FRequently asked questions

Below are answers to the most common questions homeowners ask when considering an ADU — from eligibility and cost to timelines and the permitting process.

GEneral questions

  • An Accessory Dwelling Unit (ADU) is a self-contained residential unit built on the same lot as a primary home. It includes its own kitchen, bathroom, living space, and separate entrance.

  • A Junior Accessory Dwelling Unit (JADU) is a smaller unit (typically up to 500 sq. ft.) created within the existing footprint of a home, often with a shared bathroom.

  • The main differences are size, ownership requirements, and layout. ADUs can be up to 1,200 sq. ft. and fully independent. JADUs are limited to 500 sq. ft., must be within the existing structure, and typically require owner occupancy.

Types of adus

  • Common ADU types include:

    • Garage Conversion ADUs

    • Attached ADUs

    • Detached (Ground-Up) ADUs

    • JADUs

  • A garage conversion transforms an existing garage into a legal living unit. It’s often the fastest and most cost-effective ADU option since the structure already exists.

  • An attached ADU is built as an addition to the main house, sharing at least one wall. It offers flexibility in size and layout while maintaining a cohesive footprint.

  • A detached ADU is a standalone structure, typically built in the backyard. It offers maximum privacy and rental potential but usually has higher construction costs.

BENEFITS + Value

  • ADUs can generate rental income, increase property value, provide housing for family members, or serve as a home office or guest space.

  • Yes. In most cases, ADUs can be rented long-term. Short-term rentals may be restricted depending on local regulations.

  • In many cases, yes. ADUs can significantly increase resale value and appeal, especially in high-demand areas like Los Angeles.

COSTS + PRICING

  • Costs vary by type and size. Typical ranges:

    • Garage Conversion: ~$160k–$210k

    • Attached ADU: ~$150k–$280k

    • Detached ADU: ~$220k–$300k+

  • Key factors include square footage, site conditions, utility connections, structural upgrades, finishes, and local requirements.

  • Yes. Our pricing includes architectural and engineering plans prepared for city approval. City fees and permit costs are typically separate.

  • Most single-family and multi-family properties in California qualify, but eligibility depends on lot size, zoning, setbacks, and existing structures.

  • In many cases, no. California law has eliminated parking requirements for ADUs near transit or when converting existing structures.

  • Owner-occupancy requirements vary. For most ADUs, owner occupancy is currently not required, but JADUs typically do require it.

REquirements + zoning

PROCESS + TImeline

  • The typical process includes:

    1. Site evaluation

    2. Design & planning

    3. City approval

    4. Construction

    5. Final inspection & occupancy

  • Timelines vary by project type:

    • Garage conversions: ~5–7 months

    • Attached or detached ADUs: ~7–12 months

  • Approval timelines vary by city but are often faster for garage conversions and standard ADU designs.

  • Not always. Some ADUs can share utilities with the main house, while others require separate meters depending on size and local requirements.

  • Yes. ADUs can be customized to fit your needs, budget, and design preferences while meeting city requirements.

UTILITIES + LIVING DETAILS

GETTING STARTED

  • The first step is a site assessment to determine feasibility, costs, and the best ADU option for your property.

  • Yes. We manage the full process—from design and permits to construction and final sign-off :)

Start With a Free ADU Feasibility Review

Zoning, cost range, and next steps - before you commit

See If My Property Qualifies