What is NAICS code 531120?

NAICS 531120 is the industry "Lessors of Nonresidential Buildings (except Miniwarehouses)" in the North American Industry Classification System, part of the Real Estate and Rental and Leasing sector (53).

What is the size standard for NAICS 531120?

The SBA sets a small business size standard for each NAICS code, either average annual receipts or number of employees. Check the current value for 531120 in the SBA table of size standards on sba.gov; it changes from time to time.

NAICS Code 531120: Lessors of Nonresidential Buildings (except Miniwarehouses)

NAICS code 531120 is the industry for lessors of nonresidential buildings (except miniwarehouses) in the Real Estate and Rental and Leasing sector. Agencies tag every federal contract with a NAICS code, so this is the code to list in your SAM.gov registration and to search for bids.

Government contracts under NAICS 531120

Federal agencies obligated $332M on contracts under NAICS 531120 from FY2024 to FY2026, including $71.2M in FY2026. The biggest buyers were the Department of Defense, the Smithsonian Institution, the Department of Agriculture. The largest contractors were Smithsonian Institution, Ma-Chis International Services, Inc., Trizec Holdings Inc.

See the full breakdown: government lessors of nonresidential buildings (except miniwarehouses) contracts, who wins and who buys.

Open government bids for NAICS 531120

The newest open notices from SAM.gov. Bidding needs a free SAM.gov registration.

Request for Office Space - Prineville, OR
Agriculture, Department of · Presolicitation · NAICS 531120 · OR
Posted Oct 30, 2026 · Responses due Nov 14, 2026
6NC0185 General Services Administration (GSA) seeks to lease 3,500 SQ FT of warehouse space in Raleigh, NCClosing soon
General Services Administration · Presolicitation · NAICS 531120 · NC
Posted Oct 30, 2026 · Responses due Nov 6, 2026
U.S. GOVERNMENT WANTS TO LEASE OFFICE SPACE IN ALBUQUERQUE, NM
General Services Administration · Presolicitation · NAICS 531120 · NM
Posted Oct 29, 2026 · Responses due Nov 18, 2026
General Services Administration (GSA) seeks to lease the following space in Miami, FL:
General Services Administration · Solicitation · NAICS 531120 · FL · No Set aside used
Posted Oct 29, 2026 · Responses due Nov 20, 2026
SOLICITATION: RLP PACKAGE: The Government is seeking to lease office and related space in FT. LEE, NEW JERSEY for a minimum of 25,939 ANSI/BOMA (ABOA) to a maximum of 27,233 ABOA square feet.
General Services Administration · Solicitation · NAICS 531120
Posted Oct 29, 2026 · Responses due Nov 23, 2026

See all 8 open bids under NAICS 531120

Small business size standard for NAICS 531120

To bid on small business set-aside contracts under NAICS 531120, your business must be small under the SBA size standard for this code, measured either by average annual receipts or by number of employees. The values are updated periodically, so check the current SBA table of size standards before you bid.

Other NAICS codes in 5311

How to choose the right NAICS code

Pick the 6-digit code that best describes what you sell. List it as your primary code in SAM.gov, and add other codes for related work. Agencies choose one NAICS code for each contract, so check the codes on past awards for the kind of work you do. Search all codes in the NAICS code lookup.

Related guides

Frequently asked questions

What is NAICS code 531120?: NAICS 531120 is the industry "Lessors of Nonresidential Buildings (except Miniwarehouses)" in the North American Industry Classification System, part of the Real Estate and Rental and Leasing sector (53).
What is the size standard for NAICS 531120?: The SBA sets a small business size standard for each NAICS code, either average annual receipts or number of employees. Check the current value for 531120 in the SBA table of size standards on sba.gov; it changes from time to time.
Are there government contracts for NAICS 531120?: Yes. Federal agencies obligated $332M on contracts under NAICS 531120 from FY2024 to FY2026, and 8 notices are open right now.