//Ventura County, California

How to start and grow a business in Ventura County.

A straight, practical guide to registering your business, getting the right permits, and actually finding customers in Ventura County. Every official link you need is below, plus where to get free help. No fluff, no hard sell.

Starting a business in Ventura County? The official steps and source links are below.

Already operating or launching with budget in place? You can also

Ventura County is its own economy, distinct from the Los Angeles sprawl to the south. There is the agriculture of the Oxnard Plain, the biotech and corporate presence anchored by Amgen in Thousand Oaks, the military footprint of Naval Base Ventura County, and the dense small-business and coastal markets across Ventura, Camarillo, and Simi Valley. It is a community-driven county where reputation carries real weight, and where being genuinely findable online is still a competitive edge rather than table stakes.

This page is the part most marketing sites skip: how to actually open your doors. The county, the state, and your specific city each have a role, and doing the steps in the right order saves you weeks. Below is the full sequence with links straight to the official sources, the trades that need extra permits, and the free local programs that will help you for nothing. The part about getting found by customers comes at the end, once you are legal and open.

//The sequence

How to start a business in Ventura County, step by step.

This is the order that works for most new businesses. Requirements vary by entity, location and industry, so use the city, county and state sources below to confirm what applies to yours.

1
Find out who licenses your address
Each of Ventura County's 10 cities (Camarillo, Fillmore, Moorpark, Ojai, Oxnard, Port Hueneme, Santa Paula, Simi Valley, Thousand Oaks and Ventura) requires a business license or tax certificate before you do business inside it, even if you are based elsewhere; the County Clerk lists every office. In unincorporated areas, every business needs a County Business Tax Certificate from the Treasurer-Tax Collector, approved by county Planning and Building and Safety, and some trades also need a Sheriff's Regulatory License. Business Tax Bureau: (805) 654-3727.
Ventura County Clerk-Recorder: New Business Information County of Ventura Treasurer-Tax Collector: Business Tax Certificate
2
Pick a structure and register the business
Form an LLC or corporation with the California Secretary of State through bizfile Online, or stay a sole proprietor. If you use a name that is not your legal name, file a fictitious business name (DBA) statement with the Ventura County Clerk-Recorder within 40 days of starting business. It costs $76 for one name and one registrant, plus $10 for each additional name or registrant; you can start online but finish in person with your original signature. Publish it within 45 days of filing, once a week for four consecutive weeks in a newspaper of general circulation in the county.
CA Secretary of State: bizfile Online Ventura County Clerk-Recorder: Fictitious Business Name
3
Get your free EIN and any seller's permit
The IRS says you generally need an EIN to hire employees or to operate a partnership or corporation. It issues the number online, immediately if approved, and never charges for it. If you sell or lease goods that would ordinarily be subject to sales tax, you also need a seller's permit from the CDTFA, which does not charge for it but may ask for a security deposit.
IRS: Get an EIN CDTFA: Seller's permit
4
Get your city business license or tax certificate
This is the step that changes most by city. Camarillo moved its business tax to an OpenGov portal in 2025, Thousand Oaks certificates expire every December 31, Ventura wants an approved Zoning Clearance before it takes an application, and a business located in Oxnard applies in person for zoning review. The free checklist lists all 10 city offices, and the city guides below walk through five of them.
Ventura County Clerk-Recorder: New Business Information
5
Confirm zoning and pull any industry permits
Before you sign a lease, confirm the use is allowed at the address with your city's planning office, or through a county zone clearance in unincorporated areas. If you sell or serve food: Ventura County Environmental Health issues the Permit to Operate every restaurant and market needs, and state law requires plans approved before a new facility is built or an existing one is remodeled. Plan review is usually needed for new construction, remodels, new or replacement equipment, an ownership change or a menu change: (805) 654-2813. For other permits, GO-Biz offers permitting and regulatory help for any size company.
Ventura County Environmental Health: Consumer Food Protection Ventura County Environmental Health: Food Plan Check GO-Biz: Permit & Regulatory Assistance
6
Report business equipment to the Assessor
If your business personal property cost $100,000 or more in total on January 1, or the Assessor asks, file a property statement by April 1; after 5 p.m. May 7 a late penalty applies. File by fax, email or mail with your account number, or online through e-SDR if you were sent a notice: (805) 654-2181.
Ventura County Assessor: Property Statement Filing
7
Check the $800 California tax rules for your entity
Every California LLC owes the $800 annual tax, even in a year it does no business, until it is cancelled. Corporations owe an $800 minimum franchise tax, but newly incorporated or qualified corporations do not pay it in their first taxable year.
Franchise Tax Board: LLC $800 annual tax Franchise Tax Board: Corporation minimum tax
8
Use the free help that already exists
The EDC Small Business Development Center offers one-on-one advising, workshops and in-depth programs at no cost for Ventura County businesses. Use it before you pay a consultant.
EDC Small Business Development Center (free advising)

//Free Ventura County checklist

Take the steps with you.

Get the Ventura County business checklist with the city, county, state and federal source links in one place, including the licensing office of every city and the county's rules for unincorporated areas. We keep the source page dated so you can see when it was last checked.

