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Citadel Center 131 S Dearborn St
6,018 - 584,118 SF of 5-Star Office Space Available in Chicago, IL 60603
Highlights
- 13’4” exposed ceiling height with 9’6” finished ceiling + window height
- 10-12 watts of electrical capacity per square foot with 3 separate ComEd substations
- 180+ seat conference room, bike storage, 210 indoor and heated parking spaces, as well as a Starbucks in building
- 14” raised plenum that houses air, wiring, and cabling
- Amenities include an outdoor bar and roof deck, tenant lounge, complimentary 10,000 SF professionally managed fitness center that’s available 24/7
- LEED Gold
all available spaces(19)
Display Rental Rate as
- Space
- Size
- Term
- Rental Rate
- Space Use
- Condition
- Available
Former Convene conferencing space.
- Fully Built-Out as Standard Office
- Conference Rooms
- Central Air Conditioning
- Mostly Open Floor Plan Layout
- Space is in Excellent Condition
Former Convene conferencing space.
- Fully Built-Out as Standard Office
- Space is in Excellent Condition
- Offers a large floor plan.
- Mostly Open Floor Plan Layout
- Central Air Conditioning
available 1/1/26
- Open Floor Plan Layout
- Open-Plan
- Can be combined with additional space(s) for up to 126,611 SF of adjacent space
- Offers a large open floor plan.
- Lease rate does not include certain property expenses
- Mostly Open Floor Plan Layout
- Central Air Conditioning
- Fully Built-Out as Standard Office
- Can be combined with additional space(s) for up to 126,611 SF of adjacent space
- Lease rate does not include certain property expenses
- Open Floor Plan Layout
- Open-Plan
- Fully Built-Out as Standard Office
- Space is in Excellent Condition
- Lease rate does not include certain property expenses
- Finished Ceilings: 9’6”
- Lease rate does not include certain property expenses
- Open-Plan
- Open Floor Plan Layout
Mostly Open Plan
- Lease rate does not include certain property expenses
- Open Floor Plan Layout
- Open-Plan
- Fully Built-Out as Standard Office
- Space is in Excellent Condition
Former Convene co-working space.
- Lease rate does not include certain property expenses
- 3 Conference Rooms
- Central Air and Heating
- Features 10 phone rooms.
- Fully Built-Out as Standard Office
- Space is in Excellent Condition
- Print/Copy Room
Former Perkins Coie space, 32 private offices – 21 of which are located on the perimeter.
- Lease rate does not include certain property expenses
- 32 Private Offices
- Can be combined with additional space(s) for up to 90,101 SF of adjacent space
- Offers 32 private offices.
- Fully Built-Out as Law Office
- Space is in Excellent Condition
- Central Air and Heating
Former Convene co-working space.
- Lease rate does not include certain property expenses
- Space is in Excellent Condition
- Fully Built-Out as Standard Office
- Lease rate does not include certain property expenses
- 13 Private Offices
- Space is in Excellent Condition
- Central Air and Heating
- Partially Built-Out as Law Office
- 3 Conference Rooms
- Can be combined with additional space(s) for up to 90,101 SF of adjacent space
- Offers 3 conference rooms.
Brand new spec suite delivered February 2023. 12 private offices, 164 workstations, 8 conference rooms, 12 huddle rooms, and 8 focus rooms. Ability to demise down into 3 suites -- 17,193 RSF, 8,516 RSF, and 8,445 RSF.
- Lease rate does not include certain property expenses
- 12 Private Offices
- 164 Workstations
- Can be combined with additional space(s) for up to 90,101 SF of adjacent space
- Mostly Open Floor Plan Layout
- 8 Conference Rooms
- High End Trophy Space
- Central Air and Heating
Former Perkins Coie space. It’s in really good shape, but just needs some cosmetic updates. 55 offices, 9 conference rooms and no existing workstations.
- Lease rate does not include certain property expenses
- 55 Private Offices
- Can be combined with additional space(s) for up to 90,101 SF of adjacent space
- 9 conference rooms are available.
- Fully Built-Out as Law Office
- 9 Conference Rooms
- Central Air and Heating
space is in raw condition.
- Open Floor Plan Layout
- Open-Plan
- Space In Need of Renovation
Currently white-boxed marketing center.
