How to become an approved vendor at a California marina

1. Find out who runs the water

Start by working out who controls the docks you want to work on. California harbors fall into three groups, and each group handles vendors differently.

• Public harbors with a harbor-wide permit. A port district, harbor district, city or county issues one permit or ID that covers the whole harbor. Examples: the Port of San Diego's In-Water Hull Cleaning Permit^[1], Santa Barbara's Business Activity Permit^[2], Ventura Harbor's Commercial Identification card^[3], Newport Beach's Marine Activities Permit^[4], Marina del Rey's Commercial Services ID^[5] and the San Mateo County Harbor District's commercial activity permits^[6].
• Private marinas keep their own vendor lists and insurance rules. Clipper Yacht Harbor in Sausalito, for example, wants proof of insurance on file before you work.^[7]
• Boatyards usually ask the most: approval for each vessel, broader insurance, and their own rules on sanding and painting. KKMI in Point Richmond, for example, wants prior approval for each vessel and bans sanding antifouling paint and spray painting.^[12]

Inside a public harbor, the private marinas can add their own rules on top of the harbor permit. The Port of San Diego's ordinance requires marinas to check a hull cleaner's Port permit before letting them work.^[1]

2. Get the business basics in place

Harbors ask for proof that your business is registered locally. The item they ask for most often is a business license from the harbor's city, not the city you live in. Long Beach asks for a City of Long Beach business license^[9], Ventura a City of Ventura license^[3], Santa Barbara a City Business Tax Certificate^[2]. If you work in several harbors, you may need several city licenses.

If you sell parts or materials, you may also need a seller's permit. A repairer is the retailer of parts when they are worth more than 10% of the total charge, or when they are billed separately.^[10] The startup guide covers entity, DBA, EIN, licenses and workers' comp.

3. Get insurance that fits boat work, then certificates

Almost every harbor with published rules wants insurance on file before you start. The most common figure is $1,000,000 in general liability, but published limits run from $500,000 to $2,000,000. Santa Barbara asks for $2,000,000 for major repair work and commercial diving, and $500,000 for minor maintenance.^[2] Some ask for more. Santa Cruz's boatyard asks for ship repairer's legal liability, workers' comp with a federal longshore (USL&H) endorsement, and auto^[11], and San Mateo County wants hull, machinery and protection and indemnity (P&I) coverage if you operate a vessel.^[6]

The harbor usually wants to be named as an additional insured. A certificate of insurance is only a summary. Additional-insured status comes from an endorsement to your policy, which is why some harbors ask for the endorsement page itself.^[13] Ventura is explicit: the endorsement naming the Ventura Port District must be attached.^[3]

The insurance guide explains the coverages. The insurance coverage check compares your limits with each harbor's published minimums. The COI request letter writes the request to your broker with the harbor's wording filled in.

4. Get the trade credentials harbors look for

The harbor rules we found ask for credentials mostly from hull cleaners. Marina del Rey requires BMP certification for anyone cleaning hulls in the water, renewed every two years, plus a diver certification card for the Commercial Services ID.^[14] Santa Barbara asks hull cleaners for proof of BMP training within the previous five years.^[2] For other trades, marinas rarely name a credential, but owners and boatyards look for ABYC, NMEA or EPA 608 certification. See certifications by trade.

5. Assemble the packet, apply and pay

Most harbors want the same core documents: business details, the local license, the certificate and endorsement, workers' comp proof if you have employees, a list of the people who will work there, and the application and fee. Some add more. Santa Cruz asks boatyard contractors for three references^[11], and Westpoint Harbor has you sign a vendor registration form, contractor agreement and BMP agreement.^[19]

Use the vendor packet checklist to gather everything. Pick a harbor and it adds that harbor's published requirements. The harbor permit planner totals the annual fees for the harbors you want to work in.

6. Follow the on-site rules

Once you're approved, the rules on the dock are what keep you approved.

• Check in. San Francisco Marina has vendors check in online on each work day.^[15] Moss Landing has contractors check in at the Harbor Master before boarding.^[16]
• Work for a tenant. Some harbors only let you in for a specific boat owner. Moss Landing has the owner file a contractor authorization in advance.^[16]
• Hours. Brickyard Cove Marina's contractor hours are 8:00 a.m. to 5:30 p.m.^[17]
• Environmental rules. Long Beach's marina policy says not to clean a hull for 90 days after new paint and to use the least abrasive pads.^[18] Sacramento Marina bans underwater sanding^[20], and Westpoint Harbor bans underwater sanding and spray painting in its vendor BMPs.^[21]
• Don't solicit. Dana Point Harbor's code of conduct, for one, prohibits soliciting.^[22]

7. Keep everything current

Approvals lapse quietly. Harbor permits renew on different cycles: Ventura's cards expire June 30 each year^[3], Santa Barbara's permit is annual (its 2026 policy says it is due February 1^[2], while the City's rates page says August 1, so ask the Waterfront office^[24]), and Marina del Rey's ID and BMP certification run two years.^[14] Your insurance certificates expire when your policy renews, and some harbors deactivate gate keys when your documents lapse.^[8] Put every date in the renewal tracker.