Home Additions Atherton – Where Elegance, Space, and Custom Design Come Together

When you live in Atherton, your home should reflect your lifestyle—now and in the future. Whether you’re expanding your kitchen for entertaining, adding a luxurious bathroom, or building an entire second story, Royalty Builders delivers bespoke home additions designed with sophistication, precision, and lasting value.

We handle every detail in-house, from custom design to permits and construction, creating seamless additions that elevate your living experience and honor the architectural character of your home.

Custom Kitchen Additions in Atherton

A kitchen addition is more than extra space—it’s a lifestyle upgrade. In Atherton, where design and luxury go hand in hand, we craft kitchens that merge beauty with performance. Whether you want a gourmet chef’s kitchen, a modern entertaining space, or an open-concept layout that flows effortlessly into your living area, we create kitchens that feel inviting, high-functioning, and beautifully tailored to you.

We integrate custom cabinetry, oversized islands, premium appliances, and thoughtfully planned lighting to ensure your new kitchen is as elegant as it is efficient. Our kitchen additions are designed to become the heart of your home—where form and function meet seamlessly.

Stylish Bathroom Additions in Atherton

A luxurious bathroom transforms everyday routines into relaxing rituals. Whether you’re adding a spa-worthy ensuite, a guest bath, or a sleek powder room, we design bathrooms that combine tranquility with modern convenience.

Expect refined materials, elevated finishes, and details like heated floors, rain showers, freestanding tubs, and custom vanities. We tailor every bathroom addition to blend with your existing home while creating a private retreat that reflects your personal style. In Atherton, where comfort and elegance are expected, we deliver nothing less.

Sunroom Additions in Atherton

Bring the outdoors in with a bright, elegant sunroom addition. Perfect for Atherton’s lush surroundings, a custom sunroom offers a peaceful space to relax, host, or enjoy natural light—regardless of the season.

Our sunrooms are built with energy-efficient glass, custom millwork, and climate-conscious insulation to keep you comfortable year-round. Whether you use it as a reading lounge, indoor garden, or creative retreat, your sunroom will feel like a graceful extension of your home—connected to nature and thoughtfully designed.

Functional Room Additions in Atherton

As your lifestyle evolves, so should your living space. Whether you need a quiet home office, a guest suite, a children’s playroom, or a wellness studio, we create functional room additions that enhance both daily living and long-term value.

Every space is custom-designed for optimal flow, comfort, and visual harmony. Our team ensures that your new room fits seamlessly within your home’s architecture, finishes, and layout—so it feels like it’s always been there, only better.

Second Story Additions in Atherton

When space is limited but your vision is big, building up is the solution. A second-story addition can dramatically expand your square footage—without changing your home’s footprint or landscape.

In Atherton, where estate-scale homes are the norm, second-story additions offer an opportunity to create spacious primary suites, additional bedrooms, or even an upper-level lounge or library. We manage the entire process—from architectural design and engineering to zoning compliance and fine interior detailing—delivering a second floor that feels both intentional and impeccable.

Home Addition Costs in Atherton

Every home addition is unique, and in a luxury market like Atherton, pricing can vary based on size, complexity, finish level, and structural considerations. Here’s a general 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 Atherton’s estate zoning, premium building materials, and architectural standards, final pricing may vary depending on scope, design goals, and site-specific factors. We provide clear, customized estimates during your consultation.

Why Choose Royalty Builders for Your Atherton Home Addition

✅ Atherton-Specific Expertise: We understand the building codes, permitting processes, and high-end expectations unique to Atherton.
✅ Design + Build Approach: From the first sketches to final construction, our in-house team handles every phase of your project.
✅ Tailored Craftsmanship: We customize every addition to fit your home’s architecture and your lifestyle needs—perfectly.
✅ Transparent Communication: You’ll always know where your project stands, with no surprises.
✅ Licensed & Insured: Our experienced team is fully credentialed and committed to delivering premium results with integrity.

Your Trusted Home Addition Contractor in Atherton

At Royalty Builders, we believe your home should evolve with you—gracefully, beautifully, and functionally. Whether you’re expanding a kitchen, adding a luxurious bath, or building an entirely new floor, our team delivers thoughtful design, expert construction, and unmatched attention to detail.

Atherton homeowners trust us because we blend timeless design with modern comfort—on time and on budget. Let’s build something exceptional together.

Frequently Asked Questions – Home Additions in Athertom

Do I need a permit for a home addition in Atherton?
Yes. All additions require permits through the Town of Atherton, which has strict architectural review and zoning standards. We handle the entire process for you.

How long will my home addition take?
Depending on the project’s size and complexity, timelines typically range from 3 to 6+ months. We’ll provide a customized timeline during your consultation.

Can you match the original design of my home?
Absolutely. Seamless integration is our specialty. We match materials, finishes, and structural elements to preserve the elegance and integrity of your home.

Are there zoning restrictions in Atherton?
Yes. Atherton enforces specific rules related to setbacks, building height, floor area ratio (FAR), and architectural review. We navigate all of these for you.

Do you build luxury ADUs or detached suites?
Yes. We specialize in custom ADUs, guest cottages, and private wellness studios—perfect for Atherton estates looking to maximize functionality and privacy.

Ready to Expand Your Atherton Home?

Let’s turn your vision into a reality. Whether you’re planning a kitchen expansion, second story, or elegant suite, Royalty Builders is here to deliver the expertise, care, and craftsmanship your project deserves.

Contact Us Today

📞 Call us or 📩 fill out our online form to schedule your free, no-obligation consultation. We’ll walk your property, understand your goals, and craft a custom plan that fits your vision—perfectly.

Let’s build something extraordinary—together.

Our Additional Services - Royalty Builders

ADU & Garage Conversion
New Home Construction
Complete Home Remodeling
Room Addition
Kitchen Remodeling
Bathroom Remodeling

Our Latest Reviews

Victoria H., Atherton
Victoria H., Atherton
"Royalty Builders brought true craftsmanship to our Atherton home addition. We added a luxury guest wing with a full bath and lounge area, and the attention to detail was exceptional. The team was discreet, professional, and respectful of our property throughout the project. Highly recommended for high-end builds."
Michael B., Atherton
Michael B., Atherton
"We had a very specific vision for our home expansion, and Royalty Builders executed it flawlessly. The new home office and gym they built exceeded our expectations in both design and quality. They handled all aspects, from permits to final finishes, with efficiency and care."
Danielle S., Atherton
Danielle S., Atherton
"Working with Royalty Builders on our home addition was a five-star experience. Their team was professional, detail-oriented, and communicative throughout. The new master suite and walk-in closet they built fit seamlessly with the architecture of our home. The result is both elegant and functional."

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