As your life evolves, your home should grow with it. Whether you’re expanding your kitchen, adding a sun-filled room, or building an entirely new second story, Royalty Builders is here to help you reimagine your space with sophistication and ease.

In South San Francisco, where every square foot counts, our team designs and builds home additions that blend functionality with beauty—while honoring your home’s existing style. From concept and permits to final construction, we handle every step in-house for a streamlined, stress-free experience.

Custom Kitchen Additions in South San Francisco

Your kitchen should be more than functional—it should be a space you love to live in. Whether you’re entertaining guests or making family dinners, a well-designed kitchen addition adds room to move, gather, and enjoy.

In South San Francisco, where older homes often feature smaller, closed-off kitchens, our additions open things up—introducing expansive layouts, natural light, and improved workflow. Think oversized islands, custom cabinetry, professional-grade appliances, and seamless transitions into dining or living spaces. With Royalty Builders, your kitchen becomes a centerpiece of style and connection.

Stylish Bathroom Additions in South San Francisco

Comfort, privacy, and beauty—all in one space. Adding a new bathroom isn’t just about practicality; it’s about enhancing your everyday routine. Whether it’s a spacious ensuite, a guest bath, or a main-level powder room, we design bathrooms that offer peace, elegance, and function.

Our bathroom additions feature frameless glass showers, soaking tubs, radiant heating, custom vanities, and sleek tilework—all installed with top-tier craftsmanship and attention to plumbing and ventilation. We make sure your new bathroom feels like it was always meant to be there—only better.

Sunroom Additions in South San Francisco

Bring the outdoors in—without the chill, wind, or fog. A sunroom addition in South San Francisco is the perfect solution for year-round brightness and warmth, even when the marine layer rolls in. Whether it’s a cozy morning room, an art studio, or a space to sip coffee and unwind, we build sunrooms that feel bright, open, and relaxing.

We use energy-efficient windows, insulated flooring, and structural materials that complement your home’s design. Every sunroom is tailored to your vision and lifestyle, offering a peaceful escape right in your own home.

Functional Room Additions in South San Francisco

As your needs grow, your home should keep up. Whether you’re creating a home office, a nursery, a guest suite, or a dedicated space for hobbies, we build room additions that make your home more livable—and more valuable.

Our designs ensure your new space blends naturally with your home’s floor plan, architecture, and finishes. We optimize for light, flow, comfort, and purpose—so your new room feels like it was always part of your original layout.

Second Story Additions in South San Francisco

When you’ve run out of room to expand outward, it’s time to build up. A second-story addition is the ultimate way to gain space while preserving your yard and footprint. Whether you’re adding bedrooms, bathrooms, or an upper-level retreat, Royalty Builders delivers second stories that look and feel like part of the original home.

We manage the structural engineering, architectural alignment, staircase design, and everything in between. Your new second level will not only expand your space—it will enhance your entire living experience.

Home Addition Costs in South San Francisco

Every home and project is unique, but here’s a general pricing guide to help you start planning:

✅ Interior Additions

• ✅ Room Additions: $300–$450 per sq. ft.

• ✅ Kitchen Expansions: $350–$500 per sq. ft.

• ✅ Bathroom Additions: $350–$600 per sq. ft.

• ✅ Garage Conversions: $250–$400 per sq. ft.

✅ Exterior Additions

• ✅ Second Story Additions: Starting at $400 per sq. ft.

• ✅ Sunrooms/Enclosed Patios: $300–$450 per sq. ft.

• ✅ ADUs (Attached/Detached): $400–$700 per sq. ft.

📌 Due to South San Francisco’s zoning rules, lot sizes, and hillside terrain in some areas, final pricing may vary based on scope and site conditions. We provide a detailed estimate during your consultation.

Why Choose Royalty Builders for Your South San Francisco Home Addition

✅ Local Expertise: We’re familiar with the city’s building codes, coastal conditions, and permitting processes.
✅ Design + Build: One expert team handles your project from start to finish—for total peace of mind.
✅ Tailored Solutions: We design every addition to complement your lifestyle and enhance your home.
✅ Transparent Communication: From design to deadlines, you’ll always know where things stand.
✅ Licensed & Insured: Our work is fully covered and backed by years of experience and satisfied clients.

Your Trusted Home Addition Contractor in South San Francisco

At Royalty Builders, we believe a home addition should be more than just extra space—it should improve how you live, feel, and connect. Whether you’re expanding for family, function, or future flexibility, our team will guide you through every step with care, expertise, and a commitment to excellence.

We’ve earned the trust of homeowners across South San Francisco through honest communication, exceptional design, and quality that lasts.

Frequently Asked Questions – Home Additions in South San Francisco

Do I need a permit for a home addition in South San Francisco?
Yes. Permits are required for most additions. We manage the full permitting process, including city submissions and approvals.

How long does the construction process take?
Most home additions take between 3–6 months, depending on complexity. We provide a detailed schedule with milestones before construction begins.

Can you match my home’s style?
Absolutely. Seamless integration is a priority—we match rooflines, windows, materials, and interior finishes to maintain architectural harmony.

Are there restrictions in certain neighborhoods or hillsides?
Yes, some areas have additional setback or height regulations. We assess this during planning and ensure full compliance with local codes.

Do you build ADUs or garage conversions?
Yes! We’re experienced with ADUs, in-law units, detached suites, and garage conversions that meet city and state requirements.

Ready to Expand Your South San Francisco Home?

Let’s create a space that fits your vision—and your life. Whether you’re planning a custom kitchen, a new level, or a functional room to grow into, Royalty Builders is ready to make it happen.

Contact Us Today

📞 Call us or 📩 fill out our online form to schedule your free, no-obligation consultation. Let’s build something extraordinary—together.