2025 Sustainability & Impact Report

Letter to Our Stakeholders

In 2025, we continued to execute with discipline and a long-term perspective, developing and operating premier workplaces that deliver positive outcomes for our clients, shareholders, employees, and the communities where we invest. We remain on track in executing our sustainability strategy, which is embedded in how we allocate capital, manage our premier workplace properties, and position BXP for durable growth. Across our portfolio, our teams are focused on identifying and implementing cost-effective initiatives that conserve resources, enhance building performance, control operating expense growth, and strengthen resilience.

Sustainability at BXP is fundamentally about performance and value creation. Through electric, steam, and natural gas efficiency projects and energy procurement strategies, we are reducing energy-related operating expense escalation and primary fossil fuel consumption while lowering greenhouse gas (GHG) emissions and maintaining compliance with local codes and regulations, including building performance standards. At the same time, the integration of sustainable design, high-performance building systems, and low-carbon materials continues to differentiate our premier workplaces and attract leading clients that prioritize health, efficiency, and operational excellence. Our focus on performance, risk management, and capital efficiency enhances our ability to prepare for evolving client requirements, regulatory constraints, escalating energy rates, and the broader energy transition.

In 2025 we advanced our Sustainability & Impact efforts by:

Improving energy efficiency by achieving an energy intensity reduction of 38% below a 2008 base year,
Achieving carbon-neutral operations for GHG emissions Scopes 1 and 2,
Increasing total property area certified under the U.S. Green Building Council Leadership in Energy and Environmental Design (LEED) rating system to 35.6 million square feet, of which 94% is certified at the highest Gold and Platinum levels,
Initiating 2.1 million square feet of retro-commissioning, bringing our three-year retro-commissioning program total to 15.3 million square feet,
Completing measurement, verification, and the LEED Zero certification submission for 140 Kendrick Street – Building A, an industry-leading net-zero conversion of an existing office building,
Completing a major heat recovery retrofit at 601 Lexington Avenue in New York, NY, as the first company in the cohort to fulfill obligations under NYSERDA’s Empire Building Challenge, and
Progressing contracted clean energy supply with the construction phase commencement of a 20 MW solar project, from which we will procure clean power under a power purchase agreement.

Our Sustainability & Impact leadership was recognized by numerous industry groups and received the distinction of:

The Center of Active Design’s Fitwel Best in Building Health Award Winner,
A City of Boston Climate Leader and the Building Emissions Reduction and Disclosure Ordinance (BERDO) Energy Efficiency Spotlight,
GRESB 5-star Rating, GRESB Sector Leader – Development,
Green Lease Leader – Platinum,
S&P Global Sustainability Yearbook Member,
Sustainalytics Low Carbon Leader, and
Being listed as a responsible and sustainable company by multiple national publications.

Taken together, these highlights and the ongoing efforts to execute our sustainability strategy reflect a pragmatic, returns-driven approach. By operating more efficiently, investing thoughtfully, and managing risk proactively, we are reinforcing the strength of our platform and creating long-term value for our shareholders.

Owen D. Thomas, Chairman & CEO Douglas T. Linde, President

To read the full 2025 BXP Sustainability & Impact Report, download the attached document.