New IREM® points pathway tool connects building sustainability certification to GRESB performance
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For real estate owners, asset managers, and property management teams, GRESB performance is no longer a reporting exercise that lives only with the sustainability team. It’s increasingly connected to investor expectations, portfolio strategy, and the day-to-day work happening inside buildings.
That’s why IREM created the CSP GRESB points pathway tool, a practical planning resource that helps teams understand how operational green building certifications can support GRESB outcomes. The tool is part of IREM’s broader thought leadership on sustainable property operations, giving owners and managers a clear way to connect certification strategy with portfolio performance.
What the pathway tool does
At a high level, the tool helps users model how certifying properties through the IREM Certified Sustainable Property (CSP) certification contributes to the operational building certification portion of the GRESB Real Estate Assessment. Users can enter portfolio assumptions, such as the number of assets they plan to certify and their property mix to see an estimate of potential BC1.2 contribution ranges and CSP certification investment.
While the result is not a guaranteed score, it gives teams a more informed starting point for planning. For companies working toward stronger sustainability reporting, better investor communication, or more consistent sustainability practices across a portfolio, that kind of directional insight can help define property performance goals.
Why IREM created it
Many organizations understand that building certifications matter to GRESB. The challenge is knowing where certification can make the biggest difference, and how to scale it beyond a few high-profile assets. Because GRESB awards certification credit based on certified floor-area share, portfolio coverage matters. A handful of plaques may not move the needle if most of the portfolio remains uncertified.
The points pathway tool reflects IREM’s role in helping the industry turn sustainability ambition into operational action. It translates a complex scoring concept into a practical planning conversation: Which assets should we certify? What level of coverage could matter? How can property management teams help create value that is visible in investor-facing reporting?
Where experts will use the tool
Experts advising owners, investors, and management companies can use the tool early in the planning process. For a sustainability consultant or GRESB advisor, it can help frame certification scenarios before a reporting cycle begins. For an asset manager, it can support conversations about where operational certification may create the greatest portfolio-level impact. For property management firms, it can help demonstrate how on-site execution supports broader ESG goals.
This matters because GRESB performance is increasingly tied to what happens at the property level. As Josh Kiser, LEED® AP O+M, IREM® CSP-AP, Senior Project Manager, Americas Sustainability Advisory, CBRE, Inc., AMO®, explains, “The real opportunity lives in the performance data, and that’s the property manager’s domain.” Building tenant rapport, capturing whole-building data, and maintaining it consistently are all operational practices that can support stronger reporting outcomes.
That’s also where portfolio-scale certification becomes powerful. Kiser notes that “certifying an entire portfolio rather than one building at a time changes everything” because it standardizes documentation, benchmarks assets using the same scale, and turns certification into “an ongoing performance program.”
A thought leadership resource for sustainable operations
The CSP GRESB points pathway tool is more than a calculator. It’s a conversation starter for a more mature approach to sustainability in real estate management, one that recognizes the connection between daily operations, portfolio consistency, certification strategy, and investor confidence.
For IREM, this is a natural extension of leadership in real estate management. The CSP was built for existing buildings and day-to-day property operations across multiple asset types. The pathway tool builds on that foundation by helping teams see how those operational practices can ladder up to larger ESG and GRESB objectives.
For owners and managers navigating ESG expectations, the tool offers a clearer way to ask better questions, plan earlier, and align the right assets with the right certification strategy. For experts supporting those teams, it provides a practical framework for turning complex GRESB scoring mechanics into actionable portfolio decisions.
Most importantly, it reinforces a message IREM has long championed: sustainable real estate performance depends on skilled property management. The portfolio may be the story, as Kiser says, but property teams write it every day.
