Home Addition Design-Build Remodeler in San Jose

More Space. Less Stress.

Your home should evolve with your life. Whether you’re welcoming a growing family, creating space to work from home, or planning for the years ahead, a thoughtfully designed home addition can give you the room you need without leaving the neighborhood you love.

If you’re searching for a general contractor for a home addition, you may be surprised to learn that there’s an even better approach.

At Gridley Company, we’re a design-build remodeling firm that brings design, planning, permitting, construction, and project management together under one roof. Instead of coordinating multiple companies, you’ll work with one experienced team dedicated to guiding you and making your project as seamless as possible.

Contact us today!

View our recent home additions.

Experience You Can Feel Confident About

Adding onto your home is one of the most complex remodeling projects you can undertake. It requires careful planning, clear communication, and skilled craftsmanship from start to finish. For more than 30 years, homeowners throughout San Jose have trusted Gridley Company with some of their biggest investments.

That trust has been earned one project at a time through exceptional craftsmanship, transparent communication, and a our process designed to make remodeling less stressful.

Our work has been recognized with industry honors including 2025 NARI Meta Winner, 2024 NARI Meta Winner, 2024 NARI RotY winner, Best of Houzz Winner, and recognition among Qualified Remodeler’s Top 500 remodeling companies. But what matters most to us isn’t the awards themselves. It’s knowing our clients feel confident recommending us to their family, friends, and neighbors.

When you choose Gridley, you can expect:

• An experienced, collaborative design-build team
• Award-winning craftsmanship
• Dedicated project management
• Clear communication from start to finish
• High-quality materials and trusted trade professionals
• Beautiful spaces designed to improve everyday living
• A two-year workmanship warranty for added peace of mind

A Room Addition Designed Around Your Life

No two families use their homes the same way. That’s why every addition we design begins by understanding how you live today and how you want your home to support you in the future.

We design and build:

• Primary suite additions
• Family room expansions
• Kitchen additions
• Home offices
• Guest suites and multi-generational spaces
• ADUs
• Garages
• Attic Conversions
• Ranch home additions

Looking for a General Contractor?

Many homeowners begin their search looking for a general contractor. While a traditional contractor manages construction, you’ll often need to hire separate professionals for design, plans, and permitting.

With Gridley’s design-build approach, it’s all handled by one team.

Traditional General Contractor

• Designers hired separately
• Multiple companies coordinating the project
• Several points of contact
• Greater opportunity for miscommunication

Gridley Design-Build

• In-house design team ready to guide you
• Coordinated project management
• Design, planning, permits, and construction together
• One experienced team guiding you from beginning to end
• Clear communication throughout the project

When everyone is working toward the same goal from day one, the entire remodeling experience becomes more predictable, more efficient, and less stressful.