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Building Energy Benchmarking

Energy Benchmarking is the process of tracking a building's annual energy use and using a standard metric to compare the building's performance against past performance and to its peers nationwide. Benchmarking improves our understanding of energy consumption patterns; helps identify energy saving opportunities within a portfolio of buildings; and manages business bottom line through consistent data collection and tracking.

Building owners are required to benchmark the energy use of their nonresidential buildings 50,000 square feet and greater in the county in ENERGY STAR Portfolio Manager, and report it to the County for public disclosure.  


Explore More About Benchmarking:


Reporting Link for Calendar Year 2016 Data

Please use the blue-highlighted link below to submit your calendar year 2016 building energy benchmarking report to DEP. The submission deadline for all covered buildings (50,000 sq. ft. and greater) is Thursday, June 1st, 2017.

Verification Requirement Reminder: If this is your first year of reporting (Group 2 buildings: 50,000 sq. ft. up to 250,000 sq. ft.), please make sure your benchmarking data are verified by a Recognized Data Verifier before submitting to DEP. If you are a Group 1 building owner who submitted a 2015 benchmarking report, you are not required to verify your data this year. 

**Calendar Year 2016 Reporting Link for All Covered Buildings 50,000 Square Feet and Greater**

This link will take you to the ENERGY STAR Portfolio Manager account log-in screen—after logging in, you’ll see step-by-step instructions on the Data Request page.

Reporting Revisions to Calendar Year 2015 Data: If you need to amend your 2015 benchmarking report, please use this Calendar Year 2015 Reporting Link

Click Dropdowns to Learn More about Benchmarking:


Required Buildings & Deadlines

What is a Covered Building?

 A building covered under the Benchmarking Law is “any nonresidential building, or any group of buildings that have the same property identification number” that meet the square footage thresholds for the respective groups

Special Cases:

  • Multiple Buildings that Share a PIN/Tax ID: If you have a complex of buildings that share a property identification number (your Parcel ID or Tax ID), and their square footage adds up to the thresholds listed above, they are considered covered under this law (e.g., office campus with two buildings that are 30,000 square feet each and share a Tax ID).
  • A Building on Multiple Parcels: If you have a building that meets the thresholds, regardless of how many parcels or tax IDs or owners, the building is also considered covered under this law (e.g., shopping mall).


Building Groups and Deadlines:

There are three groups required to benchmark annually under the Benchmarking Law in Montgomery County.  

‚Äč*The Montgomery County law defines a covered building as a non-residential building, or any group of nonresidential buildings that have the same property identification number, that meet the given thresholds and criteria.


Covered Buildings List

DEP developed a preliminary Covered Buildings List to raise awareness about the Benchmarking Law (last updated November 2016). This list was created with current Maryland tax assessment records and the CoStar commercial building database.

Note: This inventory is an approximation, meant to raise awareness about the law and help identify the buildings covered by the law.  Each building owner will need to confirm their own building square footage to determine coverage under the law.

Compliance is dependent upon the building owner’s record of their building square footage and the square footage on the parcel in total, regardless of the information on this inventory. This inventory will be used only as a tool by DEP, and should be considered the same by building owners and other stakeholders.


Need help figuring out your tax parcel?

Use the online GIS map created from current Maryland tax assessment records to locate the parcel that your building sits on, and see what other buildings share your parcel. Reminder: if your building shares a parcel with other buildings and collectively add up to 50,000 square feet and greater, you'll need to report benchmarking data to DEP.




Summary of the Benchmarking Law

In May 2014, the Montgomery County adopted a  Building Benchmarking Law ( PDF, 580 KB) and amended the original legislation by  Bill 35-15 Environmental Sustainability – Benchmarking – Amendments in November 2015, which requires the County and building owners to:

  • Benchmark the energy use of their nonresidential buildings 50,000 square feet and greater in the county in ENERGY STAR Portfolio Manager,
  • Have those data verified by a Recognized Data Verifier the first year and every three years thereafter, and
  • Report data to the County annually for public disclosure.

The County has led by example by benchmarking its buildings first by June 2015. The first deadline for private buildings is June 2016. The  Department of Environmental Protection (DEP) is responsible for the implementation of this law.

Download the Montgomery County Benchmarking Brochure: Building Energy Benchmarking Law: What you need to know about the law and how to get started ( PDF, 1.1 MB).


Benchmarking Help

Stay Up to Date on Benchmarking News

Sign-up for the Commercial Energy News, a newsletter that includes all of the Benchmarking Law updates, as well as Commercial PACE financing news, green building news, and commercial energy events.

We also have a  Montgomery County Energy Benchmarking  Google Group for our community of building owners to ask questions about the Benchmarking Law, share lessons learned, and access resources. 


Upcoming Office Hours

Join DEP on the third Tuesday of each month at our offices at 255 Rockville Pike right off of the Rockville Metro to answer all of your benchmarking questions! Please RSVP to
  • June 20 th – 2-4 pm


Word collage of benchmarking and energy terms



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