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Planning & Building

County of San Luis Obispo

Inland Accessory Dwelling Unit

There are five (5) different types of Accessory Dwelling Unit options depending on the home or multi-family dwelling.

 

Review ADU Types

  • Click on an ADU development type in the table below for development specific standards.

 

Refer to Frequently Asked Questions Below

  • Click on the Frequently Asked Questions at the bottom of this page.

 

Read Full Text of the Inland ADU Ordinance

 

ADU DEVELOPMENT TYPES

 

Sites with an existing or proposed

SINGLE-FAMILY DWELLING (SFD)

Sites with an existing or proposed

MULTI-FAMILY DWELLING (MFD)

One (1)

Additional Accessory Dwelling Unit

Proposing one ADU or JADU within:

  • A proposed SFD;
  • An existing SFD; or
  • An existing accessory structure, such as a garage

Max. ADU size: 1,000 sq. ft.

Max. JADU size: 500 sq. ft.

 

See “TYPE A

for development type specific standards

See “TYPE C” or “TYPE D

for development type specific standards

Proposing one attached or detached ADU:

Max. size: 1,200 sq. ft.

 

See “TYPE E
for development type specific standards

Up to Two (2)

Additional Accessory Dwelling Units

Proposing one attached JADU and 1 detached ADU:

Max. ADU size: 800 sq. ft.

Max. JADU size: 500 sq. ft.

 

See “TYPE B

for development type specific standards

Proposing two or less detached ADUs:

Max. size: 1,000 sq. ft.

 

 

See “TYPE D

for development type specific standards

More Than

Two (2)

Additional Accessory Dwelling Units

----------

Proposing multiple ADUs within existing MFD:

Min. number of ADUs: One

Max. number of ADUs: 25% of existing dwellings

Max. ADU size: 1,000 sq. ft.

 

See “TYPE C

for development type specific standards

Frequently Asked Questions