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San Luis Obispo County, CA Home Business: Signage Rules (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified June 2026

Key Facts

Max Sign Area
2 square feet
Number Allowed
1 identification sign
Illumination
Not allowed
Permit Required
No (exempt under § 22.20.030)
Vehicle Signs
Counted toward 2 sq ft maximum

Summary

Title 22 § 22.30.230.H limits home occupation signage to a single non-illuminated identification sign with a maximum area of two square feet; a commercial vehicle parked on or adjacent to the site that displays the business name counts toward this maximum.

These county ordinances apply to unincorporated areas of San Luis Obispo County. Incorporated cities within the county may have their own rules that take precedence over county-level regulations.

H. Signs. Signage shall be as provided by Chapter 22.20 (Signs) of this title. Signs shall be limited to one non-illuminated identification sign with a maximum area of two square feet, in compliance with Chapter 22.20 (Sign Standards). A commercial vehicle displaying any sign identifying the home occupation and parked on or adjacent to the residential site visible from the public street is included in determining the maximum allowable area of on-site fixed signs.

Full Breakdown

The County's Sign Ordinance update (codified amendment to Title 22 § 22.30.230.H) restricts home occupation signs to one non-illuminated identification sign no larger than two square feet, subject to the general Sign Standards in Chapter 22.20. Importantly, a commercial vehicle parked on or adjacent to the residential site that displays the home occupation name and is visible from the public street is counted in determining the maximum allowable area of on-site fixed signs. Title 22 § 22.20.030.A.11.16 also exempts from permit approval 'residential identification signs' on individual residences and home occupations - including names of occupants and home occupations - 'limited to a total aggregate area of two square feet.' Internally illuminated or freestanding pole signs are not allowed for home occupations.

Violations & Fines

Signs exceeding two square feet, illuminated signs, or vehicle signs that push total signage past the cap are subject to enforcement under Chapter 22.20 and Title 22 abatement procedures.

Frequently Asked Questions

Can my home business sign be lit up?
No. Title 22 § 22.30.230.H requires the identification sign to be non-illuminated. Older County FAQ guidance referenced 'external illumination,' but the codified ordinance now restricts home occupation signs to non-illuminated only.
Does my work truck with my business name count as a sign?
Yes. A commercial vehicle parked on or adjacent to the site displaying the home occupation name and visible from the public street is included in the two square foot maximum.
Do I need a sign permit?
No. Residential identification signs on individual residences and home occupations up to two square feet are allowed without permit approval under Title 22 § 22.20.030.

Sources & Official References

Other rules in San Luis Obispo County

All San Luis Obispo County rules

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