#1 ADU Contractor in Perris
Custom Builds by Horizon Remodeling
Horizon Construction & Remodeling Inc. builds accessory dwelling units and home additions throughout Perris, coordinating design, permitting, and construction under one general contractor so you are not managing separate specialists on your own. Perris grew quickly between 1990 and 2010, and the slab-foundation tract houses that define neighborhoods like May Ranch and Villages of Avalon often have the lot area and layout that work well for a detached backyard unit. Properties closer to Downtown Perris may fall under the Downtown Perris Specific Plan, which adds its own development standards, so permit applications go through the City of Perris Building and Safety Division with that layer of review factored in from the start.
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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If you are planning to add a rental unit or housing for family, working with an experienced adu contractor in Perris means understanding how state law and local rules interact before a single permit is filed. California moved its ADU statute into Government Code sections 66310 through 66342 in 2024, and an update effective January 1, 2026 changed how square footage is counted, measuring interior livable space rather than overall footprint. Under that same framework, the reviewing agency has 15 business days to confirm an application is complete and 60 days to approve or deny it, with approval handled ministerially, meaning no public hearing and no discretionary design review.
In Perris, that application goes to the City of Perris Building and Safety Division, which sits within the Development Services Department. If your property is near the historic downtown core, the Downtown Perris Specific Plan applies alongside the citywide zoning code, adding another layer of development standards that can affect setbacks, height, and unit placement. That detail matters more than many homeowners expect, and we review it early in every project.
Riverside County maintains its own ADU ordinance, Ordinance 348, adopted in 2023. In May 2025, the California Department of Housing and Community Development identified eighteen provisions that do not comply with state law, including a one-story or 16-foot height cap, a junior ADU limit set at 50 percent of the primary dwelling, and a parking requirement for interior ADUs. State law preempts all of them, so a homeowner relying on the county handout alone may believe they can build far less than the law actually permits.
Riverside County also runs a Permit Ready ADU program offering four pre-approved plans at no cost, ranging from a 499-square-foot studio to a 909-square-foot two-bedroom. Three of those plans fall under 750 square feet and therefore below the state threshold for impact fees. The program excludes parcels in flood hazard or environmental constraint areas, so confirming which map a lot sits on is one of the first questions we ask.
The housing stock here shapes what is physically realistic on any given site. Most homes in Perris are stucco tract houses built on slabs during the growth years of the 1990s and 2000s, with open kitchen-to-family-room layouts. Older cottages and bungalows near downtown tend to sit on smaller lots with shorter utility runs in some cases and tighter setbacks in others. The lot itself, its age, its location relative to the Specific Plan boundary, and what the maps show, determines most of what we can build and where.
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 Perris ?
ADU Contractor in Perris
Horizon Construction and Remodeling is a licensed Class B general building contractor, bonded, and has been doing design-build work since 2009. We handle the full scope in-house: drawing the plans, submitting them to the City of Perris Building and Safety Division, and building the finished unit. Having one team carry the project from permit application through final inspection keeps the process moving and cuts down on the coordination gaps that slow most ADU jobs.
Perris grew fast between 1990 and 2010, and most of that housing is stucco tract construction on slab foundations with open floor plans. Those layouts often suit a detached ADU well, though properties near the downtown core can fall under the Downtown Perris Specific Plan, which adds its own development standards on top of citywide zoning. We design to current state law and plan around site-specific constraints, including summer heat loads and any flood hazard designations that affect what pre-approved plan options remain available.
State law gives you real protections on any ADU project: no owner-occupancy requirement, no sprinkler retrofit triggered on the main house, and no impact fees on a unit with 750 square feet or less of interior livable space. We work in neighborhoods across Perris, including Downtown Perris, May Ranch, Villages of Avalon, and Green Valley. Contact us to request a free estimate for your ADU project.
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ADU Contractor Services in Perris
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ADU Contractor in Perris FAQ
What is an ADU and why should I build one?
An accessory dwelling unit is a secondary home on your own lot, taking the form of a backyard cottage, a converted garage, or an in-law suite. Building one with Horizon Construction & Remodeling can open a rental income stream, add room for family, or simply give you more usable space on properties throughout Perris, from the slab-foundation tract homes of May Ranch to the older cottages near Downtown.
How much does it cost to build an ADU in California?
What an ADU Actually Costs in Perris
No honest contractor can quote you a firm number from a web page, because the price depends on factors we have to see in person: whether you are converting an existing structure or building new detached construction, how far utility runs need to travel across your lot, what size and finish level you choose, and what site conditions we find when we walk the property. What we can tell you is how the law shapes the cost. State law exempts ADUs of 750 square feet or less of interior livable space from impact fees, limits school fees to units above 500 square feet, and caps connection fees for conversions and junior ADUs because the state does not classify those as a new residential use. Building an ADU also cannot legally trigger a fire sprinkler retrofit on your existing home.
Permitting in Perris runs through the City of Perris Building and Safety Division, and properties near the downtown core may also fall under the Downtown Perris Specific Plan, which adds its own development standards on top of standard zoning. We confirm setbacks, utility conditions, and applicable standards before we give you a fixed scope and price. One warning worth passing along: the CalHFA ADU grant program is closed, its funds fully allocated, and the agency itself states that anyone offering to help you obtain an ADU grant is running a scam.
Do I need permits for an ADU in Perris?
Yes, an ADU always requires a building permit, though approval is ministerial rather than discretionary, meaning no hearing or design review board is involved. In Perris, applications go to the Building and Safety Division within the Development Services Department, and if your property sits in the older downtown core it also falls under the Downtown Perris Specific Plan, which adds its own development standards to review. State law gives the agency 15 business days to confirm completeness and 60 days to approve or deny, though a pre-approved plan shortens that window to 30 days. Horizon prepares and submits the permit package and carries it 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 Perris?
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 the full ADU process in Perris, from design through permitting with the City of Perris Building and Safety Division to finished construction, coordinating every trade so your project meets code and stays within 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?
Reach out to Horizon Construction & Remodeling Inc. to schedule a free estimate, and we will assess your property, talk through your goals, share design recommendations, and give you a detailed quote covering every phase of your ADU project in Perris, including any additional standards that apply if your lot falls within the Downtown Perris Specific Plan area.
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Horizon is a licensed Class B general building contractor serving Perris and the surrounding Orange County communities.
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