Build Your ADU in San Diego County
Full-service design-build from permits to final inspection. 30+ years of experience across North County San Diego.
Start Your ADU Project
Free consultation, no pressure.
Start Your ADU Project
Free consultation, no pressure.
Where quality construction meets your vision.
What type of ADU are you building?
Our in-house architects, designers, and builders create a seamless experience from permits to move-in day. 900+ projects completed across North County San Diego.
Our work speaks for itself.
Testimonials
What our clients say…
BNC Builders handled every aspect of our ADU project professionally. The permitting process was seamless, and the final result exceeded our expectations. We now have a beautiful space that adds real value to our property.
David K. - Encinitas
Let us build an ADU you'll be proud of.
ADU Questions? We Have Answers.
Common questions about building an ADU in San Diego County
Most ADU projects take 8-14 months from design through completion, including the permitting phase. Permitting alone can take 2-4 months depending on your city. We provide a detailed timeline during your free consultation.
ADU construction typically ranges from $150,000 to $350,000+ depending on size, type (detached vs. attached vs. garage conversion), finishes, and site conditions. We provide transparent, detailed estimates with no hidden fees.
Yes, all ADUs in California require building permits. Our team handles the entire permitting process, including architectural plans, engineering, and city submissions. We have deep experience navigating North County San Diego regulations.
Yes. California law allows homeowners to rent out ADUs. Many of our clients generate $1,500-$3,000+ per month in rental income, making ADUs an excellent investment.
We build detached ADUs, attached ADUs, garage conversions, and junior ADUs (JADUs). During your consultation, we'll assess which type is the best fit for your property, goals, and budget.
Yes. BNC Builders is a full-service design-build firm. Our in-house architects and designers create custom ADU plans optimized for your lot, ensuring maximum value and a smooth permitting process.
Still have questions?
Contact us at (760) 658-6238