- Lease rate does not include certain property expenses
- Central Air and Heating
- Can be combined with additional space(s) for up to 67,983 SF of adjacent space
- Lease rate does not include certain property expenses
- Space is in Excellent Condition
- Central Air and Heating
- Fully Built-Out as Standard Office
- Can be combined with additional space(s) for up to 67,983 SF of adjacent space
- Lease rate does not include certain property expenses
- Space is in Excellent Condition
- Large floor plan.
- Fully Built-Out as Standard Office
- Central Air and Heating
- Lease rate does not include certain property expenses
- Space is in Excellent Condition
- Large floor plan.
- Fully Built-Out as Standard Office
- Central Air and Heating
Space | Size | Term | Rental Rate | Space Use | Condition | Available |
1st Floor, Ste 100 | 11,929 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Full Build-Out | Now |
2nd Floor, Ste 250 | 36,934 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Full Build-Out | Now |
4th Floor, Ste 400 | 64,311 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | - | January 01, 2026 |
5th Floor, Ste 500 | 62,300 SF | Negotiable | $25.00 /SF/YR $2.08 /SF/MO $1,557,500 /YR $129,792 /MO | Office | Full Build-Out | Now |
9th Floor, Ste 900 | 64,041 SF | Negotiable | $25.00 /SF/YR $2.08 /SF/MO $1,601,025 /YR $133,419 /MO | Office | Full Build-Out | 30 Days |
10th Floor, Ste 1050 | 29,803-31,990 SF | Negotiable | $26.00 /SF/YR $2.17 /SF/MO $831,740 /YR $69,312 /MO | Office | Shell Space | Now |
11th Floor, Ste 1100 | 17,201 SF | Negotiable | $25.00 /SF/YR $2.08 /SF/MO $430,025 /YR $35,835 /MO | Office | - | 30 Days |
11th Floor, Ste 1150 | 12,451 SF | Negotiable | $25.00 /SF/YR $2.08 /SF/MO $311,275 /YR $25,940 /MO | Office | Full Build-Out | 30 Days |
14th Floor, Ste 1400 | 34,180 SF | Negotiable | $25.00 /SF/YR $2.08 /SF/MO $854,500 /YR $71,208 /MO | Office | Full Build-Out | Now |
15th Floor, Ste 1500 | 16,817 SF | Negotiable | $28.00 /SF/YR $2.33 /SF/MO $470,876 /YR $39,240 /MO | Office | Full Build-Out | Now |
15th Floor, Ste 1550 | 14,450 SF | Negotiable | $25.00 /SF/YR $2.08 /SF/MO $361,250 /YR $30,104 /MO | Office | Full Build-Out | Now |
16th Floor, Ste 1650 | 6,018 SF | Negotiable | $28.00 /SF/YR $2.33 /SF/MO $168,504 /YR $14,042 /MO | Office | Partial Build-Out | Now |
17th Floor, Ste 1700 | 33,633 SF | Negotiable | $28.00 /SF/YR $2.33 /SF/MO $941,724 /YR $78,477 /MO | Office | Spec Suite | Now |
18th Floor, Ste 1800 | 33,633 SF | Negotiable | $28.00 /SF/YR $2.33 /SF/MO $941,724 /YR $78,477 /MO | Office | Full Build-Out | Now |
21st Floor, Ste 2150 | 7,730 SF | Negotiable | Upon Request Upon Request Upon Request Upon Request | Office | Shell Space | 30 Days |
25th Floor, Ste 2500 | 33,923 SF | Negotiable | $35.00 /SF/YR $2.92 /SF/MO $1,187,305 /YR $98,942 /MO | Office | Shell Space | Now |
26th Floor, Ste 2600 | 34,060 SF | Negotiable | $35.00 /SF/YR $2.92 /SF/MO $1,192,100 /YR $99,342 /MO | Office | Full Build-Out | 30 Days |
27th Floor, Ste 2700 | 33,725 SF | Negotiable | $32.50 /SF/YR $2.71 /SF/MO $1,096,063 /YR $91,339 /MO | Office | Full Build-Out | Now |
35th Floor, Ste 3500 | 34,792 SF | Negotiable | $35.00 /SF/YR $2.92 /SF/MO $1,217,720 /YR $101,477 /MO | Office | Full Build-Out | Now |
