ADU Cost in Los Angeles

Building an ADU in Los Angeles typically costs between $200,000 and $450,000+, depending on the type of ADU, site conditions, design complexity, and utility requirements. Garage conversions and attached ADUs tend to fall on the lower end of the range, while detached and two-story ADUs generally cost more.

What Affects the Cost of an ADU in Los Angeles?

  • Type of ADU – detached, attached, garage conversion, or two-story

  • Size and layout – total square footage, number of rooms, and bathrooms

  • Site conditions – access, grading, utilities, and existing structures

  • Permits and fees – city requirements, school fees, and inspections

  • Design complexity – architectural details, structural upgrades, and finishes

  • Utility upgrades – sewer, electrical, gas, and water connections

Soft Costs to Plan For

In addition to construction costs, ADU projects include soft costs that should be accounted for early in the process.

  • Architectural and design fees

  • Engineering and Title 24 compliance

  • Surveys and site reports

  • Permit and city fees

    Planning for these costs early helps avoid budget surprises later.

Our Perspective at Heart Construction

At Heart Construction, we focus on helping homeowners understand where ADU budgets typically land and how design, scope, and site conditions affect cost. Our goal is to create clear, realistic budgets that align with long-term value, not just initial price.

Planning an ADU?

If you’re considering an ADU in Los Angeles and want a realistic understanding of costs based on your property and goals, a consultation can help clarify the best path forward before major decisions are made.

Contact Heart Construction