Prefab ADU in Atherton - Backyard Home Solutions with LiveLarge

Atherton ADU Standards

Prefab ADU in Atherton

Since implementing its ADU regulations, Atherton has seen a surge in interest for accessory dwelling unit (ADU) development. Whether you are considering a prefab ADU, modular home, or tiny home, LiveLarge Home is here to guide you through the essential standards to ensure your project is a success.

Types of ADUs:

Attached ADUs: Extensions or conversions of existing structures, offering a seamless integration with the main home.
Detached ADUs: New, independent buildings, perfect for prefab ADUs or modular homes that are designed for maximum flexibility.

Zoning and Lot Size:

ADUs are allowed in all residential zoning districts.
There is no minimum lot area requirement, offering ample opportunities for various types of ADUs, including compact tiny homes.

ADU Size:

Maximum Size: 1,200 sq. ft.
Floor Area: For attached units, the increase cannot exceed 50% of the primary dwelling’s size, with a maximum of 1,200 sq. ft. This regulation applies to modular homes and prefab ADUs as well.

Height Regulations:

Attached ADUs: Must remain within the height of the existing structure.
Detached ADUs: Limited to 16 feet in height, ensuring a balanced integration with the property, especially for modular and prefab ADUs.

Setbacks:

Attached ADUs: No additional setbacks required beyond the main residence.
Detached ADUs: Minimum of 5 feet from side and rear yards; must meet specific zoning district requirements, which can affect tiny homes or modular homes built on the property.

Parking Requirements:

One parking space is required per bedroom unless the ADU is within ½ mile of public transit, part of the existing primary residence, or located in specific conditions such as a historic district. This can be particularly beneficial for smaller prefab ADUs or tiny homes.

Entryways:

All ADUs, including modular homes and prefab ADUs, must have independent exterior access to maintain privacy and functionality.

For more detailed guidance on building prefab ADUs, modular homes, or tiny homes in Atherton, consult with local zoning officials or reach out to a LiveLarge ADU expert. Let us help you transform your property with a thoughtfully planned and designed ADU today!