Our Full Range of Home Renovation Services in the South Bay Area

The best ways to add extra space to your home depend on your lot, budget and family’s needs. Here are some common options:

Room additions: When you love your current home, adding an extra office, bathroom or bedroom gives you more living space.
Second-story additions: Second-story additions can allow you to keep your yard space while increasing your square footage.
Accessory dwelling units: ADUs can provide a private space on your lot for aging parents, a home office or a guest suite.
Garage and basement conversions: Convert underutilized space without adding to your home’s existing footprint.

The cost of a home addition per square foot varies depending on the scope of your project, structural complexity, materials and permits. For example, a garage conversion typically involves less structural work than a room addition or second-story build, which affects the overall investment.

At Valley Home Builders, we offer a free consultation and initial estimate to help you understand costs. Then, our project consultant and principal designer provide a more detailed quote based on your specific design and needs.

From initial contact to completion, most projects take approximately 6-12 months. However, the timeline can vary depending on the scope of your project and your city’s speed of getting plans approved. Oftentimes, the city approval process takes as long, or longer, than the actual building process, especially if the project is a smaller remodel. The cities usually take a month and a half to respond per round of comments after final plans are submitted, with an average of three rounds of comments prior to obtaining the building permit. Once the building permit is acquired, the timeline shifts back into the general contractor’s control. Excluding city approval processing time, remodels, depending on their size, can be anywhere from 3-6 months of building, and new construction can take anywhere from 6-14 months, depending on the scope. During your free consultation, we’ll provide you with your estimated renovation timeline and keep you informed every step of the way through our online portal, which gives you access to your plans, essential documents, and project schedule.

A full home renovation involves structural and layout changes, including redoing the foundation, moving walls, and potentially adding rooms. A partial home remodel focuses on one or two areas of your home with minor to no structural changes. Both enhance your space beautifully — you just choose based on your needs and budget. Our team can discuss which option works best for your home during your consultation.

Our project consultant provides estimates that are typically 95% accurate, so you’ll know what to expect before work begins. Once you approve the budget, you can feel confident moving forward. We emphasize complete transparency throughout the entire project, so any changes you decide on after the contract is signed are discussed and priced with you prior to continuation.

Yes, we handle everything for you — from custom design and architectural planning through engineering, permit handling, and construction. For ADUs specifically, we even offer three pre-approved designs if you’re in a rush, making the process faster and simpler. You can focus on your vision while we manage the logistics.

We guarantee our craftsmanship for one year, and we only use the highest-quality materials on every project. Your satisfaction is important to us, and this guarantee reflects our commitment to excellence and standing behind the work we do.