1st Floor, Ste 100
Size |
11,929 SF |
Term |
Negotiable |
Rental Rate |
Upon Request Upon Request Upon Request Upon Request |
Space Use |
Office |
Condition |
Full Build-Out |
Available |
Now |
2nd Floor, Ste 250
Size |
36,934 SF |
Term |
Negotiable |
Rental Rate |
Upon Request Upon Request Upon Request Upon Request |
Space Use |
Office |
Condition |
Full Build-Out |
Available |
Now |
4th Floor, Ste 400
Size |
64,311 SF |
Term |
Negotiable |
Rental Rate |
Upon Request Upon Request Upon Request Upon Request |
Space Use |
Office |
Condition |
- |
Available |
January 01, 2026 |
5th Floor, Ste 500
Size |
62,300 SF |
Term |
Negotiable |
Rental Rate |
$25.00 /SF/YR $2.08 /SF/MO $1,557,500 /YR $129,792 /MO |
Space Use |
Office |
Condition |
Full Build-Out |
Available |
Now |
9th Floor, Ste 900
Size |
64,041 SF |
Term |
Negotiable |
Rental Rate |
$25.00 /SF/YR $2.08 /SF/MO $1,601,025 /YR $133,419 /MO |
Space Use |
Office |
Condition |
Full Build-Out |
Available |
30 Days |
10th Floor, Ste 1050
Size |
29,803-31,990 SF |
Term |
Negotiable |
Rental Rate |
$26.00 /SF/YR $2.17 /SF/MO $831,740 /YR $69,312 /MO |
Space Use |
Office |
Condition |
Shell Space |
Available |
Now |
11th Floor, Ste 1100
Size |
17,201 SF |
Term |
Negotiable |
Rental Rate |
$25.00 /SF/YR $2.08 /SF/MO $430,025 /YR $35,835 /MO |
Space Use |
Office |
Condition |
- |
Available |
30 Days |
11th Floor, Ste 1150
Size |
12,451 SF |
Term |
Negotiable |
Rental Rate |
$25.00 /SF/YR $2.08 /SF/MO $311,275 /YR $25,940 /MO |
Space Use |
Office |
Condition |
Full Build-Out |
Available |
30 Days |
14th Floor, Ste 1400
Size |
34,180 SF |
Term |
Negotiable |
Rental Rate |
$25.00 /SF/YR $2.08 /SF/MO $854,500 /YR $71,208 /MO |
Space Use |
Office |
Condition |
Full Build-Out |
Available |
Now |
15th Floor, Ste 1500
Size |
16,817 SF |
Term |
Negotiable |
Rental Rate |
$28.00 /SF/YR $2.33 /SF/MO $470,876 /YR $39,240 /MO |
Space Use |
Office |
Condition |
Full Build-Out |
Available |
Now |
15th Floor, Ste 1550
Size |
14,450 SF |
Term |
Negotiable |
Rental Rate |
$25.00 /SF/YR $2.08 /SF/MO $361,250 /YR $30,104 /MO |
Space Use |
Office |
Condition |
Full Build-Out |
Available |
Now |
16th Floor, Ste 1650
Size |
6,018 SF |
Term |
Negotiable |
Rental Rate |
$28.00 /SF/YR $2.33 /SF/MO $168,504 /YR $14,042 /MO |
Space Use |
Office |
Condition |
Partial Build-Out |
Available |
Now |
17th Floor, Ste 1700
Size |
33,633 SF |
Term |
Negotiable |
Rental Rate |
$28.00 /SF/YR $2.33 /SF/MO $941,724 /YR $78,477 /MO |
Space Use |
Office |
Condition |
Spec Suite |
Available |
Now |
18th Floor, Ste 1800
Size |
33,633 SF |
Term |
Negotiable |
Rental Rate |
$28.00 /SF/YR $2.33 /SF/MO $941,724 /YR $78,477 /MO |
Space Use |
Office |
Condition |
Full Build-Out |
Available |
Now |
21st Floor, Ste 2150
Size |
7,730 SF |
Term |
Negotiable |
Rental Rate |
Upon Request Upon Request Upon Request Upon Request |
Space Use |
Office |
Condition |
Shell Space |
Available |
30 Days |
25th Floor, Ste 2500
Size |
33,923 SF |
Term |
Negotiable |
Rental Rate |
$35.00 /SF/YR $2.92 /SF/MO $1,187,305 /YR $98,942 /MO |
Space Use |
Office |
Condition |
Shell Space |
Available |
Now |
26th Floor, Ste 2600
Size |
34,060 SF |
Term |
Negotiable |
Rental Rate |
