RITZ ADU Design Build — San Diego's Trusted ADU Contractor
RITZ ADU Design Build has been constructing beautiful homes and accessory dwelling units in San Diego County since 1965. As an experienced ADU builder, they bring decades of expertise to every project, guiding homeowners through every step — from initial planning and design to permitting and final construction.
Accessory dwelling units are far more versatile than many homeowners realize. While they are commonly known as granny flats or mother-in-law suites, ADUs in San Diego are now being used as backyard offices, art studios, boomerang flats for returning adult children, and income-generating rental units. Garage conversions are also a popular ADU option, with homeowners transforming their garages into bedrooms, apartments, gyms, and game rooms.
As a full-service accessory dwelling unit builder, RITZ handles projects of all types, including:
- In-Law Suites — Safe, private, and affordable living spaces for aging family members
- Backyard Art Studios — A creative retreat just steps from the main home
- Boomerang Flats — Flexible spaces that serve as a private apartment, guest house, or rental unit
- Backyard Offices — Quiet, dedicated workspaces for entrepreneurs and remote professionals
- Backyard Rentals — Income-producing units that increase property value
- Garage Conversions — Converting existing garage space into functional living areas
A Thorough Planning and Design Process
The process begins with listening. RITZ takes the time to understand each homeowner's vision before conducting detailed research to confirm whether an ADU can be built in their specific neighborhood. San Diego County has varying regulations across different jurisdictions, and RITZ stays current with all state, county, and city rules to ensure a smooth path forward.
Once the property is confirmed as ADU-eligible, their team visits the site to take precise measurements of the entire property, verify utility locations, and assess critical infrastructure such as furnace and hot water capacity. These measurements are then digitized into full-color 3D renderings, plans, and elevations, giving homeowners a virtual walkthrough of their future ADU before any construction begins.
A complete project proposal is provided, including full itemization, a clearly defined payment schedule, and all terms and conditions outlined in a Project Specification Sheet. Homeowner input is encouraged throughout the design phase to ensure the final result truly reflects their needs and goals.
As a seasoned detached ADU builder and garage conversion contractor, RITZ also manages the permitting process on behalf of their clients. Their Research and Development team monitors each submission closely until the permit is issued, minimizing delays and complications.
Why an ADU Is a Smart Long-Term Investment
Building an ADU is an investment in both quality of life and property value. California's legislative changes — including Assembly Bill 68 passed in 2019 — have significantly reduced restrictions on ADU construction, making it easier than ever for homeowners to add an accessory dwelling unit to their property. ADUs can now even be built on multi-family properties such as duplexes.
The benefits of building an ADU are wide-ranging:
- Independent living for elderly family members
- Affordable housing solutions
- Rental income potential
- Multi-generational living arrangements
- Increased property value
- Expanded and flexible living space
- Privacy and improved quality of life
As life evolves, so do housing needs. A backyard cottage builder like RITZ understands that an ADU built today can serve many different purposes over time — from housing a college graduate returning home, to providing a private retreat, to generating rental income during retirement. The versatility of an accessory dwelling unit makes it one of the most practical and valuable additions a San Diego homeowner can make to their property.
With a trusted team of field professionals who have worked alongside one another for years, RITZ brings professionalism, craftsmanship, and a collaborative spirit to every build. Their office staff remains available throughout the construction phase to address decisions as they arise, ensuring the project stays on track from groundbreaking to completion.
