Greystar's Sustainability Report Highlights Progress Towards Net Zero
Greystar has published environmental performance data showing a 14.7% reduction in operational carbon emissions between 2022 and 2024. The global property investment and management company has also reported an 8.7% drop in energy intensity and a 4.1% decrease in water use across its residential portfolio during the same period.
These results matter because they demonstrate measured progress rather than promises alone. For UK businesses tracking real estate sustainability, particularly those with property portfolios or commercial landlords, the report offers concrete evidence that systematic data collection and asset-specific planning can deliver quantified improvements.
The figures come from Greystar's 2025 sustainability report, which covers discretionary residential investment vehicles and landlord-controlled areas. This boundary is important. The reductions reflect operational emissions under direct management control, not the full carbon footprint of construction, tenant activities or the broader value chain.
Meanwhile, the company has improved its standing in the Global Real Estate Sustainability Benchmark (GRESB). Across 32 submitted funds, Greystar achieved an average score of 84, compared with a global average of 79. Five funds received five-star ratings for the first time, and 86% of participating fund assets under management scored three stars or higher.
Targets set against 2022 baseline performance
Greystar's environmental commitments focus on three areas. The company aims to achieve net-zero operational carbon by 2040 in landlord-controlled spaces within its discretionary residential investment vehicles. It has also set a target to reduce energy intensity by 25% by 2030, measured against a 2022 baseline. A separate goal addresses onsite water use, with a planned 20% reduction by the same date.
These targets apply specifically to assets where Greystar exercises operational control. Consequently, they exclude embodied carbon from building materials, emissions from construction activities, and energy consumption by tenants. This distinction shapes how the results should be interpreted.
The reported reductions reflect efficiency investments, operational improvements and expanded data collection. Greystar states that its approach includes increasing access to lower-carbon and renewable energy sources, alongside asset-level decarbonisation planning.
Performance data in the 2025 report reflects calendar year 2024 outcomes. Later years will enter the reporting cycle after completion of the relevant GRESB assessment process. This timing explains why the report title references 2025 while presenting 2024 data.
Digital platform now covers 250 US properties
A notable development involves Greystar's expanded partnership with a digital decarbonisation planning platform. During 2024, more than 250 US properties were added to this system. The platform enables scenario modelling for emissions reduction and helps identify potential capital improvements across a wider section of the portfolio.
Thirteen properties received the platform's most detailed analysis, equivalent to an ASHRAE Level I energy audit. The resulting plans identified potential annual savings if recommended measures are implemented. Specifically, the assessments projected reductions of approximately 8.1 million kilowatt-hours of electricity and 906,876 therms of natural gas. These changes could eliminate roughly 5,986 metric tonnes of carbon-dioxide equivalent each year.
Earlier work on nine mid-rise and high-rise residential assets produced capital plans designed to deliver a 40% reduction in whole-building emissions by 2030. Engineering studies and net-zero assessments for those properties informed the investment planning.
This shift from portfolio-wide commitments toward property-specific analysis represents a practical approach. Rather than applying uniform technology programmes, Greystar uses building-level energy data and physical characteristics to determine which interventions are likely to be technically feasible and financially viable at individual sites.
For UK businesses considering similar approaches, the lesson is clear. Generic efficiency pledges matter less than detailed asset assessments that quantify savings and inform capital allocation. Carbon reporting programmes increasingly require this level of granularity, particularly for organisations pursuing net-zero certification or responding to PPN 06/21 requirements in public procurement.
GRESB scores provide investor-focused benchmarking
GRESB offers an investor-focused benchmark for assessing environmental, social and governance performance in real estate portfolios. Greystar uses the assessment to monitor investment vehicles and compare performance against industry peers.
The company's average score of 84 across 32 submitted funds sits above the global average of 79. However, a separate Greystar announcement concerning the 2025 GRESB results reported an average score of 83 across submitted vehicles, representing a 6% increase from the previous year. That announcement also stated that 69% of vehicles scored above their peer-group average.
The difference between these figures likely reflects variations in the populations or reporting bases used. Without further methodological clarification, the numbers should not be treated as interchangeable. Nevertheless, both sources confirm improved performance relative to prior years and peer comparisons.
Five funds earned five-star ratings for the first time, and eight received four stars. The proportion of fund assets under management achieving three stars or higher reached 86%.
GRESB ratings demonstrate stronger sustainability management systems and improved disclosure. However, they should not be confused with absolute emissions reductions. A high GRESB score indicates better reporting and governance structures, but does not guarantee that a portfolio has reduced its carbon intensity or operational impact.
External assessment highlights reporting limitations
Greystar's targets have also drawn external scrutiny. A 2025 ShareAction assessment, reported by Bisnow, criticised several major real estate investment managers for shortcomings in climate commitments. The assessment applied criteria including Scope 3 coverage, interim targets, fossil fuel restrictions in new developments and whole-life carbon assessments.
Greystar responded that it had committed to net-zero emissions by 2040 for landlord-controlled areas and was progressing toward its 2030 energy and water targets. A company spokesperson also stated that the underlying target data was externally assured.
This criticism does not invalidate the operational improvements Greystar has reported. However, it highlights an important limitation. Strong performance on landlord-controlled building operations does not necessarily demonstrate that a real estate manager has addressed the full climate impact of development, construction and tenant use.
For UK businesses, this distinction matters. Landlord-controlled operational emissions typically represent only part of a building's total carbon footprint. Embodied carbon from materials, construction emissions and tenant energy consumption often fall outside the scope of landlord net-zero targets. Businesses evaluating real estate sustainability claims should therefore examine reporting boundaries carefully.
