Custom Home Construction Orange County. From an empty lot to your dream home. We deliver exceptional ground-up residential construction and major additions in Orange County with uncompromising quality and dedicated project management.
Comprehensive Building Solutions
As a licensed Class B General Contractor, we bring engineering knowledge and hands-on expertise to major structural projects.
Ground-Up Custom Homes
Build the home you’ve always envisioned. As leaders in home construction Orange County, we manage the entire lifecycle of your new residential build. From navigating strict local zoning laws and initial site grading to foundation pouring and final architectural finishes, our team ensures your luxury home is built to exact specifications.
Outgrown your current space? We seamlessly integrate large-scale room additions, second-story pop-ups, and structural extensions to match your home’s existing design and boost its value.
Successful home construction Orange County projects require more than just tools; they demand meticulous planning, strict adherence to California building codes, and seamless coordination between architects, engineers, and trades. We ensure your investment is built safely, on schedule, and to the highest industry standards.
How Our Custom Home & Addition Process Works
Step 1 — Pre-Construction & Architectural Review
We collaborate closely with your architects from day one. Our deep background in the construction and operation of buildings and structures ensures your blueprints are mathematically precise, technically feasible, and ready for reality.
Step 2 — Engineering & City Approvals
Navigating California’s strict building regulations requires expertise. As a licensed Class B contractor, we manage the complex permitting process, structural engineering requirements, and Title 24 compliance to keep your project moving without delays.
Step 3 — Structural Construction & Systems
From pouring reinforced foundations to complex framing, we execute the heavy building phases with uncompromising precision. We flawlessly integrate all critical MEP (mechanical, electrical, plumbing) and advanced HVAC systems into the structural framework.
Step 4 — Premium Finishes & Handover
The final phase demands a zero-tolerance approach to detail. We manage the installation of high-end exterior and interior finishes, delivering a meticulously crafted, turnkey home that meets the highest industry standards.
Why Homeowners Choose Coastline Harmony Builders
Licensed Authority & Compliance
As a licensed Class B General Contractor in California, we handle the entire regulatory landscape for you. From strict Orange County zoning and setbacks to Title 24 energy compliance, we ensure your project is 100% legal, permitted, and built to the highest safety standards.
True Turnkey Engineering
We don’t just build; we engineer. From deep foundation pouring and structural framing to advanced HVAC integration and high-end interior finishes, our technical background ensures your custom home or major addition is built to the highest industry standards.
Transparent Local Partnership
Based right here in OC, we pride ourselves on clear communication and fixed-price estimates. No hidden fees or “construction surprises”—just professional, scheduled execution from a local team that understands the Irvine and Newport Beach building landscape.
What Our Clients Say
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Mira Mingalieva
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Absolutely thrilled with our new kitchen! We were looking to update our house in Tustin and decided to go with a dark, modern kitchen design. The team at Coastline Harmony Builders did an amazing job from start to finish. The quality of the custom cabinets is top-notch, with amazing built-in storage and flawless integration of our appliances. Everything feels so premium and sleek. It’s hard to find a trustworthy general contractor, but these guys are the real deal. Highly recommend them for any home renovation!
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Lexie
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Rafael and his team at Coastline Harmony Builders did an incredible job with our kitchen remodel in Irvine. We wanted a high-end look and they delivered perfectly—from the custom cabinet installation to the countertop and lighting coordination. They are very detail-oriented, professional, and kept everything on track. Highly recommend them if you’re looking for a reliable general contractor in Orange County!
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Irina Borovleva
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We hired Coastline Harmony Builders for our kitchen remodel in Irvine, and we had a great experience from start to finish. Rafael helped us with the full process, including demolition, site preparation, cabinet installation, appliance panels, backsplash coordination, and the final finish details. We had a modern flat-panel cabinet system, and everything came out clean, aligned, and very high-end. What we appreciated most was the communication, organization, and how clean they kept the house during the remodel. It was clear that Rafael understands both the construction side and the precision needed for cabinet installation. Highly recommend Coastline Harmony Builders for anyone looking for a reliable kitchen remodeling contractor in Orange County.
