Changing ADU Rules in California
Ken Kaplan broke down the latest on SB 9 and SB 10, which now allow homeowners to build up to four and even ten units on a single-family lot depending on conditions like lot size and available parking. While these laws were originally designed to help ease the housing crisis, we’re now seeing concerns about unintended consequences. Overdevelopment is becoming an issue in neighborhoods not designed to support multi-unit density. Local governments are beginning to respond, and we may soon see limits on size, height, and the number of allowable units per lot. My advice? If you’re considering building an ADU, consult with your local city officials or hire an architect who understands the nuances of current regulations. Acting now could mean the difference between opportunity and red tape later.

Property Spotlight: Skyline Neighborhood Deal
We toured a fantastic remodeled property in the Skyline neighborhood—an ideal example of how ADUs can add value without overwhelming a space.

• Main Home: 3 bedrooms, 2 bathrooms
• Interior Size: 1,429 square feet
• Lot Size: 5,700 square feet
• ADU: Separate 1-bedroom, 1-bath unit
• Price: $699,000

This home features a modern open floor plan and was completely remodeled within the last six months. With rental income potential from the ADU, it’s a smart buy for homeowners or investors looking to offset mortgage costs. This is the kind of well-balanced ADU development that truly works.

Luxury Living: The Sand Castle in La Jolla
On the high end of the market, we showcased one of the most exclusive homes ever featured—The Sand Castle in La Jolla.

• Bedrooms: 10
• Bathrooms: 17
• Interior Size: Just under 13,000 square feet
• Land: Two separate parcels
• Private Beach Access: Protected by a 1955 seawall
• Price: $108 million

The home, designed by Tim Corrigan and Drex Patterson, is an architectural masterpiece inspired by French and Italian styles. It includes crystal chandeliers, marble floors, saltwater pools, a tea garden, an elevator, and unmatched beachfront privacy. It’s a true statement in luxury living.

Streamlining ADU Builds in San Marcos
If you’re looking to simplify the ADU process, San Marcos is leading the way. The city now offers pre-approved ADU floor plans, which allow homeowners to select from vetted designs and speed up the permitting process. This initiative helps reduce planning costs and ensures that the structures conform to neighborhood standards—preventing the “backyard apartment complex” effect that’s frustrating so many residents across the state.

Concerns About Overbuilding
As ADU rules become more permissive, some homeowners are pushing the limits. Large-scale backyard construction threatens to alter the fabric of traditional residential neighborhoods. Ken made it clear: while we need more housing, it has to be done responsibly. There’s a fine line between increasing housing supply and undermining the very communities we’re trying to improve. Future rollbacks may aim to strike this balance.

Final Thoughts for Homeowners
If you’re even thinking about adding an ADU, now is the time to act. Familiarize yourself with your city’s current rules. Understand setbacks, height restrictions, and maximum unit sizes. These rules are still evolving, and acting before further restrictions come down could give you a major advantage. Just as important—work with professionals. A qualified designer or architect who knows the local codes can help you avoid costly missteps and navigate the permitting process smoothly.

In today’s real estate landscape, being informed isn’t optional—it’s essential. Whether you’re upgrading your home or planning your next big investment, staying ahead of changing ADU laws could be the key to unlocking long-term value.

The post The Truth About ADUs: How California’s Changing Rules Could Affect Your Property and Investment Plans appeared first on ROI TV.