Sunnyvale is one of the most desirable cities in Silicon Valley—and your home should reflect that. At Royalty Builders, we offer custom home additions in Sunnyvale that expand your living space, improve functionality, and increase your property value. Whether you’re welcoming a new family member, setting up a home office, or finally building the dream kitchen you’ve always wanted, our experienced team will design and build an addition that perfectly complements your home.

With deep knowledge of Sunnyvale’s neighborhoods, building codes, and design preferences, we ensure that your project is completed smoothly, efficiently, and to the highest standards.

Custom Kitchen Additions in Sunnyvale

Your kitchen should be a space where style meets function. Our kitchen additions in Sunnyvale are perfect for homeowners looking to expand their cooking space, add storage, or open up the layout for better flow. From sleek modern designs to classic family-style kitchens, we specialize in beautiful cabinetry, premium countertops, energy-efficient appliances, and smart layouts. Whether you’re a home chef or an entertainer, we’ll help you build a kitchen that works as hard as you do.

Stylish Bathroom Additions in Sunnyvale

A well-designed bathroom is both practical and luxurious. Whether you need an extra guest bath or a full spa-style master suite, our bathroom additions in Sunnyvale combine modern comfort with timeless style. We install elegant features like walk-in showers, soaking tubs, custom vanities, and radiant heated flooring. Every bathroom is tailored to your needs, your budget, and your vision—adding beauty and convenience to your daily routine.

Beautiful Sunroom Additions in Sunnyvale

Sunnyvale enjoys plenty of sunshine—so why not make the most of it with a custom sunroom addition? Whether you’re looking for a peaceful reading room, a bright dining area, or a multi-use family space, we design sunrooms that are bright, energy-efficient, and usable all year long. We build each sunroom with quality insulation, high-performance windows, and seamless architectural integration, making it a true extension of your home.

Functional Room Additions in Sunnyvale

Need more space without the cost of moving? Our room additions in Sunnyvale offer the flexibility to add bedrooms, playrooms, offices, gyms, or even media rooms. We focus on smart design and construction that blends naturally with your existing layout and structure. Every addition is fully customized, ensuring it meets your space needs and fits the style of your home perfectly.

Second Story Additions for Maximum Living Space

In land-limited areas like Sunnyvale, second-story additions are a smart way to expand without sacrificing your yard. Our second-story additions include everything from extra bedrooms and bathrooms to complete upstairs living areas or guest suites. We take care of all the engineering, design, and permit requirements—delivering a beautiful, structurally sound upper level that looks and feels like it was part of the original home.

Home Addition Costs in Sunnyvale – What to Expect

We know that cost is a big consideration when planning a home addition. At Royalty Builders, we provide detailed estimates with no hidden surprises. Here’s a general cost guide:

Interior Additions

• Kitchen Additions: $250–$400 per sq. ft.

• Bathroom Additions: $25,000–$60,000+

• Second Story Additions: $200–$500 per sq. ft.

Exterior Additions

• Room Extensions (ground level): $180–$300 per sq. ft.

• Sunroom Additions: $20,000–$70,000+

• Garage Conversions/ADUs: Starting around $20,000

🛠️ Prices may vary depending on structural changes, finishes, permits, and site conditions. We walk you through everything upfront.

Why Choose Royalty Builders for Your Sunnyvale Home Addition?

• ✅ Local Expertise: We know Sunnyvale’s regulations, permit processes, and architectural trends.

• ✅ Custom Design Solutions: Every project is tailored to your lifestyle, aesthetic, and budget.

• ✅ Start-to-Finish Service: From concept to construction, we handle it all in-house.

• ✅ Licensed, Insured, Experienced: Our team is highly trained and committed to delivering top-notch results.

• ✅ Customer-Centric: We believe in clear communication, full transparency, and delivering on our promises.

Your Trusted Home Addition Contractor in Sunnyvale

At Royalty Builders, we’re proud to be a go-to contractor for home additions in Sunnyvale and across the South Bay. Whether you live in a classic ranch-style home or a contemporary build, we’ll design an addition that respects your home’s character and improves your lifestyle.

Our work isn’t just about building more space—it’s about helping you live better in the space you love.

Contact Us Today

Ready to expand your home in Sunnyvale? Contact Royalty Builders today for a free, no-pressure consultation. We’ll discuss your goals, assess your space, and provide expert guidance on the best way to bring your vision to life.
📞 Call us or 📩 fill out our quick contact form to get started. Let’s build something amazing—together.

Frequently Asked Questions (FAQ) – Home Additions in Sunnyvale

Q1: How much does a home addition typically cost in Sunnyvale?
A: The cost of a home addition in Sunnyvale varies based on factors such as size, design complexity, and material quality. On average, homeowners can expect to invest between $50,000 to $70,000 for a room addition project. For a precise estimate tailored to your specific needs, we recommend scheduling a free consultation with our team.​

Q2: Do I need a permit for a home addition in Sunnyvale?
A: Yes, obtaining a building permit is required for most home addition projects in Sunnyvale. This includes structural changes, electrical and plumbing work, HVAC systems, and building additions such as decks and patios. Our team manages the entire permitting process to ensure your project adheres to all local codes and regulations. ​

Q3: How long does a typical home addition project take in Sunnyvale?
A: The duration of a home addition project in Sunnyvale depends on the project’s scope and complexity. Generally, such projects can take several months from design to completion, considering factors like permitting, design approvals, and construction phases.​

Q4: Can you match the style of my existing home in Sunnyvale?
A: Absolutely! Our expertise lies in creating seamless additions that harmonize with your home’s current architectural style and finishes, ensuring a cohesive and aesthetically pleasing result.​

Q5: What types of home additions do you offer in Sunnyvale?
A: We provide a diverse range of home addition services, including:​

• Room Additions: Expanding your living space with additional bedrooms, living rooms, or specialized rooms.​

• Second-Story Additions: Adding a new level to your home to maximize space without expanding the footprint.​

• Kitchen Expansions: Enlarging your kitchen area for enhanced functionality and comfort.​

• Accessory Dwelling Units (ADUs): Creating independent living spaces on your property, perfect for rental income or extended family.​

Each project is customized to align with your specific needs, preferences, and budget.

📞 Call us or 📩 fill out our online form to get started. Let’s build something extraordinary—together.​