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Oak Park, IL · Reviewed November 2026

Oak Park benchmarking compliance, filed for you

The Oak Park Energy & Water Benchmarking Ordinance requires covered buildings to report energy and water use every year. We gather the data, check it, and file it — usually within a week.

Who’s covered

Buildings of 10,000 sq ft or more covered by the village ordinance (starting with village-owned buildings; larger private buildings are being phased in — we’ll confirm for your property).

Annual deadline

December 31 for the previous calendar year.

Verification

No routine third-party verification — but the program runs its own data checks, so accuracy still matters.

Penalties

Daily fines of up to $750.

What to report

All energy and water used by the whole building — including tenant spaces — for January 1 to December 31:

  • Electricity — every meter serving the building
  • Natural gas
  • District steam, hot or chilled water, if you have it
  • Delivered fuels (oil, diesel, propane) — all delivery receipts for the year
  • On-site solar production, if any
  • Water — whole-building water use

Leave out backup generator fuel. Note any meters added or removed during the year.

Good to know

  • Oak Park adopted its ordinance in 2023.

What we’ll need from you

  • Building address, plus any utility service addresses that differ from it
  • Gross floor area for the whole building and each use (office, retail, residential…), number of units and year built
  • Your Oak Park Building ID (we can look it up)
  • Utility data for the full calendar year, January 1 – December 31 (usually 13 months of bills)
  • If tenants pay their own utilities: whole-building (aggregated) data from the utility, or signed tenant authorization forms
  • Access to your ENERGY STAR Portfolio Manager account, if you have one
  • Any notice or letter you received about this law
FAQ

Oak Park benchmarking questions

When is the Oak Park benchmarking deadline?
Reports are normally due December 31 each year, covering the previous calendar year’s energy and water use.
Does Oak Park benchmarking apply to my building?
Buildings of 10,000 sq ft or more covered by the village ordinance (starting with village-owned buildings; larger private buildings are being phased in — we’ll confirm for your property). Exemptions are limited — if you’re not sure, send us the address and we’ll check.
What happens if I miss it?
Daily fines of up to $750. If you’ve already missed the deadline, we can usually get you filed quickly and help you respond to any notice.

Official program information: Oak Park benchmarking website. Requirements change — we confirm current rules for every filing.

Let us handle your Oak Park benchmarking filing

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