$35.00 /SF/YR $2.92 /SF/MO $1,192,100 /YR $99,342 /MO |
Space Use |
Office |
Condition |
Full Build-Out |
Available |
30 Days |
27th Floor, Ste 2700
Size |
33,725 SF |
Term |
Negotiable |
Rental Rate |
$32.50 /SF/YR $2.71 /SF/MO $1,096,063 /YR $91,339 /MO |
Space Use |
Office |
Condition |
Full Build-Out |
Available |
Now |
35th Floor, Ste 3500
Size |
34,792 SF |
Term |
Negotiable |
Rental Rate |
$35.00 /SF/YR $2.92 /SF/MO $1,217,720 /YR $101,477 /MO |
Space Use |
Office |
Condition |
Full Build-Out |
Available |
Now |
1st Floor, Ste 100
Size | 11,929 SF |
Term | Negotiable |
Rental Rate | Upon Request |
Space Use | Office |
Condition | Full Build-Out |
Available | Now |
Former Convene conferencing space.
- Fully Built-Out as Standard Office
- Mostly Open Floor Plan Layout
- Conference Rooms
- Space is in Excellent Condition
- Central Air Conditioning
2nd Floor, Ste 250
Size | 36,934 SF |
Term | Negotiable |
Rental Rate | Upon Request |
Space Use | Office |
Condition | Full Build-Out |
Available | Now |
Former Convene conferencing space.
- Fully Built-Out as Standard Office
- Mostly Open Floor Plan Layout
- Space is in Excellent Condition
- Central Air Conditioning
- Offers a large floor plan.
4th Floor, Ste 400
Size | 64,311 SF |
Term | Negotiable |
Rental Rate | Upon Request |
Space Use | Office |
Condition | - |
Available | January 01, 2026 |
available 1/1/26
- Open Floor Plan Layout
- Can be combined with additional space(s) for up to 126,611 SF of adjacent space
- Open-Plan
- Offers a large open floor plan.
5th Floor, Ste 500
Size | 62,300 SF |
Term | Negotiable |
Rental Rate | $25.00 /SF/YR |
Space Use | Office |
Condition | Full Build-Out |
Available | Now |
- Lease rate does not include certain property expenses
- Fully Built-Out as Standard Office
- Mostly Open Floor Plan Layout
- Can be combined with additional space(s) for up to 126,611 SF of adjacent space
- Central Air Conditioning
9th Floor, Ste 900
Size | 64,041 SF |
Term | Negotiable |
Rental Rate | $25.00 /SF/YR |
Space Use | Office |
Condition | Full Build-Out |
Available | 30 Days |
- Lease rate does not include certain property expenses
- Fully Built-Out as Standard Office
- Open Floor Plan Layout
- Space is in Excellent Condition
- Open-Plan
10th Floor, Ste 1050
Size | 29,803-31,990 SF |
Term | Negotiable |
Rental Rate | $26.00 /SF/YR |
Space Use | Office |
Condition | Shell Space |
Available | Now |
- Lease rate does not include certain property expenses
- Finished Ceilings: 9’6”
11th Floor, Ste 1100
Size | 17,201 SF |
Term | Negotiable |
Rental Rate | $25.00 /SF/YR |
Space Use | Office |
Condition | - |
Available | 30 Days |
- Lease rate does not include certain property expenses
- Open Floor Plan Layout
- Open-Plan
11th Floor, Ste 1150
Size | 12,451 SF |
Term | Negotiable |
Rental Rate | $25.00 /SF/YR |
Space Use | Office |
Condition | Full Build-Out |
Available | 30 Days |
Mostly Open Plan
- Lease rate does not include certain property expenses
- Fully Built-Out as Standard Office
- Open Floor Plan Layout
- Space is in Excellent Condition
- Open-Plan
14th Floor, Ste 1400
Size | 34,180 SF |
Term | Negotiable |
Rental Rate | $25.00 /SF/YR |
Space Use | Office |
Condition | Full Build-Out |
Available | Now |
Former Convene co-working space.
