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

#1 ADU Contractor in Talbert
Custom Builds by Horizon Remodeling

Horizon Construction & Remodeling Inc. builds accessory dwelling units for homeowners in Talbert, the area now known as Fountain Valley, where most homes are tract houses from the 1960s and 1970s sitting on flat rectangular lots that often have room for a backyard cottage or detached unit. We handle design coordination, budgeting, material selection, and permit applications through the City of Fountain Valley Building and Safety Division, keeping the project on track with current building code requirements from start to final walkthrough.

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.

Working as an adu contractor in Talbert means working within the City of Fountain Valley Building and Safety Division, since Talbert is the pre-1957 name for what is now Fountain Valley and exists today only as a neighborhood identity rather than a separate municipality. Applications go there, plan check happens there, and the inspectors who sign off on your project are on staff there. California ADU law, codified in Government Code sections 66310 through 66342 and updated as of January 1, 2026, sets the timeline: the agency has 15 business days to determine whether a submittal is complete and 60 days to approve or deny it. Approval is ministerial, meaning no public hearing and no discretionary design review.

The 2026 update also clarified how square footage is counted, measuring interior livable space rather than gross area. State law sets firm floors on what a local agency can require: a unit cannot be capped below 850 square feet, or 1,000 square feet with more than one bedroom. Side and rear setbacks cannot exceed four feet, owner-occupancy cannot be imposed as a condition, and there are no impact fees on units of 750 square feet or less.

The housing stock shapes the conversation considerably. Talbert’s homes are almost entirely tract houses built on flat rectangular lots through the 1960s and 1970s, platted on a master-planned grid after farmland gave way to residential development following the 1957 incorporation. That geometry is generally favorable for ADU work. Setbacks tend to be predictable, grade changes are minimal, and utility runs are usually straightforward.

Even so, we walk every parcel before drawing anything. Setback lines, equipment placement, utility routing, and the relationship between the existing garage and the rear yard all influence whether a detached new build or a garage conversion makes more practical sense. No unusual local overlay applies here, so the building code and any applicable association rules are what govern, which keeps the analysis relatively clean once the site conditions are confirmed.

Other Remodeling Services We Offer

Why Choose Horizon Remodeling As Your ADU Contractor in Talbert ?

Horizon Construction and Remodeling is a licensed Class B general building contractor, bonded, with over 15 years of design-build work. A detached ADU is a complete small dwelling: foundation, framing, roof, electrical service, plumbing, kitchen, and bathroom, placed on a lot that already has a primary residence. Because Talbert is the historical name for what is now Fountain Valley, permits for any ADU project in this area go through the City of Fountain Valley Building and Safety Division, and we manage that process from the first submittal through final inspection.

The tract houses built across Fountain Valley neighborhoods like Green Valley, Los Caballeros, Tiburon, and Southpark during the 1960s and 1970s typically sit on flat rectangular lots, which generally work well for detached ADU placement. Where an HOA governs the property, we prepare that submittal alongside the building permit application rather than treating it as a separate step.

Design-build matters on an ADU because the structural decisions and the design decisions are inseparable. One team draws it, permits it, and builds it, keeping scope and responsibility clear throughout construction.

Schedule a Consultation

Clients Love

ADU Contractor Services in Talbert

ADU Contractor in Talbert FAQ

What is an ADU and why should I build one?

An accessory dwelling unit is a secondary home on your existing property, built as a backyard cottage, a garage conversion, or an in-law suite. Adding one to a 1960s or 1970s tract lot in Fountain Valley lets you generate rental income, house a family member independently, or simply gain usable living space.

What an ADU Actually Costs in Talbert

No contractor can give you a reliable number without first seeing your property, and that is as true in Talbert as anywhere else in Southern California. The final cost depends on whether you are converting an existing space or building a new detached unit, how much site and utility work your flat rectangular lot requires, and the finish level you choose. What state law does spell out is where certain costs are capped: 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. Building an ADU also cannot legally trigger a fire sprinkler retrofit of your existing home.

Because Talbert is now Fountain Valley, all permits run through the City of Fountain Valley Building and Safety Division, and the tract homes that filled in this area through the 1960s and 1970s sit on flat, rectangular lots that each present their own setback and utility conditions. We walk every parcel before quoting, confirm those site specifics, and then give you a fixed scope and price. One warning worth stating plainly: the CalHFA ADU grant program is closed, its funding fully allocated, and the agency itself cautions that anyone promising to help you obtain that grant is running a scam.

Yes, an ADU always requires a building permit, though approval is ministerial rather than discretionary, meaning there is no public hearing and no design review board to satisfy. Because Talbert is the pre-1957 name for what is now Fountain Valley, applications for properties in this area go to the City of Fountain Valley Building and Safety Division. State law gives the agency 15 business days to confirm completeness and 60 days to approve or deny a submittal, and a pre-approved plan shortens that review to 30 days. Horizon prepares and submits the full package and sees it through every inspection rather than returning that work to the homeowner.

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. handles ADU design, permitting through the City of Fountain Valley Building and Safety Division, and construction on the flat, rectangular lots common across Fountain Valley’s 1960s and 1970s tract neighborhoods, managing the full process so your project meets code and stays within budget.

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 & Remodeling Inc. to schedule a free estimate, where we assess your property, talk through your goals, offer design recommendations, and deliver a detailed project estimate covering every phase of your ADU build.

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.