Homeowners in Cupertino enjoy the perfect mix of excellent schools, strong property values, and a modern, high-quality lifestyle. At Royalty Builders, we help families in Cupertino make the most of their space with custom home additions tailored to their needs, style, and goals. Whether you’re growing your family, upgrading your kitchen, or planning a second-story expansion, we provide seamless design-build solutions that blend beautifully with your existing home.

From tech-friendly layouts to timeless architectural details, our team brings vision, craftsmanship, and functionality together in every project.

Custom Kitchen Additions in Cupertino

Your kitchen should reflect your lifestyle and meet the needs of a busy household. Our kitchen additions in Cupertino are designed with function, beauty, and innovation in mind. Whether you want an open-concept design, a chef’s kitchen with high-end appliances, or a smart layout for entertaining, we’ll help you expand your kitchen with custom cabinetry, stone countertops, a center island, and energy-efficient lighting.

Stylish Bathroom Additions in Cupertino

A bathroom addition can dramatically improve your daily comfort and your home’s value. Whether you need an extra guest bath or a luxury master suite, our bathroom additions in Cupertino include elegant features like floating vanities, frameless showers, soaking tubs, radiant heated floors, and modern tilework. We build bathrooms that are beautiful, functional, and perfectly integrated into your home’s layout and style.

Beautiful Sunroom Additions in Cupertino

Take advantage of Cupertino’s mild weather with a stunning sunroom addition that brings natural light and outdoor views into your living space. Whether it’s a peaceful retreat, a bright home office, or a flexible family room, our sunrooms are designed for year-round comfort with energy-efficient windows, insulation, and clean, modern finishes that flow with the rest of your home.

Functional Room Additions in Cupertino

Life changes—and your home should adapt with it. Our room additions in Cupertino are perfect for growing families, remote work, or creating space for hobbies, guests, or multigenerational living. We design and build everything from extra bedrooms to media rooms and gyms, always ensuring architectural continuity and interior harmony with your existing structure.

Second Story Additions for Expansive Living

If you love your location but need more space, a second-story addition in Cupertino is the ultimate upgrade. We build upper-level additions with new bedrooms, bathrooms, lofts, or entire living quarters—perfect for large families or future rental income. Our team manages everything: planning, engineering, permits, and construction, ensuring a smooth and stress-free process from start to finish.

Home Addition Costs in Cupertino – What to Expect

We provide honest, clear estimates based on your home’s structure, the project scope, and design complexity. Here’s a general guide to home addition costs in Cupertino:

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 Additions (ground level): $180–$300 per sq. ft.

• Sunroom Additions: $20,000–$70,000+

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

📌 Cupertino’s high-end housing market, permitting requirements, and finish choices may impact final costs. We’ll walk you through everything clearly from the start.

Why Choose Royalty Builders for Your Cupertino Home Addition?

• ✅ Local Experience: We understand Cupertino’s zoning, HOA guidelines, and permit requirements.

• ✅ Design-Build Simplicity: From concept to completion, we manage the entire process in-house.

• ✅ High-End Craftsmanship: We deliver premium finishes and precise construction tailored to your vision.

• ✅ Smart Design: We build for beauty and function—with space optimization, smart tech, and timeless style.

• ✅ Transparent Process: No surprises, clear communication, and a commitment to excellence.

Your Trusted Home Addition Contractor in Cupertino

At Royalty Builders, we know what matters to Cupertino homeowners: quality, efficiency, and a home that reflects your lifestyle. Whether you’re expanding to meet the needs of a growing family or investing in your property’s future, we’ll help you design and build a space that feels natural, intentional, and 100% you.

Contact Us Today

Ready to expand your home in Cupertino? Contact Royalty Builders for a free consultation today. We’ll help you explore your options, design your ideal space, and build with the precision and care your home deserves.
📞 Call us or 📩 fill out our online contact form to get started. Your perfect space is just one step away.

Frequently Asked Questions (FAQ) – Home Additions in Cupertino

Q1: How much does a home addition typically cost in Cupertino?
A: The cost of a home addition in Cupertino varies based on size, design complexity, and finishes. On average:

• Standard Room Addition: Around $300 to $500 per square foot.

• Luxury or Custom Builds: Can exceed $600 per square foot.

For an accurate estimate, we recommend scheduling a consultation based on your specific goals and property layout.

Q2: Do I need a permit for a home addition in Cupertino?
A: Yes, a building permit is required for most home additions in Cupertino. The City of Cupertino requires plans and documents to be submitted for review to ensure code compliance. Our team handles the permitting process for you, from submission to approval.

Q3: How long does a typical home addition project take in Cupertino?
A: Most home additions take between 3 to 6 months, depending on the complexity of the design and the speed of permit approvals. Larger or multi-story additions may take longer.

Q4: Can you match the architectural style of my existing home in Cupertino?
A: Absolutely! We specialize in integrating new additions so they blend seamlessly with the current structure, using matching finishes, rooflines, and materials.

Q5: What types of home additions do you offer in Cupertino?
A: We offer a full range of home addition services, including:

• Bedroom & Living Room Extensions

• Kitchen Expansions

• Second-Story Additions

• Garage Conversions

• Accessory Dwelling Units (ADUs)

Each addition is custom-designed to meet your specific needs, whether it’s adding square footage, improving layout, or increasing property value.