Coto de Caza is one of Orange County’s premier gated communities — large custom homes,
equestrian trails, and generous lots that lend themselves to guest houses, casitas, and ADUs. Katz
Design & Builders is a licensed design-build firm (California CSLB #1089060) that designs and builds
ADUs, casitas, and additions across Coto de Caza, matched to the scale and quality of its estates.
Why Coto de Caza homeowners choose Katz Design & Builders
- Custom-quality work. We build ADUs, casitas, and additions to a standard that
fits Coto’s estate homes. - We make the most of large lots. Room for a detached guest house, an office, or a
full ADU, designed to feel like part of the property. - Licensed, insured, accountable. CSLB #1089060, fully insured, fixed price, one
project manager. - We handle permits and HOA review. Coto’s community and city requirements are
involved. We prepare plans and manage approvals.
Our Coto de Caza ADU & addition services
Detached ADUs & casitas
Guest houses and ADUs designed to the community’s standards and the estate’s character.
Room additions & second stories
Primary suites, larger living space, or full second stories, engineered and matched to the home.
Garage conversions
Convert space into a suite, office, or gym, done to a high standard.
Whole-estate coordination
For larger projects, we coordinate additions and remodeling as one build.
What to expect: our process
- Consultation & site visit — we assess your property and goals and talk
budget honestly. - Design & fixed proposal — drawings, selections, itemized price and
schedule before construction. - Permits & approvals — handled, with HOA coordination.
- Build — one project manager, a clean site, updates to completion.
Coto de Caza ADU & additions — FAQ
Are Coto’s large lots good for a guest house or ADU?
Yes — the generous lots make Coto especially well-suited to detached casitas and ADUs. We’ll
assess what your property and the community’s rules support.
Do I need permits and HOA approval?
Yes. Projects require permits and must meet code, and Coto’s community review applies. We handle both.
How long does an ADU or addition take?
Depending on scope, most run several months. You’ll get a realistic schedule up front.
Planning your project? See our ADU cost guide for Los Angeles & Orange County.
As your general contractor in Coto de Caza, Katz Design & Builders manages your entire project — design, permits, and construction — under one roof.
Nearby areas we serve
Katz Design & Builders also serves nearby communities including Newport Beach, Lake Forest, Laguna Woods, Laguna Niguel. Explore our ADU services or see all the areas we serve.
Get a quote for your Coto de Caza project
Tell us what you’re planning and we’ll set up a consultation. Licensed CSLB #1089060, serving Coto de
Caza and Orange County.
Call (213) 444-7636 or request a consultation online.