How Much Does an ADU Cost in Solana Beach 2025?
Thinking about building an ADU in Solana Beach? In recent years, Accessory Dwelling Units (ADUs) have become one of the most popular ways for homeowners in California to add value, flexibility, and functionality to their property.
But first, what exactly is an ADU? An ADU is a secondary housing unit built on the same lot as your main home. It can take many forms: a detached backyard cottage, a converted garage, or even an attached apartment with its own entrance.
ADUs are ideal for a wide range of needs:
Housing friends & family – Give adult children, aging parents, or guests an independent yet close place to live.
Rental income – Earn passive income by renting your unit long-term or as a short-term rental (if local regulations allow).
Flexible space – Use it as a home office, studio, or retreat that’s separate from your main home.
In Solana Beach, where property values are high and space is at a premium, an ADU can be a smart investment that increases both your lifestyle options and your home’s overall value.
What Impacts the Cost of an ADU in Solana Beach?
The cost of building an ADU in Solana Beach in 2025 depends on several key factors:
Size & Type – Detached units generally cost more than garage conversions or attached units.
Design & Finishes – Custom layouts and high-end materials increase the budget, while simpler finishes keep costs down.
Permits, Regulations & Code Compliance– Solana Beach, like the rest of California, requires permits, fees, and adherence to building codes. This is especially important for areas that weren’t originally built as living spaces.
Construction & Site Work – Foundation work, utility connections, and labor are often the biggest portion of the budget.
On average, homeowners in Solana Beach can expect ADUs to cost between $300 and $500 per square foot in 2025. That means a 400 sq. ft. garage conversion might start around $120,000, while a 1,000 sq. ft. detached ADU with upgraded finishes can easily reach $350,000 or more.
Building an ADU in Solana Beach is a big investment, but one that can add significant value and flexibility to your property. If you’re ready to explore your options, our team can help you plan, design, and build the right ADU for your needs.