L & J Building Company LLC
L & J Building Company LLC (doing business as Rock Enterprise) is a small business in Kansas City, MO registered on SAM.gov to bid on federal contracts. It has won about $5.9 million in federal prime contracts since fiscal year 2024, according to USAspending.gov.
- UEI
- HD1QGQ43VNW3
- CAGE code
- 4JRA6
- SAM.gov registration
- Active
Registration details
| Legal business name | L & J Building Company LLC |
|---|---|
| Doing business as | Rock Enterprise |
| Unique Entity ID (UEI) | HD1QGQ43VNW3 |
| CAGE code | 4JRA6 |
| Location | Kansas City, MO |
| SAM.gov registration | Active through Sep 2, 2027 |
| Business started | 2006 |
| Primary NAICS code | 236220: Commercial and Institutional Building Construction |
Certifications and business types
- Small disadvantaged business (self-reported in SAM.gov)
SBA certifications let a business compete for set-aside contracts. See set-aside contracts explained.
Federal contract history
USAspending.gov shows no federal prime contracts for this UEI in the last five years. Many small businesses start as subcontractors to larger firms; see how to become a government subcontractor.
NAICS codes L & J Building Company LLC is small under
On its SAM.gov registration, L & J Building Company LLC meets the SBA size standard for these industries, so it can bid on small business set-asides that use them.
- 236220 Commercial and Institutional Building Construction
- 236210 Industrial Building Construction
- 237310 Highway, Street, and Bridge Construction
- 237990 Other Heavy and Civil Engineering Construction
- 238210 Electrical Contractors and Other Wiring Installation Contractors
- 238220 Plumbing, Heating, and Air-Conditioning Contractors
- 238290 Other Building Equipment Contractors
- 333415 Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing
- 334290 Other Communications Equipment Manufacturing
- 561730 Landscaping Services
- 561790 Other Services to Buildings and Dwellings
Open contracts in L & J Building Company LLC's NAICS codes
732 open federal opportunities on SAM.gov use a NAICS code L & J Building Company LLC is small under. These are due soonest.
- NEW Elevator Full Service Contract BASE PLUS 4 OPTION YEARS FHCC VAMC, NORTH CHICAGO IL
Due in 2 daysOct 12, 2026
- CON | Z1DA | REPLACE OR CHILLERS | 580-23-105 | PRESOLICITATION
✦ The VA Medical Center in Houston, TX plans a construction contract to remove and replace two operating room chillers in Building 100.
Due in 2 daysOct 12, 2026
- Groundskeeping
Due in 2 daysOct 12, 2026
- Groundskeeping
Due in 2 daysOct 12, 2026
- Y1DA | 521-24-102 | Renovate Wards 2K and 2B for Optometry/Ophthalmology Clinical Use
Due in 2 daysOct 12, 2026
Similar small businesses
Other small businesses with the same primary NAICS code (236220) that have won federal contracts, starting with Missouri:
- Zodiac-Poettker HBZ Joint Venture Iii, LLC, Saint Louis, MO
- Prairie Band-Compass JV LLC, Kansas City, MO
- Snodgrass Contracting LLC, Seymour, MO
- Defender Contracting & Construction LLC, Kansas City, MO
- Rock Construction Management LLC, Blue Springs, MO
- Reese Equipment Company LLC, Dixon, MO
Frequently asked questions
What is L & J Building Company LLC's CAGE code?
L & J Building Company LLC's CAGE code is 4JRA6. The Defense Logistics Agency assigns CAGE codes when a business registers on SAM.gov.
What is L & J Building Company LLC's UEI?
L & J Building Company LLC's Unique Entity ID (UEI) is HD1QGQ43VNW3. SAM.gov assigns the UEI, and it identifies the business across the federal government.
Is L & J Building Company LLC's SAM.gov registration active?
Yes, as of the latest SAM.gov public data, L & J Building Company LLC's registration is active through sep 2, 2027. Registrations are renewed every year.
Is L & J Building Company LLC a small business?
L & J Building Company LLC is registered on SAM.gov as small under 11 NAICS codes, including its primary code, 236220. Size is set per NAICS code, so a business can be small for some contracts and not others.
Keep going
- Look up another business's CAGE code or UEI
- Check a SAM.gov registration's status
- How to become a government subcontractor
Registration details come from SAM.gov's public entity extract and contract figures from USAspending.gov. Contact names and street addresses are left out. To change these details, update the registration on SAM.gov. To ask us to remove this page, email hello@fedready.us.