Bolthole Index

San Luis Obispo County, California

Building permits, zoning and septic rules in Arroyo Grande, California

Inside Arroyo Grande, California city limits, the City's Building Division handles building permits, and every accessory dwelling unit needs both an ADU permit and a building permit1. Arroyo Grande administers its own residential and agricultural zoning through its Development Code2. San Luis Obispo County's septic permits apply to unincorporated land, so we could not confirm who permits septic systems inside the city; ask the Building Division before you plan one3.

At a glance

Building permit
City permit through the Building Division; ADUs need an ADU permit and a building permit1
Zoning
City Development Code with residential (RS) and agricultural (AG, AP) districts2
Minimum lot (RS)
12,000 square feet for new subdivisions4
Agricultural parcels
10 gross acres minimum in AG and AP5
Maximum height (RS)
30 feet or 2 stories, whichever is less6
Tiny home on wheels
Must connect to city water and sewer7
Septic inside city
Not confirmed; the county permits septic only in unincorporated areas8

Who to call

Building permits

City of Arroyo Grande Building Division

Building permits and inspections inside Arroyo Grande city limits; inspections line 805-473-5454

805-473-5450

300 E. Branch Street, Arroyo Grande, CA 93420

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Off-grid gear

Going off-grid in Arroyo Grande means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Arroyo Grande, California?

Yes, for building work inside city limits, and the City's code is explicit for accessory dwellings: every ADU and junior ADU requires an ADU permit and a building permit1. The City publishes building permit and inspection fees that vary by occupancy type and square footage rather than one flat amount9. A certificate of occupancy can be a condition of approval for projects that come with city conditions, but we could not confirm a general rule for all buildings10. We also could not confirm a city owner-builder exemption or a general inspection schedule; ask the Building Division11.

Who issues building permits in Arroyo Grande, and how do you reach them?

The City of Arroyo Grande's Building Division, part of Community Development at 300 E. Branch Street, is the office for building permits and inspections inside city limits; call 805-473-5450, or 805-473-5454 for inspections11. San Luis Obispo County's Planning & Building Department issues permits only in unincorporated areas, so it is not the office for a lot inside Arroyo Grande12. Septic and wells are separate questions covered below.

Does Arroyo Grande have zoning, and what does it mean for lots, height and setbacks?

Arroyo Grande's Development Code sets residential and agricultural zoning districts inside city limits2. In the RS single-family district the minimum building site is 12,000 square feet for new subdivisions, and sloping terrain can require a larger lot4. RS buildings may not exceed 30 feet or 2 stories, whichever is less, and accessory buildings are limited to 14 feet6. In the AG and AP agricultural districts the minimum parcel size is 10 gross acres5, buildings are limited to 30 feet13, and setbacks are 50 feet front and rear and 30 feet interior and street side14. Existing agricultural operations are exempt from the creek setback standards, but not from other zoning, building, floodplain or environmental requirements15.

Can you live in an RV or tiny home in Arroyo Grande?

Not in the street. An RV may not be used for living or sleeping in a city public right-of-way beyond 72 continuous hours, and then only under sanitary-facility and consent conditions16. Overnight camping or RV occupancy for designated community activities needs the police chief's approval and lasts at most five days17. Tiny homes on wheels must connect to city water and sewer, may be off-grid for electricity and gas only if the building official sees adequate heating and power, and may not use gas generators7. A tiny home on wheels cannot be a short-term rental of less than 30 days18. We could not confirm a rule for living in an RV on a private lot; ask the Building Division11.

How do septic permits work in Arroyo Grande?

We could not confirm who permits septic systems inside Arroyo Grande city limits. San Luis Obispo County's onsite wastewater (septic) permit requirement is written for unincorporated areas under County jurisdiction3, and tiny homes on wheels inside the city must use the city sewer7. Because the county rule covers unincorporated land only, call the Building Division before assuming a septic system is an option on a lot inside the city11. Soils are also a constraint: about 10% of San Luis Obispo County soils lack severe limits for a conventional drain field19.

Building a home in Arroyo Grande: the steps, in order

  1. Confirm the lot's district in the Development Code and check lot size, height and setbacks2.
  2. Ask the Building Division how the lot will be served by sewer, since septic authority inside the city is unconfirmed11.
  3. Review the City's published building permit and inspection fees9.
  4. For an ADU, apply for both the ADU permit and the building permit1.
  5. Schedule inspections through the Building Division11.