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Sasha Kadik
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Coastline Harmony Builders did an amazing job on our home renovation in LA. They completely refreshed our entire house, including a stunning bathroom remodel, but the highlight was definitely the kitchen. We wanted a high-end look, so we ordered IKEA SEKTION boxes and paired them with Semihandmade custom fronts. Rafael and his team handled the complex layout, panel integration, and custom hardware with incredible precision. It’s rare to find a General Contractor who has both the structural expertise for a whole-house refresh and the meticulous attention to detail required for European-style modular cabinetry. Highly recommend them!
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Natalia Grechaniuk
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Coastline Harmony Builders did a fantastic job on our kitchen and bathroom remodel in Woodland Hills. We were really impressed with their project management and attention to detail. They kept the house super clean during the demo phase, and the final result with the new custom kitchen setup is exactly what we wanted. Great communication from start to finish. Highly recommend!
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Анастасія Чорна
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Rafael and his team did an amazing job on our kitchen remodel in Huntington Beach. We ordered the BOXI cabinets by Semihandmade and really needed a solid GC to handle the whole project turnkey. Coastline Harmony Builders took care of everything for us, starting from the demo all the way to the final flawless cabinet installation. Super clean, professional, and zero stress. Highly recommend!
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Marina Ilyushina
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We used Coastline Harmony Builders for our whole house remodel in Mission Viejo and honestly, we couldn’t be happier. We needed a solid general contractor who could handle everything from knocking down walls to giving us our dream kitchen, and they totally delivered. They took care of all the city permits, kept the project on schedule, and the attention to detail is just amazing. The house feels completely brand new. Highly recommend these guys if you have a big project!
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Kate Ivanova
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We hired Coastline Harmony Builders for a garage conversion project in Newport Beach. Rafael is a highly professional general contractor who managed everything perfectly from start to finish. If you’re looking for a reliable ADU builder in Orange County, look no further!
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Ryma Rashytava
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Rafael and his team did an awesome job on our bathroom remodel in Irvine. We had an old tub converted into a walk in shower and it looks fantastic. They were professional, kept the house clean, and finished right on time. Highly recommend Coastline Harmony Builders!
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Natalia Borzenko
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Rafael and his team at Coastline Harmony Builders did an amazing job on our Irvine kitchen remodel. We were a bit stressed about the whole demo and electrical process, but they handled it all so smoothly. The custom cabinet fronts look incredible, and they actually kept the house clean while working. Great communication the whole time. We absolutely love our new kitchen!
New Home Construction Service Areas
Coastline Harmony Builders provides custom home construction and residential building services in Orange County, including Newport Beach, Laguna Beach, Corona del Mar, Irvine, Dana Point, and surrounding coastal communities.
Custom Home Construction Orange County FAQ
How long does it take to build a custom home or major addition in Orange County?
The timeline varies based on the scope. A ground-up custom home typically takes 12 to 18 months from the moment permits are approved. Major additions or second-story pop-ups usually range from 4 to 8 months. We prioritize efficient project management to meet established deadlines.
Do you work with my architect or provide design services?
We excel at collaborating with your chosen architect or designer. We step in to provide practical construction feasibility, structural oversight, and seamless execution of the approved architectural blueprints.
What is involved in a second-story addition or “pop-up”?
Major additions require significant engineering to ensure the existing foundation and framing can support the new load. We handle structural reinforcements, seamless roofline integration, and the complex extension of all HVAC, plumbing, and electrical networks.
Why is a Class B license crucial for custom home building?
A Class B General Building Contractor license is legally required in California for any project involving framing or multiple unrelated trades. It ensures your builder has the verified engineering expertise, insurance, and legal authority to manage complex, multi-phase structural projects safely.
Photography and renderings shown on this page are for illustrative and inspirational purposes, representing the design styles, materials, and quality standard of our turnkey installations.
Ready to Build Your Legacy?
Partner with Coastline Harmony Builders to bring your custom home or major addition to life. Let’s discuss your blueprints and vision. Кнопка: Book A Consultation. Start your home construction Orange County journey with a trusted local contractor today.
