About Us
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  • Structural engineering and calculations
  • Architectural design
  • Construction management
  • General contracting
  • Planning expedition


  • New construction
  • Additions (horizontal & vertical)
  • Remodeling
  • Structural upgrades
  • Energy Performance Upgrades


We are passionate about making buildings that sing – buildings that bring lasting joy and beauty into our clients’ lives.  We optimize our clients’ fundamental human needs for shelter and joy through the practice of good technical design. Our focus is on structural intelligence and low-carbon footprint.  Our dream is for you to have an enduring, timeless final product that enhances the natural beauty of your local environment.

Crafted Earth is a multi-faceted design firm, combining architecture, structural engineering, and construction. We endeavor to design and produce high performance spaces and structures brimming with natural beauty. We are committed to providing our clients with exceptional, data-driven service throughout all phases of design and construction. We are able to offer a complete array of design services, including: Whole building design, remodel assistance, detailed structural and energy analyses, design drawings and calculations, permit assistance and planning, construction administration, bidding and procurement, and general contracting.


Eric Spletzer, PE

Eric is a licensed engineer and general contractor who first found his love of buildings as a carpenter’s apprentice 25 years ago.  He has masters degrees in both structural engineering and architecture from UC Berkeley, and an undergraduate degree in philosophy and computer science from Dartmouth College.  You can usually find him on site, behind multiple monitors, or playing with his two amazing daughters.

Monica Ortiz

Monica majored in architecture at Francisco Marroquín University. Her training was not only as an architect but also as a developer. She started out with home remodels, some as big as 16,000 sqft.; Building townhomes as rental properties and creating a development proposal for a gated community in Nicaragua. She also participated in the design of hospitals when she did her internship in Dallas. After the birth of her son, she stayed at home for a few years, but she could not stay away from her creative work for long. She has successfully worked as the FF&E Manager & Fohlio Pro for a successful Architectural Design Company in NY, participating in hundreds of projects. She joined Crafted Earth in January 2022 as the Project Coordinator.  

Roberto Valentino

Fully qualified Architectural Engineer, BIM Enthusiast, Autodesk Revit ACP, He is a supporter of all aspects of digital construction and information management. He got technology started using CAD in civil engineering and architecture “way back when” and made his move to BIM and Revit in 2008. His professional career of over 15 years, includes experience in design, production, and BIM management across both civil engineering and architecture, resulting in an integrated approach to building design.

Alex Yarovoy, ASSOC, AIA

Alex is a vocateur architectural designer and project manager with a master’s degree in architecture from UC Berkeley, a BFA in Furniture Design & Art History from Northern Michigan University, and professional experience as a cabinetmaker and blacksmith.  His lifelong love of elegant design and high craftsmanship has led to his current partnership with Crafted Earth.  He’s most comfortable on-site working to get the details just right but also loves playing the guitar, studying new disciplines, and hiking with his wife and two dogs. 

Maxim Dediukhin 

Max loves to design houses for people around the world! 
He fell in love with creating interesting spaces during his study for a Master’s degree in a cold and remote place. ”Architecture is a constantly changing art that goes along with technologies and the latest building science”.  
Starting with hand sketches and taking liminal thoughts of imaginary buildings I’m running it through BIM modeling, 3D visualization, and collaborative software. This allows me and the people I’m working with build modern and comfortable homes, based on specific site conditions, unique lifestyles of clients, and local material palettes and end up with Quīnta essentia of the place and human mentality. 

Justin Botros

Justin is an experienced project manager and architectural designer who has worked on many aspects of the architecture and construction industry. He has worked with architects such as BIG and Michelle Kaufmann. His range of project types includes custom homes in areas such as Los Altos Hills and as far away as the Caribbean. In addition to design and construction, Justin enjoys art and fabrication and has worked with artists such as Andy Goldsworthy & Damien Hirst on private installations around the world. In his spare time, Justin volunteers with the Sierra Club, improving the backcountry huts network and doing environmental work with the Surfrider Foundation.

Jose Zacarias

Jose is the head of our construction crew who has over 13 years of carpentry experience in Marin county.

Alexis Zacarias

Alexis is also one of our lead carpenters, he has been working for Crafted Earth for over 8 years and his favorite part of the job is the details. In his free time, Alexis enjoys playing football with his friends.

Katya Najarro

Katya is a freelancer looking to learn new procedures to be more organized and also looking for new applications that facilitate the work of others. Katya has a Bachelor’s degree in Business Administration and then graduated with her Master’s degree in strategic management of family businesses in 2021. She has seven years of work experience and learned to work hard and run the extra mile when needed. Katya knows remote work and loves it, allowing her to enjoy her family and work. When Katya is not working, she enjoys playing volleyball or drinking a cup of coffee in the company of her husband, son, and friends.