ISSB Reporting Goes Mandatory: A GCC Real Estate Owner's Compliance Guide

The International Sustainability Standards Board (ISSB) has fundamentally changed the global disclosure landscape. What began as a consolidation of fragmented sustainability frameworks has become the definitive baseline for climate and sustainability reporting worldwide. For real estate owners across the Gulf Cooperation Council, the implications are immediate and significant.

GCC regulators are moving swiftly to adopt ISSB standards. Saudi Arabia, the UAE, Kuwait, Qatar, and Oman have all signaled their intention to require ISSB-aligned disclosures, with implementation timelines ranging from 2024 to 2027. This guide provides real estate portfolio owners with a practical roadmap for compliance.

Understanding the ISSB Framework

The ISSB, established under the IFRS Foundation, released two foundational standards in June 2023: IFRS S1 (General Requirements for Disclosure of Sustainability-related Financial Information) and IFRS S2 (Climate-related Disclosures). Together, these standards create a comprehensive framework for sustainability reporting that builds on and incorporates the Task Force on Climate-related Financial Disclosures (TCFD) recommendations.

IFRS S1: General Requirements

IFRS S1 establishes the overarching framework for sustainability disclosures. It requires companies to report on sustainability-related risks and opportunities that could reasonably be expected to affect the entity's cash flows, access to finance, or cost of capital over the short, medium, and long term. The standard mandates disclosures across four pillars:

• Governance: How the organization oversees sustainability-related risks and opportunities, including board-level oversight and management responsibilities
• Strategy: The sustainability-related risks and opportunities that could affect business model, strategy, and financial performance
• Risk Management: Processes for identifying, assessing, prioritizing, and monitoring sustainability-related risks
• Metrics and Targets: Quantitative and qualitative metrics used to measure and manage sustainability performance

IFRS S2: Climate-related Disclosures

IFRS S2 provides specific requirements for climate-related disclosures. For real estate owners, the most significant requirements include:

• Greenhouse gas emissions: Mandatory disclosure of Scope 1, Scope 2, and Scope 3 emissions using the GHG Protocol methodology
• Climate scenario analysis: Assessment of strategy resilience under different climate scenarios, including physical and transition risks
• Transition plans: Disclosure of any climate-related transition plans, including targets and implementation strategies
• Physical and transition risks: Identification of climate-related risks to assets and operations, including acute events and chronic changes

GCC Jurisdiction Timelines

Each GCC jurisdiction is developing its own approach to ISSB adoption, though all are moving toward mandatory requirements. Understanding your operating jurisdictions' timelines is essential for compliance planning.

Saudi Arabia: Leading GCC Adoption

Saudi Arabia has been particularly proactive in ISSB adoption, aligning with its Vision 2030 sustainability ambitions. The Capital Market Authority (CMA) requires listed companies to provide ISSB-aligned disclosures, with the first mandatory reports due for fiscal year 2025. Real estate investment trusts (REITs) and listed property companies are included in this scope.

UAE Financial Centers

Both DIFC and ADGM have moved ahead of federal UAE requirements, implementing sustainability disclosure frameworks aligned with ISSB principles. For real estate funds and REITs domiciled in these financial centers, compliance requirements are already in effect, with phased implementation allowing for Scope 3 reporting to follow initial requirements.

What ISSB Means for Real Estate

Real estate portfolios face specific challenges and opportunities under ISSB reporting. The building sector's high energy consumption, long asset lifespans, and exposure to physical climate risks make it a focal point for climate-related disclosures.

Scope 1 Emissions: Direct Operations

Scope 1 emissions for real estate typically include:

• On-site fuel combustion: Gas boilers, backup generators, and heating systems
• Refrigerant leakage: From HVAC and cooling systems, particularly significant for older equipment
• Company vehicles: Fleet vehicles for property management and maintenance

For most GCC real estate portfolios, Scope 1 emissions represent a relatively small portion of total emissions, typically 5-15%, given the prevalence of district cooling and electric systems.

Scope 2 Emissions: Purchased Energy

Scope 2 represents the largest emissions category for most real estate portfolios:

• Purchased electricity: For common areas, central systems, and landlord-controlled spaces
• District cooling: Prevalent across GCC commercial and residential properties
• District heating: Less common in GCC but applicable for some mixed-use developments

ISSB requires disclosure of both location-based and market-based Scope 2 emissions, allowing companies to demonstrate emissions reductions from renewable energy procurement.

Scope 3 Emissions: The Complex Challenge

Scope 3 presents the greatest complexity for real estate. ISSB requires disclosure of material Scope 3 categories, though it allows a one-year grace period for initial reporting. For real estate, material categories typically include:

• Category 13 (Downstream leased assets): Tenant energy consumption in leased spaces, often the largest single emissions source for commercial landlords
• Category 1 (Purchased goods and services): Construction materials, maintenance supplies, and professional services
• Category 2 (Capital goods): Major equipment purchases and construction activities
• Category 11 (Use of sold products): For developers, the operational emissions of buildings sold

Building Compliance Infrastructure

ISSB compliance requires more than annual data collection. You need systems and processes that generate reliable, auditable data throughout the year.