What stays with San Luis Obispo County, and what to check before you buy

The City, not San Luis Obispo County, administers zoning and building permits inside Arroyo Grande2. County rules on RVs, tiny houses, accessory dwellings and short-term rentals apply to unincorporated land and should not be assumed for a city lot20. For a new well, the county requires a permit for construction of a new water well anywhere in San Luis Obispo County21. Typical home values are county-level: about $911,459 in San Luis Obispo County22.

Watch-outs

  • We could not confirm who permits septic systems inside Arroyo Grande city limits; the county's septic rule is written for unincorporated areas3.
  • Tiny homes on wheels inside the city must connect to city water and sewer7.

Sources

  1. library.municode.com (Arroyo Grande), quoted and re-checked
  2. Residential site development standards (Arroyo Grande), quoted and re-checked
  3. County of San Luis Obispo Local Agency Management Program, quoted and re-checked
  4. Residential site development standards (Arroyo Grande), quoted and re-checked
  5. Agricultural district development standards (Arroyo Grande), quoted and re-checked
  6. Residential site development standards (Arroyo Grande), quoted and re-checked
  7. Tiny homes on wheels (Arroyo Grande), quoted and re-checked
  8. County of San Luis Obispo Local Agency Management Program, quoted and re-checked
  9. Comprehensive Fee Schedule FY 2025-26 (Arroyo Grande), quoted and re-checked
  10. City resolution and conditions of approval (Arroyo Grande), quoted and re-checked
  11. City of Arroyo Grande Building Division (arroyogrande.org)
  12. Frequently Asked Questions for Building (Construction) Permits, quoted and re-checked
  13. Agricultural district development standards (Arroyo Grande), quoted and re-checked
  14. Agricultural district development standards (Arroyo Grande), quoted and re-checked
  15. Floodplain management and creek protection (Arroyo Grande), quoted and re-checked
  16. Parking of recreational vehicles on city streets (Arroyo Grande), quoted and re-checked
  17. Camping exceptions (Arroyo Grande), quoted and re-checked
  18. Tiny homes on wheels (Arroyo Grande), quoted and re-checked
  19. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  20. Codes and Ordinances, quoted and re-checked
  21. Water Well Construction Permitting, quoted and re-checked
  22. Typical home value (Zillow): Bolthole Index county data

Written October 10, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Answers from the rulebook for Arroyo Grande

Arroyo Grande’s own rules

  • Building permitRequired

    Every ADU and JADU inside Arroyo Grande city limits.

    • The requirement is specifically for ADUs and JADUs; this claim does not establish the permit rule for every type of construction.
    “Every ADU and JADU requires an ADU permit and a building permit. The city will review and approve permit applications in accordance with subsection D.3 below.”
  • Certificate of occupancyLimited

    Projects subject to city conditions of approval inside Arroyo Grande city limits.

    • The cited condition applies before issuance of a certificate of occupancy for that approved project; it does not establish a universal certificate-of-occupancy requirement for all buildings.
    “Prior to issuance of a certificate of occupancy, the applicant shall post handicapped parking, per Police Department requirements.”
  • Local zoningPresent

    Land inside Arroyo Grande city limits; the city administers residential and agricultural zoning districts through its Development Code.

    “The following property development standards shall apply to all land and permitted, or conditionally permitted buildings located within their respective residential districts.”
  • Minimum lot sizeSpecified

    RS single-family residential district.

    • The table states a 12,000-square-foot minimum building site for new subdivisions.
    • The code notes that sloping terrain may require increased lot size under Table 16.20.050-A.

    minimum building site: 12000 square feet (new subdivisions; reduced minimum may apply for sensitive habitat/open-space/steep-slope conditions)

    “Minimum building site a (Net area in sq. ft.) new subdivisions 92,500;sup\sup; 49,000 40,000 12,000 (reduced minimum building site area allowed with provision to permanently preserve sensitive habitat and/or open space corridors and/or to avoid development of steep slopes and ridgelines) 7,200 6,750”
    One more reviewed finding on this topic
  • SetbacksSpecified

    AG and AP agricultural districts.

    • The agricultural standards table applies to agricultural development projects.

    front setback: 50 feet · rear setback: 50 feet · interior side setback: 30 feet · street-side setback: 30 feet

    “4. Minimum front yard building setback 50″* 50″* 5. Minimum rear yard building setback 50″* 50″* 6. Minimum interior side yard setback 30″* 30″* 7. Minimum street side yard setback 30″* 30″*”
  • Building heightSpecified

    RS single-family residential district.

