#1 ADU Contractor in Rancho Palos Verdes
Custom Builds by Horizon Remodeling
Horizon Construction & Remodeling Inc. handles ADU projects in Rancho Palos Verdes, managing everything from initial design and budgeting through permitting with the City of Rancho Palos Verdes and final construction. The peninsula’s characteristic sloping lots, midcentury ranch homes, and split-level floor plans mean grading and foundation conditions have to be assessed early, and any property near Portuguese Bend or Seaview must be checked against the city’s current landslide moratorium rules before work begins. We coordinate every trade so the project meets applicable codes and fits your property.
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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As an adu contractor in Rancho Palos Verdes, we work under California’s ADU law, which moved into Government Code sections 66310 through 66342 in 2024 and was updated again on January 1, 2026. Under those updated rules, square footage is measured as interior livable space, and a local agency has 15 business days to decide whether your application is complete, then 60 days to approve or deny it. Approval is ministerial, meaning no public hearing and no discretionary design review stands between a complete application and a decision.
For any property in Rancho Palos Verdes, that application goes to the City of Rancho Palos Verdes, which issues building permits for work inside city limits. One site-specific factor demands attention before any plans are drawn: part of the city sits on the Portuguese Bend landslide, and land movement since 2023 has damaged homes in the Portuguese Bend and Seaview neighborhoods. The city restricts construction in affected areas, so we check every project against the current landslide moratorium rules before anything else moves forward.
The county’s own ADU ordinance, which covers unincorporated territory rather than incorporated cities, was amended in July 2025 and then found non-compliant with state law by the California Department of Housing and Community Development in December 2025. Among the findings, it caps detached ADUs on a multifamily lot at two where state law permits up to eight. That ordinance does not govern Rancho Palos Verdes, but it illustrates why a local handout is not always a reliable reading of current statute.
Rancho Palos Verdes incorporated in September 1973, and most of its housing stock reflects the peninsula’s midcentury development, with single-family ranch and split-level homes that step down sloping coastal lots. That grade shapes nearly every ADU decision: where a detached unit can sit, how far utilities need to run, and whether converting an existing garage or building a new structure is the more practical path. We walk the parcel and review setbacks, grading conditions, equipment access, and utility routes before a single line is drawn.
State law sets a floor of protections that applies regardless of which city issues your permit. A local agency cannot cap an ADU below 850 square feet of interior livable space, or below 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 as a condition of building an ADU, constructing one 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. We coordinate the full scope, from site assessment through permitting and construction, so the project meets both state requirements and whatever site-specific conditions your lot presents.
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 Rancho Palos Verdes ?
Horizon Construction and Remodeling builds ADUs in Rancho Palos Verdes as a licensed Class B general building contractor, bonded, and in business since 2009. We handle the full scope under one roof: design, permit submittals to the City of Rancho Palos Verdes, and construction from ground up to final sign-off.
On the peninsula, the site itself drives most of the early decisions. The typical home here is a midcentury ranch or split-level that follows a sloping coastal lot, so grading conditions and foundation depth have to be resolved before drawings are finalized. Parcels in Portuguese Bend and Seaview also require a careful check against the city’s current landslide moratorium rules before any project can move forward responsibly.
Specialty trade portions, including electrical, plumbing, and similar work, are performed by appropriately licensed subcontractors we coordinate directly. We serve neighborhoods across the city, including Abalone Cove and Eastview, and also build ADUs in Rolling Hills Estates, Palos Verdes Estates, and Lomita.
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ADU Contractor Services in Rancho Palos Verdes
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ADU Contractor in Rancho Palos Verdes FAQ
What is an ADU and why should I build one?
An accessory dwelling unit is a secondary home built on your existing property, taking the form of a converted garage, a backyard cottage, or an in-law suite. Building one with Horizon Construction & Remodeling can generate rental income, add room for family, or simply expand your usable living space, though lots in areas like Portuguese Bend require a careful check against the city’s current landslide moratorium before any work begins.
How much does it cost to build an ADU in California?
What an ADU costs in Rancho Palos Verdes depends on details no contractor can assess from a website alone. The size and type of unit matter, as does whether you are converting existing space or building a new detached structure. Site conditions on the peninsula add another layer of complexity: sloping coastal lots often require grading work and careful attention to foundation conditions before a shovel touches the ground. If your property falls within or near the Portuguese Bend or Seaview areas, we also have to verify your project against the city’s current landslide moratorium rules before any scope or price conversation makes sense. We walk the parcel, confirm setbacks and utility runs, and then give you a fixed scope and number you can hold us to.
State law does set limits that protect your budget in meaningful ways. ADUs of 750 square feet or less of interior livable space are exempt from impact fees, school fees apply only above 500 square feet, and connection fees for a conversion or junior ADU are restricted because the state does not classify those as a new residential use. Adding an ADU also cannot trigger a fire sprinkler retrofit of your main house. One warning worth repeating: the CalHFA ADU grant program is closed, its funding fully allocated, and anyone offering to help you obtain an ADU grant is running a scam. Permits for all work inside city limits are issued through the City of Rancho Palos Verdes, and we coordinate that process on your behalf.
Do I need permits for an ADU in Rancho Palos Verdes?
Yes, an ADU in Rancho Palos Verdes always requires a building permit, though approval is ministerial rather than discretionary, meaning there is no hearing and no design review board to satisfy. Applications go to the City of Rancho Palos Verdes, which handles all building permits for work within city limits. Under state law, the city has 15 business days to confirm the application is complete and 60 days to approve or deny it, and any denial must spell out exactly what needs to be corrected. A pre-approved plan shortens that review window to 30 days. Homeowners in areas like Portuguese Bend and Seaview also need to verify their property falls outside the city’s current landslide moratorium before submitting, given the ground movement that has affected those neighborhoods since 2023. We prepare and submit the full permit package and manage every inspection through project close, so the process does not fall 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 Rancho Palos Verdes?
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 every phase of an ADU project in Rancho Palos Verdes, from design and permitting through final construction, coordinating each trade so the work meets building codes and fits your budget. On the peninsula’s sloping lots, that coordination includes reviewing grading and foundation conditions, and for properties near Portuguese Bend or Seaview, confirming the project is clear of the city’s current landslide moratorium rules before a single permit is filed.
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?
To get started, contact Horizon Construction & Remodeling Inc. to schedule a free consultation, where we assess your property, discuss your goals, and deliver a detailed estimate covering every phase of your ADU project in Rancho Palos Verdes, including any grading or foundation conditions your lot may require.
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Horizon is a licensed Class B general building contractor serving Rancho Palos Verdes and the surrounding Orange County communities.
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