#1 ADU Contractor in Newport Beach
Custom Builds by Horizon Remodeling
Horizon Construction & Remodeling Inc. handles ADU projects in Newport Beach from initial design through final inspection, coordinating budgeting, material selection, permitting, and every trade involved in the build. Because much of Newport Beach falls within the California coastal zone, projects in those areas go through the City’s own certified Local Coastal Program, meaning coastal development permits are issued locally rather than by the Coastal Commission. We manage that process on your behalf and make sure the finished unit meets current city requirements.
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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 Newport Beach means understanding that state law and local coastal rules shape the project before a single line gets drawn. California ADU law, codified in Government Code sections 66310 through 66342, was updated January 1, 2026, so square footage is now measured as interior livable space rather than gross area. Once an application is submitted to the City of Newport Beach Community Development Department, the city has 15 business days to confirm the application is complete and 60 days to approve or deny it, with no hearing and no discretionary design review required.
Newport Beach adds a layer that most Southern California cities do not carry. Much of the city falls within the California coastal zone, and Newport Beach has administered its own certified Local Coastal Program since January 30, 2017, which means coastal development permits are issued directly through the city rather than routed to the Coastal Commission. That in-house process matters for properties on Balboa Island, the Balboa Peninsula, and other coastal tracts, and we account for it from the first conversation.
The parcel itself sets the parameters that follow. Newport Beach grew in distinct phases after its 1906 incorporation, with peninsula and island lots platted first and hillside and inland parcels added across the twentieth century and into the 2000s. A compact beach cottage on a small lot in Corona del Mar presents a completely different set of constraints than a larger custom home in Newport Heights, and those differences decide whether a garage conversion or a new detached structure is the practical path forward.
State law establishes a floor of protections regardless of which block a property sits on. A local agency cannot hold 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 sprinkler retrofit of the main house, and there are no impact fees on units of 750 square feet or less. We walk every parcel before drawing anything, checking setbacks, grade, utility routes, and equipment access so the design reflects what the lot will actually support.
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 Newport Beach ?
Horizon Construction and Remodeling is a licensed Class B general building contractor, bonded, with over fifteen years of design-build experience. Newport Beach is a short drive from our Fullerton office, so we treat projects here the same as local work. Because much of the city falls within the California coastal zone, ADU permits in many Newport Beach locations go through the City’s own certified Local Coastal Program rather than directly to the Coastal Commission, and we prepare those coastal development permit submittals alongside the standard building permit application from the start.
A detached ADU is essentially a small house built on a lot that already has a primary residence. It requires foundation work, framing, a roof, a complete building envelope, a kitchen, a bathroom, and separate utility connections, with specialty trade portions coordinated through appropriately licensed subcontractors.
Newport Beach housing varies considerably block by block, from compact older beach cottages on Balboa Island and the Balboa Peninsula to larger custom homes in Corona del Mar and Newport Heights, and that starting point shapes every ADU design differently. One team handling design, permitting, and construction keeps those decisions connected throughout.
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ADU Contractor Services in Newport Beach
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ADU Contractor in Newport Beach FAQ
What is an ADU and why should I build one?
An accessory dwelling unit is a self-contained secondary home on your existing property, built as a backyard cottage, a converted garage, or an attached in-law suite. Working with Horizon Construction and Remodeling on an ADU in Newport Beach gives you a way to add rental income, house extended family, or gain extra living space on a lot you already own.
How much does it cost to build an ADU in California?
What an ADU costs in Newport Beach depends on details no contractor can assess from a distance: whether you are converting an existing structure or building detached new construction, how much site work and utility routing your lot requires, and the finish level you select. On a compact Balboa Island parcel or a small-lot beach cottage on the Peninsula, the starting conditions look nothing like a larger rebuilt custom home in Corona del Mar or Newport Heights, so the numbers shift accordingly. Anyone quoting a firm figure before walking your property is guessing. We inspect the site, confirm setbacks and utility connections, and then give you a fixed scope and price you can hold us to.
State law does offer some cost protections worth knowing. ADUs at or under 750 square feet of livable space are exempt from impact fees, school fees apply only above 500 square feet, and connection fees for conversions or junior ADUs are limited because the state does not classify those as a new residential use. Adding an ADU also cannot trigger a fire sprinkler retrofit on your main house. Because Newport Beach has administered its own certified Local Coastal Program since January 30, 2017, coastal development permits are handled directly through the City of Newport Beach Community Development Department rather than routed to the Coastal Commission. One caution 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 an ADU grant is running a scam.
Do I need permits for an ADU in Newport Beach?
Yes, an ADU always requires a building permit, though approval is ministerial rather than discretionary, meaning no hearing or design review board weighs in. Applications in Newport Beach go to the City of Newport Beach Community Development Department, which has 15 business days to confirm completeness and 60 days to issue a decision, a window that drops to 30 days when a pre-approved plan is used. Because much of the city falls within the California coastal zone and Newport Beach administers its own certified Local Coastal Program, coastal development permits are handled locally rather than through the Coastal Commission. We prepare and submit the full permit package and see it through every inspection, so the process does not land back on your plate.
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 Newport Beach?
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. manages ADU projects in Newport Beach from initial design through final inspection, coordinating permitting with the City of Newport Beach Community Development Department, which also issues coastal development permits in house under the city’s certified Local Coastal Program, so your project stays on track whether your lot sits on the peninsula or further inland.
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 consultation, where we assess your property, talk through your goals, offer design recommendations, and put together a detailed estimate, then guide you through every phase of your ADU project from there.
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 Newport Beach and the surrounding Orange County communities.
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