A completed two-bedroom Ritz ADU built within the original garage footprint in San Diego
Licensed & Insured · CA Lic. B-239311

Reinvent Your Backyard With San Diego's Premiere ADU Builder

Ritz ADU Design Build creates custom accessory dwelling units, garage conversions, granny flats and backyard offices across San Diego County — and we've been building here since 1965.

  • Free 3D Design & Walkthrough
  • Family Owned, Fully Licensed & Insured
  • 5-Star Rated on Google, Yelp & Houzz

Request Your Free 3D Design Consultation

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Our Services

What We Build

A completed detached accessory dwelling unit lit at dusk The bedroom inside a finished accessory dwelling unit A 3D design rendering of a detached backyard home

ADU & Backyard Homes

Detached accessory dwelling units built for rental income, family or resale value. We handle design, permits and construction from conception to occupancy.

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A garage converted into a light-filled home gym with folding glass doors A 3D design rendering of a garage conversion with living space above

Garage Conversions

Turn an unused, glorified storage unit into a livable room or a backyard rental. Attached, detached or integral garages — we convert all three.

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A 3D design rendering of a single-story granny flat with a step-free entry The bedroom inside a finished single-story granny flat

Granny Flats

Keep aging parents close and independent. Single-story, step-free layouts designed around how your family actually lives — from studio to two bedroom.

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A detached backyard office with folding glass doors opening onto a lawn The interior of a backyard art studio with vaulted ceilings and full-height windows

Backyard Offices & Studios

A real workspace forty steps from your back door — plus home theaters, gyms and gaming rooms. Quiet, insulated and fully permitted.

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A full-color 3D rendering of a planned backyard home A full-color 3D rendering of a planned garage conversion Approved building permit paperwork on top of rolled construction plans

3D Design & Permitting

We measure your home and digitize it into full-color 3D renderings you can walk through virtually — then pull every plan and permit ourselves.

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What Our Clients Say

Client Testimonials

Google Review
“The professionals at Ritz have, in our mind, re-defined the standard of excellence.”
— Mark Peifer
Yelp Review
“Their team performed like a fine tuned machine from conception to completion.”
— K S. · San Diego, CA
Google Review
“We are 100% pleased with our new living space! When we are ready for additional home improvement we will be calling Ritz Design Build.”
— Bernie Clark
Houzz Review
“Ritz came in with the best price and a flexibility that made our project possible.”
— Danielle Yockman · San Diego, CA

Let's Talk About Your Project

Your Backyard Project Starts Here

Call us directly — a Ritz designer is ready to walk your property, check what's buildable in your neighborhood and put your idea in 3D.

(858) 248-9711

Free 3D design · Fully Licensed & Insured · CA Lic. B-239311