#1 ADU Contractor in Coto De Caza
Custom Builds by Horizon Remodeling
Horizon Construction & Remodeling Inc. handles ADU projects in Coto de Caza from initial design through final inspection, covering everything from detached backyard units to attached additions without handing the planning burden back to you. Because Coto de Caza is unincorporated county territory, permits run through OC Development Services, and the CZ Master Association requires architectural approval and coordinates gate access for crews before work begins. We manage both processes alongside budgeting and material selection so your project moves forward without unnecessary delays. Call us today to request a free estimate.
Services We Offer
How Our ADU Process Works
When it comes to enhancing your living space, room additions combined with Accessory Dwelling Unit (ADU) construction offer unparalleled versatility and value. These projects not only increase square footage but also provide additional living accommodations, whether for extended family, rental income, or work-from-home setups, making them a popular choice for homeowners seeking to maximize their property’s potential. According to California’s Department of Housing and Community Development, ADUs are a key solution to expanding housing options in urban and suburban neighborhoods.
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Finding the right adu contractor in Coto De Caza means understanding a permit process that runs through OC Development Services rather than a city hall, because Coto de Caza sits in unincorporated Orange County territory. California ADU law, codified in Government Code sections 66310 through 66342 and updated January 1, 2026, governs how that application is reviewed. The agency has 15 business days to determine whether the application is complete and 60 days to approve or deny it, and approval is ministerial, meaning no hearing and no discretionary design review are required.
The community itself adds a layer that purely statutory summaries leave out. Every property here falls under the CZ Master Association, which means association architectural approval and gate access coordination for crews run alongside the county permit. Both tracks need to move together, and we account for that from the start rather than treating the HOA process as an afterthought once county review is underway.
The lot and the existing house shape the rest of the planning. Coto de Caza was built out between 1986 and 2003 as a master-planned community, and the typical home is a two-story tract or semi-custom residence with an open kitchen-to-family-room layout and a center island. That floor plan influences where a detached unit can sit, how far utility connections have to run, and whether a garage conversion or a new detached structure is the more practical path. We walk the parcel and check setbacks, grade, equipment access, and utility routes before any drawings are produced.
State law sets a floor of protections regardless of where the parcel sits. A local agency cannot cap an ADU below 850 square feet of interior livable space, or 1,000 square feet for a unit with more than one bedroom, and square footage is now measured as interior livable space under the 2026 update. Side and rear setbacks cannot exceed four feet, owner-occupancy cannot be required, building an ADU cannot trigger a fire sprinkler retrofit of the main house, and there are no impact fees on a unit of 750 square feet or less.
Other Remodeling Services We Offer
A modern kitchen adds functionality, comfort, and lasting value to your home. At Horizon Construction & Remodeling, our kitchen remodeling experts bring fresh ideas and professional project management tailored to your unique needs. From layout design to material selection, we prioritize delivering a high-standard kitchen that’s both beautiful and energy-efficient — enhancing the way you cook, gather, and live every day.
Whether you envision a classic Southern California pool or a fully customized backyard oasis, Horizon Construction & Remodeling delivers the highest level of quality and service. Our comprehensive pool design and remodeling services cover everything from layout and decking to built-in BBQs and final touches like landscaping. Let Horizon be your trusted partner in transforming your backyard into the perfect outdoor retreat.
If you are planning a complete bathroom remodel or simply want to change your tub, shower, update your plumbing fixtures, or make the space more efficient, our team at Horizon will help you through the process with expert advice, professional craftsmanship, and affordable options with beautiful results. Learn more about our bathroom remodeling services.
Transform your space with our expert interior work services. We offer a comprehensive range of solutions — from space planning and custom design to the selection of high-quality finishes and materials. Our team of experienced professionals works closely with you to create a space that’s both functional and stylish, tailored to your unique needs, goals, and budget. Whether you’re updating a single room or overhauling your entire interior, we bring precision, creativity, and craftsmanship to every project.
At Horizon, we believe your home is more than just four walls — it’s where life happens. It’s the place you relax, gather with family and friends, and create lasting memories. That’s why we offer a full range of exterior work services designed to elevate your outdoor living space. From patios and hardscaping to custom decks and exterior renovations, we help turn your vision into a dream yard that complements your lifestyle and enhances curb appeal.
At Horizon Construction & Remodeling, our expert team includes a dedicated design and planning division that works hand-in-hand with licensed architects and structural engineers. We take care of everything — from detailed plans and blueprints to securing city permits — so you don’t have to deal with delays or red tape. Our goal is to streamline the process and provide a fully approved set of documents that aligns with both your vision and city regulations, saving you time and stress.
Why Choose Horizon Remodeling As Your ADU Contractor in Coto De Caza ?
Horizon Construction and Remodeling is a licensed Class B general building contractor, bonded, and based in Fullerton, making Coto de Caza a straightforward drive from our office. We have been doing design-build work since 2009, and a detached ADU is among the more involved projects we take on: foundation, framing, roofing, envelope, plus plumbing and electrical portions handled by appropriately licensed subcontractors we coordinate, along with a full kitchen and bathroom.
