Luxury Addition & ADU Services In Berkeley, CA
Specializing In Addition/ADU Construction & Renovations
Your Berkeley, CA Addition & ADU Expert
3G Builders & Renovation
Space has a way of running out right when you need it most. Growing families, remote work, aging parents, long-term guests life shifts, and your home should be able to shift with it. Room additions and ADUs give Berkeley homeowners a smarter path forward, creating purpose-built spaces that blend naturally into the existing home without the disruption of moving.
Every addition project in Berkeley carries its own set of challenges zoning considerations, structural decisions, permit coordination, and construction details that all need to come together in the right order. 3G Builders & Renovation takes ownership of that complexity, walking homeowners through each decision with honest guidance and making sure the build stays on track from groundbreaking to final inspection.
At 3G Builders & Renovation, we deliver additions and ADUs across Berkeley, CA that expand what your home can do thoughtfully designed, carefully built, and made to last.
Our Addition & ADU Services
Serving Berkeley, CA & Surrounding Areas
Home Additions
3G Builders & Renovation
Adding onto your home in Berkeley is about more than increasing square footage. It is about creating space that enhances how you live every day. Whether you are envisioning a larger living area, an additional bedroom, or a new family gathering space, a well-designed addition can completely change how your home functions. We approach every addition with intention, ensuring the new space flows naturally with your existing layout and feels cohesive from both a structural and design standpoint. From the foundation through the final finishes, every detail is handled with care so the finished space feels like it has always belonged in your Berkeley home.
Accessory Dwelling Units (ADU)
3G Builders & Renovation
An ADU offers flexibility, independence, and long-term value for your Berkeley property. Whether used as a guest suite, in-law unit, or private living space, a thoughtfully designed ADU balances comfort, privacy, and efficiency. We focus on smart layouts, seamless transitions, and designs that complement the main home while standing confidently on their own. From planning through construction, each ADU is built to feel purposeful, functional, and fully integrated into your Berkeley property.
Second Story & Vertical Expansions
3G Builders & Renovation
Building upward allows Berkeley homeowners to gain valuable living space without expanding their home’s footprint. Second-story additions require careful planning, structural expertise, and thoughtful design to ensure stability, balance, and comfort. We take a detailed approach to creating upper-level spaces that connect naturally with the rest of the home, both visually and functionally. The result is an expansion that feels intentional, well supported, and designed for everyday living in Berkeley, CA.
Bump-Outs & Room Additions
3G Builders & Renovation
Bump-outs and room additions are a smart way for Berkeley homeowners to gain meaningful space without dramatically changing their home’s footprint. Whether you need a little more breathing room in a kitchen, want to expand a bedroom or bathroom, or are adding an entirely new room, these projects are designed to improve comfort and usability where it matters most. We focus on thoughtful design, structural integrity, and seamless integration so the new space blends naturally with the rest of your Berkeley home. The result is a purposeful expansion that feels intentional, balanced, and built to support the way you live every day.
Garage Conversions
3G Builders & Renovation
Garage conversions are a practical and efficient way to create a fully functional ADU in Berkeley without expanding your home’s footprint. By transforming an underused garage into a private living space, you can add a guest suite, in-law unit, or rental ADU that feels comfortable and complete. We focus on smart layouts, proper insulation, natural light, and seamless integration so the converted space meets code, functions independently, and still feels connected to the rest of the property. The result is a well-designed ADU that adds flexibility, long-term value, and meaningful living space to your Berkeley home.
Built for Comfort, Made for You
Our Addition & ADU Specialties
Premier Design/Build Remodeling in Berkeley, & Surrounding Communities
Architectural Harmony
Ensuring new additions and ADUs complement your Berkeley home’s existing architecture for a cohesive look inside and out.
Functional Space Optimization
Designing layouts that prioritize flow, usability, and long-term flexibility for everyday living in Berkeley households.
Structural Reinforcement & Upgrades
Handling framing, foundations, and load-bearing adjustments required to safely support new construction on Berkeley properties.
Custom Interior Detailing
Delivering tailored finishes such as flooring, millwork, cabinetry, and built-ins that align seamlessly with the rest of your Berkeley home.
Energy-Conscious Building Practices
Incorporating efficient materials and systems to improve comfort, performance, and sustainability for homes in Berkeley, CA.
Improved Functionality
Enhanced Aesthetics
Increased Property Value
Ehanced Comfort & Relaxation
Improved Energy Efficiency
Our Process
The Process That Sets Us Apart
At 3G Builders and Renovation, we guide you through every step of your home remodeling project, actively listening to your needs and working with you to stay within your budget. Our goal is to exceed your expectations and create a distinct space that reflects who you are, all while staying within your budget. We prize clear communication and transparency, ensuring we’re always available to answer your questions.
With us by your side, you’ll always know what to expect along this exciting journey, from the first consultation to putting on the final touches. Together, we’ll transform your vision into a reality, crafting the dream home you’ve always wanted.
