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When your home starts to feel a little too tight or your needs have outgrown your square footage, you don’t have to move—you can improve. At E. Arias & Co, we specialize in designing and building beautiful, functional, and seamless home additions in Berkeley, CA. Whether you’re dreaming of a new master suite, expanding your kitchen, or adding a second story, we bring your vision to life with craftsmanship you can trust.
Home additions are one of the most rewarding investments a homeowner can make. Not only do they enhance your lifestyle, but they also significantly increase the value and appeal of your property. With decades of experience serving Berkeley and surrounding areas, our team is committed to helping homeowners maximize both space and comfort.
At E. Arias & Co, we handle all types of home addition projects, both large and small. Every addition is custom-tailored to match your home’s architecture, your family’s lifestyle, and your long-term goals.
Need an extra bedroom, home office, or guest suite? Room additions are a smart way to add space without compromising the flow of your existing home. We carefully integrate new structures so that they look and feel like part of the original layout.
Outgrowing your current kitchen? We specialize in kitchen bump-outs and extensions that add square footage, natural light, and updated functionality. More room for cooking, entertaining, and gathering—what’s not to love?
Adding a new bathroom can improve convenience and add significant resale value. Whether you need a powder room, full bath, or a luxurious master ensuite, we make it happen with quality materials and elegant design.
When building out isn’t an option, building up is the answer. Second-story additions are perfect for homeowners who want to double their living space while maintaining their backyard. We handle everything from structural engineering to staircase design.
As housing needs evolve, ADUs are becoming a popular choice in the Bay Area. Our team can help you add a fully functional unit above a garage, in a backyard, or as a home extension—perfect for guests, in-laws, or rental income.
Choosing the right contractor for your home expansion project is critical. Here’s why E. Arias & Co is the trusted name for home additions in Berkeley, CA:
Berkeley has a unique blend of historic and contemporary architecture, along with strict permitting regulations. Our team understands local zoning laws, design preferences, and city approval processes to keep your project smooth and compliant.
We are a full-service design-build firm, meaning we take your project from concept to completion. You’ll benefit from a single point of contact, streamlined communication, and a cohesive design-to-construction experience.
We don’t believe in cookie-cutter solutions. Every addition we build is customized to fit your style, space, and goals. Our craftsmanship reflects the pride we take in making your home better.
From the initial consultation and proposal to final walkthrough, you’ll always know what to expect. We provide detailed timelines, clear pricing, and frequent updates throughout the project.
Creating a seamless home addition is a step-by-step process. At E. Arias & Co, we make it as smooth and stress-free as possible:
Adding space to your home isn’t just about square footage—it’s about upgrading your lifestyle. Here’s what you can expect from a professionally built home addition:
When it comes to home additions in Berkeley, CA, E. Arias & Co helps you make the most of every square foot—strategically and beautifully.
Our goal is to make sure your new space blends perfectly with the old, both visually and structurally. From architectural design to the last finish nail, we build with intention and integrity.
Our home base is in Berkeley, CA, and we’re proud to serve homeowners across the East Bay. We understand the architectural character and planning nuances of each local neighborhood, including Elmwood, Claremont, North Berkeley, and Southside.
If you're exploring options for home additions in Berkeley, CA, E. Arias & Co is the local partner you can trust to do it right the first time.
Q: How long does a typical home addition take? A: Most additions take 3–6 months, depending on complexity and permitting. We’ll provide a detailed timeline during the planning phase.
Q: Do I need a permit for a home addition in Berkeley? A: Yes, permits are required. We handle all applications and work with local building officials to keep everything compliant.
Q: Can I stay in my home during the construction? A: In most cases, yes. We take extra care to minimize dust, noise, and disruptions to your daily routine.
Q: How much does a home addition cost in Berkeley, CA? A: Costs vary widely based on the size, scope, and materials used. Contact us for a custom quote tailored to your needs.
Don't settle for a home that no longer fits your lifestyle. Let E. Arias & Co turn your dreams into square footage with expertly crafted home additions in Berkeley, CA. From concept to completion, we build spaces that feel like they’ve always belonged.