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A beautiful 3D architectural rendering of a modern ADU in a sunny San Diego backyard, show

Home Additions and ADU Construction

San Diego, CA

Licensed & Insured General Contractor

ADU's, Granny Flats, Home Additions, Room Additions, Kitchen Extensions, 3D Design, and More!

Family Business 60+ years

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Contact Ritz Design Build

Welcome to Ritz Design Build

Our goal is to help homeowners in San Diego increase their property satisfaction by designing beautiful ADUs.

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A modern-style accessory dwelling unit with large windows, nestled in a lush backyard, sho

ADU

Detached backyard units, attached units, and conversions. These are complete homes that can be rented.

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Home and room additions

Primary suites, family rooms, and extra bedrooms that blend with your existing home.

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3D Design Rendering

Walk through your project virtually before construction starts, so you can adjust the plan early.

A cozy interior shot of a completed ADU living area, bathed in natural light, showing warm

Guest quarters aka Granny Flats

A smaller space for visiting family and guests. It has no full kitchen and can’t be rented.

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Second-story additions

We add living space above your existing home for new bedrooms, a primary suite, or a family room without losing yard space.

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Garage conversions

We convert attached, detached, and integral garages into a backyard rental, a granny flat, a home office, or a gym, theater, or game room.

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Kitchen extensions and remodels

We expand or fully remodel your kitchen as part of an addition or on its own.

Step 1 
Get Expert Guidance

Our designer measures your home and creates full-color 3D renderings, plans, and elevations. You can take a virtual walk-through of the design before we lift a hammer.

Step 2
Win the Permit

ADU permitting varies by jurisdiction. Ritz has been building in San Diego County since 1965 and knows the rules. We research your property before design, stay current on State, County, and city regulations, then submit your permit package and follow it until the permit is issued.

Step 3
Build the ADU

During construction, our field team takes over. They’ve worked together for years, and you’ll see it in their professionalism and skill. You can feel confident your home is in experienced hands.

Some decisions will still come up during the build, and the Ritz office staff is available to help.

RITZ | Building Projects

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THE PEIFERS

built a garage conversion

1 BD / 1 BA

 See Floor Plan

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THE GILLS

built a 1 Bedroom ADU

1 BD / 1 BA

 See Floor Plan

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THE TAYLORS

2 BD / 2 BA

Built In Garage Footprint

Home Deck

Contact Ritz Design Build

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