Commercial property teams planning WELL, Leadership in Energy and Environmental Design (LEED) or Building Research Establishment Environmental Assessment Method (BREEAM) projects should begin preparing for One WELL. By auditing existing scorecards, mapping overlapping certification requirements and sequencing documentation, teams can prepare before enrollment opens. Property teams can treat 2027 as an operational planning horizon rather than a rigid regulatory deadline, structuring their procurement, engineering testing and documentation rounds to align with upcoming platform releases.
What Does One WELL Mean for Commercial Property Portfolios?
The International WELL Building Institute (IWBI) is addressing operational friction with One WELL, a transformative update designed to harmonize WELL v2, specialized WELL Ratings and select strategies from WELL for Residential into a single, unified library.
For property developers, asset managers and engineering teams, this evolution streamlines multi-certification scorecards, simplifies documentation pathways and establishes a clear, future-proof planning horizon for sustainable commercial properties worldwide.
One WELL is the next major evolution of the WELL Building Standard, giving commercial real estate developers, property owners and engineering teams a more unified way to organize health, performance and certification strategies across portfolios.
How One WELL Consolidates Existing Programs
By establishing point-for-point interoperability across rating tiers and certifications, the update ensures that on-the-ground health strategies apply seamlessly to every program evaluation, without redundant documentation.
As sustainable commercial building becomes a standard market expectation, property teams need building standards that are easier to manage across complex portfolios. One WELL reorganizes the standard into modular, self-contained themes and strategies, allowing teams to establish clear health benchmarks across:
- Multi-tenant office buildings.
- Mixed-use retail complexes.
- Corporate campuses.
How Does One WELL Reduce Portfolio Administration?
Property developers can save time by consolidating overlapping requirements from older programs into clearer guidelines that support long-term asset value and tenant retention.
This consolidated structure removes repeated verification steps that previously slowed multi-property rollouts. Asset managers can apply standardized wellness protocols across regional portfolios while using more consistent and transparent scoring metrics.
| Feature/Dimension | WELL v2 | One WELL |
| Timeline and Enrollment | Fully active and established standard. Multi-year track record with quarterly addenda updates. | Published for public comment in early 2026. 2027 serves as an operational planning horizon for project teams. |
| Structure and Scope | Organized into 10 distinct concepts, feature parts and separate rating scorecards. | Consolidates WELL v2, ratings and residential strategies into a unified library of themes and strategies with point-for-point interoperability. |
| Cost and Administrative Overhead | Requires separate scorecards, separate document repositories and distinct review processes for ratings versus core certification. | Streamlines multi-program tracking and eliminates redundant documentation overhead by automatically counting rating points toward certification. |
| Credit and Scoring Changes | Preconditions are mandatory but earn zero points. Concept-specific caps restrict scorecard flexibility. | Preconditions now earn points toward overall certification. Concept-specific point caps are completely removed for greater design flexibility. |
| Transition and Legacy Pathway | Projects traditionally follow version-specific rules with standard recertification cycles every three years. | Features a three-year legacy pathway allowing project teams to maintain existing feature language for requirements that become stricter under One WELL. |
How Do Teams Streamline WELL Alongside LEED and BREEAM?
Commercial property teams pursuing WELL alongside LEED can leverage formalized IWBI and U.S. Green Building Council (USGBC) pathways to reduce duplicate documentation and coordinate certification reviews. Teams pursuing BREEAM should map overlapping requirements separately during early planning to avoid conflicting documentation or performance targets.
The IWBI and the U.S. Green Building Council (USGBC) offer joint certification pathways that help teams avoid duplicating documentation. Teams can use proof of award, in which one completed certification satisfies the matching criteria in the other system, or synchronous review, in which both submissions are reviewed in parallel.
Integrating health and environmental performance standards requires careful alignment of project boundaries and submission schedules. When deploying synchronous reviews, development teams submit parallel documentation within established verification windows, significantly reducing administrative overhead and review timelines.
Where Indoor Air Quality Planning Fits In
Managing indoor environmental quality hazards supports broader air quality planning for projects pursuing WELL, LEED or similar building performance frameworks. For example, teams should conduct rigorous commercial radon testing and implement active mitigation systems where needed. Because radon is a colorless and odorless gas, taking steps early to detect it helps maintain critical safety standards.
These overlaps also apply to materials selection, energy efficiency and water management. According to Greenscape, a sustainably focused landscape construction firm, “Exterior site planning is one place to start; stormwater-first landscape design, which decides where runoff goes before it reaches the ground, can help keep entries and loading areas clear of repeat drainage problems while building systems are still being specified.” By mapping shared credit requirements during schematic design, engineering teams can avoid conflicting specifications and ensure that ventilation and pollutant controls support multiple building standards simultaneously.
What Are the Rules for Harmonized Scoring and Preconditions?
Under One WELL, all mandatory preconditions now earn points toward overall certification, and concept-specific caps have been removed to provide greater flexibility in scorecard design. This change removes earlier scoring limits that could make it harder for buildings to focus heavily on specific performance areas, such as air and water quality.
All strategies across Ratings and Certification share identical point values, ensuring transparent scoring whether a project targets Bronze, Silver, Gold or Platinum recognition.
For engineering and design teams building new scorecards, this means every implemented wellness measure directly contributes to the final-tier threshold. Because preconditions now carry point values, project teams can earn credit for baseline indoor environmental measures early in the design phase without running into concept-specific caps, including:
- Advanced ventilation systems.
- Continuous air filtration.
- Comprehensive pollutant testing.
Removing concept caps encourages deeper investment in high-impact health interventions. Rather than distributing points across lower-priority features to avoid category maximums, development teams can focus more directly on core environmental engineering controls that deliver measurable improvements in indoor air and water purity.
How Should Teams Navigate the Three-Year Legacy Pathway?
Project teams navigating transitions between standard versions can use a three-year legacy pathway to maintain the existing feature language for requirements that become stricter under One WELL.
This transition window protects active developments and long-term capital planning cycles from sudden compliance shifts, allowing teams to complete ongoing design and construction phases using established criteria while phasing in newer standards.
When building out long-term asset management roadmaps, engineering leads should audit active project pipelines to identify which design elements rely on legacy thresholds. Establishing an internal transition schedule ensures that upcoming retrofits and new developments incorporate updated metrics before the three-year window closes, avoiding last-minute compliance scrambles during final review rounds.
Proactive portfolio management during this transition window helps prevent costly redesigns and aligns capital expenditure with future certification, performance and market expectations.
How to Build Scorecards and Sequence Submissions?
To build an effective scorecard, teams should plan design milestones around cross-certification submission windows and confirm official enrollment timelines directly with IWBI. To prepare a strong multi-certification submission, teams should map out key milestones early.
They can start by setting clear project boundaries during schematic design, completing baseline environmental testing early in construction and timing joint documentation submissions around final commissioning reviews. This sequence helps teams capture more credits while positioning commercial properties as high-performing sustainable assets in a changing global real estate market.
