About Stoneweg US
Stoneweg US is a multifamily real estate investment management firm committed to long-term sustainability, operational excellence, and responsible growth. With increasing expectations from institutional investors and private equity partners, Stoneweg US set out to build a robust, data-driven ESG strategy that could scale with their portfolio.
Industry
Multifamily Real Estate Investment
Location
United States
featured services
GHG Inventory | ESG Data Integration | WasteX Waste Management Optimization | Manual Metering & Data Capture | Portfolio-Wide Reporting Support | Emissions Analytics
Challenges They Faced
Stoneweg US had strong sustainability ambition, but lacked the data foundation needed to act on it. Their hurdles included:
- Limited Whole-Building Data: Less than 20% whole-building energy data coverage meant limited visibility into true portfolio performance.
- Difficulty Capturing Tenant & Unit-Level Data: Resident utility usage accounted for the majority of emissions, but privacy, regulations, and manual processes made data capture challenging.
- Complex GHG Inventory Requirements: Getting accurate Scope 1, Scope 2, and Scope 3 data required consistent tracking, high data quality, and coordinated support across teams.
- Fragmented Waste Insights: Without clear waste data, it was difficult to understand the emissions impact or opportunities for diversion.
- Growing Investor Expectations: Institutional investors required transparency, reliable reporting, and proof of operational improvements.
To scale ESG performance, Stoneweg US needed accurate whole-building data, a verified emissions baseline, and a partner capable of simplifying a highly complex data landscape.
Why Conservice?
Stoneweg US chose Conservice for its ability to turn ESG complexity into actionable insights and verifiable data.
Conservice provided:
- Accurate whole-building utility data through manual metering support
- Portfolio-wide GHG inventory development and emissions modeling
- WasteX insights to quantify landfill emissions and diversion opportunities
- A scalable structure for ESG reporting and ongoing disclosures
- Tools and expertise to future-proof their sustainability program
This partnership allowed Stoneweg US to strengthen investor confidence, streamline reporting, and build an ESG strategy aligned with both operational realities and long-term growth.
Our Solution
Conservice helped Stoneweg shift from fragmented data and manual workflows to an ESG program driven by integrated systems, verified data, and scalable processes.
Whole-Building Data Capture
Conservice worked with onsite teams to implement manual metering and expand data access, growing whole-building data coverage from <20% to >80% in early 2024. This future-proofed Stoneweg US’s utility tracking and enabled deeper performance insights.
Comprehensive GHG Inventory
With improved data integration, Stoneweg US completed its first full property-level GHG inventory. The analysis revealed:
-
92% of energy consumption was resident-driven
-
Scope 3 emissions made up the majority of total emissions
These insights helped define meaningful reduction strategies and regulatory risk exposure.
Expanded Qualitative ESG Indicators
In addition to utility data, Stoneweg US captured mechanical system inventories, refrigerant tracking, and asset-level attributes—creating a more complete story of property performance.
WasteX-Driven Waste Insights
WasteX helped Stoneweg US discover that nearly 20% of total emissions came from waste alone. By adding recycling programs across 100% of active properties, they achieved a 3.3% portfolio-wide diversion rate and diverted nearly 100,000 lbs of waste per month.
Scalable Reporting Framework
Conservice established repeatable processes so future GHG inventories, reporting cycles, and certification efforts became more efficient, accurate, and consistent.
This phased, strategic approach transformed ESG from a manual challenge into a value-creating operational system.
Results + Benefits
Stoneweg US achieved measurable operational, financial, and sustainability improvements by leveraging Conservice’s services.
GRESB Performance Growth
Stoneweg US improved its GRESB performance by 33% in 2023, a major signal to investors of operational strength and commitment to transparency.
Whole-Building Data Coverage
Whole-building data increased from under 20% to more than 80%, enabling accurate benchmarking, risk planning, and emissions analysis.
Stronger Investor Alignment
With verified data and ESG structural improvements, Stoneweg US now leverages sustainability to:
- Qualify for grants and preferential financing
- Reduce long-term operating costs
- Attract ESG-focused capital partners
- Strengthen portfolio resilience
Improved GHG Inventory Accuracy
With increased Scope 1 and Scope 2 coverage—and more Scope 3 data than ever—Stoneweg US now has a complete baseline for future investment-grade disclosures.
- Scope 1: increased from 43% to 87%
- Scope 2: increased from 20% to 67%
Waste Reduction & Diversion
Through WasteX, Stoneweg US:
- Added recycling to 100% of active properties
- Achieved a 3.3% portfolio-wide diversion rate
- Reduced contamination and improved resident recycling participation
- Identified waste as 21% of total emissions, enabling targeted reductions
Stoneweg US and Conservice proved that sustainability is not just a compliance requirement—it’s an untapped earning opportunity. By building strong data foundations, improving waste and emissions management, and aligning with investor expectations, Stoneweg US improved margins, reduced resident utility burdens, and created a more sustainable built environment.
With a complete baseline and 100% data completeness heading into 2023, Stoneweg US is now preparing for its next phase: science-based decarbonization targets and real-time resident-level data insights.
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