Comfortable 3 Bedroom ADU in Fallbrook
Rainbow Heights Road, CA
Homeowner Story: Other
Other Features: Poolside
Special Circumstance: Septic
This Fallbrook ADU is intended as a practical addition designed to provide reliable on-site housing within a rural setting. The goal is to create a comfortable, efficient living space that supports everyday needs while fitting naturally into the existing property. To support the process, the project team partnered with SnapADU for guidance through feasibility, design, and permitting.
The design includes a single-story 1,194 sq ft ADU featuring three bedrooms and two bathrooms. The layout is arranged to balance shared and private spaces, offering flexibility for different living arrangements while maintaining a sense of comfort and functionality. The one-story configuration supports accessibility and ease of movement throughout the home.
Located in the County of San Diego and operating on a septic system, the project requires careful coordination during planning.
Overall, this ADU serves as a dependable housing solution that emphasizes practicality, comfort, and efficient use of space.
Floor Plan:
3BR/2BA 38×31 Long
A large 3BR/2BA ADU under 1200sqft, featuring dual suites and a separate living or dining area, offers versatility for family or rental.
Community:
The County of San Diego Accessory Dwelling Unit Guide
Unincorporated areas are covered by the County of San Diego’s ADU rules and regulations. Additionally, some city properties are subject to County of San Diego ADU rules and regulations. This will depend on whether your city has incorporated the land on which your property is located. In some cities like Vista, San Marcos, Escondido, Oceanside, Encinitas, Del Mar, Chula Vista, El Cajon, Santee, and parts of San Diego, portions are regulated by County of San Diego and not the city. If you don’t know what jurisdiction applies to your property, we can look that up for you in early phases of our discussions.
The County requires in-person submission of plans, which adds some processing time and expense. Review times are moderate. Other agencies that are more proximate to the location of the residence may require input and approval (i.e., local fire agencies). The County has also put out standard floor plans, which some homeowners have found helpful as a starting place for their ADU designs.
