Forward-thinking design.
Hand-crafted feel.

At DTJ, we’re all about the big idea – no matter where it comes from. We view all our clients as creative collaborators. It’s how we’ve been able to create remarkable spaces and destinations around the globe from residential and resort environments to themed attractions and public places.

We provide architecture, planning and landscape architecture services using an integrated design approach. This means you’ll find us to be both artistic designers and trusted advisors. Our creative solutions engage the contextual and environmental sensitivities of a site, while the thoughtful integration of architecture enhances the experience of a place.

Unlike other large design firms, we specialize in a hands-on, customized approach that pushes the boundaries of conventional design, while bringing the best version of our client’s vision to life. Together, we craft spaces and destinations that resonate with the marketplace, excite the imagination and stir the soul.




We are known for contextual and culturally relevant design, creativity, and attention to detail.  DTJ’s architecture complements the environment with artful solutions and thoughtfully integrated indoor-outdoor spaces. We create luxurious environments, crafted details, and memorable experiences. DTJ provides distinctive design for a variety of hospitality, residential, commercial, clubhouses, and amenity buildings.


From large-scale communities to intimate enclaves and mixed-use environments, DTJ’s site-sensitive planning adds value to real estate. As the framework for the community, we recognize that enduring projects integrate the built environment with the unforgettable characteristics of the land. DTJ blends artistry and function to realize added value in creating distinct neighborhoods and community destinations with meaningful open space and amenity areas.


DTJ’s projects display a strategic enrichment of the outdoor environment, which enhances competitiveness.  Our landscape architecture infuses a remarkable quality and identity through creative design and artistry with topography, structures, materials, and planting palettes. From hotel and club settings, to residential neighborhoods, the public realm, and community amenities; DTJ’s strategic landscape design results in notable projects.


Our History
DTJ Designs - 1967 - 1977
1967 - 1977
  • Downing-Leach founded in Boulder, Colorado by Bruce Downing and Jim Leach
  • Initial focus on custom homes
  • Pioneering PUDs with two of Colorado’s first, Wonderland Hill and Appleridge Park, garnering Best New Subdivsion in Boulder County and Sensible Growth & Planning awards
  • Trail blazing in solar design in partnership with the Solar Energy Research Institute and National Association of Home Builders
  • Multiple awards received for leading edge design and sensible growth
DTJ Designs - 1978 - 1987
1978 - 1987
  • Celebrating new and old — innovative new community design and adaptive re-use of historic properties and preservation of historic districts
  • Implementing solar design in homes and daylighting in office buildings
  • Innovating in Boulder — Canyon Center (First mixed-use project), Spruce Street Center (First Parking Garage), Bridgewalk (First Woonerf Street)
  • Tackling Affordable Housing in Boulder with varied approaches and multiple projects
DTJ Designs - 1988 - 1997
1988 - 1997
  • Downing-Leach transitions to Downing, Thorpe, and James, (DTJ) acknowledging Tom Thorpe and Steve James as Founding Principals of the evolving company
  • Large Scale Master Planning focus includes University of Colorado Research Park, Interlocken Advanced Technology Park, and many Residential Communities
  • Landscape Architecture joins Architecture and Planning as a key design discipline; DTJ’s integrated design approach gains momentum
  • Building a diverse portfolio with Corporate Express and Up with People Corporate Headquarters, and Rock Bottom and Gordon Biersch Restaurants
DTJ Designs - 1998 - 2007
1998 - 2007
  • Award winning resort communities in Desert Mountain, La Quinta, Park City, Telluride, and Las Vegas
  • Colorado Kudos with AIA Colorado Firm of the Year
  • Mixed-use projects gain traction in DTJ’s practice; One Boulder Plaza becomes the catalyst for a new wave of revitalization in downtown Boulder
  • Anthem Colorado and Centerra set high standards as the next generation of Master Planned Communities
  • Xilinx Corporate Campus is recognized for outstanding design and Land Stewardship
DTJ Designs - 2008 - 2017
2008 - 2017
  • Transitions to DTJ DESIGN, recognizing the next generation of expanded leadership
  • International expansion with projects on all continents except Antarctica
  • DTJ opens an office in Atlanta, bringing new focus to the Southeastern US and the Caribbean
  • Themed Entertainment destinations become a huge part of DTJ’s practice. Dream Big
  • Bruce Downing and Jim Leach are inducted into the NAHB  BALA Hall of Fame
DTJ Designs - 2018 - current
2018 - current
  • Awarded the renovation of Centennial Olympic Park in Atlanta
  • Steve James receives the prestigious MAME Legend Award
  • Addressing the affordability gap with site and design strategies for urban rowhomes, small lot single-family, and micro housing
  • Looking forward to Big Things to come
DTJ is very creative, innovative and provides high quality design work. Their employees are talented individuals dedicated to customer service.”
Kim Perry, VP of Community Design and Neighborhood Development — McWhinney