NJ Design & Build is a San Diego ADU builder that handles every step in-house – design, City/County of San Diego permits, and construction – for detached, attached, two-story, garage-conversion and junior ADUs. We’re based at 3675 Ruffin Rd, Kearny Mesa, and build across San Diego County. Call (619) 966-7766 for a free estimate.
We specialize in high-quality ADU solutions and construction, guiding you through every step, from design and permits to construction and inspection. Our team ensures your ADU meets all regulations, suits your needs, and stays within budget. With expert craftsmanship and attention to detail, we deliver a seamless, stress-free building experience.
Licensed California contractor – CA Lic. #1089207
From design to construction, we provide end-to-end ADU solutions tailored to your needs. As an experienced ADU contractor in San Diego, our team ensures a seamless process, handling permits, inspections, and high-quality craftsmanship to deliver a functional and stylish living space.
Detached ADUs are standalone units separate from the main home, offering maximum privacy and independence. They can be built in the backyard, on the side, or elsewhere on the property, providing a flexible living space.
Attached ADUs are connected to the main home, offering convenience while maintaining a separate living space. They can be an extension of the house or built over a garage, providing flexibility for additional living or rental income.
Two-Story ADUs maximize space by building upward, offering more living area without expanding the footprint. They’re ideal for small lots, providing a functional and private space for family, guests, or rental opportunities.
We can transform your existing garage into a functional ADU, saving you the cost of building from scratch. This cost-effective solution adds valuable living space, customized to fit your needs.
Junior ADUs are compact units under 500 sq. ft., perfect for adding living space on a budget. Whether attached or detached, they’re ideal for rentals, guests, or housing aging relatives.
We offer expert ADU construction with a focus on quality, efficiency, and compliance. As a San Diego ADU contractor homeowners can count on, we ensure a smooth process from design to completion, with tailored solutions and exceptional craftsmanship to maximize your property’s potential.
Our San Diego ADU team provides expert design, construction, and project management for creating functional, stylish living spaces. From securing permits to the final finishing touches, we ensure a smooth, efficient process tailored to your needs. Whether for extra living space, rental income, or family accommodations, our team brings your vision to life with quality craftsmanship and attention to detail.
We offer custom ADU designs tailored to your needs, maximizing space, functionality, and aesthetics while staying within budget.
Our expert construction team ensures high-quality ADU builds, using durable materials and efficient techniques for lasting results.
We handle all ADU permits, ensuring compliance with local regulations, simplifying the approval process for a smooth project.
From concept to completion, we manage your ADU project with expert coordination, keeping everything on schedule and within budget.
We integrate eco-friendly materials and sustainable practices into your ADU design and construction, promoting energy efficiency and environmental responsibility.
Our interior design team crafts functional, stylish ADU interiors, optimizing space and creating a comfortable living environment.
Call us today! NJ Design & Build Construction contractors are available for all your commercial and residential construction needs. For all your trusted general contractor needs, we’re here to help.
An Accessory Dwelling Unit (ADU) is a self-contained living space located on the same property as a primary residence. It can be used for additional living space, rental income, or housing family members.
