Chicago Building Energy Benchmarking: Annual Deadlines, Penalties, and the New CABO Requirements

You own a building over 50,000 square feet in Chicago? You're required to benchmark and report your energy use every year by June 1st. Miss the deadline and you're looking at a $100 initial violation plus $25 per day in ongoing penalties. That adds up to over $9,000 annually for a filing you could've completed in a few hours.

Chicago's Energy Benchmarking Ordinance has been around since 2013. This isn't new. But the city recently layered on the Clean & Affordable Buildings Ordinance, which adds performance requirements on top of reporting. If you're just benchmarking and ignoring the rest, you're missing the bigger picture.

What Is Chicago's Energy Benchmarking Ordinance?

The ordinance requires building owners to track and report energy use annually in ENERGY STAR Portfolio Manager. The goal is transparency. The city wants to know which buildings are efficient and which are energy hogs.

The law covers roughly 3,500 buildings across Chicago. If you own commercial or multifamily property over 50,000 square feet, you're in. The reporting is annual, the deadline is firm, and the penalties are automatic.

Who's Covered?

The threshold is 50,000 square feet of gross floor area. That's the total building footprint, not just rentable space. If you've got multiple buildings on a single parcel and they add up to 50,000 square feet or more, the city may require you to report them as a single property.

Covered building types include:

• Office buildings
• Multifamily residential (4+ units)
• Retail and commercial centers
• Hotels
• Warehouses and distribution
• Mixed-use properties

The owner is responsible for compliance. Not the property manager, not the tenant, not the HOA. You. If your name is on the deed, you're the one filing the report and paying the penalties if you don't.

Exemptions Are Rare

There are a few narrow exemptions:

• City-owned buildings
• Industrial manufacturing facilities
• Standalone parking structures

If you own a typical commercial or residential building, assume you're covered. Don't count on an exemption.

The June 1 Annual Deadline

Every year, you need to submit your benchmarking report by June 1st. The report covers the prior calendar year. So your June 2026 filing covers your 2025 energy use.

The data goes into ENERGY STAR Portfolio Manager, and you submit it to the city through their online portal. If you've never used Portfolio Manager before, expect a learning curve. It's not complicated, but it takes time to set up your building profile and input utility data correctly.

What You're Actually Reporting

The city requires you to report:

• Total electricity use (kWh)
• Natural gas use (therms)
• Any other fuel sources (steam, fuel oil, district energy, etc.)
• Building characteristics (size, type, operating hours, occupancy)

Portfolio Manager uses this data to calculate your building's Energy Use Intensity (EUI), which is measured in kBTU per square foot per year. Your EUI is the number that matters. It's how the city (and future tenants and buyers) will judge your building's efficiency.

The $25 Per Day Penalty

If you miss the June 1 deadline, the city hits you with an initial $100 violation, then $25 per day for each day it continues. That's $850 for a month, $9,225 for a full year.

The penalty is automatic. The city doesn't send you a grace period or a friendly reminder. You're late, you owe the initial fine plus $25 per day. Period.

And here's the part people miss: paying the fine doesn't eliminate your obligation to file. You still owe the report. So you're paying penalties AND you still need to do the work you should've done in the first place.

The Clean & Affordable Buildings Ordinance

Chicago didn't stop at benchmarking. In 2023, the city passed the Clean & Affordable Buildings Ordinance (CABO), which adds actual performance requirements on top of the reporting mandate.

CABO phases in performance standards for large buildings starting in 2026. If your building doesn't meet the efficiency targets, you'll need to make improvements or face escalating costs.

How CABO Works

Buildings will be subject to performance tiers based on their size and type. Larger buildings face earlier compliance deadlines. The targets are based on median EUI for each building category, similar to programs in NYC and DC.

If your building's EUI is above the target, you'll need to:

• Complete energy efficiency upgrades to bring your EUI below the target, or
• File a compliance plan showing how and when you'll meet the target, or
• Pay an alternative compliance fee (which will be expensive and escalate over time)

The city is still finalizing the exact targets and timelines, but expect them to mirror programs in other major cities. If you're in the bottom quartile of performance for your building type, you'll need to make significant improvements.

