New rules on greenwashing mean that ESG claims will no longer be defined by ambition, but by evidence, reports Sebastian Kreutel.

Over the past decade, the European Union has constructed a dense regulatory architecture for sustainable finance, initially focused on transparency. Cornerstones such as the Sustainable Finance Disclosure Regulation (Regulation (EU) 2019/2088) and the EU Taxonomy Regulation (Regulation (EU) 2020/852) were designed to improve comparability and enable investors to make informed decisions.

Yet, as market practice evolved, these frameworks were increasingly used not only as disclosure regimes but as de facto labelling systems. This was most visibly through the widespread interpretation of SFDR Articles 8 and 9 as product categories.

This development exposed a structural weakness: while transparency requirements improved the availability of ESG-related information, they did not sufficiently prevent misleading or exaggerated sustainability claims. Regulators across the EU, supported by supervisory authorities such as ESMA, have repeatedly highlighted greenwashing risks as a systemic concern.

The EU’s response is not a single directive but a regulatory package that effectively creates a “greenwashing enforcement layer”. At its core are amendments to the Unfair Commercial Practices Directive through the Empowering Consumers for the Green Transition Directive, alongside the proposed Green Claims Directive. Together, these instruments introduce legally binding requirements on how environmental claims are formulated, substantiated and verified.

For real estate funds and their managers, the implications are particularly significant. Real assets are inherently tied to environmental performance. Energy consumption, emissions intensity, and physical climate risks directly affect asset valuation. As a result, sustainability claims are not peripheral marketing elements but central components of investment strategy, fundraising and portfolio management. The new rules therefore strike at the core of how real estate funds are positioned in the market.

Regulatory design: what the new greenwashing rules actually require

At the heart of the emerging framework lies a simple but far-reaching principle: any environmental claim must be true, specific and substantiated. This principle is now codified in EU consumer protection law and will be further operationalised through detailed technical requirements under the proposed Green Claims Directive.

The amended Unfair Commercial Practices Directive explicitly prohibits vague environmental claims such as “environmentally friendly” or “climate neutral”, unless they can be supported by verifiable evidence. It also bans claims based solely on carbon offsetting where these create a misleading impression of neutrality. Importantly, the directive extends the blacklist of unfair practices, thereby elevating greenwashing from a reputational issue to a clear legal infringement.

The Green Claims Directive goes a decisive step further. It introduces a structured framework for substantiating voluntary environmental claims. Companies must rely on recognised scientific evidence, assess the full lifecycle of products or services where relevant, and transparently disclose methodologies and assumptions. Perhaps most transformative is the requirement for ex-ante verification: environmental claims must be independently verified by accredited bodies before they are communicated.

For real estate funds, this has operational consequences. Claims such as “Paris-aligned portfolio”, “net-zero pathway”, or “taxonomy-aligned investments” will require granular, asset-level data, consistent calculation methodologies, and full documentation. The regulatory expectation is no longer that firms explain their ambitions, it is that they demonstrate measurable and verifiable outcomes.

This new layer interacts closely with existing ESG regulation. The Corporate Sustainability Reporting Directive ensures that companies disclose sustainability-related data at entity level, while SFDR governs disclosures at product level. The greenwashing framework effectively sits on top of both: it ensures that any claim derived from these disclosures, whether in investor presentations, fund documentation, or marketing materials,
is legally robust.

Implications for real estate funds

For real estate funds, the most immediate implication is a forced reassessment of ESG positioning. Under SFDR, many products have been classified as Article 8 or Article 9 based on relatively high-level strategies. Under the new regime, such positioning must be supported by quantifiable evidence.

This is likely to lead to a gradual but visible recalibration of the market. Some funds may need to scale back their sustainability claims where data or methodologies are insufficient. Others will invest in upgrading their data infrastructure and asset-level monitoring capabilities in order to maintain or strengthen their ESG positioning.

The impact on new product development is even more pronounced. ESG characteristics can no longer be layered onto a fund as a marketing feature; they must be embedded from the outset. Investment strategies will need to define clear KPIs, such as energy intensity reduction pathways, carbon budgets, or taxonomy alignment thresholds and ensure that these can be measured and verified over time.

