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    Thornton, CO Office Spaces for Lease

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    Thornton Office Space For Rent
    Updated: Nov 24, 2025
    Thornton Office Space For Rent

    9351 Grant St, Thornton, CO

    Contact for pricing
    2,771 sqft 5.52 AC lot
    Outstanding panoramic mountain and city views.
    Excellent frontage and identity at the intersection of I‑25 & Thornton Pkwy.
    Enjoy 24/7 building access.
    Easy access to Denver International Airport.
    Monument signage available.
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    Thornton Office Space Available
    Updated: Nov 24, 2025
    Thornton Office Space Available

    500 East 84th Avenue, Thornton, CO 80229

    $16.50 SF/Yr
    Furnished call center offers a plug and play opportunity.
    Features drive‑in/dock high loading.
    Large, flexible floorplates to suit your needs.
    Ample parking available.
    Benefit from highway visibility.
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    Medical Office Suite with Treatment Rooms
    Medical Office Suite with Treatment Rooms

    10001 Washington St, Thornton, CO 80229

    Contact for pricing
    1,427 sqft

    Air-conditioned suite includes open reception, four treatment rooms, a large lab area, and private offices with courtyard views.

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    Turn a Listing Into an Investment Snapshot Cap Rate, Potential NOI, Demand score for every listing. Go To Analytics Center
    Based on your search, we've compiled 16 Potential Opportunities for your consideration. Besides 3 Active listings in Thornton, CO, we suggest exploring alternatives. Consider Similar 4 Spaces in Nearby Cities, and Similar 8 Properties for Sales.

    Office Spaces for Lease in Nearby Cities

    Here are 4 Similar Spaces we found in Nearby Locations for your consideration.

    Remodeled Professional Office Suites
    Remodeled Professional Office Suites

    11172 Huron Street Unit: 22, Denver, CO 80234

    $650-$850/Mo

    Private upper-level offices in a two-story building with shared conference, kitchen, lobby, and sitting-area amenities.

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    Medical Office Building
    Medical Office Building

    2335 W 112th Ave, Westminster, CO 80234

    $35 SF/Yr

    For-lease medical office space in a highly accessible northwest Denver suburb with a large established patient base.

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    Westminster Office Space For Lease
    Westminster Office Space For Lease

    1499 W 120th Ave, Westminster, CO 80234

    $27 SF/Yr

    Office space available for lease in Westminster, Colorado.

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    Denver Office Space Available
    Denver Office Space Available

    2390 West 104th Avenue, Denver, CO 80234

    Contact for pricing
    17,000 sqft

    10,000 square foot office space for rent in Denver.

    View details

    Similar Spaces for Sale in Thornton, CO

    Consider Similar Space for Sale. We found 8 Spaces matching your search parameters.

    Renovated Multi-Tenant Office Building
    Renovated Multi-Tenant Office Building

    9101 Pearl Street, Thornton, CO 80229

    $1,730,000
    2.03 AC lot

    Three-story professional office property with shared conference space, surface parking, and continuous building access.

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    Data Center and Office Facility
    Data Center and Office Facility

    12121 Grant St, Thornton, CO 80241

    Contact for pricing
    267,177 sqft

    Large data center with built-in power and cooling capacity plus generator-backed redundancy for technology tenants.

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    Class A Office/Warehouse Building
    Class A Office/Warehouse Building

    12405 Grant St, Thornton, CO 80241

    Contact for pricing
    13,500 sqft

    Stand-alone Class A office building with integrated warehouse for sale.

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    New-Build Small-Bay Flex Building
    New-Build Small-Bay Flex Building

    12295 Pennsylvania Street, Thornton, CO 80241

    Contact for pricing
    10,000 sqft

    Self-contained commercial units combine warehouse utility with dedicated office and business infrastructure.

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    Flex Space with Drive-In Door
    Flex Space with Drive-In Door

    12295 Pennsylvania St, Unit 3, Thornton, CO 80241

    Contact for pricing
    1,079 sqft

    Office, showroom, warehouse, and lobby areas support a versatile commercial layout.

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    Flex Space with Drive-In Door
    Flex Space with Drive-In Door

    12295 Pennsylvania St, Unit 2, Thornton, CO 80241

    Contact for pricing
    944 sqft

    Built-out commercial unit combines office, lobby, showroom, warehouse, and a private ADA restroom.

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    One-Level Office Condo For Sale
    One-Level Office Condo For Sale

    8801 Fox Dr 3, Thornton, CO 80260

    $280,000
    0.16 AC lot

    One-level office condo in Thornton, CO. Owner carry available.

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    Medical Office Condominium For Sale
    Medical Office Condominium For Sale

    10001 Washington St, Thornton, CO 80229

    Contact for pricing
    10,958 sqft

    10,958 SF medical office condominium, 100% occupied.

    View details

    Potential Development Sites for Consideration

    Can't find the perfect fit? These Land listings present an alternative path: the potential to develop a property for your specific goals.

    Important: These AI-suggestions are a starting point, not a guarantee of permitted use. All zoning, permitting, and land use information must be independently verified by you with the appropriate local authorities before making any commitments.

    Commercial Space Near Light Rail
    Commercial Space Near Light Rail

    3006 Welton Street, Denver, CO 80205

    $4,000/Mo
    1,186 sqft

    Commercial space for rent near light rail with TI allowance.

    View details

    Thornton, CO Office Spaces Lease Rates & Market Statistics

    Explore 3 Office Spaces for lease in Thornton, CO on Realmo, a commercial real estate exchange covering the Thornton area. The current inventory totals 4,198 square feet of properties.

    Office Spaces lease rates in Thornton range from $16.50 SF/Yr at the entry level to $16.50 SF/Yr at the top of the market, averaging $16.50 SF/Yr. Pricing across the market is relatively uniform, which simplifies like-for-like comparison between listings. The local average of $16.50 SF/Yr is 22% below the Colorado state average of $21.25 SF/Yr.

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