At GMJ Construction, being the No.1 Eichler Sunnyvale construction company with over 15 years of experience, we offer an array of construction and remodeling solutions throughout the Bay Area. Specializing in the meticulous remodeling of Eichler Homes, we blend modern techniques with traditional craftsmanship to enhance these architectural gems. Our diverse services span both residential and commercial projects, guaranteeing high-quality outcomes tailored to each client’s vision.

Trust GMJ Construction Inc. for skilled, reliable, and top-tier construction expertise that transforms spaces into aesthetically pleasing and functional environments. Choose us for unparalleled commitment and exceptional results in every project.

Why Eichler Homes Deserve Specialized Care

Eichler homes are design landmarks; adding on to one is more than a typical remodel. These mid‑century Modern houses feature elements like exposed post‑and‑beam frames, radiant concrete floors, and wall‑to‑wall glass that blur the line between indoors and out. Working on an addition means these details must be handled with respect. Our Eichler remodeling experts know exactly what makes an Eichler home special. We preserve the original charm and blend your new space seamlessly with the existing structure.

Sunnyvale’s Top Choice for Eichler Additions & Expansions

With over 15 years of experience in the Bay Area, GMJ Construction is the go‑to builder for Eichler home expansions in Sunnyvale. We offer full‑service design and construction, combining modern building techniques with the timeless craftsmanship that defines Eichler architecture. Our diverse services cover everything from room additions to kitchen and bathroom remodels, ensuring high-quality results tailored to your vision. Explore our portfolio of projects to see how we transform Eichler homes while honoring their mid‑century roots.

• On-Time Completion: We stay on schedule so your new living space is finished efficiently.

• In-House Designer: Our design team customizes every detail of your Eichler addition from A–Z.

• Free Consultation: Get expert guidance at no obligation—contact us to start planning your project.

Ready to expand your Eichler? Contact us or call (408) 780-0479 for a free consultation.

Eichler Additions Tailored to Your Vision

In Sunnyvale, our custom Eichler additions are designed to honor mid‑century modern roots. Eichler homes (built 1950s–1970s) have signature features like post‑and‑beam construction, low flat roofs, and floor‑to‑ceiling glass walls that connect the indoors with the outdoors. Our experts preserve these hallmarks while expanding your living space—whether adding a new wing or enlarging an existing room—so the addition blends naturally with the original design. We handle everything from concept to completion, coordinating permits and construction. Every project begins with detailed planning and design to capture the open, light‑filled feeling Eichlers are famous for.

• Open Floor Plans & Glass Walls: We maintain the iconic airy layout and extensive glass that Eichler homeowners love.

• Natural Materials: We use authentic finishes like vertical‑grain redwood siding and exposed beams so new spaces match the original aesthetic.

• Specialist Expertise: Working with Eichler structures requires skill. Our team knows post‑and‑beam framing and radiant‑floor systems inside and out, ensuring any change complements the home’s original engineering.

Custom Room Additions & ADUs

When you need more space, GMJ offers custom room addition and ADU services to maximize your Eichler home’s potential. A well-designed addition can add bedrooms, expand a kitchen or living area, or create a new master suite—all while respecting the home’s classic architecture. Likewise, an Accessory Dwelling Unit (ADU) provides a self-contained guest suite or rental unit that increases income and property value. California’s ADU laws make these conversions smart, family-friendly upgrades.

• Detached Backyard Cottages: Build a separate cottage in your yard (up to ~800–1200 sq ft) for guests or rentals.

• Attached Additions: Expand the home’s footprint seamlessly, adding space without breaking the original exterior lines.

• Garage Conversions: Transform an existing garage into a modern living suite (see our garage-to-ADU conversion guide).

We integrate Eichler elements—clerestory windows, natural woods, clean lines—into every addition and ADU, so the result feels like part of the original mid-century design.

Comprehensive Planning & Design Process

From initial concept to final walkthrough, GMJ Construction makes complex Eichler additions simple. Our full-service approach covers every step, so you can relax while we handle the details:

• Design Consultation: We collaborate with you on custom layouts that preserve Eichler charm. Our in-house planners create visuals and 3D plans aligned with your goals and budget.

• Permitting & Approvals: We prepare and submit all plans for Sunnyvale permits (including streamlined California ADU regulations), navigating local requirements on your behalf.

• Construction & Finishing: Our certified team builds your addition to Eichler standards using high-quality materials. We coordinate all trades—framing, roofing, siding, electrical, HVAC—and manage the project schedule.

This streamlined process avoids delays and hidden costs. We keep you informed at every step (see our FAQs for common questions) and even work with Eichler-minded architects and craftsmen to ensure authenticity.

Why Choose GMJ Construction

GMJ Construction is one of the Bay Area’s most trusted Eichler specialists. We’re licensed (#996536), insured, and passionate about preserving mid-century homes. When you work with us, you get:

• Eichler Expertise: As Eichler home specialists, we preserve original design details while modernizing functionality.

• Local Focus: We know Sunnyvale and the surrounding Bay Area—its Eichler heritage, regulations, and community aesthetics.

• Transparent Process: Flat-fee bids and clear contracts protect your budget. (See our Terms of Service and Privacy Policy.)

• Quality Guarantee: We use top-grade materials for siding, roofing, and finishes. Ask about our siding installation and painting services.

• Happy Clients: Browse our projects page to see successful Eichler additions, and read testimonials from satisfied homeowners.

Learn More & FAQs

Looking for guidance? Check out our expert resources for Eichler homeowners:

• Renovating an Eichler Home – Tips on modernizing while preserving character.

• Eichler Remodeling Mistakes to Avoid – How to ensure your project succeeds.

• Garage-to-ADU Conversion Guide – Learn how a garage can become a valuable living unit.

• FAQs – Answers to common questions about permits, timelines, and more.

Whether expanding your living room or adding a backyard cottage, GMJ Construction delivers custom Eichler additions and ADUs that respect the home’s heritage and modern needs. Ready to get started? Contact us today for a free consultation on your Eichler home expansion in Sunnyvale!