‘The EU’s greenwashing regulation marks a turning point in sustainable finance. What began as a transparency exercise is evolving into a system of legal accountability.’

Sebastian Kreutel, PwC Germany

In practice, this shifts the focus from “green labels” to sustainability and transition strategies. For many real estate portfolios, particularly in core European markets, achieving taxonomy alignment is neither immediately feasible nor economically optimal. Instead, credible transition pathways, supported by capex plans, renovation strategies and measurable decarbonisation trajectories, will become the central narrative.

Real estate portfolios are fragmented and data availability remains uneven. Energy consumption data may depend on tenant cooperation; building-level emissions data may require estimation models; and methodologies differ across jurisdictions. The requirement for consistent, verifiable data across entire portfolios therefore represents a significant investment challenge and operational burden.

Marketing and investor communication will also have to change for some market participants. Broad ESG narratives will give way to precise, evidence-based statements. Claims will need to be directly linked to underlying data and methodologies, and inconsistencies across documents will become regulatory risks rather than editorial oversights.

Value creation, risks and market consequences

Despite the operational challenges, the new framework brings a clear benefit: it strengthens the credibility of the ESG market. Investors, particularly institutional capital providers, have long demanded greater clarity and comparability. By imposing strict substantiation requirements, the EU effectively raises the quality threshold for ESG products.

For real estate, this supports the recognition of sustainability as a genuine value driver. Assets with strong energy performance, credible decarbonisation pathways and robust data transparency are likely to benefit from improved financing conditions, stronger investor and tenant demand, and potentially higher valuations. Conversely, assets lacking transparency or facing significant transition risks may experience a repricing.

However, the framework is not without drawbacks. Compliance costs will increase, particularly for smaller managers. The requirement for third-party verification will create additional cost, at least in the short term. There is also a risk that the regulatory burden will lead to a degree of standardisation that limits innovation or discourages voluntary sustainability initiatives.

At the same time, the new rules create clear strategic opportunities. Managers that invest early in data quality, governance and credible transition strategies can position themselves as trusted ESG leaders. In a market where credibility is increasingly scarce, this can become a decisive competitive advantage.

The key risk lies in execution. The interpretation of substantiation requirements, the availability of verification services, and the alignment between EU-level rules and national enforcement practices will all shape how the framework operates in practice. Market participants must remain agile and closely monitor regulatory developments.

What asset managers need to do now

Against this backdrop, real estate fund managers face a clear mandate: move from ESG storytelling to ESG proof.

This begins with a comprehensive review of all existing sustainability claims. Firms must identify where claims rely on assumptions, incomplete data, or inconsistent methodologies. In parallel, they need to invest in robust data infrastructures that enable asset-level tracking of key ESG metrics, aligned with both CSRD and SFDR requirements.

Equally important is the development of clear and defensible methodologies. Whether calculating carbon footprints, defining transition pathways, or assessing taxonomy alignment, firms must ensure that their approaches are transparent, consistent, and well-documented.

Preparation for third-party verification should start early. Engaging with auditors and verification bodies, testing methodologies, and establishing internal governance processes will be critical to avoid bottlenecks once the rules are fully in force.

Finally, communication strategies must be recalibrated. ESG messaging needs to become more precise, more technical, and more closely aligned with underlying data. This requires not only new processes, but also a cultural shift within organisations towards greater integration of sustainability, compliance and investor relations functions.

Data and proofing reliance

The EU’s greenwashing regulation marks a turning point in sustainable finance. What began as a transparency exercise is evolving into a system of legal accountability. For real estate funds, this represents both a challenge and an opportunity.

The era of broad ESG narratives is coming to an end. In its place emerges a framework in which sustainability claims must be substantiated, verified, and legally defensible. For those who adapt early by embedding robust data, credible strategies and disciplined communication, this shift offers not only compliance but competitive advantage.

In the end, the message is simple: in Europe’s real estate market, ESG is no longer defined by ambition. It is defined by evidence.

Sebastian Kreutel is director and head of real asset financial services at PwC Germany