ADU Knowledge
June 8, 2024

Can you build an ADU in Santa Barbara?

Argi Avetisyan
Argi Avetisyan
Gather ADU expert
Can you build an ADU in Santa Barbara?
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Building an Accessory Dwelling Unit (ADU) offers a fantastic way for homeowners to increase their property value, create additional living space, and generate rental income. For those residing in Santa Barbara, the opportunity to construct an ADU is both promising and rewarding. This comprehensive guide will explore the types of ADUs available, the unique housing challenges in Santa Barbara, and the steps required to build an ADU.

Types of ADUs

Santa Barbara ADU

Understanding the different types of ADUs is crucial in determining which option best suits your property and lifestyle.

Junior Accessory Dwelling Unit (JADU)

A Junior ADU (JADU) is a smaller ADU, typically not exceeding 500 square feet. It must be within an existing single-family home or accessory structure, such as a garage. JADUs may share a bathroom with the main residence and are only required to meet "efficiency kitchen" standards.

Accessory Dwelling Unit (attached/detached)

Detached ADUs are standalone buildings separate from the primary residence, while attached ADUs involve adding on to an existing single-family home. ADUs generally do not exceed 1,200 square feet.

Attic Conversion

An attic conversion transforms unused attic space into a livable unit complete with necessary amenities. This type of ADU provides extra living space or rental opportunities without altering your home's footprint, thus enhancing functionality and potentially increasing property value.

Basement Conversion

A basement conversion ADU turns your lower level into a self-contained living area. This option is ideal for renting out or housing family members, offering added privacy and utility without changing the home's exterior structure.

Garage Conversion

A garage conversion ADU repurposes your garage into a separate, functional living unit. It leverages underutilized space, potentially increasing property value and utility while preserving the home's external façade.

SB9 Lot Split

California's SB9 enables homeowners to split their single-family lot, allowing the construction of up to four residential units. This maximizes land use, increases housing availability, and offers potential income streams, all while adhering to local zoning regulations. Consult Our Experts

Unique Housing Challenges in Santa Barbara

Santa Barbara faces unique housing challenges such as limited land availability, high property prices, and stringent zoning laws. ADUs offer a solution by maximizing existing land use and providing affordable housing options, thus addressing the area's housing crisis.

Development Standards for an ADU

Knowing what’s allowed on your property is essential:

  • Setbacks: A minimum 4-foot setback from the rear and side yard is required for ADUs.
  • Square Footage: ADUs can be up to 1,200 square feet.
  • Height: Generally, ADUs can be one story and 16 feet in height.
  • Parking: Conversion ADUs and JADUs typically do not require parking; attached and detached ADUs usually require one parking space.
  • Number of ADUs Allowed: Single-family homes can have one or two ADUs. The number for multi-family properties varies.
  • Minimum Lot Size: No minimum lot size restrictions exist.
  • Allowed Locations: ADUs are generally allowed if residential uses are permitted on the property.
  • Renting the ADU: ADUs can be rented out, but short-term rentals are generally not allowed.

Permitting Process for an ADU

Building Permit Applications

ADUs are typically permitted by submitting to the Building & Safety Division for a building permit review. If all applicable codes and ordinances are met, the project will be approved.

Optional Planning Applications

Property owners can submit a planning application for variations of architectural review criteria or request zoning exceptions and modifications. Planning review must be completed before submitting a building permit application.

Optional Pre-Applications

You can apply for a Preliminary Zoning Plan Check to review conceptual drawings for zoning compliance before submitting complete plans for a building permit.

Coastal Zone Review

If a Coastal Development Permit is required, you must complete the planning approval process before submitting a building permit application. An Exemption or Exclusion may be submitted concurrently with a building permit application.

What to Submit

Complete the Accessory Dwelling Unit supplemental application along with a complete Building Permit (BLD) Application or Planning (PLN) Application. All applications are accepted online and must include all supporting materials.

Multiple Units

Single-Unit Residential

You can convert a portion of the primary residence to a JADU, plus one new construction Special ADU that is detached from any other building.

Multi-Unit Residential

You can either:

  • Construct two new Special ADUs, detached from any other buildings.
  • Convert up to 25% of the existing number of residential units on a lot, contained within non-livable spaces like storage rooms or basements.

Owner-Occupancy

Owner-occupancy is not required for new ADU applications for five years (until January 2025). However, for JADUs, the property owner must reside in either the primary residential unit or the JADU.

Fire Hazard Areas

Smaller Special ADUs or JADUs are allowed in Extreme Foothill/Foothill Fire Hazard Areas. All new construction ADUs in any Fire Hazard Area must meet high-fire construction and defensible space regulations.

Removing Existing Parking

If an existing garage or covered parking structure is converted or demolished for an ADU, those spaces are not required to be replaced.

Consult Our Experts

Design and Construction Process

ADU Construction Process

The design and construction process involves several steps:

  • Planning and Permitting: Submit your ADU plans for approval to the City of Santa Barbara, including any necessary coastal zone reviews.
  • Construction: Once approved, construction can commence, with a focus on maximizing space and aesthetics.
  • Inspection and Final Approval: After construction, the ADU must pass inspections to ensure compliance with local building codes.

Impact on Property Value and Housing Market

ADUs can significantly increase property value by providing additional living space and rental income potential. They also contribute to the local housing market by offering affordable housing options and reducing the strain on existing housing resources.

Environmental and Social Benefits

ADUs promote sustainable living by minimizing the need for new land development and encouraging efficient use of existing spaces. They also foster community development by increasing housing availability and providing affordable living options.

Call to Action

Ready to explore the potential of building an ADU on your property? Contact us today to learn more about the process, cost, and benefits. Enhance your living space and create new opportunities with an ADU in Santa Barbara.

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