Home Additions & Expansions in Gilroy, CA

When we think about our homes, it’s often the memories made within those walls that matter most. But as our lives change—whether it's a growing family, new hobbies, or an urge for more space—the need to adapt can spark ideas for home additions and expansions. Many of us find ourselves debating whether to renovate, expand, or even move. Michael Marini Construction is here to bring your vision to life, making those dreams a reality with custom solutions tailored just for you.

Serving Gilroy and surrounding communities for over 20 years, our team knows how to blend new spaces seamlessly with your existing home. Whether you’re dreaming of a spacious new family room, a primary suite, or a second story, we help you add square footage in a way that looks natural, functions beautifully, and increases the long-term value of your property. 

What Is a Home Addition or Expansion?

A home addition or expansion is the process of enlarging your existing house to create more livable space, improve functionality, and better suit your lifestyle. Whether your family has grown, your needs have changed, or you simply want to upgrade your home without the hassle of moving, an addition offers a smart, long-term solution.

Unlike simple interior renovations, additions involve building new square footage—either outward or upward—while maintaining the architectural integrity of your home. At Michael Marini Construction, we specialize in crafting seamless additions that blend perfectly with your existing layout so your home feels cohesive and complete. Here are the most popular types of home additions we design and build for homeowners in Gilroy:

Kitchen Expansions

The kitchen is often the heart of the home, and when it feels too small or outdated, the entire house can suffer. A kitchen expansion allows you to create a spacious, open-concept area perfect for cooking, dining, and entertaining. Whether you're dreaming of a large center island, additional storage, or upgraded appliances with room to move around, expanding your kitchen can bring everyday comfort and long-term value.

Bathroom Additions

As households grow or needs change, adding a bathroom can make a world of difference. Whether you're looking to create a spa-like ensuite, a powder room for guests, or an additional full bath to reduce morning traffic, a bathroom addition boosts convenience and luxury. It's one of the most impactful ways to improve both your home’s function and resale appeal.

Bedroom Suites

A bedroom suite addition goes beyond simply adding another bedroom. It's about creating a private oasis—complete with a generous sleeping area, walk-in closet, and attached bathroom. Ideal for homeowners seeking more privacy, space, or comfort, this type of addition is perfect for aging in place, welcoming in-laws, or upgrading your primary bedroom experience.

Family Rooms

Adding a family room provides a comfortable, casual space for everyone to gather. Whether you need a place for movie nights, game days, or just relaxing after a long day, a family room offers the flexibility to serve a wide range of activities. This type of addition is especially valuable in homes with formal layouts that lack an open, inviting space for connection.

Second-Story Additions

When your property’s footprint is limited but your space needs are growing, a second-story addition lets you expand vertically. This approach is ideal for homeowners who want to double their square footage without losing valuable outdoor space. A second story can include multiple bedrooms, bathrooms, or even a private apartment-style layout, all while preserving your lot and landscaping.

First-Floor Remodel with an Addition

Occasionally, it’s not just about adding space—it’s about reimagining how your main level works. A first-floor remodel combined with an addition allows you to redesign your layout while adding the square footage you need. Whether it's opening up walls to create better flow, building out to expand your kitchen and dining area, or adding a mudroom or guest room, this approach transforms how your home functions day to day.

At Michael Marini Construction, our goal is to help you design and build additions that feel like they’ve always belonged. From concept to completion, we focus on quality, communication, and craftsmanship—delivering expanded spaces that support your lifestyle and improve your home’s long-term value.

Our Home Addition Process

At Michael Marini Construction, we pride ourselves on delivering high-quality home expansions. From the first conversation to the final walkthrough, we ensure that every detail aligns with your vision and needs.

Step I - Initial Consultation

We start with an initial consultation that sets the groundwork for your project. During this meeting, we take the time to listen carefully to your ideas, assess your budget, and outline your requirements. It’s our first chance to understand what you want to achieve with your new space, whether you’re dreaming of a cozy sunroom or a sleek kitchen extension.

Additionally, we discuss zoning regulations and any permits that need to be obtained, as well as potential challenges specific to your location in Gilroy. This initial exchange is crucial—it's where the journey begins, and we find it empowering to help you define your goals.

Step II - Designing Your Space

With a clear understanding of your needs from our consultation, we move into the design phase, which is truly a collaborative effort between you and our skilled architects.

Our designers then translate your ideas into detailed plans tailored specifically for you. Utilizing advanced software and 3D modeling tools, we create visual representations of how your space will look once complete. The process allows you to visualize the result and provides opportunities for adjustments before construction commences.

Step III - Construction Phase

Once the designs are finalized and approved, we transition into the construction phase. Here, experienced project managers take charge, overseeing all aspects of construction with precise attention to detail. They ensure that everything stays on schedule and within budget while maintaining open lines of communication with you throughout the entire process.

Regular updates keep you informed about progress—whether it's greeting you on-site or sending pictures of key milestones, we want you engaged every step of the way. Our commitment is not only to quality workmanship but also to making sure that you feel confident in our process.

Step IV - Final Inspection and Approval

Finally, once construction wraps up, we conduct a meticulous final inspection and walkthrough.

This step ensures that everything aligns with both local building codes and your original expectations—a critical part of ensuring satisfaction before we officially hand over your newly expanded space.

Our streamlined process provides peace of mind at every stage, establishing a foundation rooted in trust as we embark on creating spaces that enhance property value and ensure long-term satisfaction.

Why Choose Michael Marini Construction?

Choosing the right contractor for your home addition is a big decision. You’re not just hiring someone to build—you’re trusting a team to work inside your home, follow through on promises, and bring your vision to life. That’s why so many homeowners in Gilroy and nearby communities continue to choose Michael Marini Construction. For us, it’s about more than construction—it’s about building trust, one project at a time.

Deep Roots in the Gilroy Community

For over 20 years, we’ve proudly served Gilroy and surrounding areas, working on homes of all sizes and styles. We understand the local building codes, permitting processes, and architectural styles that define this region. Our experience in the area gives us a clear advantage when it comes to designing additions that fit seamlessly into existing structures while meeting all regulatory requirements.

Truly Custom Builds

Every home—and every homeowner—is different. We don’t reuse the same design for multiple projects or rely on cookie-cutter plans. Instead, we listen to your needs, learn how you live, and create an addition that works perfectly for your lifestyle and property. Whether it’s a second story or a spacious new kitchen, your space will be designed with purpose and built just for you.

Clear, Honest Communication

We believe that transparency should be a given, not a luxury. From the very first meeting, we walk you through the process step by step. We explain your options, talk through timelines and costs, and provide regular updates as your project progresses. If something needs to change, you’ll hear it from us right away, along with a clear explanation and a solution.

Built to Last, Built to Live In

We treat every home like it’s our own. That means using high-quality materials, hiring experienced tradespeople, and following construction best practices from day one. The result is an addition that not only looks beautiful on the outside but is built to perform, so you can enjoy your new space for years to come without worrying about repairs or premature wear.

Let’s Build the Space You’ve Been Dreaming About

If your home is starting to feel too small—or not quite right—an addition or expansion could be the perfect solution. At Michael Marini Construction, we help you stay in the home you love while creating the space you need.

For a free quote on your next home addition project in Gilroy, contact us at Michael Marini Construction or call us at 408-310-8732 today!