference – 2016

Design Within Reach, Design Days – 2016 

Arizona Historic Preservation Conference – 2015

Phoenix Urban Design Week  – 2015

Modern Phoenix Week  – 2014

AIGA PechaKucha: Design for Good  – 2014

Arizona Historic Preservation Conference – 2014

Reinvent Phoenix – 2014

Modern Phoenix Week  – 2013

Arizona Historic Preservation Conference – 2013

TEDx Phoenix – 2013

Arizona State University School of Urban Planning – 2012

Retrofitting Sprawl Symposium – 2012

Northeastern University School of Architecture – 2012