Eunoia Builders Inc.
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    • Home
    • Portfolio
    • Our Story
    • Get in Touch
    • Service Areas
      • Sunnyvale CA
      • Palo Alto, CA
      • Los Gatos CA
      • Los Altos CA
      • Cupertino CA
Eunoia Builders Inc.
  • Home
  • Portfolio
  • Our Story
  • Get in Touch
  • Service Areas
    • Sunnyvale CA
    • Palo Alto, CA
    • Los Gatos CA
    • Los Altos CA
    • Cupertino CA

Sunnyvale’s Trusted Home Addition Contractors

Whether your family is growing, you're craving more space, or you simply want to increase your property’s value, our additional construction services in Sunnyvale, CA offer a seamless way to expand your living space without the stress of moving. From single-room extensions to full second-story additions, we deliver results that feel like they’ve always been part of your home.

With a strong reputation for quality craftsmanship, transparent communication, and clean, code-compliant builds, we’ve helped homeowners across Sunnyvale transform the way they live—right where they are.

Build the Space You’ve Been Missing

We understand that every homeowner’s needs are unique. That’s why our Sunnyvale addition services are fully customized to match your vision, budget, and lifestyle.

Room Additions

Garage Conversions

Garage Conversions

Whether it’s an extra bedroom for a new baby, a home office to support remote work, or a sunroom to take advantage of California’s natural light, our team specializes in room additions that integrate seamlessly with your existing home layout. We carefully match finishes, flooring, and architecture so it never feels like an afterthought.

Garage Conversions

Garage Conversions

Garage Conversions

Sunnyvale real estate is valuable—so why let your garage go unused? Converting a garage into livable space is one of the most cost-effective ways to add square footage to your property. We handle everything from insulation and drywall to plumbing and electrical—ideal for rental units, guest suites, or hobby rooms.

Second Story Additions

Second Story Additions

Second Story Additions

If you're limited by lot size but need more room, building up instead of out can be a smart solution. We engineer and construct second-story additions with care, ensuring your home's structural integrity while creating full upstairs living quarters or additional bedrooms.

ADU & In-Law Suites

Second Story Additions

Second Story Additions

With increasing housing demands in Sunnyvale, Accessory Dwelling Units (ADUs) and in-law suites are popular solutions for multigenerational families or rental income. We handle permitting, design, and construction—delivering fully self-contained living spaces that meet all California codes.

Our Design & Build Process

We believe a smooth addition project starts with a thoughtful process. Here’s how we work with homeowners in Sunnyvale:


Consultation & Planning

We start with a free, on-site consultation to understand your goals and evaluate your space. From there, we develop a tailored proposal that aligns with your budget and priorities.


Architectural Design

Our in-house designers and draftsmen create blueprints that reflect your vision while remaining compliant with Sunnyvale zoning laws and building codes.


Permitting & Engineering

We take the stress out of approvals. Our team handles all city permitting, structural engineering, and Title 24 energy compliance so there are no surprises.


Construction & Project Management

With clear timelines, dedicated project managers, and minimal disruption to your home life, we maintain a clean worksite and consistent progress from demo to finish.


Final Walkthrough & Warranty

Once your addition is complete, we walk you through every detail, address punch list items, and stand behind our craftsmanship with a labor warranty.

Why Homeowners in Sunnyvale Choose Us

Sunnyvale isn’t just where we work—it’s our community. We understand local styles, permit requirements, and what adds real value to homes here. When you work with our team, you’re getting:

  • Fully licensed and insured contractors


  • Decades of local addition experience
  • Transparent pricing—no hidden costs
  • Expert handling of structural modifications
  • Clean, professional crews who respect your space

We don’t just build additions. We build trust.

Let’s Start Expanding Your Home Today

Whether you're looking to add a second story in the Cherry Chase neighborhood or convert a garage near Murphy Avenue, our addition construction experts are ready to help you take the next step.


Reach out today for a consultation, and let’s turn your Sunnyvale home addition vision into a reality.

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