Addition & ADU Inspiration Gallery
From Plans to Perfected Spaces
Step into the possibilities of what your Berkeley home can become with 3G Builders & Renovation. Our gallery highlights real additions and ADUs designed to create more space, more comfort, and more flexibility for everyday living. From seamless home additions and second-story expansions to thoughtfully designed ADUs and garage conversions, each project begins with your ideas and is shaped around how you want to live. What you’ll see is a hands-on, client-first process where communication is clear, craftsmanship is never rushed, and every detail matters. We believe added space should feel natural, purposeful, and built to last. Take a look through our work and imagine what we can create together in Berkeley, CA.
Real People, Real Opinions
See What Our Customers Are Saying
Built for Comfort, Made for You
Get Started Today
Bringing Your Best Space to Life
Frequently Asked Questions
Your Questions - Answered
Can I convert an existing structure on my Berkeley property into an ADU?
Yes, converting an existing structure into an ADU in Berkeley can be an exciting and practical solution for making better use of your property. However, it does require careful consideration of local building codes and regulations.
At the start of the project, our team works closely with you to review the existing structure, considering factors such as zoning laws, property setbacks, building safety standards, and accessibility requirements specific to Berkeley, CA. Understanding these elements is essential to ensure the conversion aligns with your vision and complies with all local requirements.
Is building an ADU or addition a good investment in Berkeley, CA?
Building an ADU or addition in Berkeley is a valuable investment, both financially and functionally. Here’s why:
Increased Property Value: Adding an ADU or addition can significantly increase the overall value of your Berkeley home, making it more attractive to future buyers.
Potential Rental Income: With California’s strong housing demand, an ADU in Berkeley can provide a consistent source of rental income.
Flexible Use: ADUs offer adaptable living solutions, from home offices and guest suites to housing for aging family members.
Long-Term Living Solutions: ADUs allow Berkeley homeowners to keep family close while maintaining privacy and independence.
Positive Return on Investment: While the upfront cost can be substantial, the long-term value and income potential often outweigh the initial investment.
Will you pull all the permits for my ADU or addition in Berkeley?
Yes. Our team handles all aspects of the permitting process for ADU and addition projects in Berkeley, CA. This includes researching local requirements, preparing documentation, submitting permits, and coordinating with local authorities. We ensure your project meets all Berkeley building codes and regulations, making the process smooth and stress-free.
Can you help with the overall design of my ADU or addition?
Absolutely. Our design team works closely with Berkeley homeowners to bring their ADU or addition vision to life. Whether you have a clear plan or need guidance, we collaborate with you to create a space that is functional, comfortable, and aligned with your personal style—while enhancing your Berkeley property.
Committed To Fulfilling Your Vision
We Understand The Value Of Your Home & Appreciate Your Trust In Us
Customized Design Within Your Budget
Your remodel should feel custom without feeling out of reach. You get thoughtful design options and smart recommendations that align with your goals while staying within your budget.
Professional Service You Can Trust
You deserve a team that respects your home, your time, and your investment. You can expect dependable workmanship, honest guidance, and a process that feels organized from start to finish.
Quality Work Completed On Time
Your project is completed with careful attention to detail and a high standard of craftsmanship. You get a realistic timeline and a team that works efficiently to keep your renovation moving forward.
Clear Communication You Can Count On
You should always know what’s happening with your project. You receive consistent updates, quick answers, and clear next steps so the entire process feels simple and stress-free.
Clean, Respectful Jobsite
Your home is treated with care throughout the entire renovation. We maintain a clean workspace, protect surrounding areas, and minimize disruption so your project feels comfortable from day one.
Detail-Driven Craftsmanship
The difference is in the details, and you will see it in the finished result. Every phase of your remodel is completed with precision, consistency, and a focus on long-term durability.
Built for Your Lifestyle
Your space should work better for the way you live every day. We design around your routines, preferences, and priorities so your renovation feels functional, comfortable, and truly yours.
Crafted Spaces, Lasting Value
Proudly Serving Berkeley, CA
3G Builders & Renovation
3G Builders and Renovation proudly serves homeowners throughout Walnut Creek, Pleasant Hill, Alamo, and the surrounding areas of California with trusted design-build expertise and high-quality remodeling. Whether you’re transforming your kitchen, updating your bathroom, finishing your garage or basement, or building a custom ADU, you can expect thoughtful planning, skilled craftsmanship, and a process built around your goals.
- Alamo
- Albany
- Berkeley
- Brentwood
- Clayton
- Concord
- Danville
- El Cerrito
- Lafayette
- Martinez
- Moraga
- Oakland
- Orinda
- Pleasant Hill
- Pittsburg
- San Ramon
- Walnut Creek
Addition & ADU Pricing
Design Your Ideal Addition or ADU
Garage Conversion ADU
Starting At:
- Basic ADU In Your Garage
- Studio Bedroom Addition/Conversion
- Kitchenette
- Bathroom
- Windows
- Doors
- Painting
Completed In 8-9 Weeks
600-800 sqft ADU
Starting At:
- 1 Bedroom
- 1 Bathroom
- Living Room
- Full Kitchen
- Patio
- Fixtures
- Painting
Completed In 16-20 Weeks
1200 sqft ADU
Starting At:
- 2 Bedrooms
- 2 Bathrooms
- Living Room
- Full Kitchen
- Patio
- Fixtures
- Painting
Completed In 25+ Weeks
*Prices are averages and may vary depending on the size of your project and the materials used. You will get an exact quote for your unique project after the on-site consultation.