#1 ADU Contractor in South Laguna
Custom Builds by Horizon Remodeling
Horizon Construction & Remodeling Inc. builds accessory dwelling units and home additions for South Laguna homeowners, handling design coordination, budgeting, material selection, and permits from start to finish. Because South Laguna is part of Laguna Beach, permit applications go through the City of Laguna Beach Building Division, and most projects here also fall under the Local Coastal Program, which adds a layer of review that we account for early in planning. The mid-century cottages and hillside lots common throughout areas like South Laguna Village and Coast Royal present real site challenges, and our team coordinates every trade needed to work through them.
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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Working as your adu contractor in South Laguna means understanding how California ADU law, local coastal oversight, and the realities of mid-century hillside lots all intersect on a single parcel. State law governing ADUs lives in Government Code sections 66310 through 66342, and revisions effective January 1, 2026 clarified that square footage is measured as interior livable space. Agencies now have 15 business days to determine whether an application is complete and 60 days to approve or deny it, with approval being ministerial, meaning no hearing and no discretionary design review.
Because South Laguna was annexed into Laguna Beach in 1987, your permit application goes to the City of Laguna Beach Building Division rather than any separate South Laguna jurisdiction. That office also administers Laguna Beach’s Local Coastal Program, certified in 1993, and the South Laguna Community Design and Landscape Guidelines adopted in 2022 now form part of that certified program. Both documents carry real weight for any new structure in the coastal zone, so we account for them before a single line is drawn.
The land itself introduces the next layer of complexity. Most homes in areas like South Laguna Village, Three Arch Bay, Coast Royal, and Camel Point were built through the middle of the twentieth century on steep coastal or hillside lots. A modest mid-century cottage that has already been added onto more than once leaves limited room to work with, and the grade directly affects setbacks, utility routing, equipment access, and whether a detached build or a garage conversion makes more practical sense. We walk the parcel and assess all of that before recommending an approach.
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 sprinkler retrofit of the main house, and there are no impact fees on a unit of 750 square feet or less. We coordinate every trade involved through our general contracting process so those protections translate into a finished, permitted unit.
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 South Laguna ?
Horizon Construction and Remodeling is a licensed and bonded Class B general building contractor that has been doing design-build work since 2009. South Laguna is a comfortable drive from our Fullerton office, so projects in areas like South Laguna Village, Three Arch Bay, Coast Royal, and Camel Point are well within our regular working range. A detached ADU is a complete small house placed on a lot that already has a primary residence, covering foundation, framing, roof, envelope, a kitchen, a bathroom, and all the utility connections those systems require.
Design-build matters on a project like this because the people making the design decisions and the people managing the construction constraints are the same team. Permits for South Laguna go through the City of Laguna Beach Building Division, a direct result of the 1987 annexation, and the property also falls inside the coastal zone governed by Laguna Beach’s certified Local Coastal Program.
The mid-century cottages that characterize South Laguna often sit on steep hillside lots that have already been added onto more than once, so site conditions shape the design from the start. We draw the plans, manage the permit process, and build the ADU under one contract. We also serve nearby communities including Laguna Niguel, Dana Point, and Aliso Viejo.
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ADU Contractor Services in South Laguna
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ADU Contractor in South Laguna FAQ
What is an ADU and why should I build one?
An ADU is a secondary housing unit on your property, such as a backyard cottage, garage conversion, or in-law suite. Building one with Horizon Construction & Remodeling can open up rental income, added living space, or a private setup for family members. On the hillside and coastal lots common across South Laguna, that kind of square footage matters.
How much does it cost to build an ADU in California?
What an ADU costs in South Laguna depends on details we cannot determine from a web page. The unit type matters, whether you are converting an existing space within one of the area’s mid-century cottages or building a new detached structure on a steep coastal lot. Site work varies considerably on hillside parcels, and utility runs, finish level, and square footage all move the number. What we can tell you is where the money goes and what state law limits. A unit at or under 750 square feet of livable space is exempt from impact fees. School fees apply only above 500 square feet. Connection fees for a junior ADU or a conversion are capped, 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 South Laguna is now part of Laguna Beach, permits run through the City of Laguna Beach Building Division, and coastal zone rules under the Local Coastal Program add a layer of review beyond a standard building permit. Anyone quoting a firm price before walking your specific parcel is guessing. We visit the property, confirm setbacks and utility connections, and then give you a fixed scope and price. One thing worth stating plainly: the CalHFA ADU grant program is closed, its funding fully allocated, and the agency itself warns that anyone offering to help you obtain one is running a scam.
Do I need permits for an ADU in South Laguna?
ADU projects in South Laguna always require a building permit, though approval is ministerial rather than discretionary, meaning there is no hearing and no design review board to satisfy. Because South Laguna was annexed into Laguna Beach in 1987, applications go through the City of Laguna Beach Building Division, which serves the older mid-century neighborhoods along the coast from South Laguna Village to Camel Point. State law gives the agency 15 business days to confirm completeness and 60 days to approve or deny, a window that can shorten to 30 days when a pre-approved plan is used. We prepare and submit the full package and follow the project through every inspection, so that responsibility stays with us rather than landing back on you.
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 South Laguna?
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 South Laguna from initial design through final inspection, coordinating permitting with the City of Laguna Beach Building Division and keeping the work aligned with building codes, your budget, and your schedule.
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 book 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 the ADU build, including the permit process through the City of Laguna Beach Building Division.
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 South Laguna and the surrounding Orange County communities.
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