The Ranch Mine

The Ranch Mine

About

We are a national award-winning architecture firm based in Arizona, creating distinctive homes, event venues and boutique resorts around the world. With over 250 projects completed across 4 continents and features in Architectural Digest, Dwell, and The Wall Street Journal, we specialize in designs that connect you with nature and each other. Only architecture firm to be a 3-time HGTV Designer of the Year winner.

Meet the team

Cavin Costello
Cavin Costello
Founder | Principal Architect
Claire Costello
Claire Costello
Founder | CEO
Geoff Sosebee
Geoff Sosebee
Director of Design Operations
Rachel Connor Karle
Rachel Connor Karle
Project Architect
Nicole Mehaffey
Nicole Mehaffey
Project Architect
Benjamin Johnson
Benjamin Johnson
Visualization Specialist

Awards and recognition

2026
Phoenix Home & Garden
Home of the Year
2025
HGTV
Designer of the Year – People’s Pick Winner
2025
Modern Luxury Interiors
Home of the Year - Design 9 Awards
2025
Modern Luxury Interiors
Best Contemporary Residence - Design 9 Awards

The Ranch Mine
The Ranch Mine
The Ranch Mine

Testimonials

Working with Cavin and The Ranch Mine team to design and build our home was an absolute dream. From the very beginning, they took the time to truly listen to everything we wanted, and then they went above and beyond to exceed our expectations at every step. Their vision, creativity, and attention to detail brought our dreams and ideas to life in ways we couldn’t have imagined. They worked tirelessly, not stopping until every detail was perfect.

Cavin was an incredible advocate for us throughout the entire process, ensuring that our interests were protected and that the final result reflected our hopes and desires. We couldn’t be happier with our DREAM home, and we’re so grateful to have partnered with such a talented, thoughtful, and dedicated team. If you’re considering working with The Ranch Mine, just do it... You’ll be in the best hands!

Homeowner

My husband & I purchased our dream lot in Paradise Valley, AZ October, 2018. A private flag lot, saturated with mature trees in the middle of the Arizona Desert. We hired a draftsman to tweak an existing floor plan that we had thought would become our dream home. Shortly after working with the draftsman, it was evident that we needed to explore another route. The plan did not fit the challenging shaped lot, and our vision was not being achieved. We had admired The Ranch Mine’s architecture for years via social media, but never thought that we would get the opportunity to have them design for us. What started with a questionnaire about our lifestyle-ended with a home that blew away our expectations. Each step of the design process was met with professionalism, prompt action, but most of all open ears. Cavin & Claire have the unique ability to truly understand family lifestyle, deliver on the desirables, add elements to enhance everyday life, and deliver a finished product with WOW factor. After 3 months living in ‘The Hive’, we see the thoughtfulness of scale, daylight, and the materials used. We could not be happier! We look forward to building another home with this DREAM TEAM down the road.

Homeowner

Working with The Ranch Mine has been a fantastic experience. Cavin and his team took our basic idea and created a work of art. They are organized, professional and established clear timelines for each phase of the project. The pricing is clear and there are no surprises. The team is quick to respond to any questions and they are easy to work with. Our goal was to build a luxury rental in Flagstaff, AZ. The Ranch Mine has such a following, that people reserve the home just so they can stay in a “Ranch Mine home”. Because of the architecture, this home will be featured in Jan/Feb 2023 Luxe Magazine. The owner of The Ranch Mine, Cavin, is a visionary and a master of his craft.

Noir Peaks

We loved working with The Ranch Mine! They met with us, heard our vision and designed an incredible space beyond our imagination. Over the two years of design + build, they had excellent communication both with us and our construction team. The final product is stunning - Thank you The Ranch Mine, team!

Client

Cavin, Claire, Geoff and the entire Ranch Mine team are incredible to work with. Creative, patient, resourceful and prompt across every stage of the home design and build journey. We had more fun than we should've and would trust this firm again and again!

Homeowner

I've been a fan of Cavin and The Ranch Mine for quite some time... and then three kids later as the needs in our home changed my wife and I knew we needed a professional for our remodel, one that would not only help create sensible solutions, but that also worked for our project aesthetically, and specifically for our family. I recommend them highly.

