WELL
Performance-based certification for occupant health in buildings
BREEAM
Global sustainability certification framework for built environment.
Quick Verdict
WELL focuses on human health via performance-tested IEQ metrics, while BREEAM targets environmental sustainability through weighted credits. Companies adopt WELL for occupant wellbeing and ESG 'people' metrics; BREEAM for energy savings, regulatory alignment, and asset value uplift.
WELL
WELL Building Standard v2
Key Features
- Mandatory on-site performance verification testing
- 10 core concepts with preconditions and optimizations
- Bronze-Silver-Gold-Platinum tiers via point scoring
- Continuous monitoring pathways for compliance
- People-first health focus complements LEED
BREEAM
Building Research Establishment Environmental Assessment Method
Key Features
- Credit-based scoring with category weightings
- Third-party BRE certification and audits
- Lifecycle schemes for new, existing, infrastructure
- 10 core sustainability assessment categories
- Evidence-driven compliance via KBCNs
Detailed Analysis
A comprehensive look at the specific requirements, scope, and impact of each standard.
WELL Details
What It Is
WELL Building Standard v2 is a performance-based certification framework administered by the International WELL Building Institute (IWBI). It focuses on designing, operating, and verifying buildings to advance human health and well-being through evidence-based strategies. Its people-first approach emphasizes measurable occupant outcomes via 10 core concepts like Air, Water, and Mind, using mandatory Preconditions and optional Optimizations.
Key Components
- **10 conceptsAir, Water, Nourishment, Light, Movement, Thermal Comfort, Sound, Materials, Mind, Community (plus Innovation).
- 24 Preconditions (pass/fail) and 102 Optimizations (points-based).
- Built on public health research and building science.
- Certification tiers: Bronze (40 points), Silver (50), Gold (60), Platinum (80) with concept balance rules.
Why Organizations Use It
Enhances productivity, tenant retention, ESG reporting, and market differentiation (e.g., higher rents). Mitigates health risks; builds stakeholder trust via verified performance. Complements LEED for holistic sustainability.
Implementation Overview
Phased: gap analysis, scorecard, documentation, on-site verification, recertification every 3 years. Applies to new/existing buildings, all sizes/industries globally. Requires third-party testing and cross-functional teams.
BREEAM Details
What It Is
BREEAM (Building Research Establishment Environmental Assessment Method) is a science-led sustainability certification framework for the built environment. Developed by BRE in 1990, it assesses environmental, social, and resilience performance across buildings, infrastructure, and communities. Its credit-based methodology organizes requirements into weighted categories, converting compliance into ratings from Pass to Outstanding.
Key Components
- **10 core categoriesManagement, Health & Wellbeing, Energy, Transport, Water, Materials, Waste, Land Use & Ecology, Pollution, Innovation.
- Hundreds of credits with prerequisites, evidence requirements, and Knowledge Base Compliance Notes (KBCNs).
- Built on third-party assurance via licensed assessors and BRE audits (ISO/IEC 17065 accredited).
- Scheme-specific manuals for New Construction, In-Use, Refurbishment, Infrastructure, etc.
Why Organizations Use It
- Drives ESG compliance, net-zero alignment, and EU Taxonomy readiness.
- Yields energy savings (22-33%), asset value uplift (up to 30%), and risk mitigation.
- Enhances market differentiation, tenant appeal, and regulatory alignment.
- Builds stakeholder trust through audited certification.
Implementation Overview
- Phased approach: pre-assessment, design integration, construction evidence, certification.
- Early assessor/AP appointment essential; applies to all sizes, global with local adaptations.
- Requires training, evidence management, and optional In-Use recertification (3 years).
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Key Differences
| Aspect | WELL | BREEAM |
|---|---|---|
| Scope | Occupant health & wellbeing (10 concepts: Air, Water, etc.) | Environmental sustainability (10 categories: Energy, Ecology, etc.) |
| Industry | All buildings globally (offices, residential, etc.) | All buildings/infrastructure globally (with regional adaptations) |
| Nature | Voluntary performance-based certification | Voluntary science-led certification scheme |
| Testing | Mandatory on-site performance verification/testing | Licensed assessor evidence review + BRE audits |
| Penalties | No certification if preconditions fail | No certification/credits if evidence fails QA |
Scope
Industry
Nature
Testing
Penalties
Frequently Asked Questions
Common questions about WELL and BREEAM
WELL FAQ
BREEAM FAQ
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