Colorado Regulation 28 is not a voluntary program. Starting January 1, 2030, buildings that fail to meet compliance deadlines face escalating penalties that accumulate quickly. Understanding the penalty structure and enforcement timeline is critical to your compliance strategy—waiting costs real money.
Regulation 28’s Three-Phase Enforcement Timeline
The regulation distinguishes between three enforcement phases:
Phase 1: 2023–2026 (Benchmarking and Compliance Pathway Phase)
CDPHE’s focus is on data collection and pathway documentation. Penalties during this phase are focused on benchmarking submission:
- Failure to submit annual benchmarking data: Up to $577 for first violation; $2,300 for subsequent violations per CDPHE Air Quality Control Commission civil rules
Phase 2: 2026/2027–2029 (Compliance Ramp-Up)
Buildings must meet their performance targets by December 31, 2026 (100,000+ sq ft buildings) or December 31, 2027 (50,000–99,999 sq ft buildings). If you miss these deadlines, penalties don’t activate immediately—there’s a transition period.
Phase 3: 2030+ (Full Enforcement)
Starting January 1, 2030, the full penalty structure applies. This is when non-compliant buildings face the steepest consequences.
The Full Penalty Structure
Benchmarking Violations
If a building fails to submit required benchmarking data by November 1:
| Violation Type | First Offense | Second+ Offense |
|---|---|---|
| Benchmarking failure | Up to $577 | Up to $2,300 |
A single missed benchmarking deadline carries a modest but non-zero penalty. Multiple years of missed benchmarking can accumulate to $10,000+ in fines.
Performance Non-Compliance Violations (2030+)
Once enforcement begins in 2030, buildings that haven’t achieved their required performance targets face much steeper penalties:
| Violation Type | Per-Period Penalty (30 days) |
|---|---|
| First performance violation | Up to $2,300 |
| Subsequent violations | Up to $5,800 |
Critical point: The penalty structure is per 30-day period, not per year. This means:
- A building non-compliant for 1 month = $2,300–$5,800
- A building non-compliant for 12 months = $27,600–$69,600
- A building non-compliant for 24 months = $55,200–$139,200
Real-World Penalty Scenarios
Scenario 1: Large Office Building in Denver (100,000+ sq ft)
- Misses the December 31, 2026 compliance deadline
- January 2030 arrives; building is still non-compliant
- CDPHE issues first violation: $2,300 for January–February 2030
- Building secures ECM budget and timeline to compliance by June 2030
- Total penalties: $2,300 × 4 periods (Jan–Dec 2029, Jan–Feb 2030) = $9,200
But if that same building remains non-compliant through 2030 and into 2031:
- Violations from January 2030–December 2031 (24 months) at $2,300–$5,800 per month (30-day periods)
- Conservative estimate: $55,200–$139,200 in penalties alone
Scenario 2: Multifamily Complex in Fort Collins (75,000 sq ft)
- 50,000–99,999 sq ft building; compliance deadline is December 31, 2027
- Misses that deadline; doesn’t achieve compliance until late 2031
- January 2030–December 2031: 24 months of violations
- At $2,300 minimum per 30-day period: $55,200 in fines
- Plus utility costs of ECM implementation: $40,000–$80,000
- Total cost of delay: $95,200–$135,200
The Enforcement Process
CDPHE’s enforcement doesn’t happen overnight. Here’s how it typically proceeds:
Step 1: Benchmarking Review (2026–2027)
Each November, CDPHE compares submitted benchmarking data against its records. Buildings with missing or incomplete submissions are flagged.
Step 2: Pathway Assessment (2026–2029)
CDPHE compares each building’s projected performance against its stated pathway. A building claiming “we’ll achieve 13% EUI reduction by 2026” but showing flat or increasing energy use is flagged for follow-up.
Step 3: Compliance Determination (2028–2030)
By December 31, 2026 and 2027, CDPHE formally determines which buildings are compliant. Non-compliant buildings are notified.
Step 4: Penalty Notice (January 2030+)
CDPHE issues formal violation notices to non-compliant buildings. Violations are typically grouped into 30-day periods, with each period a separate violation for penalty calculation purposes.
Step 5: Administrative Appeal (Optional)
Buildings may challenge the violation through Colorado’s administrative procedure rules. Appeals delay but do not eliminate penalties.
