Building certifications

The short version

Building certifications are third-party verified ratings that signal a building's performance against established standards — for energy, environmental impact, occupant health, or some combination. The four most consequential certifications in US commercial real estate are LEED (design-based green building), ENERGY STAR (actual energy performance), BREEAM (global green building), and WELL (occupant health and wellness). Each measures something different and serves different stakeholder needs.

LEED — design-based, comprehensive scope

LEED (Leadership in Energy and Environmental Design), administered by the US Green Building Council, is the dominant US green building certification. LEED awards points across categories — energy and atmosphere, sustainable sites, water efficiency, materials and resources, indoor environmental quality, and innovation — with total points determining certification level: Certified (40-49 points), Silver (50-59), Gold (60-79), or Platinum (80+).

LEED has multiple rating systems for different project types: BD+C (Building Design and Construction) for new construction, O+M (Operations and Maintenance) for existing buildings, ID+C (Interior Design and Construction) for commercial interiors, and ND (Neighborhood Development) for districts. LEED is design-based, meaning certification reflects the building's specifications and projected performance rather than actual measured operations. This is both LEED's strength (predictability) and its frequent criticism (a LEED-certified building can underperform an uncertified one in actual operation).

ENERGY STAR — performance-based, narrow scope

ENERGY STAR for buildings, administered by the US EPA, takes the opposite approach: it certifies based on actual measured energy performance. To earn ENERGY STAR certification, a building must achieve an ENERGY STAR score of 75 or higher on a 1-100 scale — meaning it performs in the top 25% of similar buildings nationally for actual energy use, normalized for size, climate zone, occupancy, and building type.

ENERGY STAR is narrower than LEED — it only addresses energy — but stricter in that it requires verified ongoing operational performance. ENERGY STAR certification must be renewed annually based on the previous 12 months of operational data. Many commercial owners pursue both: LEED for new construction and significant retrofits (one-time achievement); ENERGY STAR for ongoing operations (annual renewal). Combined with the federal 179D commercial buildings tax deduction (which can require ENERGY STAR-comparable performance, and which sunsets for projects with BOC after June 30, 2026 under the OBBBA), this is one of the more common pairings in US commercial real estate.

BREEAM and WELL — different angles on building quality

BREEAM USA is the US adaptation of the UK-originated Building Research Establishment Environmental Assessment Method, the world's longest-running green building certification. BREEAM is more common globally than in the US, where LEED dominates, but BREEAM's stronger international footprint matters for multinational corporate portfolios pursuing consistent global standards.

WELL Building Standard, administered by the International WELL Building Institute, focuses on human health and wellness rather than environmental impact. WELL evaluates buildings across air, water, nourishment, light, movement, thermal comfort, sound, materials, mind, and community. WELL is complementary to LEED — many high-performance buildings pursue both, with LEED addressing environmental impact and WELL addressing occupant experience. WELL has grown rapidly since 2014 as corporate tenants and employee wellness programs have made the workplace environment a competitive differentiator.

The energy procurement connection

Most certifications credit renewable energy procurement and on-site generation. LEED v4.1 awards up to 16 combined points across renewable energy production (on-site generation) and renewable energy procurement (PPAs, VPPAs, green tariffs, RECs). The credit hierarchy values long-term direct procurement (PPAs) higher than short-term unbundled RECs, reflecting additionality concerns. ENERGY STAR doesn't directly credit renewables but indirectly benefits buildings using on-site renewable generation that reduces metered consumption. BREEAM and WELL similarly credit renewable procurement with detailed scoring rules.

For real estate owners and corporate tenants, this means renewable energy procurement strategy interacts directly with certification strategy. A 20-year solar PPA earns more LEED credit than five years of unbundled RECs, even if both deliver the same total renewable energy volume. Building owners increasingly time PPA execution to coincide with certification submission, and many specify renewable procurement as a base building amenity in leases targeting Fortune 500 tenants.