ADU Construction Timeline in Los Angeles

Building an ADU in Los Angeles typically takes 6 to 12 months from initial planning through completion. The timeline depends on factors such as permitting requirements, whether the ADU is attached or detached, site conditions, and design readiness.

The ADU Construction Timeline: Step by Step

  • Design & planning: 1–2 months

  • Permits & approvals: 2–6+ months depending on jurisdiction

  • Construction: 3–6 months depending on scope and site conditions

    While ADUs are typically faster to build than custom homes, early planning and clear documentation are essential to keeping the process moving efficiently.

What Can Affect an ADU Timeline?

  • City permitting and plan checks – review timelines and resubmittals

  • Attached vs detached ADUs – structural complexity and inspections

  • Garage conversions – existing conditions and utility upgrades

  • Utility connections – sewer, electrical, and gas requirements

  • Site access and layout – tight lots or shared driveways

  • Design changes – revisions during review or construction

Our Perspective at Heart Construction

At Heart Construction, we approach ADU timelines with clarity and realism. Our goal is to help homeowners understand each phase, anticipate potential delays, and make informed decisions that keep the project moving smoothly from start to finish.

Planning an ADU?

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

Contact Heart Construction