Whole Home Remodeling in Cowan Heights
Whole home remodeling in Cowan Heights draws a specific kind of homeowner: someone who bought into these foothill lots for the views and the space, and who has no interest in leaving, but whose house no longer works the way they need it to. Most of the custom and semi-custom homes up here went in during the 1960s and into the decades that followed, built out gradually as the old Cowan Heights Ranch land passed to homebuilders. That origin shows in the floor plans. Kitchens sit closed off from the rest of the house, split-levels create awkward transitions between living areas, and the electrical and plumbing systems underneath it all are well past the point where a coat of paint fixes anything.
A whole home remodel addresses that as a single coordinated project. We move walls to open the floor plan, update plumbing and wiring to current standards, and rework several rooms at once under one permit pulled through OC Development Services, since Cowan Heights sits in unincorporated county territory rather than inside any city limits. The hillside terrain and the long private driveways that are common here affect how we stage materials and sequence the work, so planning for site access starts at the first walk-through, not after construction begins.
Services We Offer
Structural & Seismic Work
Roof, Windows & Envelope
Additions & ADUs
Our Whole Home Remodeling Process in Cowan Heights
A whole home remodel in Cowan Heights starts before anyone picks up a tool. We walk the entire house, not just the rooms on your list. That means the attic, the crawl space or slab, the electrical panel, and the supply lines. Many of the hillside homes here went up in the 1960s and were added to or altered in the decades that followed, so we look carefully at any framing that may have been modified by a previous owner. Where something is in doubt, we investigate first: a sewer camera, asbestos testing on textured ceilings, a structural assessment of the walls. Once we know what is actually there, we draw the existing house and the proposed new layout together, so you can review and revise on paper, where changes cost nothing.
From those drawings we develop the full permit package, which includes structural engineering and Title 24 energy documents in a single submission. Because Cowan Heights is unincorporated county territory, permits go through OC Development Services rather than a city building department, and the North Tustin Specific Plan governs land use here. We account for that early. The hillside terrain and long private driveways also shape how we plan material deliveries and equipment staging, so those details are worked out before demolition begins. Selections for cabinets, tile, flooring, and fixtures throughout the house are finalized at our Fullerton office ahead of that first day of work.
Construction follows a fixed sequence: demolition, structural work, rough plumbing, electrical, and mechanical, then inspections, insulation, drywall, and finishes. Many split-level homes in the area have kitchens laid out as enclosed rooms rather than open plans, and reconfiguring that kind of layout is far cleaner when the plumber reroutes supply and drain lines once, in the right place, rather than working around a patchwork of past projects. One project manager stays on the job from that first walk-through through the final county inspection, so nothing falls through between trades.
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A whole home remodel in Cowan Heights almost always requires a full building permit with plan check, because the work touches structure, plumbing, electrical and mechanical systems at the same time. Permits for this work go through OC Development Services, not a city building department, because Cowan Heights is unincorporated county territory inside North Tustin. The county’s North Tustin Specific Plan also sets the land use districts here, which can affect exterior materials, setbacks and the review path before a single wall comes down. Hillside terrain and long private driveways are a practical factor too. We check access and staging conditions at the start of every project, because they can shape how materials are delivered and how the construction schedule is built, and it is better to know that before the permit application goes in rather than after.
The age of the housing stock drives most of what we find once walls open up. Homes built in the 1960s and into the 1970s are common in these foothill neighborhoods, and houses from that era frequently contain lead-based paint. Contractors who disturb lead-containing surfaces must follow the EPA Renovation, Repair and Painting rule; Horizon is an EPA Lead-Safe Certified Firm, so that protocol is built into how we work, not added as an afterthought. Popcorn ceilings, certain older resilient flooring and duct wrap from the same period can contain asbestos. We test suspect materials before any removal begins, and if abatement is needed, it goes to a licensed abatement contractor. Galvanized supply lines corrode from the inside out over decades, and electrical panels in houses of that era were typically sized for far less load than a modern household puts on them. A whole home remodel is the right time to address both, while the walls are already open and the cost of access is already spent.
Two state rules come up on nearly every whole-house job in California. Civil Code 1101.4 requires that older high-flow toilets, showerheads and faucets be replaced with water-conserving fixtures on many permitted remodels of homes built before 1994, so we put the compliant fixtures in the schedule at the planning stage rather than scrambling at final inspection. California’s Title 24 energy code applies to remodels as well as new construction. New windows, insulation, lighting and any mechanical changes all have to meet the current standards, and we prepare the compliance documentation with the plans so the plan check reviewer has what they need from the first submittal.
