City of Pasadena ADU
Regulations
Everything you need to know about building Accessory Dwelling Units (ADUs) in Alhambra, CA.
Overview
In 2019, the city of Pasadena updated its ordinance regarding accessory dwelling units (ADUs), also known as granny flats. The new law makes it easier for homeowners to build an ADU on their property and helps ensure that these units are safe and up to code.
Building an ADU is a great way to add extra living space to your home, but the process can be complex and confusing. At Vision ADU, we specialize in helping homeowners in Pasadena build beautiful and functional ADUs. We'll work with you to figure out the best design for your needs and budget, pull all the required permits, and manage the construction process from start to finish.
Type of ADUs
The following type of Accessory Dwelling Units (ADUs) are allowed in Pasadena, California.
 Attached ADU
An Attacched ADU connects to an existing house, typically through the construction of an addition along the home’s side or rear.
Max 1,000 sq. ft.
Detached ADU
An Attacched ADU connects to an existing house, typically through the construction of an addition along the home’s side or rear.
Max 1,200 sq. ft.
Garage Conversion
An Attacched ADU connects to an existing house, typically through the construction of an addition along the home’s side or rear.
Max 1,200 sq. ft.
Junior ADU
An Attacched ADU connects to an existing house, typically through the construction of an addition along the home’s side or rear.
Max 500 sq. ft.
Pasadena Property Requirements
Several rules and regulations must be followed when building an ADU in Pasadena. These include:
Number of ADUs Allowed
Single-family lots can build 1 attached ADU or 1 detached ADU with 1 JADU.
Multi-family lots are allowed a maxium of 2 detached ADUs.
ADU Size
850 square feet of floor area for a studio/1 bedroom.
1,000 square feet for 2 bedrooms (no more than two bedrooms are allowed)
Height Limit
The maximum height is 16 feet, measured to the top of the roof ridge, and the unit shall not exceed one story.
Number of Bedrooms Allowed
Pasadena allows 2 bedrooms.
Setbacks
4 feet from the property line is the minimum side and rear setbacks required for an attached or detached ADU. There are no minimum setbacks requirements for garage conversions or JADUs unless it is needed to ensure fire safety.
Parking
1 uncovered or covered parking structure is required unless the property has physical limitations. An alternative parking arrangement may be made subject to a parking waiver in such a case.
Owner Occupancy
JADUs are subject to an owner-occupancy requirement, the property owner must live on the property. All other ADUs built in Pasadena after January 1, 2020, but before January 1, 2025, are not subject to any owner-occupancy requirement.
Rental Guidelines
You can rent out your ADU on a long-term basis. Short-term rentals such as Airbnb or anything less than 30 days may not be allowed in your neighborhood.
Pasadena is a unique city in Southern California that offers a mix of urban and suburban living. The city is home to various businesses, including restaurants, shops, and art galleries. One of Pasadena's most popular tourist attractions is the Rose Bowl, a world-famous stadium that hosts various sporting events, concerts, and other events throughout the year.