Because Coto de Caza is unincorporated county territory, permits run through OC Development Services rather than a city building department. At the same time, the CZ Master Association requires its own architectural approval, and crews need gate access arranged ahead of each visit. We prepare the association submittal alongside the county permit application so neither process is waiting on the other.
The master-planned neighborhoods here, including Los Ranchos Estates, The Village, Grand Coto Estates, and Los Verdes, were built out between the late 1980s and 2003, and most lots accommodate an ADU alongside the existing two-story home. Design-build matters on these projects because the design decisions and the construction constraints are resolved by the same team from the start.
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ADU Contractor Services in Coto De Caza
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ADU Contractor in Coto De Caza FAQ
What is an ADU and why should I build one?
An accessory dwelling unit is a secondary home on your property, built as a detached backyard cottage, a garage conversion, or an in-law suite attached to the main house. In Coto de Caza, where the community sits in unincorporated county territory, permits run through OC Development Services and association architectural approval from the CZ Master Association must be secured before crews can even enter through the guard gate. Building an ADU with Horizon Construction and Remodeling lets you add rental income, expand your living space, or give family members a place of their own.
How much does it cost to build an ADU in California?
Pricing an ADU in Coto de Caza honestly means acknowledging what we cannot determine from a web page alone. The final number depends on whether you are converting an existing space within one of the community’s late-1980s to early-2000s tract or semi-custom homes, building a new detached structure, how far utility lines must run across your lot, and the finish level you select. What state law does make predictable is where certain costs are capped. A unit at or under 750 square feet of livable space is exempt from impact fees. School fees only apply above 500 square feet. Connection fees for a conversion or junior ADU are limited because the state does not classify those as a new residential use. Adding an ADU also cannot force a fire sprinkler retrofit on your existing home.
Because Coto de Caza is unincorporated county territory, permits run through OC Development Services rather than a city building department, and that process runs alongside CZ Master Association architectural approval and coordinating gate access for our crews. Any contractor quoting a firm price before walking your parcel and confirming setbacks and utility conditions is guessing. We visit the property first, then deliver a fixed scope and price you can hold us to. One point worth stating plainly: the CalHFA ADU grant program is closed and fully allocated, and the agency itself warns that anyone offering to help you obtain that grant is running a scam.
Do I need permits for an ADU in Coto De Caza?
Yes, an ADU in Coto De Caza always requires a building permit, though approval is ministerial rather than discretionary, meaning no hearing or design review board weighs in. Because Coto De Caza sits on unincorporated county land, the application goes to OC Development Services rather than a city building department. State law gives the agency 15 business days to confirm completeness and 60 days to approve or deny, and a pre-approved plan shortens that review to 30 days. We prepare and submit the full package and carry it through every inspection, so the process does not fall back on you. Keep in mind that the CZ Master Association also requires architectural approval and arranges gate access for crews, so that association review runs alongside the county permit process.
How long does ADU construction take with Horizon Remodeling?
Most ADU construction projects take between 4 to 8 months from design to completion, depending on scope and permit approvals. Horizon Remodeling prioritizes efficient timelines while maintaining quality workmanship.
What types of ADUs can Horizon Remodeling build?
We specialize in building detached ADUs, attached ADUs, garage conversions, backyard cottages, and junior ADUs (JADUs). Our team can help you choose the right ADU style for your property and goals.
Can I build a detached ADU on my property in Coto De Caza?
Yes, if your property meets California zoning and space requirements. Horizon Remodeling will assess your site, secure the necessary permits, and build a fully detached ADU tailored to your preferences.
Is Horizon Remodeling licensed to build ADUs in my area?
Yes, Horizon Remodeling is fully licensed, bonded, and insured to build ADUs throughout Orange County and surrounding areas. We have over 18 years of experience delivering high-quality ADU projects.
What are the benefits of hiring Horizon Remodeling for my ADU project?
Horizon Construction & Remodeling Inc. handles ADU design, permitting through OC Development Services, and construction from start to finish, including the CZ Master Association architectural approvals required in this guard-gated community, so your project stays on budget and meets California building codes.
Does Horizon Remodeling handle ADU design and permitting?
Absolutely! Horizon Remodeling provides complete ADU design services, including architectural plans and 3D renderings. We also handle city permits and inspections, streamlining your project and reducing stress.
How do I get started on an ADU with Horizon Remodeling?
Reach out to Horizon Construction & Remodeling Inc. to schedule a free estimate. We review your property, talk through your goals, and deliver a detailed scope covering every phase of your ADU build, including HOA architectural approval and county permitting through OC Development Services.
Recent ADU and Garage Conversions
Three completed ADU and garage conversion projects from our Orange County portfolio. Every project below was built in San Clemente. Nothing loads from YouTube until you press play.
ADU project in San Clemente
ADU project in San Clemente
ADU project in San Clemente
Built by Horizon Construction & Remodeling, Inc. Licensed Class B general building contractor.
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Horizon is a licensed Class B general building contractor serving Coto De Caza and the surrounding Orange County communities.
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