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18th Street Atrium 1621 18th St 22,049 - 128,221 SF of Office Space Available in Denver, CO 80202

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HIGHLIGHTS

  • Located in LoDo with immediate access to Union Station, restaurants, and entertainment.
  • Features large open layouts, natural light, and efficient elevator and stair access.
  • Offers over 73,000 RSF across three flexible floors suited for office or retail use.
  • Combines historic architecture with modern infrastructure in a highly visible corner location.

ALL AVAILABLE SPACES(5)

Display Rental Rate as

  • SPACE
  • SIZE
  • TERM
  • RENTAL RATE
  • SPACE USE
  • CONDITION
  • AVAILABLE
  • Lower Level, Ste 10
  • 22,049 SF
  • Negotiable
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

This space offers a total of 22,049 rentable square feet (RSF), designed to accommodate a variety of commercial or office uses. The layout features expansive open areas suited for collaborative workspaces, alongside several enclosed rooms that may serve as private offices, conference rooms, or support spaces. Centrally located are key building components, including restrooms, stairwells, elevators, and mechanical rooms. The space offers access from multiple points and fronts 18th Street, enhancing both visibility and accessibility. The lower level is part of the ATRIUM building, offering a flexible and efficient floor plan for prospective tenants.

  • Fully Built-Out as Standard Office
  • 8 Private Offices
  • Can be combined with additional space(s) for up to 128,221 SF of adjacent space
  • Mostly Open Floor Plan Layout
  • 2 Conference Rooms
  • Space offers flexible floor plan.
  • 1st Floor, Ste 100
  • 23,549 SF
  • Negotiable
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

The first floor of 1621 18th Street in Denver's LoDo district offers 23,549 rentable square feet (RSF) of versatile commercial space within the ATRIUM building. This level features a spacious and open layout ideal for retail, office, or mixed-use occupancy. Large open areas are complemented by a series of private rooms and smaller partitioned spaces, providing flexibility for a variety of business configurations. A central stairwell and elevator core ensures easy vertical circulation, while additional support spaces, including restrooms and mechanical areas, are conveniently located. With prominent street frontage on 18th Street and multiple access points, this first-floor suite combines visibility, functionality, and adaptability in a prime downtown location.

  • Fully Built-Out as Standard Office
  • 14 Private Offices
  • Can be combined with additional space(s) for up to 128,221 SF of adjacent space
  • Mostly Open Floor Plan Layout
  • 4 Conference Rooms
  • Space offers flexible floor plan.
  • 2nd Floor, Ste 200
  • 27,513 SF
  • Negotiable
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

The second floor of 1621 18th Street offers 27,513 rentable square feet (RSF) of adaptable office space within the ATRIUM building, located in Denver’s vibrant LoDo neighborhood. The layout is well-balanced, featuring a combination of open-plan areas for collaborative work, as well as numerous private offices and meeting rooms along the perimeter for focused tasks or executive use. A centrally positioned stairwell and bank of elevators ensure efficient vertical connectivity, while restrooms and support spaces are conveniently grouped near the core. Ample natural light and multiple entry points enhance the functionality and appeal of the space, making it suitable for a wide range of professional or corporate tenants seeking a dynamic downtown presence.

  • Fully Built-Out as Standard Office
  • 26 Private Offices
  • Can be combined with additional space(s) for up to 128,221 SF of adjacent space
  • Mostly Open Floor Plan Layout
  • 4 Conference Rooms
  • Space offers flexible floor plan.
  • 3rd Floor, Ste 300
  • 27,555 SF
  • Negotiable
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • 30 Days

The third floor of 1621 18th Street offers 27,555 rentable square feet (RSF) of adaptable office space within the ATRIUM building, located in Denver’s vibrant LoDo neighborhood. The layout is well-balanced, featuring a combination of open-plan areas for collaborative work, as well as numerous private offices and meeting rooms along the perimeter for focused tasks or executive use. A centrally positioned stairwell and bank of elevators ensure efficient vertical connectivity, while restrooms and support spaces are conveniently grouped near the core. Ample natural light and multiple entry points enhance the functionality and appeal of the space, making it suitable for a wide range of professional or corporate tenants seeking a dynamic downtown presence. Virtual Tour: https://my.matterport.com/show/?m=jZHUfGdPX1S&brand=0&mls=1&

  • Fully Built-Out as Standard Office
  • 10 Private Offices
  • 99 Workstations
  • Space offers flexible floor plan.
  • Mostly Open Floor Plan Layout
  • 2 Conference Rooms
  • Can be combined with additional space(s) for up to 128,221 SF of adjacent space
  • 4th Floor, Ste 400
  • 27,555 SF
  • Negotiable
  • Upon Request Upon Request Upon Request Upon Request
  • Office
  • Full Build-Out
  • Now

The third floor of 1621 18th Street offers 27,555 rentable square feet (RSF) of adaptable office space within the ATRIUM building, located in Denver’s vibrant LoDo neighborhood. The layout is well-balanced, featuring a combination of open-plan areas for collaborative work, as well as numerous private offices and meeting rooms along the perimeter for focused tasks or executive use. A centrally positioned stairwell and bank of elevators ensure efficient vertical connectivity, while restrooms and support spaces are conveniently grouped near the core. Ample natural light and multiple entry points enhance the functionality and appeal of the space, making it suitable for a wide range of professional or corporate tenants seeking a dynamic downtown presence.

