How Big Can You Build an ADU in Los Angeles?

adu size limit los angeles accessory dwelling unit maximum size requirements

Introduction

Many homeowners in Los Angeles want to know how large they can build an accessory dwelling unit (ADU) on their property.

Understanding ADU size limits helps homeowners plan their design, layout, and overall investment before starting construction.

Maximum ADU Size in Los Angeles

In most cases, detached ADUs in Los Angeles can be built up to 800 to 1,200 square feet, depending on the property and local regulations.

Smaller ADUs may be easier to approve, while larger units require more planning and compliance with city requirements.

Factors That Affect ADU Size

Several factors determine how large your ADU can be.

Lot Size

Larger properties typically allow for larger ADUs.

Zoning Regulations

Local zoning laws determine size limits, setbacks, and height restrictions.

Type of ADU

Different types of ADUs have different size allowances.

• Detached ADU
• Attached ADU
• Garage conversion ADU
• Junior ADU (JADU)

Setback and Height Requirements

ADUs must meet setback rules, which determine how far the structure must be from property lines.

Height limits also apply depending on the type of ADU and location.

Design Considerations for ADU Size

Maximizing space within the allowed size is key to creating a functional ADU.

Open layouts, large windows, and efficient storage solutions help make the unit feel larger.

Work With an Experienced ADU Contractor

Re-Masters Remodeling helps homeowners design ADUs that meet local regulations while maximizing space and functionality.

We proudly serve:

• Los Angeles
• Santa Clarita
• San Fernando Valley
• Antelope Valley

Start Your ADU Project

If you're planning to build an ADU, our team can help determine the best size and layout for your property.

Request your free remodeling estimate today.