Client

Having just completed a house designed by The Ranch Mine, I can confidently say that working with Cavin & Claire was a wonderful experience that far exceeded my expectations. Not only did I get a beautiful home but the design experience was organic and fun. The Ranch Mine is a highly professional, intuitive, and creative team that I highly recommend. In the design phase, I was blown away by their ability to listen and implement the needs for my home. All done in harmony with a gorgeous, southwest aesthetic. Seeing this combined in a masterful and artful way was truly exciting. Building a home is a huge undertaking and, if I had had a rewind button in my hand, I wouldn’t change a single thing!

Homeowner

We’ve had a fantastic experience working with The Ranch Mine. Before selecting Cavin and Claire, we met with five architecture and design-build firms. What impressed us most about Cavin and Claire during these conversations was their willingness to explore any idea and to discuss the pros and cons of any possible direction. Before sketching a single architectural concept, Cavin and Claire committed considerable time to learn about the regular daily routine and the aspirational, dream-like daily routine of every person (and dog) to live in our new home. After that, the inspired concepts The Ranch Mine created not only surprised and delighted us, but proved their understanding of us. From their earliest design concepts, we were confident that our home would be refreshingly original and thoroughly tailored to our lives. Cavin and Claire’s enthusiasm, creativity, innovation, and patience set and maintained the tone for the entire project. Now that we have lived in our new home for several months, I can attest that Cavin and Claire’s process works. Our house feels terrific. The architecture in which we live successfully transforms average days into dream-like days.

Homeowner

This husband and wife architecture and design team created a stunning remodel of a mundane 1970’s hacienda style house, transforming it into a modern home with mid-century flair to fit its spectacular location. Patient and professional, Cavin and Claire led us through several beautiful redesign iterations until we captured the form, function and flow that make the most of the site’s sweeping views and steep terrain. A sophisticated palette of vein-cut natural stone, laser-cut metal work, exposed steel beams, smooth stucco, broad expanses of glass and a hanging garden created with integrated deck planters perfectly marry the lot’s disparate landscape. On the back side, the home meets the stark and soaring rise of Camelback Mountain’s head; in the front, it hovers high above the green canopy of Phoenix’s Arcadia neighborhood with the Valley of the Sun’s lights and downtown glimmering below. Interior details including concrete, terrazzo, Bisazza glass tile, quartz counters and marble baths capture both modern and timeless elegance. Simple but refined fixtures unobtrusively add dimension to the interior volumes. A complex remodel that left intact much of the existing home’s framework but reworked and extended nearly every room in the house required remarkable attention to detail that the Ranch Mine handled diligently and smoothly with our builder. Plans were accurate down to minute details, ensuring a seamless building process. The follow-through and cooperation with our builder was exceptional. The Ranch Mine team worked equally well with our pool and landscape designers to ensure a composition that is inspired by the home’s style and promotes the best in indoor-outdoor living. If we ever undertake another complex remodel or new build, the Ranch Mine will continue to be our first choice in modern home design.

Homeowner

My husband and I did a complete re-build design with The Ranch Mine. We fell in love with how their designs bring in the old with the new and pay homage to the community and surroundings of the property. There are many meaningful architectural elements that tie in throughout their home design. We feel like our home tells a story and has meaning beyond a normal design. So much detail and thought is put into textures, sunlight, placement, sizing and the angles of every part of the home. The entire Ranch Mine team made our home building experience easy, enjoyable and fun. We hope to be able to do another project with them in the future.

Homeowner

Working with Cavin and Claire was a dream. They made a large and scary process with a challenging site very enjoyable and easy. They spent time at the beginning getting to know us as a family and how we use and move through our home on the weekdays and weekends. Then all design was built around our lifestyle, not what they wanted in their portfolio. Being included in that process resulted in both a functional and beautiful space. Nothing but 5 stars across the board!

