Karl is an architect whose work is grounded in building science, environmental performance, and a close relationship between design and construction. His experience spans custom residential architecture, large-scale institutional projects, and high-performance buildings, including Passive House–certified work. With a background that bridges design-build practice, fabrication, and technical leadership, he brings a thoughtful, rigorous approach to creating durable, efficient, and well-crafted buildings.

Karl holds a Bachelor of Architecture from the University of Arizona and began his career at Rob Paulus Architects in Tucson, Arizona, working on modern residential projects that emphasized efficient use of space and careful budget considerations. While at Design Build Collaborative, also in Tucson, he gained hands-on experience in metal detailing, fabrication, and installation for high-end modern homes.

At Svigals + Partners in New Haven, Connecticut, Karl worked on large-scale projects including hospitals, schools—most notably the rebuilt Sandy Hook Elementary School—and mixed-use residential buildings, while also integrating art and sculpture into architectural design. During his many years at River Architects in Cold Spring, New York, he developed deep expertise in net-zero and energy-efficient architecture, including certified Passive House projects, and advanced his understanding of building science.

Among his many projects, Karl led the design and construction of Seminary Hill Cidery, the world’s first Passive House–certified cidery. The project received the Metropolis Planet Positive Regional Award and the PHIUS Passive Projects Design Competition Award.

Karl has presented at regional and national architecture conferences and is actively involved in the Passive House community. He currently serves as Vice President of PHIUS Alliance New York. He was drawn to The Art of Building for its commitment to the design-build model and values the way close engagement with construction informs and strengthens architectural work.

A graduate of Parsons School of Design, Natalka began her professional career in New York City, working in advertising and editorial as a stylist and art director. As a freelancer, she collaborated on a wide range of projects, during which time she developed a growing interest in health, healing, and the underlying qualities that give spaces and objects meaning beyond aesthetics. This curiosity led her to explore what makes environments feel resonant, life-affirming, and enduring.

She later shifted her focus, leaving Manhattan for Northern California, where she immersed herself in the natural world. During this time, she studied botany, native plants, sustainable gardening, permaculture, herbal medicine, and wildcrafting, while deepening her understanding of site-based design and the relationship between landscape and place.

In 2005, she returned to the East Coast and settled in the Hudson Valley. After spending time training in a Zen monastery, she transitioned into landscape design and gardening as a professional practice.

Natalka has worked with Art of Building since its early years, initially contributing through project staging and landscape detailing. She now collaborates closely with the architects to integrate the natural surroundings of each project with the architecture itself, extending the design beyond the building envelope. Her work emphasizes a thoughtful dialogue between interior and exterior spaces, with a focus on ecological sensitivity and long-term stewardship of the land ... always while planting as many trees as she can.