#1 ADU Contractor in San Juan Capistrano
Custom Builds by Horizon Remodeling
Horizon Construction & Remodeling Inc. handles ADU projects in San Juan Capistrano, managing everything from early design and budgeting through permit coordination with the City of San Juan Capistrano Development Services Department and final construction. Most of the city’s housing stock consists of detached tract and hillside homes built after incorporation in 1961, and those properties are generally well suited to adding a backyard cottage, detached unit, or secondary dwelling. For older properties near the mission core, historic review may also apply, and we coordinate accordingly so your project moves forward without surprises.
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 San Juan Capistrano means understanding both state law and the local permit process before a single drawing is made. California Government Code sections 66310 through 66342 govern ADUs statewide, and a significant update took effect January 1, 2026: square footage is now measured as interior livable space, and the reviewing agency has 15 business days to confirm an application is complete, then 60 days to approve or deny it. Approval is ministerial, meaning no public hearing and no discretionary design review applies.
In San Juan Capistrano, that application goes to the Development Services Department. One detail that sets this city apart from many others is the Cultural Heritage Commission, which maintains lists of designated and potential landmark properties. The Los Rios Historic District, listed on the National Register of Historic Places in 1983 and recognized as the oldest residential neighborhood in California, sits directly beside downtown, so older parcels near that area may carry historic review obligations worth confirming early.
The character of the housing stock shapes every project. Most of the city’s residential neighborhoods were built after incorporation on April 19, 1961, producing a mix of detached tract homes and hillside properties, many finished in Spanish and Mission revival styles. That variety affects setback distances, grade challenges, utility run lengths, and whether a garage conversion or a new detached structure fits the parcel better. We walk every lot and check those conditions before drawing anything.
State law sets a firm 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. Side and rear setbacks cannot exceed four feet, owner-occupancy cannot be required, building an ADU cannot trigger a fire sprinkler retrofit of the primary home, and there are no impact fees on units 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 San Juan Capistrano ?
Horizon Construction and Remodeling is a licensed Class B general building contractor, bonded, and in business since 2009. Our Fullerton office puts San Juan Capistrano well within our regular working area, not on the edge of it. A detached ADU is a full small residence placed on a lot that already holds a primary home, covering foundation, framing, roof, electrical service, plumbing, a kitchen, and a bathroom.
Because San Juan Capistrano permits go through the City’s Development Services Department, and because older properties near the mission core or within the Los Rios Historic District may also require review by the Cultural Heritage Commission, getting the design right before submitting matters considerably. We draw, permit, and build under one contract, so the construction constraints inform the design from the first sheet rather than surfacing after plans are already filed.
Where a homeowners association is involved, we prepare that submittal alongside the building permit package rather than treating it as a separate step. We also complete ADU projects in nearby communities including Laguna Niguel, Dana Point, and Ladera Ranch.
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ADU Contractor Services in San Juan Capistrano
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ADU Contractor in San Juan Capistrano FAQ
What is an ADU and why should I build one?
A secondary unit added to your property, whether a converted garage, backyard cottage, or in-law suite, is called an accessory dwelling unit, and building one with Horizon Construction and Remodeling can open up rental income, multigenerational living space, or simply more room on your lot. In San Juan Capistrano, where the housing stock ranges from tract and hillside homes in areas like San Juan Hills and Marbella to older properties near the Los Rios Historic District, the right ADU approach depends on what you already have.
How much does it cost to build an ADU in California?
What an ADU Actually Costs in San Juan Capistrano
No honest contractor can quote you a firm number without first walking your property. The final cost depends on whether you are converting an existing structure or building a new detached unit, how much site work your lot requires, how far utility runs need to travel, and the finish level you choose. What we can tell you is where the money goes and what state law limits. Units at or under 750 square feet of livable space are exempt from impact fees. School fees only apply once a unit exceeds 500 square feet. Connection fees for conversions and junior ADUs are capped because state law does not treat those as a new residential use, and adding an ADU cannot force a fire sprinkler retrofit on your existing home.
San Juan Capistrano permits run through the City’s Development Services Department, and properties near the Los Rios Historic District or on the Cultural Heritage Commission’s landmark lists may face an additional review layer before a permit moves forward. That is exactly why we visit the parcel first, confirm setbacks and utility conditions, and then give you a fixed scope and price you can hold us to. One thing worth saying plainly: the CalHFA ADU grant program is closed, its funding fully allocated, and the agency itself warns that anyone promising to help you obtain that grant is running a scam.
Do I need permits for an ADU in San Juan Capistrano?
Every ADU in San Juan Capistrano requires a building permit, though approval is ministerial rather than discretionary, meaning no hearing or design review board weighs in. Applications go to the City of San Juan Capistrano Development Services Department, which has 15 business days to determine completeness and 60 days to approve or deny a standard submission; a pre-approved plan brings that window down to 30 days. Homeowners near older properties, particularly around the Los Rios Historic District, should be aware that historic review can apply in certain cases. Horizon prepares and submits the full permit package and carries the project through every inspection.
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 San Juan Capistrano?
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 projects in San Juan Capistrano from initial design through final inspection, coordinating permitting with the City of San Juan Capistrano Development Services Department and managing every trade so the finished unit meets code and stays within your budget.
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?
Ready to move forward? Reach out to us to set up a free consultation, where we assess your property, talk through your goals, and put together a detailed estimate with design recommendations. For properties near San Juan Capistrano’s historic core, that early conversation also helps us flag whether additional review may apply before we guide you through every phase of your ADU project.
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 San Juan Capistrano and the surrounding Orange County communities.
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