  • Fully Built-Out as Standard Office
  • 8 Private Offices
  • 110 Workstations
  • Space offers flexible floor plan.
  • Mostly Open Floor Plan Layout
  • 6 Conference Rooms
  • Can be combined with additional space(s) for up to 128,221 SF of adjacent space
Space Size Term Rental Rate Space Use Condition Available
Lower Level, Ste 10 22,049 SF Negotiable Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now
1st Floor, Ste 100 23,549 SF Negotiable Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now
2nd Floor, Ste 200 27,513 SF Negotiable Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now
3rd Floor, Ste 300 27,555 SF Negotiable Upon Request Upon Request Upon Request Upon Request Office Full Build-Out 30 Days
4th Floor, Ste 400 27,555 SF Negotiable Upon Request Upon Request Upon Request Upon Request Office Full Build-Out Now

Lower Level, Ste 10

Size
22,049 SF
Term
Negotiable
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
Full Build-Out
Available
Now

1st Floor, Ste 100

Size
23,549 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 200

Size
27,513 SF
Term
Negotiable
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
Full Build-Out
Available
Now

3rd Floor, Ste 300

Size
27,555 SF
Term
Negotiable
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
Full Build-Out
Available
30 Days

4th Floor, Ste 400

Size
27,555 SF
Term
Negotiable
Rental Rate
Upon Request Upon Request Upon Request Upon Request
Space Use
Office
Condition
Full Build-Out
Available
Now

Lower Level, Ste 10

Size 22,049 SF
Term Negotiable
Rental Rate Upon Request
Space Use Office
Condition Full Build-Out
Available Now

This space offers a total of 22,049 rentable square feet (RSF), designed to accommodate a variety of commercial or office uses. The layout features expansive open areas suited for collaborative workspaces, alongside several enclosed rooms that may serve as private offices, conference rooms, or support spaces. Centrally located are key building components, including restrooms, stairwells, elevators, and mechanical rooms. The space offers access from multiple points and fronts 18th Street, enhancing both visibility and accessibility. The lower level is part of the ATRIUM building, offering a flexible and efficient floor plan for prospective tenants.

  • Fully Built-Out as Standard Office
  • Mostly Open Floor Plan Layout
  • 8 Private Offices
  • 2 Conference Rooms
  • Can be combined with additional space(s) for up to 128,221 SF of adjacent space
  • Space offers flexible floor plan.

1st Floor, Ste 100

Size 23,549 SF
Term Negotiable
Rental Rate Upon Request
Space Use Office
Condition Full Build-Out
Available Now

The first floor of 1621 18th Street in Denver's LoDo district offers 23,549 rentable square feet (RSF) of versatile commercial space within the ATRIUM building. This level features a spacious and open layout ideal for retail, office, or mixed-use occupancy. Large open areas are complemented by a series of private rooms and smaller partitioned spaces, providing flexibility for a variety of business configurations. A central stairwell and elevator core ensures easy vertical circulation, while additional support spaces, including restrooms and mechanical areas, are conveniently located. With prominent street frontage on 18th Street and multiple access points, this first-floor suite combines visibility, functionality, and adaptability in a prime downtown location.

  • Fully Built-Out as Standard Office
  • Mostly Open Floor Plan Layout
  • 14 Private Offices
  • 4 Conference Rooms
  • Can be combined with additional space(s) for up to 128,221 SF of adjacent space
  • Space offers flexible floor plan.

2nd Floor, Ste 200

Size 27,513 SF
Term Negotiable
Rental Rate Upon Request
Space Use Office
Condition Full Build-Out
Available Now

The second floor of 1621 18th Street offers 27,513 rentable square feet (RSF) of adaptable office space within the ATRIUM building, located in Denver’s vibrant LoDo neighborhood. The layout is well-balanced, featuring a combination of open-plan areas for collaborative work, as well as numerous private offices and meeting rooms along the perimeter for focused tasks or executive use. A centrally positioned stairwell and bank of elevators ensure efficient vertical connectivity, while restrooms and support spaces are conveniently grouped near the core. Ample natural light and multiple entry points enhance the functionality and appeal of the space, making it suitable for a wide range of professional or corporate tenants seeking a dynamic downtown presence.