- Lease rate does not include certain property expenses
- Fully Built-Out as Standard Office
- 3 Conference Rooms
- Space is in Excellent Condition
- Central Air and Heating
- Print/Copy Room
- Features 10 phone rooms.
15th Floor, Ste 1500
Size | 16,817 SF |
Term | Negotiable |
Rental Rate | $28.00 /SF/YR |
Space Use | Office |
Condition | Full Build-Out |
Available | Now |
Former Perkins Coie space, 32 private offices – 21 of which are located on the perimeter.
- Lease rate does not include certain property expenses
- Fully Built-Out as Law Office
- 32 Private Offices
- Space is in Excellent Condition
- Can be combined with additional space(s) for up to 90,101 SF of adjacent space
- Central Air and Heating
- Offers 32 private offices.
15th Floor, Ste 1550
Size | 14,450 SF |
Term | Negotiable |
Rental Rate | $25.00 /SF/YR |
Space Use | Office |
Condition | Full Build-Out |
Available | Now |
Former Convene co-working space.
- Lease rate does not include certain property expenses
- Fully Built-Out as Standard Office
- Space is in Excellent Condition
16th Floor, Ste 1650
Size | 6,018 SF |
Term | Negotiable |
Rental Rate | $28.00 /SF/YR |
Space Use | Office |
Condition | Partial Build-Out |
Available | Now |
- Lease rate does not include certain property expenses
- Partially Built-Out as Law Office
- 13 Private Offices
- 3 Conference Rooms
- Space is in Excellent Condition
- Can be combined with additional space(s) for up to 90,101 SF of adjacent space
- Central Air and Heating
- Offers 3 conference rooms.
17th Floor, Ste 1700
Size | 33,633 SF |
Term | Negotiable |
Rental Rate | $28.00 /SF/YR |
Space Use | Office |
Condition | Spec Suite |
Available | Now |
Brand new spec suite delivered February 2023. 12 private offices, 164 workstations, 8 conference rooms, 12 huddle rooms, and 8 focus rooms. Ability to demise down into 3 suites -- 17,193 RSF, 8,516 RSF, and 8,445 RSF.
- Lease rate does not include certain property expenses
- Mostly Open Floor Plan Layout
- 12 Private Offices
- 8 Conference Rooms
- 164 Workstations
- High End Trophy Space
- Can be combined with additional space(s) for up to 90,101 SF of adjacent space
- Central Air and Heating
18th Floor, Ste 1800
Size | 33,633 SF |
Term | Negotiable |
Rental Rate | $28.00 /SF/YR |
Space Use | Office |
Condition | Full Build-Out |
Available | Now |
Former Perkins Coie space. It’s in really good shape, but just needs some cosmetic updates. 55 offices, 9 conference rooms and no existing workstations.
- Lease rate does not include certain property expenses
- Fully Built-Out as Law Office
- 55 Private Offices
- 9 Conference Rooms
- Can be combined with additional space(s) for up to 90,101 SF of adjacent space
- Central Air and Heating
- 9 conference rooms are available.
21st Floor, Ste 2150
Size | 7,730 SF |
Term | Negotiable |
Rental Rate | Upon Request |
Space Use | Office |
Condition | Shell Space |
Available | 30 Days |
space is in raw condition.
- Open Floor Plan Layout
- Space In Need of Renovation
- Open-Plan
25th Floor, Ste 2500
Size | 33,923 SF |
Term | Negotiable |
Rental Rate | $35.00 /SF/YR |
Space Use | Office |
Condition | Shell Space |
Available | Now |
Currently white-boxed marketing center.
- Lease rate does not include certain property expenses
- Can be combined with additional space(s) for up to 67,983 SF of adjacent space
- Central Air and Heating
26th Floor, Ste 2600
Size | 34,060 SF |
Term | Negotiable |
Rental Rate | $35.00 /SF/YR |
Space Use | Office |
Condition | Full Build-Out |
Available | 30 Days |
- Lease rate does not include certain property expenses
- Fully Built-Out as Standard Office
- Space is in Excellent Condition
- Can be combined with additional space(s) for up to 67,983 SF of adjacent space
- Central Air and Heating
27th Floor, Ste 2700
Size | 33,725 SF |
Term | Negotiable |
Rental Rate | $32.50 /SF/YR |
Space Use | Office |
Condition | Full Build-Out |
Available | Now |
- Lease rate does not include certain property expenses
- Fully Built-Out as Standard Office
- Space is in Excellent Condition
- Central Air and Heating
- Large floor plan.
