ABOUT 9BUILDERS

Crafting Excellence, One Project at a Time

Family-owned construction company based in San Jose, California — transforming homes across the Bay Area since 2004.

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Who We Are

9Builders is a family-owned construction company founded by Hoang Nguyen, based in San Jose, California. With over 20 years of hands-on experience, we specialize in kitchen and bathroom remodeling, custom home construction, ADU building, and commercial renovations.

Who We Are

Family-Owned & Operated

Founded on trust, hard work, and a commitment to treating every project like our own home.

20+ Years Experience

Two decades of construction expertise across residential, commercial, and ADU projects in the Bay Area.

Licensed & Insured

Fully licensed, bonded, and insured — giving you complete peace of mind on every project.

Bay Area Specialists

Deep knowledge of local building codes, permit processes, and neighborhood standards across 15+ cities.

All Services Under One Roof

From design and planning through construction and final walkthrough, 9Builders handles every phase of your project. One team, one point of contact, zero hassle.

What We Offer

Complete construction services for every stage of your project.

01

Design & Permitting

Custom architectural plans tailored to your style and property. We navigate local regulations, secure permits, and ensure full compliance.

02

Construction & Management

Skilled builders bring your design to life using durable, high-quality materials. Project managers oversee timelines, budgets, and schedules.

03

Finishing & Support

Comprehensive interior finishes — painting, flooring, cabinetry, fixtures. Plus landscaping, exterior work, and post-construction support.

Our Foundational Values

Our core values guide every project — ensuring exceptional results and a positive experience for every client.

Quality Craftsmanship

The highest-quality materials and skilled techniques to deliver durable, beautiful results on every project.

Client-Centered Approach

Your satisfaction is our priority. We listen closely and maintain open communication to bring your vision to life.

Integrity & Transparency

Honest, straightforward service — keeping you informed at every step with realistic timelines and budgets.

Innovation & Sustainability

Modern solutions and environmentally responsible practices with sustainable materials and energy-efficient options.

Our Foundational Values

What Sets Us Apart

We've built a reputation for excellence across the Bay Area.

01

Unrivaled Expertise

Our skilled professionals possess unmatched expertise in ADU construction, remodeling, and custom home building.

02

Personalized Solutions

Every customer is unique. We tailor solutions to meet your specific needs with customized options.

03

Timely Delivery

We value your time and guarantee prompt completion, enabling you to enjoy your new space sooner.

Our Services

From backyard ADUs to whole-home renovations — we do it all.

ADU Construction

ADU Construction

Detached units, garage conversions, and two-story builds across the Bay Area.

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Home Remodeling

Home Remodeling

Kitchen, bathroom, and whole-home renovations that transform your living space.

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Custom Homes

Custom Homes

Ground-up custom home construction tailored to your lot and lifestyle.

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Kitchen Remodeling

Kitchen Remodeling

Premium cabinetry, countertops, and modern layouts for the heart of your home.

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Bathroom Remodeling

Bathroom Remodeling

Spa-quality bathrooms with luxury fixtures, tile work, and smart design.

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Home Additions

Home Additions

Room additions, second stories, and expansions for growing families.

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Frequently Asked Questions

Find answers to commonly asked questions about our services.

We primarily serve the San Jose and greater Bay Area, including Santa Clara, Sunnyvale, Campbell, Los Gatos, Saratoga, Cupertino, Mountain View, Palo Alto, Fremont, Los Altos, Milpitas, and surrounding communities.

ADU costs in California typically range from $150,000 to $350,000 depending on size, design complexity, site conditions, and finishes. We provide a detailed estimate during your free consultation so there are no surprises.

Yes, most remodeling and all ADU projects require permits from your local building department. 9Builders handles the entire permitting process for you, including plan submissions, inspections, and approvals.

A kitchen or bathroom remodel usually takes 4 to 8 weeks. A full home remodel can take 3 to 6 months. ADU construction typically runs 6 to 12 months from design through completion. We provide a detailed timeline at the start of every project.

Yes. We offer a free, no-obligation consultation where we visit your property, discuss your goals, review permits and zoning requirements, and provide a preliminary scope of work and cost estimate.

Absolutely. We offer full design-build services, working with licensed architects and engineers in-house so your project flows seamlessly from initial concept through final walkthrough.

Our advisory service includes a property evaluation, permit and zoning guidance, a detailed scope of work, cost estimation tools, and professional recommendations so you can confidently evaluate bids from any contractor.

Yes. 9Builders is fully licensed, bonded, and insured. We also back our work with a warranty so you can have complete peace of mind after your project is finished.

We can guide you through common financing options for ADUs and remodels, including home equity loans, HELOCs, construction loans, and California-specific ADU financing programs. We partner with trusted lenders who specialize in home improvement projects.

Getting started is simple. Contact us through our website or call us at 408-647-6476 to schedule your free consultation. We will visit your property, discuss your vision, and outline the next steps.

Some videos showcasing our recent work.

What Our Customers Say

Our clients are at the heart of everything we do at 9Builders, and their feedback reflects our dedication to quality and service. From beautiful remodels to innovative new builds, hear how we've transformed their spaces and exceeded their expectations.

★★★★★

Tommy, Yuna, and their entire team were amazing from start to finish. We hired them for a big project that included foundation work, a structural retrofit, replacing the PGE main service line, and installing a new 200-amp panel. It was a pretty major job, and honestly, we couldn't have asked for a better crew to handle it. Everyone was professional, polite, and knew exactly what they were doing. They showed up on time, cleaned up every day, and were super respectful of our space.

Eliza R.
Eliza R. (Source: Yelp)
★★★★★

I hired 9Builders to work on my backyard and they did an amazing job. They built a nice structure that looks really great and added so much to my yard. The team was friendly and kept everything clean while they worked. The work was done quick and looked really good. Now they're working on the front of my house to add an extension, and I'm impressed how fast they worked. They finished the foundation in just two days...

Linda Trang T.
Linda Trang T. (Source: Yelp)
★★★★★

9Builders transformed our kitchen into a beautiful, functional space. They listened to our ideas, offered great suggestions, and delivered high-quality work. The team was professional and respectful throughout.

Lorenzo Galderma
Lorenzo Galderma (Source: Google)

Ready to Start Your Project?

Contact us today for a free consultation and estimate.

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