Reported reductions across operational carbon, energy and water
Several key findings emerge from Greystar's performance data:
- Operational carbon emissions fell by 14.7% between 2022 and 2024, measured across landlord-controlled areas in discretionary residential investment vehicles.
- Energy intensity decreased by 8.7% over the same period, against a target of 25% reduction by 2030 from the 2022 baseline.
- Onsite water intensity dropped by 4.1%, compared with a 20% reduction target by 2030.
- The company achieved an average GRESB score of 84 across 32 submitted funds, above the global average of 79.
- Detailed assessments at 13 properties identified potential annual savings of approximately 8.1 million kilowatt-hours of electricity, 906,876 therms of natural gas, and 5,986 metric tonnes of carbon-dioxide equivalent.
- More than 250 US properties were added to a digital decarbonisation planning platform during 2024, enabling scenario modelling and capital planning at scale.
What the data tells UK businesses about decarbonisation
The reported reductions are significant because they provide quantified evidence of progress against defined baselines. The 14.7% decline in operational carbon and 8.7% reduction in energy intensity indicate that efficiency measures and improved portfolio data are producing measurable results.
For UK businesses with property portfolios, several implications emerge. First, asset-level data collection and analysis appears essential for effective decarbonisation. Greystar's expansion to more than 250 properties on its digital planning platform demonstrates that portfolio-scale modelling can identify common efficiency opportunities while detailed assessments support more precise capital planning.
Second, the estimated savings from the 13 detailed assessments suggest that decarbonisation may also reduce operating costs through lower electricity and gas consumption. This commercial case strengthens the argument for investment in efficiency measures, particularly as energy prices remain elevated.
Third, the distinction between operational emissions and full life-cycle carbon matters for compliance and procurement. Public sector suppliers responding to PPN 06/21 requirements must demonstrate carbon reduction plans. Understanding which emissions fall within reporting boundaries helps businesses avoid overstating progress or missing material sources of carbon.
However, significant challenges remain. Greystar must sustain reductions through 2030 and then accelerate further to reach its 2040 operational carbon goal. The company will also face questions about renewable energy procurement, electrification, building retrofits, capital allocation and the treatment of emissions outside landlord control.
GRESB results provide evidence of stronger sustainability management systems and investor-facing disclosure. However, the most consequential test will be whether improved scores translate into verified reductions across the wider portfolio and whether the company expands its climate accounting to include embodied and value-chain emissions.
UK businesses considering similar approaches should focus on verification and transparency. External assurance of target data strengthens credibility, but reporting boundaries must be clearly defined. A landlord-controlled operational carbon reduction is not equivalent to a whole-building or whole-life-cycle reduction.
Scale and pace determine long-term credibility
Greystar's 2025 sustainability report presents tangible progress on operational decarbonisation while operating within a relatively defined emissions boundary. The results strengthen the case for data-led, asset-level transition planning. Nevertheless, the company's long-term credibility will depend on continued delivery, transparent verification and broader treatment of the full carbon footprint of rental housing.
For UK businesses, the key lesson concerns the relationship between measurement, action and accountability. Quantified reductions against defined baselines matter more than long-term pledges alone. Detailed asset assessments that identify specific interventions and projected savings enable informed capital decisions.
At the same time, reporting boundaries shape how progress should be interpreted. Operational emissions represent only part of a building's total carbon impact. Businesses pursuing net-zero targets must decide whether to limit their scope to areas under direct control or to address embodied carbon, construction emissions and tenant activities as well.
The commercial implications extend beyond environmental performance. Investors increasingly use GRESB scores and similar benchmarks to assess portfolio risk and management quality. Public sector procurement requires carbon reduction plans and evidence of progress. Supply chain standards increasingly demand Scope 3 transparency. Consequently, businesses that develop robust measurement and reporting systems gain competitive advantage in tenders, financing and stakeholder relationships.
Greystar's expansion of digital decarbonisation planning across 250 properties demonstrates that technology can support portfolio-scale analysis. However, technology alone does not deliver reductions. Capital investment, operational changes and governance structures must follow from the data. Training and capability building help organisations translate assessments into action.
Ultimately, the test for any sustainability report is whether it enables informed decision-making. Greystar has provided quantified evidence of operational improvements and clear targets with defined baselines. The remaining challenge is to sustain progress, expand reporting boundaries and demonstrate that efficiency gains translate into broader carbon reductions across the full property life cycle.
Where to find additional information
For detailed analysis of Greystar's performance and methodology, the company's 2025 sustainability report provides full disclosure of targets, baselines and results. The report is available through Greystar's corporate website.
GRESB publishes detailed methodology and scoring guidance for real estate assessments. The GRESB website offers resources for understanding how environmental, social and governance performance is measured and benchmarked across global property portfolios.
UK businesses seeking guidance on carbon reporting and net-zero planning can consult the government's net-zero strategy, published by the Department for Energy Security and Net Zero. This document sets out the policy framework and sectoral pathways for achieving net-zero emissions by 2050.
For specific requirements on public procurement and carbon reduction, the Procurement Policy Note 06/21 explains how carbon reduction plans are assessed in major government contracts. This guidance applies to suppliers bidding for contracts valued above £5 million per year.
The Institution of Environmental Management and Assessment provides professional standards and resources on environmental reporting and carbon management. IEMA guidance covers Scope 1, 2 and 3 emissions accounting, helping businesses understand which sources fall within their reporting boundaries.