New RICS ESG guideline effective immediately

The 4th edition of the RICS guideline ESG and sustainability in commercial property valuation is officially in force as of April 30, 2026. In March, we already discussed the substantive changes for appraisers. Now that the effective date has passed, the question shifts to how this translates into the work appraisers produce.

The core content is known: ESG belongs in the valuation if it is value-relevant. The guideline primarily clarifies how to demonstrate this: separation between valuation and ESG advice, market evidence for value effects, traceable capex/opex assumptions, a structured KPI framework, and, for the first time, EU-specific guidance with references to SFDR, EU Taxonomy, and EPBD.

What does this mean concretely as of today? For most appraisers, little changes in the outcome of a valuation in the short term. The value of a building does not change simply because a guideline enters into force today. What *does* change is the bar for substantiation. Clients such as banks, funds, and institutional investors will tighten their requests in the coming months because their own reporting chains demand it. The RICS guideline provides them with a frame of reference to point to.

Three tightenings that make the difference this month

First: define the scope. In the assignment and reporting, explicitly state what falls within the valuation in terms of ESG-related aspects and what constitutes supplementary advice. This is the most underestimated tightening in the 4th edition and, at the same time, the easiest to implement today.

Second: treat ESG data as evidence. A passage about an energy label or an EPBD process is not substantiation. Substantiation means: where do you see it reflected in rent, yield, vacancy, costs, or risk? And if you don't see it, why not? Those who consistently record this build a dataset across valuations that actually makes the work easier.

Third: make the request repeatable. A fixed set of value-relevant ESG questions per asset type prevents you from starting every assignment from scratch.