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Sonoma County, California · Personal and public records

Register a business name (DBA / FBN) in Sonoma County

Find the right county provider, filing options, fees and publication requirements for a fictitious business name.

1 provider · 1 official link · 10 reviewed requirements · sources checked October 15, 2026

In Sonoma County, 1 county department publishes 1 official link for this service. Reviewed requirements cover deadlines (4), documents (3), eligibility (2) and availability notices (1). 1 provider publishes reviewed fee items and 1 provider lists forms on its guide.

These are the Sonoma County providers with a reviewed service link for this task. Other offices may also help, and a provider may serve only part of the county: check each service area. Fees and forms stay on each office’s guide, where their sources are cited.
County government

Clerk-Recorder

FBN / DBA filing instructions (opens in a new tab)Official instructions

Use the county’s official FBN portal or statement form and review publication and filing fees. Older residence-address text is not used as a current owner-address requirement. Private renewal solicitations are not county filing fees.

Availability · Direct filing option
You can file directly with the County Clerk instead of paying a private renewal service.
Source & saved evidence

Sonoma County — business name filing · Sonoma — fictitious business name instructions (opens in a new tab)

FBN requirement — Direct filing option

Business owners can deal directly with the County Clerk’s Office when filing.

Agent source review: October 15, 2026 · Snapshot 079fac048f009c51

Before you start · 9 requirements & conditions
Deadlines · Initial filing — state deadline
File within 40 days after starting business under the fictitious name.
Source & saved evidence

California Legislature · Business and Professions Code 17910 — fictitious business names (opens in a new tab)

BPC §17910(a)

File a fictitious business name statement in accordance with this chapter not later than 40 days from the time the registrant commences to transact such business.

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Eligibility & access · Where to file — principal place of business
File in the county of your principal California business location. If you have no California business location, file in Sacramento County.
Source & saved evidence

California Legislature · Business and Professions Code 17915 — fictitious business names (opens in a new tab)

BPC §17915

A fictitious business name statement shall be filed with the clerk of the county in which the registrant has his or her principal place of business in this state or, if the registrant has no place of business in this state, with the Clerk of Sacramento County.

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Deadlines · New or changed filing — newspaper publication
Start publication within 45 days after filing. Use a qualifying newspaper in the filing county, or an adjoining county if no qualifying newspaper exists there.
Source & saved evidence

California Legislature · Business and Professions Code 17917 — fictitious business names (opens in a new tab)

BPC §17917(a)

Within 45 days after a fictitious business name statement has been filed pursuant to this chapter, the registrant shall cause a statement in the form prescribed by subdivision (a) of Section 17913 to be published pursuant to Section 6064 of the Government Code in a newspaper of general circulation in the county where the fictitious business name statement was filed or, if there is no such newspaper in that county, in a newspaper of general circulation in an adjoining county.

Agent source review: October 15, 2026 · Snapshot 36dc0646686452ab

Information & documents · Newspaper notice — publication frequency
Publish once a week for four successive weeks.
Source & saved evidence

California Legislature · California — FBN publication-frequency (opens in a new tab)

Government Code §6064

Publication of notice pursuant to this section shall be once a week for four successive weeks.

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Deadlines · After publication — file the affidavit
File the publication affidavit with the County Clerk within 45 days after publication is completed. Check whether your newspaper files it for you.
Source & saved evidence

California Legislature · Business and Professions Code 17917 — fictitious business names (opens in a new tab)

BPC §17917(d)

An affidavit showing the publication of the statement shall be filed with the county clerk where the fictitious business name statement was filed within 45 days after the completion of the publication.

Agent source review: October 15, 2026 · Snapshot 36dc0646686452ab

Deadlines · Expiration — earlier changes or abandonment can end the statement
A statement generally lasts five years, but changes or abandonment can end it earlier.
Source & saved evidence

California Legislature · Business and Professions Code 17920 — fictitious business names (opens in a new tab)

BPC §17920(a)

Unless the statement expires earlier under subdivision (b) or (c), a fictitious business name statement expires five years from the date it was filed in the office of the county clerk.

Agent source review: October 15, 2026 · Snapshot c96f9d2f6a89b488

Eligibility & access · No-change renewal — publication exception
An unchanged renewal filed within 40 days after expiration does not need republication. Changes can require a new publication.
Source & saved evidence

California Legislature · Business and Professions Code 17917 — fictitious business names (opens in a new tab)

BPC §17917(c)

If a refiling is required because the prior statement has expired, the refiling need not be published unless there has been a change in the information required in the expired statement, provided the refiling is filed within 40 days of the date the statement expired.

Agent source review: October 15, 2026 · Snapshot 36dc0646686452ab

Information & documents · California principal business location
Provide the street address and county of the principal business location. A registrant’s separate mailing-address rule does not remove this requirement.
Source & saved evidence

California Legislature · Business and Professions Code 17913 — fictitious business names (opens in a new tab)

BPC §17913(b)(2)

If the registrant has a place of business in this state, insert the street address, and county, of the registrant’s principal place of business in this state.

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Information & documents · Individual registrant — owner mailing address
For an individual owner, provide the full name and business mailing address if different from the business address. Do not apply older blanket residence-address instructions.
Source & saved evidence

California Legislature · Business and Professions Code 17913 — fictitious business names (opens in a new tab)

BPC §17913(b)(3)

If the registrant is an individual, insert the registrant’s full name and business mailing address if it differs from the business address.

Agent source review: October 15, 2026 · Snapshot b3d613c6d589c6c1

Source & saved evidence

Sonoma County — business name filing · Sonoma — fictitious business name instructions (opens in a new tab)

Fictitious business name — Fictitious Business Name

Fictitious Business Name

Agent source review: October 15, 2026 · Snapshot 079fac048f009c51

Address
585 Fiscal Drive Room 103 Santa Rosa, CA 95403
Hours
Monday – Tuesday 8:00 AM – 5:00 PM Wednesday 8:00 AM – 4:00 PM Thursday – Friday 8:00 AM – 5:00 PM Note: No fee transactions or document processing within 30 minutes of closing

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