Homeowner

We had a 1970's Ranch house which was dark with low ceilings and a small kitchen. Our intention was to add a master bedroom and new kitchen and brighten up the space. We had several ideas and suggestions about how to renovate the space but could not have ever imagined the final outcome. We were following the The Ranch Mine on social media for a while and realized they have the creative vision to transform old homes into modern, beautiful and functional spaces. Cavin's vision for the extension and renovation was exceptional, our intention was to capture a view of the mountains towards the east side of our property but Cavin showed us a view to our North we never thought we had. He not only captured a stunning view but oriented the addition in such a way that we avoid the harsh Arizona sun. We could not be happier with the result, Cavin and Claire are great to work with, professional and approachable. They took the time to find out our requirements and worked within our budget to help build our new home. Looking forward to working with them again in the future.

Homeowner

We just moved into our home three months ago and couldn’t be happier. We had been following The Ranch Mine’s work within the Valley for years and knew they were the only architect that we wanted to work with. From day one of contacting them, they were professional, creative and most importantly acutely aware of how the home design needed to fit not only into our lifestyle but our budget as well. The finished product is stunning and is the first home we’ve opened up to all friends and family because we’re so proud to call it home!! The Ranch Mine made our dreams come true! Truly.

Homeowner

The Ranch Mine, Claire, and Cavin, has changed our lives. They are brilliant in their designs, generous in their time, professional in their approach, and amazingly easy to work with. We had been following some of their earlier homes and fell in love with their approach to building homes that fit the space, connected to the surroundings and were homes you wanted to live in. We talked with them about the area of town we wanted to be in, they helped us find a lot, explored our wish list of features we thought we wanted and gave us direction when we were at a loss. Our home is almost completed and the attention to detail and help Claire and Cavin are still providing is so appreciated. This is our first new build house and will be the home we retire to. We are so looking forward to moving in and living in this fantastic home. We are grateful to Claire and Cavin for their help and friendship in realizing our dreams. They made this process not only easy but fun.

Homeowner

Cavin and Claire are exceptional. From Start to Finish, they stayed on top of the details, making sure our expectations were exceeded. Even though we were a smaller project for them, they poured an abundance of attention into our project and were always there to help see it through to the finish. We have received nothing but great feedback from everyone about our project. We were even selected for the Modern Phoenix Home Tour after completing our project! We look forward to working with them again in the future.

Homeowner

We hired The Ranch Mine to design an addition onto our 1950 single story ranch home. We were looking to expand and remodel our kitchen, and add a dining room and master suite. They were excellent to work with in terms of understanding what we wanted and understanding our style. The addition The Ranch Mine designed made excellent use of the space and flows perfectly, and the transition from the old part of the house to the new is seamless. They also included a wonderful screened in porch off the dining room which is really another living space that we get so much use out of. They were great to work with, very responsive and efficient, and we loved their work. Our day to day lives have been greatly enhanced because of the great job they did with our house.

Homeowner

I worked with The Ranch Mine for my remodel of a recently purchased home in Scottsdale, AZ. It was a complete overhaul of the house and my design tastes are very modern and minimal. I am definitely not a traditionalist when it comes to my home design preferences. I saw on their website (TheRanchMine.com) that The Ranch Mine could produce beautiful designs that were more traditional, but I was curious if they could meet my preferences and budget. After meeting with them, I knew they were going to be exactly what I was looking for. They were very professional and worked with me from start to finish on my design concept. They did a great job of “walking the fine line” of leading the project, but always putting my needs and choices first. They were very conscientious of my budget and everything they did was to ensure that it was met, from design through final construction. I can not say enough positive things about this company. The care and professionalism they took for me before, during, and after construction has been awesome. They “nailed” my vision and created my dream home. All of this was done at an incredible value with great service! Thank you for all of your great work guys!

Homeowner

We worked with Cavin and Claire from The Ranch Mine for our full house renovation master plans and just completed the first phase, the kitchen remodel. We are taking a traditional southwestern ranch home and making it more contemporary which they really excel in. They were great to work with. They brought up ideas we would never have thought of and they really listened to what we wanted. They nailed our kitchen materials and finishes on the first try. We are looking forward to continue to work with them on the rest of our place.

Homeowner