Thornton, CO Office Spaces for Rent

Find the best Thornton, CO office space among 15 for rent listings currently on the market.

Office Market FAQs

NWC 144th Ave. & Washington St. - Flexible Build-to-Suit MOB

E 144th Ave & Washington St, Thornton, CO
Space Type

Office
For Lease Contact for pricing

1 space available / 50,000 SF
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2200 East 104th Avenue

2200 East 104th Avenue, Thornton, Denver, CO
Space Type

Office
For Lease

$191.25 - $458.33/MO
2 spaces available / 1,492 - 3,961 SF
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12301-12351 North Grant Street

12301 North Grant Street, Thornton, CO
Space Type

Office
For Lease

$10.50/SF/YR
1 space available / 5,400 SF
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Horizon Terrace

9351 Grant Street, Thornton, CO
Space Type

Office
For Lease Contact for pricing

4 spaces available / 1,579 - 4,100 SF
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Thornton Medical Plaza

9461 Huron Street, Thornton, CO
Space Type

Office
For Lease Contact for pricing

1 space available / 8,828 SF
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York Street Depot - 12412 York Street

12412 York Street, Thornton, CO
Space Type

Private Offices
For Lease

From $900/month
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10001 Washington Street

10001 Washington Street, Thornton, CO
Space Type

Office
For Lease Contact for pricing

1 space available / 1,427 SF
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Trinity Medical Plaza

12880 Colorado Blvd, Thornton, CO
Space Type

Office
For Lease

$27.00/SF/YR
2 spaces available / 1,132 - 1,998 SF
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Brookside Professional Center

8859 Fox Drive, Thornton, CO
Space Type

Office
For Lease Contact for pricing

1 space available / 3,167 SF
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2090 East 104th Avenue

2090 East 104th Avenue, Thornton, CO
Space Type

Office
For Lease

$87.50 - $138.17/MO
2 spaces available / 1,110 - 1,809 SF
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Frequently Asked Questions

In Thornton, office spaces range from smaller units to larger options. On average, office spaces in this area tend to be about 6,201 square feet. However, the largest listings can go up to 50,000 square feet for an individual listing. This can give you a good starting point to compare with your needs.
In Thornton, you have several options when it comes to leasing office space. To better understand what to look for, check out our definitive guide to finding office space for your small business or startup. Here is an overview of the most common types currently available:
- Most Common Office Type
  The most frequent subtype available for lease is General Office, which makes up 66.67% of all listings in the city.
- Second-Most Common Office Type
  The second-most common office space type listed here is Medical Office, accounting for 13.33% of available listings.
You can find a total of 15 listings for lease in Thornton, which add up to a total of 86,811 square feet.

Thornton, CO Office Space for Rent

Office inventory

According to our listing data, Thornton's office market contains 1.1M square feet of space as of 2026.

Thornton Office Market Breakdown by Building Size
Building Size Range	Total Square Feet
50k to 100k Sq. Ft.	220.5K Sq. Ft.
100k to 500k Sq. Ft.	710.1K Sq. Ft.

Data was provided by Yardi Research Data, refers to properties larger than 50,000 square feet.

Properties sized 100k to 500k Sq. Ft. make up most of the local office inventory, amounting to 710.1K square feet.

Average Rent for Office Spaces

You can find rental rates as low as $17 per square foot here, depending on what compromises you are willing to make. If you are looking for office space priced at a certain value, you can use the filters at the top of the page to look for properties within your optimal range.

The maximum rental rate is $30 per square foot among local listings currently available for lease.

Office Spaces Classes

The office space market in Thornton incorporates a mix of properties of various ages, ratings, construction grades, and other quality indicators. 13.69% of total office listings in this city are in properties rated Class A. Class B accounts for 40.27% of traditional work spaces listed on the leasing market. Class C makes up 46.04% of such listings in Thornton. This data is current as of 2026.

Thornton Office Market Breakdown by Building Class
Class	Total Square Feet	Share of Total Office
A	157.3K	13.69%
B	462.7K	40.27%
C	529K	46.04%

Data was provided by Yardi Research Data, refers to properties larger than 50,000 square feet.

Thornton, CO Office Spaces for Rent

NWC 144th Ave. & Washington St. - Flexible Build-to-Suit MOB

2200 East 104th Avenue

12301-12351 North Grant Street

Horizon Terrace

Thornton Medical Plaza

York Street Depot - 12412 York Street

10001 Washington Street

Trinity Medical Plaza

Brookside Professional Center

2090 East 104th Avenue

Frequently Asked Questions

Thornton, CO Office Space for Rent

Office inventory

Average Rent for Office Spaces

Office Spaces Classes

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