//City guides

Start-a-business guides for Ventura County cities.

Oxnard
Business Tax Certificate steps and the county's largest, agriculture-and-port city.
Thousand Oaks
Business Tax Certificate steps and the biotech and corporate Conejo Valley.
Ventura
Business Tax Certificate steps and the coastal downtown and harbor economy.
Simi Valley
Business Tax Certificate steps and a stable residential and retail market.
Camarillo
Business Tax Certificate steps and the retail, ag, and light-industry market.

//Common questions

Things we get asked first.

Do I need a business license in Ventura County?

Almost always. Each of the county's 10 cities requires a business license or tax certificate before you do business inside it, even if you are based elsewhere or licensed by another city. Businesses conducted in unincorporated areas need a County Business Tax Certificate from the Treasurer-Tax Collector, and some regulated trades also need a Sheriff's Regulatory License.

Sources: Ventura County Clerk-Recorder, New Business Information; County Treasurer-Tax Collector

How do I register a business name in Ventura County?

If you use a name that is not your legal name, file a fictitious business name (DBA) statement with the Ventura County Clerk-Recorder within 40 days of starting business. It costs $76 for one name and one registrant, plus $10 for each additional name or registrant; you can start online but finish in person with your original signature. Publish it within 45 days of filing, once a week for four consecutive weeks in a newspaper of general circulation in the county.

Source: Ventura County Clerk-Recorder, Fictitious Business Name Filing Requirements

How do I open a restaurant in Ventura County?

Beyond your city license or tax certificate, every restaurant and market needs a Permit to Operate from Ventura County Environmental Health, which inspects more than 5,000 food facilities across the county. State law requires plans approved before you build or remodel; submit an application and 3 sets of plans with the fees, or upload them online. An ownership or menu change usually needs plan review too: (805) 654-2813.

Sources: Ventura County Environmental Health, Food Plan Check and Consumer Food Protection

Do I have to file a business property statement?

If your business personal property cost $100,000 or more in total on January 1, or the Assessor asks, yes: it is due April 1, and a late penalty applies after 5 p.m. May 7. Personal property worth $10,000 or less may be exempt from assessment, but you still file if asked. Questions: (805) 654-2181.

Source: Ventura County Assessor, Property Statement Filing

What is the $800 California tax people forget about?

Every California LLC owes the $800 annual tax, even in a year it does no business, until it is cancelled. Corporations owe an $800 minimum franchise tax, but newly incorporated or qualified corporations do not pay it in their first taxable year.

Source: Franchise Tax Board, Limited liability company

Where can I get free help starting my business?

The EDC Small Business Development Center offers one-on-one advising, workshops and in-depth programs at no cost for Ventura County businesses. Use it before you pay a consultant.

Source: EDC Small Business Development Center

//Already operating?

The marketing question starts after the filing question.

If the business is already open, or the launch is funded, tell our founders what you want to change. We will look at the business before recommending SEO, paid media, the website or anything else.

For operating businesses and funded launches with budget available to act on the plan.

//Bookmark these

Official Ventura County and California resources.

Every link here goes straight to a government or nonprofit source. These are the agencies that actually issue your registrations and permits, so go to them directly rather than a paid middleman.

Ventura County Clerk-Recorder: New Business Information
Every Ventura County city's business license office, with its address and phone, plus the county's own permits.
County of Ventura Treasurer-Tax Collector: Business Tax Certificate
Required for every business conducted in the unincorporated areas, with county Planning and Building approvals. (805) 654-3727.
Ventura County Clerk-Recorder: Fictitious Business Name
$76 for one name and registrant, plus $10 for each additional. Start online, sign in person, publish within 45 days. (805) 654-2263.
Ventura County Environmental Health: Consumer Food Protection
Issues Permits to Operate and inspects more than 5,000 food facilities across the county every year.
Ventura County Environmental Health: Food Plan Check
Plans for new construction, remodels, equipment, an ownership change or a menu change. (805) 654-2813.
Ventura County Assessor: Property Statement Filing
File if your business property cost $100,000 or more, or the Assessor asks: due April 1, late after May 7. (805) 654-2181.
EDC Small Business Development Center (free advising)
One-on-one advising, workshops and programs at no cost. 4001 Mission Oaks Blvd, Camarillo, (805) 409-9159.
CA Secretary of State: bizfile Online
Where LLCs and corporations file with the California Secretary of State.
IRS: Get an EIN
Your federal tax ID. Apply online and, if approved, the number is issued immediately. The IRS never charges a fee for an EIN.
CDTFA: Seller's permit
Required if you sell or lease goods that would ordinarily be subject to sales tax. The CDTFA does not charge for it, though it may ask for a security deposit.
Franchise Tax Board: LLC $800 annual tax
Every LLC doing business or organized in California owes the $800 annual tax, even in a year it does no business, until the LLC is cancelled.
Franchise Tax Board: Corporation minimum tax
Corporations owe an $800 minimum franchise tax, but newly incorporated or qualified corporations do not pay it in their first taxable year.
GO-Biz: Permit & Regulatory Assistance
The Governor's Office of Business and Economic Development says it will assist any size company with permitting and regulatory questions.