1. Look for Experience and Expertise
Not all builders are created equal, and ADU construction has unique challenges. You want a builder who understands local zoning laws, permit processes, and construction standards. Experienced builders can help you navigate regulations, avoid costly mistakes, and recommend designs that fit your property’s layout. Ask about their past ADU projects and, if possible, tour one in person. Seeing their work firsthand gives you confidence in their capabilities.

2. Check References and Reviews
A builder’s reputation speaks volumes. Ask for references from previous clients and take the time to contact them. Were the projects completed on schedule? Was the builder communicative and transparent about costs? Online reviews can also give you insights into how the builder handles challenges. A trustworthy builder will have a track record of satisfied clients and successful projects.

3. Evaluate Communication and Transparency
Clear communication is essential in construction projects. Your ADU builder should be responsive, approachable, and able to explain technical details in plain language. During your initial meetings, notice if they listen to your ideas, answer questions thoroughly, and outline costs and timelines clearly. A builder who communicates well reduces stress and ensures your vision is understood and executed.

4. Understand Pricing and Contracts
While cost shouldn’t be the only deciding factor, it’s important to know what you’re paying for. Ask for detailed estimates that include materials, labor, permits, and any potential extra charges. Make sure the contract clearly defines the scope of work, payment schedule, and warranty. This prevents surprises down the road and protects both you and the builder.

5. Look for Flexibility and Problem-Solving Skills
Every construction project faces unexpected challenges. The best ADU builders are flexible, creative, and solution-oriented. Whether it’s adapting your design to fit a tricky lot or finding ways to stay on budget without compromising quality, a proactive builder can make all the difference.

6. Consider Local Knowledge
ADU regulations and permitting processes can vary by city or county. A builder familiar with your area will know the local rules and likely have connections that can speed up approvals. This local expertise can save you time, frustration, and money.

7. Trust Your Instincts
Finally, trust your gut. Building an ADU is a partnership between you and your builder. You want someone you feel comfortable working with, someone who respects your ideas, and someone you can rely on from start to finish.