Step 6: Enforcement Action (if penalties aren’t paid)
CDPHE can pursue civil enforcement, liens, and collection. In practice, penalties tend to motivate building owners to comply far faster than negotiations.
Additional Costs Beyond Penalties
Penalties are just the tip of the iceberg. Non-compliant buildings face:
- Remediation Costs: Energy improvements to achieve compliance (lighting, HVAC, controls, renewable energy) typically cost $15–$50 per sq ft depending on scope
- Accelerated Timeline: Rushed implementation is more expensive than planned, phased improvements
- Opportunity Cost: Budget allocated to penalties and emergency retrofits can’t be deployed elsewhere
- Reputational Risk: Non-compliance becomes part of your building’s record and public disclosure (CDPHE maintains a public registry)
- Financing Impacts: Some lenders view Regulation 28 non-compliance as a credit risk
Building Decarbonization Enterprise Fee
Independent of penalties, all covered buildings (100,000+ sq ft) must pay an annual Building Decarbonization Enterprise Fee starting in 2025. This is separate from compliance penalties.
The fee structure has not been finalized as of early 2026, but initial guidance indicates:
- Anticipated range: $0.05–$0.10 per square foot per year
- For a 100,000 sq ft building: $5,000–$10,000 annually
- Fee revenue funds CDPHE’s compliance programs and building owner rebates
This is not optional or penalty-based—it’s an annual assessment on all covered buildings regardless of compliance status.
The 2030 Ratchet: Phase 2 Targets
Even if a building achieves compliance by 2026/2027, Phase 2 targets (2030+) are stricter:
- Percent reduction pathways: Must achieve 29% reduction (vs. 13% by 2026)
- EUI/GHG targets: CDPHE has indicated targets may be tightened; official guidance is expected in 2027
Buildings that defer compliance beyond 2026/2027 will face steeper 2030 targets on top of accumulated penalty exposure.
How to Avoid Penalties: The Action Plan
- Benchmark immediately: Get 2021 baseline data into ENERGY STAR Portfolio Manager now.
- Commission an energy audit: Identify which pathway is achievable for your building by spring 2026.
- Select and document your pathway: Make a formal declaration by summer 2026.
- Meet your performance deadline: December 31, 2026 (100,000+ sq ft) or December 31, 2027 (50,000–99,999 sq ft).
- Plan Phase 2 improvements: Target the 29% reduction needed by 2030; don’t wait until 2029 to start.
For buildings that have already missed the 2026/2027 deadline, the calculus is different—every month of non-compliance now adds $2,300+ in penalties. Immediate remediation often costs less than continued non-compliance.
Example Cost Comparison: Comply Now vs. Later
Building Profile: 80,000 sq ft retail in Colorado Springs
Option A: Achieve Compliance by December 31, 2027 (On Time)
- Energy audit cost: $10,000
- ECM implementation: $50,000–$100,000 (over 18–24 months)
- No penalties
- Utility incentives available: $20,000–$40,000
- Net cost: $20,000–$70,000
Option B: Miss 2027 Deadline, Comply by End of 2029 (24-Month Delay)
- Energy audit cost: $10,000
- ECM implementation: $50,000–$100,000 (compressed timeline = 20% more expensive)
- CDPHE penalties (2030–2029, 24 months): $55,200–$69,600
- Utility incentives (reduced due to delayed enrollment): $10,000–$20,000
- Net cost: $105,200–$149,600
Cost of noncompliance: $85,200–$79,600 more
The case for on-time compliance is financial, not just regulatory.
Bottom Line
Regulation 28’s penalty structure is designed to incentivize compliance by the 2026/2027 deadlines. Buildings that comply on schedule pay for audits and improvements. Buildings that delay pay for audits, improvements, and penalties that quickly exceed the cost of timely action.
If your building is on track for compliance by your deadline, stay the course. If you’re behind, engaging now to develop a remediation plan saves money and stress compared to waiting until enforcement begins in 2030.
The December 2026/2027 deadlines are fixed. CDPHE has not granted extensions historically, and the regulation’s statutory language provides no extension mechanism.
Next step: If you haven’t started benchmarking or you’re unsure of your compliance pathway, now is the time to engage an energy consultant. The cost of guidance is a fraction of the cost of penalties.