#1 ADU Contractor in Wrightwood
Custom Builds by Horizon Remodeling
Horizon Construction & Remodeling Inc. builds accessory dwelling units and home additions for property owners in Wrightwood, handling design coordination, budgeting, permitting through San Bernardino County Land Use Services, and material selection from start to final walkthrough. Many lots here trace back to the old Swarthout ranch subdivision, leaving compact footprints with tight side yards, steep snow-load roofs, and cabin-style layouts that require careful planning before a detached or attached ADU can take shape. We coordinate every trade involved so the finished unit meets county Mountain Region requirements and your needs.
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.
Read More →
Finding the right adu contractor in Wrightwood starts with understanding a permit process that differs from nearly every other community we work in, because Wrightwood is unincorporated county territory and all applications go to San Bernardino County Land Use Services, Building and Safety rather than a city building department. California consolidated its ADU law into Government Code sections 66310 through 66342 in 2024, and the rules shifted again on January 1, 2026, with square footage now measured as interior livable space. An agency has 15 business days to determine whether an application is complete and 60 days to approve or deny it, and approval is ministerial, meaning no public hearing and no discretionary design review.
San Bernardino County adopted Development Code Chapter 84.36 at the Board of Supervisors on January 13, 2026, making it the most current county ADU ordinance among the areas we serve. Published standards allow an ADU from 200 up to 1,200 square feet, a junior ADU to 500 square feet, 25 feet of height for an attached unit and 18 feet for a detached one with two additional feet permitted to match a roof pitch, and four-foot side and rear setbacks with five feet of separation between detached structures. Two points stand apart from coastal county rules: two ADUs per lot are allowed, and properties of five acres or more may accommodate three units.
Mountain Region building requirements add a layer that flat-land projects never face. County standards call for an 18-inch frost line depth, snow load design throughout the structure, and sliding snow protection at exits. Those requirements directly shape foundation depth, roof framing, and where entry doors can safely be placed on a detached unit.
Sewer feasibility is often the first question that determines whether a project moves forward at all. Connection is required when a sewer line runs within 200 feet of the property line, with that distance increasing by 100 feet for each additional dwelling unit. When a line is not close enough, the project relies on septic or advanced treatment. We bring Environmental Health into the conversation before a plan is drawn, not after, because a septic determination affects lot coverage and setbacks in ways that reshape the entire design.
The lot itself shapes most of what remains. Wrightwood grew from the breakup of the Swarthout ranch, with a community established by the 1920s and many downtown resort cabins dating to the 1930s, then filling in through the later twentieth century to a median year built of 1976. The typical home is a one or two story cabin or small house sitting close to the street on a lot near the 10,000 square foot minimum, with a steep snow-shedding roof, a compact kitchen off the main living room, and very little side yard to build into. That geometry determines where a detached unit can realistically sit and how far utilities will need to run to reach it, which is information we gather at the start rather than discover mid-project.
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 Wrightwood ?
ADU Construction in Wrightwood
Horizon Construction and Remodeling is a licensed Class B general building contractor, bonded, and in business since 2009. We handle the full scope of an ADU project under one contract: planning, permit coordination, and construction. Because Wrightwood sits in unincorporated San Bernardino County territory, permits run through San Bernardino County Land Use Services, Building and Safety rather than a city hall, and the county’s Mountain Region standards govern the build. That means feasibility questions come first: sewer or septic, percolation, well access, fire hazard zone classification, and which county region the parcel falls in.
The physical conditions here are meaningfully different from a valley-floor project. County Mountain Region rules require an 18-inch frost line depth, snow load design, and sliding snow protection at exits. Both the structure and the plumbing reflect those requirements, and we account for them before a single plan sheet is drawn.
State law protections apply regardless of location: no owner-occupancy requirement, no sprinkler retrofit of the main house triggered by the ADU, and no impact fees on a unit with 750 square feet or less of interior livable space. We work throughout Wrightwood, including Swarthout Valley, Big Pines, the Mountain High resort area, and downtown Wrightwood.
Schedule a Consultation
ADU Contractor Services in Wrightwood
View Our ADU Contractor Areas of Service
ADU Contractor in Wrightwood 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, and building one can add rental income, house extended family, or expand your living space. Because Wrightwood sits in unincorporated San Bernardino County, permits run through County Land Use Services rather than a city building department, and designs must meet mountain-region snow load and frost line requirements.
How much does it cost to build an ADU in California?
What an ADU costs in Wrightwood depends on details no contractor can assess from a distance: whether you are converting an existing structure or building a detached unit from scratch, how much site work your lot demands, where utilities need to run, and what finish level you want. Because permits here go through San Bernardino County Land Use Services rather than a city building department, the review process follows county Mountain Region standards, and that shapes both scope and schedule in ways that vary lot to lot. We walk the property first, confirm setbacks, utility connections, and structural requirements, and then give you a fixed scope and price you can hold us to. Anyone quoting firm numbers before seeing the parcel is guessing.
California state law does protect you on several cost items regardless of where you build. An ADU under 750 square feet of livable space is exempt from impact fees, school fees apply only above 500 square feet, and connection fees for a conversion or junior ADU are limited because the state does not classify those as a new residential use. A new ADU also cannot trigger a fire sprinkler retrofit of your existing home. One warning worth repeating: the CalHFA ADU grant program is closed, its funding 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 Wrightwood?
Every ADU in Wrightwood requires a building permit, and because Wrightwood is unincorporated county territory rather than a city, that application goes to San Bernardino County Land Use Services, Building and Safety. County Mountain Region rules shape the technical requirements, so plan documents must address snow load design, sliding snow protection at exits, and the 18 inch frost line depth that comes with the elevation here. Where a property relies on a well or septic system, Environmental Health joins the review, and the sewer proximity rule is checked regardless. Horizon manages the submittal, the correction cycles, and every scheduled 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 Wrightwood?
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 Wrightwood from design through final inspection, coordinating permitting with San Bernardino County Land Use Services and keeping the work aligned with county Mountain Region requirements such as snow load design and frost line depth.
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? Contact Horizon Construction & Remodeling Inc. to schedule a free estimate, where we assess your Wrightwood property, discuss your goals, and walk you through every phase of your ADU project from design to final inspection.
Explore More in Wrightwood
Horizon is a licensed Class B general building contractor serving Wrightwood and the surrounding Orange County communities.
Other Services in Wrightwood
ADU Contractors Nearby
Related Posts About ADU