Structure is the other major variable in these custom hillside homes. Many of the kitchens in Cowan Heights were built as separate rooms, and homeowners who want to open that space to the living area are looking at a load-bearing wall in most cases. Removing it means an engineered beam, posts, and sometimes new or reinforced footings, all of which require structural drawings and inspection. Raised-floor construction is common in split-level hillside houses, and foundation bolting with cripple-wall bracing is worth addressing while the work area is already accessible. Unpermitted additions, enclosed patios and garage conversions from past decades show up regularly in homes of this era, and OC Development Services will require those to be legalized, brought up to current code or rebuilt before the rest of the remodel can receive a final sign-off. If additional living space is also part of the goal, state law allows an accessory dwelling unit on most single-family lots, and it can be planned through the same permit process as the remodel to reduce the total administrative load.
Other Remodeling Services We Offer
A kitchen remodel touches more trades than any other room in the house: layout, cabinetry, plumbing, electrical, ventilation and finishes. Horizon designs and builds kitchen remodels under one contract, from the measured layout to the final inspection.
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 For Whole Home Remodeling in Cowan Heights
Homeowners in Cowan Heights tend to have older houses with good bones and real potential, and a whole home remodel is exactly the kind of project a Class B general building contractor is built for. A B license covers work that spans multiple trades, structural changes, and a single coordinated permit, rather than one specialty task done in isolation. Horizon Construction and Remodeling has held an active Class B license since 2009 and is licensed and bonded, so the credentials behind the work match the scope of the job.
One thing that sets our approach apart is that the drawings, engineering coordination, permits, and construction all sit under one contract with one project manager. You are not relaying messages between an architect and separate trades. The people who worked on the floor plan are in direct contact with the crew building it, which cuts down on the miscommunication that typically drives up cost and time on large projects. Finishes for every room are selected together in Fullerton, which keeps the kitchen, bathrooms, and flooring consistent from one end of the house to the other.
We are also straightforward about the parts of a remodel that are harder to hear. We will tell you honestly whether staying in the house during construction is realistic, what an older Cowan Heights home is likely to need behind the walls once work begins, and which items can reasonably wait without costing more down the road.
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Whole Home Remodeling FAQ
How is a whole home remodel different from a regular home remodel?
A typical remodel updates one room and works around the rest of the house, while a whole home remodel treats the structure as one system. Several rooms are redone at once, walls may be moved or removed to change the floor plan, and plumbing, electrical, and HVAC are updated throughout. For the custom and split-level hillside homes common in Cowan Heights, that integrated approach matters, because rerouting a single system often touches multiple levels. Everything is drawn, permitted, and sequenced together, so trades come through once instead of reopening finished work later.
What's the difference between a whole home remodel and a complete home renovation?
The two terms overlap more than most people realize. A remodel typically means changing the layout or updating finishes, while a renovation focuses on restoring what the house already has: structure, roof, windows, plumbing, wiring, and heating and cooling systems. In practice, most whole home projects in Cowan Heights end up being some of both, because homes built from the 1960s onward often need system upgrades before new finishes make sense. We scope everything together, addressing anything that protects the house first, then systems that are hard to reach once walls close, then the finishes you see every day.
Do we have to move out during a whole home remodel?
It depends on the scope of your project. If we are pulling out the kitchen and every bathroom at the same time, or taking floors and drywall down throughout the house, most families move out for at least the heaviest phases of the work. The larger custom and split-level homes common in Cowan Heights sometimes allow us to phase the work, keeping one bathroom functional and setting up a temporary kitchen in another room so you can stay put. Phasing adds time to the schedule, though, so we walk through that trade-off with you once the plan is drawn.
How long does a whole home remodel take?
A whole home remodel typically runs several months in construction alone, and design and permitting often take just as long before a single wall comes down. Because Cowan Heights is unincorporated county territory, permits go through OC Development Services rather than a city building department, and plan check can run several weeks or more depending on the scope and the reviewers’ workload. Structural work, additions, or surprises behind the walls of a 1960s hillside custom home will extend that timeline further. We build a schedule specific to your house when we present the proposal, and starting the drawings early is the single biggest lever you have on your move-back-in date.
Who handles the permit for a whole home remodel in Cowan Heights?
We handle the permit from start to finish. Because Cowan Heights is unincorporated county territory inside North Tustin rather than part of any city, permit applications for a whole home remodel go through OC Development Services, not a municipal building department. Our team prepares the plan set, including structural engineering and Title 24 energy documents, submits everything, and responds to plan-check comments until the permit is issued. Throughout construction we schedule and attend each required inspection, and we close the permit out at final.
What drives the cost of a whole home remodel?
Cost is driven by the scope of structural and systems work your home actually needs, and two houses the same size can land far apart. Removing a load-bearing wall, relocating a kitchen or bathroom, repiping, rewiring, or upgrading an electrical panel all add up quickly, as does any lead or asbestos handling that older construction sometimes requires. Because many homes in Cowan Heights are custom split-levels built from the 1960s onward, the structural picture varies considerably from one property to the next. Your proposal breaks every item out line by line, separating work that must be done from choices that are up to you.
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Horizon is a licensed Class B general building contractor serving Cowan Heights and the surrounding Orange County communities.