Our environmental sustainability program provides leadership and sets standards in innovation and technology.
We focus on quantifiable improvement in energy efficiency, water efficiency, recycling, and waste diversion. ESRT’s cutting-edge work in energy efficiency, for the benefit of our tenants and the environment, is recognized worldwide.
For more than a decade, we have prioritized healthy work environments for our tenants and employees through IEQ. To foster employee health and productivity, we partner with our tenants to empower them to be better designers, builders, and operators of their own spaces.

HIGH PERFORMANCE, HEALTHY BUILDINGS
- For more than a decade, improving IEQ has been a key tenet of our sustainability strategy. Our industry-leading, comprehensive and state-of-the-art program focuses on operational best practices including MERV-13 filters, bipolar ionization air purification technology, indoor air quality testing, CO2 sensors, and monitors to ensure healthy, productive spaces, green cleaning practices, integrated pest management strategies, and low-emitting materials.
- High-Performance, healthy building guidelines are integrated into all leases. These guidelines include performance-based criteria for energy, water, healthy IEQ, responsible materials specifications and waste diversion.

Sustainability Policies
We have developed Standard Operating Procedures which are consistently implemented and tracked throughout 100% of our buildings. These are intended to set goals, strategies, best practices and resources to equip our property management and buildings operations staff to implement practices in alignment with our strategy. See SOPs

Vendor Code of Conduct
Our vendor code of conduct guides ESRT vendors to meet our mandates and helps promote and measure sustainability, diversity, and ethical conduct in our vendor relationships. We seek vendors that provide services that embrace ESRT’s commitment and enforce the code provisions throughout their organization and across our supply chain. See Code of Conduct

Tenant Engagement
Our engagement with tenants begins with the integration of a suite of sustainability provisions in all of our leases. Our lease requirements encourage collaboration between tenant and landlord to achieve efficiency improvements. We share energy, waste, and IEQ data with our tenants, and provide hands-on expertise to ensure continued sustainability performance.

Data Driven Performance
The foundation of our sustainability program is to measure, manage, and
evaluate performance against our goals. We leverage data management platforms and cutting-edge technologies to provide advanced analytics
and insights to inform and improve our performance.
We partner with a leading energy analysis firm to review energy supply, demand, budgets and pricing to plan accordingly for energy supply and current and future renewable sources.
To achieve our goals, we focus on ROI-driven energy efficiency strategies in leading technology and advanced analytics — supported by quantifiable performance improvements across the portfolio.

INDOOR ENVIRONMENTAL QUALITY Goals
Indoor Environmental Quality (IEQ) improves employee health and productivity. We’ve created a program of industry-leading healthy suites to provide tenants with the opportunity to maximize their IEQ, employee recruitment and retention, and their bottom line.
- MERV 13 filters in 100% of ESRT-controlled HVAC Systems
- Meet or exceed ASHRAE 62.1 standards for ventilation at 100% of properties
- Perform comprehensive indoor air quality testing at 100% of properties
- Implement green cleaning and integrated pest management practices at 100% of properties
- No or low VOC and no Red List Materials required as part of High-Performance Sustainable Healthy Building Guidelines
- Continue our rollout of active bipolar ionization air purification in select public areas and all new pre-builts, currently installed in over one million square feet across the portfolio
ESG DISCLOSURE AND CERTIFICATIONS
- Pursue ENERGY STAR Certification at 100% of eligible buildings
- Report to GRESB annually
- Align reporting with Task Force on Climate-Related Financial Disclosures (TCFD), SASB, and GRI as feasible
- Perform third-party data verification in alignment with ISO 14064-3
- Maintain WELL Health-Safety Rating annually
- Environmental Management System aligned with ISO 14001 adopted in 2020
- Climate Change Adaptation and Resilience plan intended to align with TCFD

All goals and targets represent like-for-like comparisons for assets owned for 24 consecutive months across the current and previous reporting year
ENVIRONMENTAL PERFORMANCE
ESRT commits to disclose key environmental performance metrics across energy, GHG emissions, water and waste to track , evaluate & improve performance