ADU Construction Services by Tate & Son, Inc.
Tate & Son, Inc. is a family-owned and operated ADU contractor serving homeowners across San Diego and Southern California, including areas such as Torrey Highlands, Poway, 4S Ranch, and Del Mar. With over 50 accessory dwelling units built and a 5-year workmanship warranty, they bring hands-on experience to each project.
An accessory dwelling unit can serve a variety of purposes — housing extended family, providing a dedicated home office, creating guest quarters, or generating rental income. ADUs come in different forms, including detached ADU builds, garage conversions, and in-law suite additions. Whether attached to the main home or fully separate, an ADU adds livable square footage without requiring a move to a new property.
Tate & Son, Inc. handles a range of ADU-related work, including:
- Room additions
- Garage conversions and enclosures
- In-law suite additions
- Master suite remodels
- Fully-equipped kitchen builds
- Family room extensions
- Home office builds
- Custom home bar installations
- Master bathroom additions
Beyond the functional benefits, an accessory dwelling unit can increase a property's market value. Buyers tend to view the additional livable space as an asset, which can translate to a higher sale price down the line.
Timeline and Permitting
Once all permits are secured, Tate & Son, Inc. can typically complete ADU construction within 2 to 4 months. The permitting process itself generally takes between 6 to 8 months, with the bulk of that time attributed to permit approval. City inspectors assess each milestone throughout the build. Tate & Son, Inc. handles the necessary documentation and permit applications on behalf of the homeowner.
Garage conversions tend to move faster than ground-up builds. Materials are ordered as early as possible to minimize delays, though availability and material choices can affect the overall timeline.
Tate & Son, Inc. is a licensed, bonded, and insured Class A Contractor. Their license number is #1022170.
ADU Pricing Overview
The cost of building an ADU varies depending on the scope of work, the type of structure, and whether an existing structure is being converted or a new one is being built from scratch. Distance from the main home and local requirements — such as mandatory solar panel installation — can also affect pricing. Below are some general guidelines:
- Garage conversion to studio (approx. 400 sq. ft.): Around $70,000–$80,000, covering a small kitchen, bathroom, and basic plumbing and electrical work
- Casita with full kitchen, walk-in closet, and full bathroom: Quoted at approximately $345,000, with kitchen work around $65,000
- Garage conversion to studio with expansion (adding 200 sq. ft.): Quoted at approximately $200,000
- Full structure rebuild with kitchen and bathroom: Quoted at approximately $130,000, with structural work around $50,000
- ADU with up to two bedrooms, bathroom, and kitchen: Approximately $400,000 depending on size and finishes
Free estimates are provided after an on-site visit, where the scope, materials, and level of customization can be discussed in detail. Owner Shawn personally oversees projects and conducts on-site consultations, guiding homeowners through the process from initial planning to final walkthrough. Subcontractors used by Tate & Son, Inc. have been personally vetted by the owner and have worked with the company for many years. A designer is also available to assist with kitchen planning and overall vision.
Upon project completion, all work is backed by a 5-year warranty, giving homeowners confidence in the quality and durability of the finished space.
