Design Center & Showroom · 614 S Euclid St, Fullerton · Mon–Fri 9am–5pm

#1 ADU Contractor in West Hollywood
Custom Builds by Horizon Remodeling

Horizon Construction & Remodeling Inc. builds accessory dwelling units and home additions for property owners in West Hollywood, managing design, budgeting, permit coordination with the City of West Hollywood Building and Safety division, and material selection from start to final inspection. Because most occupied units here sit inside multifamily buildings on compact lots, many ADU projects involve working within a fixed building envelope rather than breaking new ground, and we coordinate all required trade work through appropriately licensed subcontractors. Contact us today to request a free estimate for your West Hollywood ADU project.

Services We Offer

Room Additions​

Sunroom Additions​

Garages & Conversions​

Extensions​

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.

Finding the right adu contractor in West Hollywood means working with a team that understands how state law, local permitting, and the city’s unusual housing stock all press against each other on the same small lot. California moved its ADU statute into Government Code sections 66310 through 66342 in 2024, and another round of changes took effect January 1, 2026. Square footage is 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 that approval is ministerial, meaning no hearing and no discretionary design review.

In West Hollywood, that application goes to the City of West Hollywood Community Development Department and specifically its Building and Safety division. That matters because Los Angeles County has 88 incorporated cities, and the counter, the fee schedule, and the checklist change from one city to the next even where the underlying state rules do not. A handout pulled from the county’s website does not govern here. West Hollywood runs its own program, and we submit directly to that office.

The city’s housing stock shapes nearly every project we take on. Most of what stands here was built well before incorporation in 1984, including Spanish Revival and Art Deco apartment buildings concentrated around Fountain, Harper, and Havenhurst avenues. The typical occupied unit is part of a multifamily building on a compact lot in a dense grid, not a detached house with a side yard to spare. Roughly 80 percent of occupied units are renter occupied, and West Hollywood adopted one of the strongest rent control ordinances in the state at incorporation, so much of the work we coordinate happens inside multifamily buildings operating under that program.

The lot itself decides most of what is physically possible. We walk the parcel and check setbacks, grade, equipment access, and utility routes before drawing anything, because those site conditions determine whether a garage conversion or a new detached build is the more practical path. State law does set a floor on what a local agency can restrict. 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 fire sprinkler retrofit of the main house. And there are no impact fees on a unit of 750 square feet or less.

We coordinate all the trades a project requires and work directly with the Building and Safety division throughout the permit and inspection process. Scope and site conditions drive cost and schedule, so we discuss both honestly at the start. Contact us to request a free estimate and walk through what your parcel can support.

Other Remodeling Services We Offer

Why Choose Horizon Remodeling As Your ADU Contractor in West Hollywood ?

Horizon Construction and Remodeling builds ADUs in West Hollywood as a licensed Class B general building contractor, bonded, with over 15 years of design-build work behind us. One company draws the plan, carries it through the City of West Hollywood Community Development Department’s Building and Safety division, and builds the finished unit. That single point of accountability matters in a city where the permitting process rewards submittals that are complete and code-compliant from the first submission.

West Hollywood presents a specific set of site conditions. Most of the housing stock predates the city’s 1984 incorporation, and a large share of the occupied units sit inside multifamily buildings rather than on the kind of open residential lot where ADU planning is straightforward. When the existing building envelope is fixed and the lot is compact, we work through access, utility routing, and structural constraints before drawings start, because a plan that ignores those realities becomes a redesign.

We are familiar with the neighborhoods where this work tends to concentrate, including the Norma Triangle, West Hollywood West, West Hollywood Heights, and properties along the Sunset Strip corridor. Where state ADU law and a local ordinance point in different directions, we identify which governs and address it directly in the submittal package. Specialty trade portions of each project are performed by appropriately licensed subcontractors we coordinate throughout the build.

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ADU Contractor Services in West Hollywood

ADU Contractor in West Hollywood FAQ

What is an ADU and why should I build one?

An accessory dwelling unit is a self-contained secondary unit added to your property, such as a converted garage, a backyard cottage, or an attached in-law suite. In West Hollywood, where small lots and dense building stock are the norm, an ADU can generate rental income, house extended family, or simply add usable square footage within your existing footprint.

What an ADU costs in West Hollywood depends on details no contractor can responsibly quote without first seeing your property: the unit size, whether you are converting existing space or building new detached construction, how much site and utility work your particular lot requires, and the finish level you choose. Those variables matter more in a dense city like West Hollywood, where small lots and fixed building envelopes leave little room for assumptions. What the law does make predictable is where your money is protected. An ADU at or below 750 square feet of livable interior space is exempt from impact fees. School fees apply only above 500 square feet. Connection fees for a conversion or junior ADU are limited under state law, because neither is treated as a new residential use. Building an ADU also cannot trigger a fire sprinkler retrofit of your existing structure.

When you submit plans through the City of West Hollywood’s Building and Safety division, the process follows a defined path, and any contractor quoting you a firm number before walking your parcel and confirming setbacks and utility conditions is guessing. We walk the site, work through those specifics, and then give you a fixed scope and price you can hold us to. One point 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 an ADU grant is running a scam.

Yes, an ADU in West Hollywood always requires a building permit, though approval is ministerial rather than discretionary, meaning there is no public hearing and no design review board to clear. Applications go to the City of West Hollywood Community Development Department, Building and Safety division. Under state law, the agency has 15 business days to confirm the package is complete, then 60 days to approve or deny it, and any denial must spell out the specific deficiencies and how to fix them. A pre-approved plan shortens that review window to 30 days. We prepare and submit the permit package and carry it through every inspection, so that burden never falls back on you.

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.

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.

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.

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.

Horizon Construction & Remodeling Inc. manages ADU projects from initial design through final inspection, coordinating permitting with the City of West Hollywood Community Development Department and keeping the work aligned with building codes and your budget. In a city where the housing stock predates incorporation and lots run small and dense, that end-to-end coordination matters.

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.

Reach out to Horizon Construction and Remodeling to schedule a free consultation, where we assess your property, talk through your goals, and deliver a detailed estimate before guiding you through every phase of your West Hollywood ADU project.