    • The maximum is whichever is less: 30 feet or two stories.
    • Accessory buildings are limited to 14 feet.

    maximum building height: 30 feet or 2 stories (whichever is less; accessory buildings 14 feet)

    “10. Maximum height for buildings and structures 30′ or 2 stories, whichever is less, 14′ for accessory buildings.”
    One more reviewed finding on this topic
  • Living in an RVLimited

    Recreational vehicles parked or used for living or sleeping in public rights-of-way inside Arroyo Grande city limits.

    • Parking in a city public right-of-way may not exceed 72 continuous hours.
    • No RV may be parked where the police chief or designee determines it obstructs visibility or creates a traffic hazard.
    • Living or sleeping in a city public right-of-way is subject to sanitary-facility and consent conditions and may not exceed 72 continuous hours.

    maximum public-right-of-way parking period: 72 hours

    “No recreational vehicle shall be used for living or sleeping purposes within a public right-of-way of the city, unless such recreational vehicle is parked in front of a property that is improved with a dwelling lawfully occupied and with the express consent of the occupant thereof and where the occupant has made available to the recreational vehicle occupants convenient and adequate sanitary and toilet facilities at all times. In no case shall a recreational vehicle be used for living or sleeping purposes within a public right-of-way for a continuous period exceeding seventy-two (72) hours.”
  • Camping on your landLimited

    Overnight camping or overnight recreational-vehicle occupancy for designated community activities inside Arroyo Grande city limits.

    • Approval of the chief of police is required.
    • The maximum duration is five days.

    maximum duration: 5 days

    “Limited overnight camping or overnight occupancy of a recreational vehicle may be permitted for designated community activities subject to the approval of the chief of police. Such limited overnight camping and/or recreational vehicle use shall be for a maximum of five days.”
  • Mandatory utility hookupWater and sewer (with conditions)

    Tiny homes on wheels used as residential units inside Arroyo Grande city limits.

    • The THOW must be connected to city water and sewer utilities in compliance with the municipal code.
    • Electrical and gas service may be off-grid if adequate heating and electrical power is demonstrated to the building official.
    • Gas-powered generators are not allowed as the means of providing electricity.
    “The THOW shall be connected to city water, and sewer utilities in compliance with the municipal code. A tiny home may be off grid for electrical and gas if it can be demonstrated that the unit has adequate heating and electrical power to the satisfaction of the building official. Gas powered generators are not allowed as a means to provide electricity to a THOW.”
  • Agricultural exemptionConditional

    Existing agricultural operations subject to Arroyo Grande creek setback standards.

    • The exemption applies to creek setback standards established in Section 16.44.050.
    • It does not establish exemption from other zoning, building, floodplain, or environmental requirements.
    “Existing agricultural operations are exempt from creek setback standards established herein.”
  • Short-term rentalsLimited

    Qualifying tiny homes on wheels inside Arroyo Grande city limits.

    • The restriction applies to rentals of less than 30 days.

    minimum rental period: >= 30 days

    “A THOW shall not be utilized as a short-term rental of less than thirty (30) days.”
  • Permit feesPublished (with conditions)

    City building-permit and inspection fees inside Arroyo Grande city limits.

    • The schedule lists FY 2025-26 and FY 2026-27 fee columns.
    • Fees vary by CBC occupancy/use type and square footage; the cited schedule is not a single universal fee.
    “BUILDING PERMIT FEES CBC (ICC) Use Type Occupancy Square Footage FY 2025-26 Plan Check Fee (Base Fee) FY 2025-26 Inspections Fee (Base Fee) FY 2025-26 Combined Total Fee (Base Fee)”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Arroyo Grande or San Luis Obispo County directly.

  • Owner-builder exemption — Owner-builders seeking construction permits inside Arroyo Grande city limits.
  • Inspections — Building inspections for construction inside Arroyo Grande city limits.
  • Minimum dwelling size — General dwellings in Arroyo Grande city residential districts.
  • Who permits septic — Onsite wastewater systems inside Arroyo Grande city limits.
  • Septic permit — New or repaired septic systems inside Arroyo Grande city limits.
4 more unanswered
  • Septic inspection
  • Off-grid sanitation
  • Subdividing land
  • Driveway access

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Unanswered questions are usually a sign that Arroyo Grande publishes no rule on the point, not that none exists. San Luis Obispo County’s page lists the county offices to call.

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