What Building Owners Should Do Now

Even if you're current on your benchmarking reports, you need to start thinking about CABO compliance. Here's your action plan.

1. Make Sure You're Current on Benchmarking

If you haven't filed your annual report yet, do it now. Don't wait until June. Get into Portfolio Manager, input your 2025 data, and submit the report to the city.

If you've never done this before, budget a few hours to set everything up. You'll need utility account numbers, building details, and access to 12 months of energy bills.

2. Understand Your EUI

Once you benchmark your building, look at your EUI score. How does it compare to similar buildings? If you're in the top 50% (lower EUI is better), you're probably fine for the initial CABO compliance periods.

If you're in the bottom 50%, you need to start planning improvements. Use our free compliance checker to see exactly where you stand.

3. Get an Energy Audit

A professional energy audit will tell you where your building is wasting energy and what improvements will have the biggest impact. Focus on ASHRAE Level 2 audits, which provide detailed cost/benefit analysis for each recommended measure.

Audits typically cost $0.10 to $0.30 per square foot. On a 100,000 square foot building, that's $10,000 to $30,000. Expensive, yes. But a good audit can identify $50,000+ in annual energy savings and keep you compliant with CABO.

4. Focus on Quick Wins

Not all efficiency measures require massive capital investment. Start with the low-hanging fruit:

• LED lighting: If you've still got fluorescent or incandescent bulbs anywhere, replace them. Payback periods of 1-3 years are typical.
• HVAC scheduling: Basic building automation and occupancy-based controls can cut energy use 10-20% with minimal cost.
• Air sealing: Gaps around windows, doors, and mechanical penetrations waste enormous amounts of energy. Cheap to fix, immediate impact.
• Steam trap maintenance: If your building uses steam heat, failed traps are a massive energy drain. Fixing them pays for itself in months.

5. Plan Major Projects Around CABO

If you're planning any big capital projects in the next 3-5 years (roof replacement, HVAC overhaul, façade work), build energy efficiency into the scope now. It's always cheaper to do it as part of a planned project than as a standalone retrofit.

6. Explore Utility Incentives

ComEd and Peoples Gas both offer rebate programs for energy efficiency upgrades. These can cover 20-50% of project costs for qualifying measures.

Check their websites, talk to your account reps, and apply early. Incentive programs always run out of money. The first applicants get funded, the late ones get waitlisted.

How Chicago's Requirements Compare to Other Cities

Chicago's benchmarking ordinance is relatively straightforward compared to programs in NYC, DC, or Boston. The penalties are lower, the thresholds are higher, and enforcement has historically been less aggressive.

But CABO changes that. With the addition of performance requirements, Chicago is joining the ranks of cities that actually enforce building efficiency, not just report it.

If you own buildings in multiple cities, you need to track compliance across all of them. Different deadlines, different thresholds, different penalties. That's exactly what BPS Check is built for: one tool that covers every major building performance standard in the country.

Public Disclosure and Market Pressure

Here's something owners often overlook: Chicago publishes all benchmarking data publicly. That means anyone can look up your building's energy performance. Tenants, buyers, brokers, lenders. Everyone.

If your building has a terrible EUI, that hurts leasing and resale value. Tenants are increasingly looking at sustainability metrics when choosing office space. Lenders are factoring energy performance into underwriting. A bad EUI isn't just a compliance problem. It's a market problem.

The Bottom Line

Chicago's benchmarking requirement has been around for over a decade, but a lot of building owners still treat it like an afterthought. That's a mistake. With CABO now layering on performance standards, the stakes are getting higher.

If you're current on benchmarking but you've never looked at your EUI or planned efficiency improvements, now's the time. The buildings that start early will have better access to incentives, contractors, and financing. The ones that wait will scramble.

Start today. File your benchmarking report if you haven't, understand your EUI, and figure out what improvements you need to make. Use our free compliance checker to see where you stand.