Data Management Systems

Effective ISSB reporting requires integrated data management:

• Utility data automation: Direct feeds from utility providers or building management systems, eliminating manual entry errors
• Asset-level tracking: Individual building data that can be aggregated for portfolio-level reporting
• Calculation engines: Automated GHG calculations using appropriate emission factors for each jurisdiction
• Audit trails: Complete documentation of data sources, methodologies, and any estimates or assumptions

Governance Structures

ISSB explicitly requires disclosure of governance arrangements. Build structures that demonstrate:

• Board oversight: Regular board-level review of climate risks and sustainability performance
• Management accountability: Clear responsibilities for sustainability data and target achievement
• Integration with risk management: Climate risks incorporated into enterprise risk frameworks
• Incentive alignment: Where applicable, sustainability metrics linked to executive compensation

Third-Party Assurance

While ISSB does not mandate external assurance, investors and regulators increasingly expect it. Begin building toward assurance-ready data by:

• Documenting all methodologies and data sources
• Implementing internal controls over sustainability data
• Conducting internal reviews before external reporting
• Engaging assurance providers for readiness assessments

Implementation Roadmap

A phased approach to ISSB compliance helps manage complexity while building toward comprehensive reporting.

Phase 1: Foundation (Months 1-6)

• Conduct gap analysis against ISSB requirements
• Establish data collection processes for Scope 1 and 2 emissions
• Map Scope 3 categories and assess data availability
• Define governance structures and responsibilities
• Identify technology requirements and select platforms

Phase 2: Data Infrastructure (Months 6-12)

• Implement utility data automation across portfolio
• Deploy calculation methodologies with appropriate emission factors
• Establish tenant data collection processes
• Conduct initial climate risk assessments for key assets
• Begin populating ISSB disclosure templates

Phase 3: Refinement (Months 12-18)

• Complete full year of automated data collection
• Develop climate scenario analysis methodology
• Expand Scope 3 coverage to all material categories
• Engage assurance provider for readiness review
• Prepare first ISSB-aligned disclosure

Phase 4: Optimization (Ongoing)

• Implement improvements based on first disclosure cycle
• Expand physical risk analysis across portfolio
• Develop transition plan with science-based targets
• Move toward limited then reasonable assurance
• Integrate climate metrics into investment decisions

Common Challenges and Solutions

Having supported multiple real estate portfolios through ISSB preparation, we've identified recurring challenges and effective solutions.

Challenge: Incomplete Tenant Data

The Problem: Many landlords lack access to tenant energy consumption data, making Category 13 Scope 3 calculations impossible.

The Solution: Implement a multi-pronged approach. For new leases, include mandatory data sharing provisions. For existing tenants, offer incentives for data sharing or install sub-metering during common area upgrades. Where data gaps remain, use recognized estimation methodologies (such as CRREM or GRESB benchmarks) with clear disclosure of estimation approaches.

Challenge: Multiple Jurisdictions

The Problem: Portfolios spanning multiple GCC countries face different emission factors, regulatory requirements, and implementation timelines.

The Solution: Build flexible data infrastructure that accommodates jurisdiction-specific emission factors while enabling consolidated reporting. Align to the most stringent jurisdiction's timeline to avoid multiple implementation cycles.

Challenge: Physical Risk Assessment

The Problem: ISSB requires assessment of physical climate risks, but most real estate portfolios lack systematic climate risk analysis capabilities.

The Solution: Partner with climate data providers who offer asset-level risk assessments. Focus initial efforts on highest-value assets and those in vulnerable locations. Use standardized scenarios (IPCC pathways) that allow comparison across assets.

Challenge: Scope 3 Boundary Setting

The Problem: Determining which Scope 3 categories are "material" requires judgment, and inconsistent boundaries undermine comparability.

The Solution: Start with categories that are clearly material for real estate (Categories 1, 2, 11, 13) and document your materiality assessment methodology. As data improves, expand to additional categories. Follow GHG Protocol guidance and industry precedents.

Challenge: Historical Data Gaps

The Problem: ISSB requires comparative disclosures, but many portfolios lack historical emissions data.

The Solution: Begin data collection immediately, even if imperfect. For historical periods, use estimation based on available records (utility bills, building characteristics). Clearly disclose any restatements as data quality improves.

The Competitive Advantage

While ISSB compliance requires investment, it also creates opportunities. Portfolios that move early on ISSB readiness will benefit from:

• Capital access: Growing pools of sustainable investment capital require ISSB-aligned disclosures for allocation decisions
• Tenant attraction: Corporate tenants with their own ISSB obligations need buildings that support their emissions reduction goals
• Risk management: Systematic climate risk assessment identifies vulnerabilities before they become value impairments
• Operational efficiency: Data infrastructure for emissions tracking often reveals efficiency opportunities
• Regulatory readiness: Early movers avoid compliance scrambles and associated costs

Summary: Your ISSB Action Plan

ISSB reporting is not a distant future concern for GCC real estate owners. With mandatory requirements already in effect in UAE financial centers and rolling out across the region through 2027, the time to act is now.

Priority actions for 2025:

• Conduct a gap analysis against IFRS S1 and S2 requirements
• Establish Scope 1 and 2 emissions baselines across all assets
• Map Scope 3 categories and begin tenant data collection
• Build governance structures with clear board and management accountability
• Invest in data infrastructure that will support long-term compliance
• Engage with tenants on green lease provisions and data sharing

The transition to ISSB-aligned sustainability reporting represents a fundamental shift in how real estate portfolios communicate with investors. Those who embrace this change proactively will find themselves well-positioned for a capital market that increasingly rewards transparency and climate resilience.