  • Fully Built-Out as Standard Office
  • Mostly Open Floor Plan Layout
  • 26 Private Offices
  • 4 Conference Rooms
  • Can be combined with additional space(s) for up to 128,221 SF of adjacent space
  • Space offers flexible floor plan.

3rd Floor, Ste 300

Size 27,555 SF
Term Negotiable
Rental Rate Upon Request
Space Use Office
Condition Full Build-Out
Available 30 Days

The third floor of 1621 18th Street offers 27,555 rentable square feet (RSF) of adaptable office space within the ATRIUM building, located in Denver’s vibrant LoDo neighborhood. The layout is well-balanced, featuring a combination of open-plan areas for collaborative work, as well as numerous private offices and meeting rooms along the perimeter for focused tasks or executive use. A centrally positioned stairwell and bank of elevators ensure efficient vertical connectivity, while restrooms and support spaces are conveniently grouped near the core. Ample natural light and multiple entry points enhance the functionality and appeal of the space, making it suitable for a wide range of professional or corporate tenants seeking a dynamic downtown presence. Virtual Tour: https://my.matterport.com/show/?m=jZHUfGdPX1S&brand=0&mls=1&

  • Fully Built-Out as Standard Office
  • Mostly Open Floor Plan Layout
  • 10 Private Offices
  • 2 Conference Rooms
  • 99 Workstations
  • Can be combined with additional space(s) for up to 128,221 SF of adjacent space
  • Space offers flexible floor plan.

4th Floor, Ste 400

Size 27,555 SF
Term Negotiable
Rental Rate Upon Request
Space Use Office
Condition Full Build-Out
Available Now

The third floor of 1621 18th Street offers 27,555 rentable square feet (RSF) of adaptable office space within the ATRIUM building, located in Denver’s vibrant LoDo neighborhood. The layout is well-balanced, featuring a combination of open-plan areas for collaborative work, as well as numerous private offices and meeting rooms along the perimeter for focused tasks or executive use. A centrally positioned stairwell and bank of elevators ensure efficient vertical connectivity, while restrooms and support spaces are conveniently grouped near the core. Ample natural light and multiple entry points enhance the functionality and appeal of the space, making it suitable for a wide range of professional or corporate tenants seeking a dynamic downtown presence.

  • Fully Built-Out as Standard Office
  • Mostly Open Floor Plan Layout
  • 8 Private Offices
  • 6 Conference Rooms
  • 110 Workstations
  • Can be combined with additional space(s) for up to 128,221 SF of adjacent space
  • Space offers flexible floor plan.

PROPERTY OVERVIEW

Located in the heart of Denver’s vibrant and historic Lower Downtown (LoDo) district, 1621 18th Street offers a premier commercial opportunity within the iconic ATRIUM building. This multi-story property blends modern functionality with timeless architectural character, providing over 73,000 square feet of flexible office and retail space across three levels. The building features expansive, open floor plates on the lower (22,049 RSF), first (23,549 RSF), and second (27,513 RSF) floors, designed to accommodate a wide range of uses—from creative offices and corporate headquarters to boutique retail or collaborative workspaces. Each level is outfitted with key infrastructure including multiple restrooms, elevator and stair access, and natural light from large windows and atrium-style openings. Positioned on the corner of 18th Street and Wynkoop, the property boasts excellent street visibility and walkability, with immediate access to Union Station, light rail, award-winning restaurants, hotels, and entertainment. Tenants will benefit from the building's central location, historic charm, and proximity to downtown business corridors and transportation hubs. With its blend of flexible interiors, prime location, and modern amenities within a historic context, 1621 18th Street is a standout choice for businesses seeking a dynamic and professional presence in one of Denver’s most desirable neighborhoods.

  • Atrium
  • Commuter Rail
  • Property Manager on Site
  • Air Conditioning

PROPERTY FACTS

Building Type
Office
Year Built/Renovated
1964/2019
Building Height
5 Stories
Building Size
128,221 SF
Building Class
B
Typical Floor Size
25,644 SF
Unfinished Ceiling Height
13’
Parking
16 Surface Parking Spaces at $200/month
202 Covered Parking Spaces at $250/month
Reserved Parking
Walk Score®
Walker's Paradise (93)
Transit Score®
Excellent Transit (84)
Bike Score®
Biker's Paradise (91)
What is a Walk Score®, Transit Score® & Bike Score®?
Walk Score® measures the walkability of any address.
Transit Score® measures access to public transit.
Bike Score® measures bikeability of a location.
What is a Walk Score®
, Transit Score® & Bike Score?
Walk Score® measures the walkability
of any address. Transit Score®
measures access to public transit. Bike Score®
measures bikeability of a location.®
  • Listing ID: 36215883

  • Date on Market: 6/11/2025

  • Last Updated:

  • Address: 1621 18th St, Denver, CO 80202

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