35th Floor, Ste 3500
Size | 34,792 SF |
Term | Negotiable |
Rental Rate | $35.00 /SF/YR |
Space Use | Office |
Condition | Full Build-Out |
Available | Now |
- Lease rate does not include certain property expenses
- Fully Built-Out as Standard Office
- Space is in Excellent Condition
- Central Air and Heating
- Large floor plan.
Property Overview
Designed by world-renowned Spanish architect, Ricardo Bofill, 131 South Dearborn features an elegant architectural steel and reflective glass curtain wall that stands in stark relief against the vintage masonry and brooding anodized bronze facades adorned by its neighboring buildings. Evocative of a classical column with a heavy base, the 37-story building is capped by an articulated cornice that ascends above an illuminated, 30’-tall lobby. The podium includes an 11-story bustle, which expands the typical 34,000 SF floor plate to a sprawling 64,000 SF within the low-rise. This robust base stretches 131’s retail footprint by a full block to the famed State Street shopping corridor. An uncommon combination of architectural grace and infrastructural brawn, 131 South Dearborn is as relevant today as it was when it opened in 2003. 131 South Dearborn is still Chicago’s most state-of-the-art office building, boasting an unrivaled base building infrastructure highlighted by the market’s only 14-inch raised floor system. A floor at 131 South Dearborn is taller than a conventional building due to the generous 14’6” slab-to-slab height. In fact, the building’s 37th floor penthouse is equivalent to the height of a typical building’s 40th floor. 131 South Dearborn is one of only three buildings in Chicago that incorporates a raised floor system (and the only building with a 14” pedestal) designed to house wiring, communications and an underfloor air distribution system. Located on Adams Street between Dearborn and State Streets in the heart of Chicago’s Central Loop, 131 South Dearborn is proximate to all forms of commutation, recreation, culture and nightlife the CBD affords. 131 South Dearborn boasts an extensive offering of recently enhanced on-site amenities, including a newly updated all seasons space, outdoor lounge & athletic club.
- Atrium
- Banking
- Bus Line
- Controlled Access
- Commuter Rail
- Property Manager on Site
- Signage
- LEED Certified - Gold
- Energy Star Labeled
PROPERTY FACTS
Sustainability
Sustainability
LEED Certification Developed by the U.S. Green Building Council (USGBC), the Leadership in Energy and Environmental Design (LEED) is a green building certification program focused on the design, construction, operation, and maintenance of green buildings, homes, and neighborhoods, which aims to help building owners and operators be environmentally responsible and use resources efficiently. LEED certification is a globally recognized symbol of sustainability achievement and leadership. To achieve LEED certification, a project earns points by adhering to prerequisites and credits that address carbon, energy, water, waste, transportation, materials, health and indoor environmental quality. Projects go through a verification and review process and are awarded points that correspond to a level of LEED certification: Platinum (80+ points) Gold (60-79 points) Silver (50-59 points) Certified (40-49 points)
ENERGY STAR® Energy Star is a program run by the U.S. Environmental Protection Agency (EPA) and U.S. Department of Energy (DOE) that promotes energy efficiency and provides simple, credible, and unbiased information that consumers and businesses rely on to make well-informed decisions. Thousands of industrial, commercial, utility, state, and local organizations partner with the EPA to deliver cost-saving energy efficiency solutions that protect the climate while improving air quality and protecting public health. The Energy Star score compares a building’s energy performance to similar buildings nationwide and accounts for differences in operating conditions, regional weather data, and other important considerations. Certification is given on an annual basis, so a building must maintain its high performance to be certified year to year. To be eligible for Energy Star certification, a building must earn a score of 75 or higher on EPA’s 1 – 100 scale, indicating that it performs better than at least 75 percent of similar buildings nationwide. This 1 – 100 Energy Star score is based on the actual, measured energy use of a building and is calculated within EPA’s Energy Star Portfolio Manager tool.
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Citadel Center | 131 S Dearborn St
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