Building a better future for the planet and its people

Experts in Building Sustainably

From LEED, Net Zero or even fully regenerative buildings – we stay up to date on the latest sustainable building techniques and certifications. We can assist with all levels of LEED certification, Net Zero Energy or Carbon pursuits, Living Building Challenge aspirations, Fitwel, and WELL Building compliance.

Our in-house MEP Department experts provide design-assist services and help to coordinate efficient systems and our expert Precon team can provide embodied carbon analyses.

2021 ENR Rankings

  • #14 on the Top Green National Contractors List
  • #5 in the Commercial Office Sector

Ever-Evolving Sustainability Experience

  • 1st Living Building Challenge building in Southern California and Greenest Municipal Building in the World
  • Well Building Certification Experience
  • Fitwel Certification Experience
  • Embodied Carbon Experience
  • Mass Timber / Cross Laminated Timber Experience
  • Microgrid Experience
  • Geothermal Experience
  • Green Roof Experience

Decades of LEED Experience

  • 20 LEED Platinum Certified projects
  • 88 LEED Certified projects total
  • 28 million square feet of LEED certified spaces
  • 81% of all LEED projects have achieved at least Gold Level Certification

Featured Project: City of Santa Monica City Services Building

The Living Building Challenge is the most rigorous sustainable building certification attainable and is administered by the International Living Future Institute. Hathaway Dinwiddie built the new Santa Monica City Services building under this framework, and today it is the greenest municipal building in the world.

The project went beyond LEED, requiring beginning-to-end operational compliance with strict, regenerative triple net-zero standards. One of the many ways the City Services Building is unique is how it does not import or export any water, energy, or waste–thus making it a “Living Building”.

Sustainable elements include:

  • First composting foam-flush toilets in Southern California
  • Edible landscapes
  • Chemical-free building materials
  • Treated rainwater on site for drinking–the first in California
  • Less than 5% of waste is sent to a landfill (five composters in basement)
  • On-site power generation system that avoids energy bills altogether
  • Radiant slabs for heating and cooling