How to register as a vendor with County of Los Angeles

County of Los Angeles posts its solicitations on Doing Business with Los Angeles County (open solicitations).^[1] Open County solicitations are listed on the Doing Business site under Open Solicitations; you respond using the vendor number from WebVen.

BidRover is tracking 213 open bids from buyers in and around County of Los Angeles. Most common categories:

• General procurement · 44
• Goods & supplies · 25
• Construction & facilities · 24
• Professional services · 22
• Environmental & energy · 17
• Healthcare · 10
• Social & community services · 10
• Transportation & logistics · 8

1. Roof Replacement - Fs 40 - Job WalkCalifornia, United States · Due Nov 4, 2026
2. Beyondtrust Renewal (Brand Only)California, United States · Due Nov 5, 2026
3. Building Window Cleaning Interior/Exterior - Job WalkCalifornia, United States · Due Nov 4, 2026
4. 2726002 - Paddle Boards - LfgdCalifornia, United States · Due Nov 4, 2026
5. Agricultural Commissioner/Weights and Measures South Gate Meter Pit Repurpose ProjectCalifornia, United States · Due Nov 24, 2026
6. Roof Replacement Projects (Mandatory Job Walk)California, United States · Due Nov 3, 2026

1. 01

   Register on WebVen vendor registration

   Start registration. Cost: No fee listed by the County. You need your tax ID and an IRS W-9 (W-8 for foreign payment addresses), contact details, your California sales tax permit if you have one, and at least one commodity/service selection. The EIN or SSN is verified with the IRS, and a vendor number arrives by email in about 1-5 business days.^[2]

2. 02

   Choose your commodity codes

   Notifications are sent by the codes in your vendor profile. Pick every code that describes your work, and revisit them when you add a service.

3. 03

   Get certified if you qualify

   Local Small Business Enterprise (LSBE), through the LA County Department of Economic Opportunity (DEO). Register as a County vendor first; DEO also certifies DVBE, Social Enterprise (SE) and Community Business Enterprise (CBE).^[3]

4. 04

   Watch the other buyers

   State agencies in California buy through the state portal, and school districts, transit agencies and utilities in the area usually post on their own sites. Registering with County of Los Angeles does not register you with them.

Exact requirements vary by portal; the registration page linked above is the authority. Most ask for:

• Your legal business name and address exactly as registered with the state, and your federal tax ID (EIN, or SSN for some sole proprietors).
• A signed IRS Form W-9, which most buyers collect before they can pay you.
• Commodity codes (NIGP, UNSPSC or NAICS, depending on the portal) for every product and service you sell.
• A contact who will receive bid notices, plus any business license or registration the jurisdiction requires.
• Certificates of insurance and, for construction, bonding capacity: these are usually requested per bid rather than at registration.

• Pick commodities carefully in WebVen, since email bid alerts are based on what you select.
• Get your WebVen vendor number before applying for LSBE, DVBE, SE or CBE certification in the DEO portal.
• Certified LSBE, DVBE and SE firms get a 15% price preference, capped at $150,000.

1. isd.lacounty.gov/do-business-with-the-county-of-los-angeles-and-become-a-vendor/
2. camisvr.co.la.ca.us/Webven/download/New_Registration_Help_Guide.pdf
3. iddweb.isd.lacounty.gov/DCA_eComplaint/SmallBusinessCertifications