New Valuation Standards in Spain 2025: Sustainability, Digitalization & Transparency

Overview of Spain's Updated Real Estate Valuation Framework (ECM/599/2025)

After 22 years under the ECO/805/2003 Order, Spain's real estate appraisal framework required modernization to meet the growing demands of sustainability, digitalization, and transparency. The ECM/599/2025 Order, effective August 12, 2025, aligns valuation standards with the latest European practices, incorporating environmental factors, energy certifications, automated valuation methods, and stricter documentation requirements. This update benefits investors, developers, financial institutions, and appraisers alike.

Table of Contents

• Introduction
• Key Updates in ECM/599/2025
  • Essential License for Under-Construction Properties
  • Sustainability Principle
  • Mandatory Energy Certificate (CEE)
  • Unified Valuation Update Period
  • Report Traceability and Formality
  • Changes in Surface Calculation
  • Transparency in Comparables
  • Mortgage Coefficient Application
  • Automated Valuation Methods (AVM)
  • Effective Date
• Practical Examples
• Conclusion
• Frequently Asked Questions

Introduction

The new ECM/599/2025 Order modernizes Spain's real estate appraisal standards to address sustainability, energy efficiency, and digital transformation. This regulatory update ensures that valuations reflect environmental factors, improve transparency, and adopt automated methods where appropriate. Financial institutions, investors, developers, and appraisers must adapt quickly to comply and leverage these updates for more accurate, future-proof valuations.

Key Updates in ECM/599/2025

1. Essential License for Under-Construction Properties

The “essential license” is now recognized as a valid document for valuing properties under construction. It allows financing during early stages if it:

• Authorizes construction initiation without replacing the final building permit.
• Covers a substantial portion of the project (using PEM as reference).
• Includes a declaration of new construction registered in the Land Registry.

2. Sustainability Principle (Art. 3)

Appraisers must now consider environmental attributes when relevant to market value. Energy efficiency, flood or fire resilience, carbon footprint, and climate risk factors are integrated into comparable selection and adjustment processes. This aligns with ECB guidance for internalizing environmental risks in collateral valuations.

3. Mandatory Energy Certificate (CEE)

Every appraisal must include the Energy Efficiency Certificate (CEE), providing verifiable information on energy demand and emissions. This ensures sustainability impacts the valuation positively or negatively, supporting prudent investment decisions.

• Completed buildings: CEE registered.
• Under-construction properties: CEE + registration request proof.
• The appraisal firm incorporates the CEE; it does not issue it.

4. Unified Valuation Update Period: 2 Years

All financial purposes now share a maximum update interval of 24 months, removing previous exceptions for insurers and reinsurers.

5. Report Formality and Traceability

• Mandatory index at the start.
• Advanced electronic signatures for all contributors.
• Official source documentation must be preserved (no photocopies).

6. Changes in Surface Calculation

Usable surface is prioritized over gross constructed area, and exterior spaces like terraces are excluded. Differentiated spaces (garages, storage) must be valued separately with a detailed table.

7. Transparency in Comparables

Appraisers must document sources, adjustment methods, and applied coefficients. Justification is required for any deviations, ensuring consistency and traceability.

8. Mortgage Coefficient Application

The warning period for significant value reduction extends to 18 months post-expiration. Previous 3-year drop requirements are removed.

9. Automated Valuation Methods (AVM)

Basic rules are introduced for AVMs under Art. 44 bis of RDL 24/2021, with technical development delegated to the Bank of Spain.

10. Effective Date

The ECM/599/2025 Order takes effect two months after publication in the BOE, officially starting on August 12, 2025.

Practical Examples

Example 1: Early-Stage Construction Financing

A developer in Madrid wants to start a residential project in Valencia. Using the “essential license,” the bank approves financing during initial construction phases, allowing earlier cash flow and project momentum.

Example 2: Integrating Sustainability in Valuations

An appraiser assesses a green office building. With the CEE and sustainability adjustments, the property’s value reflects higher energy efficiency and reduced operational costs, enhancing its market attractiveness.

Example 3: Automated Valuation Application

A financial institution uses AVMs to quickly estimate collateral values for multiple properties. By following the ECM/599/2025 rules, the automated valuations comply with traceability and adjustment standards.

Conclusion

The ECM/599/2025 Order modernizes Spain's real estate valuation framework by integrating sustainability, energy efficiency, digital methods, and improved transparency. Appraisers, investors, and financial institutions benefit from more accurate, comparable, and forward-looking valuations. To ensure compliance and maximize opportunities, consult experts specialized in Spanish property appraisals and financial regulations.

Frequently Asked Questions

What is the Essential License and when is it used?

It is a municipal authorization that allows early-stage construction financing and can be used for property valuation before the full building permit is granted.

Are sustainability factors mandatory in every appraisal?

Yes, appraisers must consider environmental attributes if they impact market value, following the new sustainability principle.

Do all properties require an Energy Efficiency Certificate?

Yes, for completed buildings and properties under construction, the CEE must be included in the appraisal file.

What is the update period for financial valuations?

All financial valuations must be updated every 24 months, removing previous exceptions.

Can Automated Valuation Methods (AVM) be used legally?

Yes, AVMs are allowed if they comply with ECM/599/2025 rules and Bank of Spain technical guidance.