NIST 800-171 vs WELL
NIST 800-171
U.S. standard protecting CUI in nonfederal systems
WELL
Performance-based certification for occupant health in buildings
Quick Verdict
NIST 800-171 mandates CUI protection for defense contractors via controls and audits, while WELL certifies building health through performance testing. Organizations adopt NIST for contract compliance; WELL for occupant wellness, productivity, and ESG differentiation.
NIST 800-171
NIST SP 800-171 Protecting CUI in Nonfederal Systems
Key Features
- Safeguards CUI confidentiality in nonfederal systems
- Requires SSP and POA&M for implementation evidence
- Organized into 14-17 security requirement families
- Supports CUI enclave scoping to limit scope
- Contract-enforced via DFARS for federal contractors
WELL
WELL Building Standard v2
Key Features
- 10 core concepts for occupant health domains
- Mandatory preconditions and point-based optimizations
- On-site performance verification testing required
- Certification tiers Bronze to Platinum with scoring
- Continuous monitoring pathways for compliance
Detailed Analysis
A comprehensive look at the specific requirements, scope, and impact of each standard.
NIST 800-171 Details
What It Is
NIST SP 800-171 (Revision 3, May 2024) is a U.S. government framework providing security requirements to protect Controlled Unclassified Information (CUI) confidentiality in nonfederal systems. Tailored from SP 800-53 Moderate baseline, it applies to components processing, storing, transmitting CUI or providing protection, using a control-based, scoped approach.
Key Components
- 17 families in r3 (e.g., Access Control, Audit, Supply Chain Risk Management), ~97-110 requirements.
- Core artifacts: System Security Plan (SSP), Plan of Action and Milestones (POA&M).
- Assessment via SP 800-171A (examine/interview/test).
- Built on FIPS 200, supports tailoring and FedRAMP equivalence.
Why Organizations Use It
- Mandatory for federal contractors via DFARS 252.204-7012.
- Enables DoD contract eligibility, CMMC Level 2.
- Reduces breach risk, builds supply chain trust.
- Strategic for market access, resilience.
Implementation Overview
- Phased: scope CUI enclave, gap analysis, implement controls, evidence collection.
- Applies to contractors, subcontractors; all sizes via enclaves.
- Self/third-party assessments, SPRS scoring; no central certification.
WELL Details
What It Is
The 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 indoor environmental quality and organizational policies across new and existing buildings.
Key Components
- **10 core conceptsAir, Water, Nourishment, Light, Movement, Thermal Comfort, Sound, Materials, Mind, Community (plus Innovation).
- 24 Preconditions (mandatory pass/fail) and 102 Optimizations (point-earning).
- Built on public health research and building science.
- Certification tiers: Bronze (40 points), Silver (50), Gold (60), Platinum (80), with concept minimums at higher levels.
Why Organizations Use It
- Enhances occupant health, productivity, and ESG reporting.
- Differentiates assets via verified performance, supporting higher rents and retention.
- Mitigates risks like poor IEQ; complements LEED for holistic sustainability.
- Builds stakeholder trust through rigorous verification.
Implementation Overview
- Phased: gap analysis, scorecard, documentation, on-site verification, recertification every 3 years.
- Applies to offices, residential, portfolios globally.
- Requires third-party review and performance testing.
Key Differences
| Aspect | NIST 800-171 | WELL |
|---|---|---|
| Scope | CUI confidentiality in nonfederal systems | Occupant health and well-being in buildings |
| Industry | Defense contractors, federal supply chain | Real estate, offices, healthcare, all sectors |
| Nature | Contractual cybersecurity requirements | Voluntary performance-based certification |
| Testing | SP 800-171A assessments, CMMC audits | On-site performance verification, air/water tests |
| Penalties | Contract loss, DFARS ineligibility | No certification, no legal penalties |
Scope
Industry
Nature
Testing
Penalties
Frequently Asked Questions
Common questions about NIST 800-171 and WELL
NIST 800-171 FAQ
WELL FAQ
You Might also be Interested in These Articles...
SOC 2 for Fintech Startups: First 5 Steps to Compliance with Confidentiality Criterion Infographic
First 5 steps to SOC 2 compliance with Confidentiality for fintech SaaS. Infographic maps controls to risks like encryption & TPRM. Integrates GLBA/PCI DSS over
The 2026 Cyber Essentials Hybrid Audit Checklist: Gathering Unassailable Proof Across M365, AWS, and Azure
Build an evidence vault that passes Cyber Essentials Plus audits in 2026. Practical guidance on firewalls, secure configuration, and malware protection across M
NIST CSF 2.0: Key Enhancements and How They Address Evolving Cyber Threats
Explore NIST CSF 2.0 updates: Govern function, supply chain security, SME playbooks for ransomware & AI threats. Boost your cyber defenses now!
Run Maturity Assessments with GRADUM
Transform your compliance journey with our AI-powered assessment platform
Assess your organization's maturity across multiple standards and regulations including ISO 27001, DORA, NIS2, NIST, GDPR, and hundreds more. Get actionable insights and track your progress with collaborative, AI-powered evaluations.
Explore More Comparisons
See how NIST 800-171 and WELL compare against other standards