Expert Deck Construction in Mill Valley, CA

The Sidex team has the craftsmanship that matches Mill Valley’s charm. From hillside decks to poolside escapes, we build outdoor spaces made to last beautifully.

4.9/5 rating from 56+ online reviews.

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A Deck That Belongs in Mill Valley

Life in Mill Valley is all about balance. We see redwoods, mountain air, and timeless architecture. Your deck should fit right into that rhythm. At Sidex, we build decks that complement your home’s natural surroundings and stand strong through Marin County’s changing seasons. Whether it’s a new deck installation in Mill Valley, CA, or restoring a sun-weathered structure, our team brings precision, design sense, and a whole lot of local know-how to every job.

Our Deck Services in Mill Valley

Deck Restoration

We restore the cracks, fading, and structural wear with expert care. We replace damaged boards, refinish surfaces, and strengthen framing so your deck feels brand new again. Think of it as breathing life back into your favorite spot to unwind.

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Deck Repair

From loose railings to water damage, no issue is too small (or too late) to fix. We specialize in deck repair for Mill Valley homes, addressing not just surface problems but the hidden structural issues that can compromise safety and appearance.

learn more about our Deck Repair

SB-721 Deck Repair

Are you a multi-unit property owner? We’ve got you covered too. Our certified team provides full SB-721 compliance inspections and repairs, ensuring every balcony and deck meets California’s strict safety standards. Reliable, timely, and code-accurate work that keeps your property protected.

learn more about our SB-721 Deck Repair

Quality Materials, Built for Mill Valley Living

Composite

Low-maintenance and weather-resistant, composite decks are perfect for Mill Valley’s mix of sun and shade.

Composite Decking

Redwood

The classic choice for homeowners who want that organic Mill Valley warmth beneath their feet.

Redwood Decking

PVC

A sleek, waterproof solution for your pool deck installation in Mill Valley. PVC decking stays cool underfoot and repels moisture.

PVC Decking

Cedar

Cedar Decking offers a beautiful, natural wood aesthetic that provides a classic look and a pleasant aroma.

Cedar Decking

IPE

IPE's deep color and durability make it perfect for hillside homes and design-forward renovations.

IPE Decking

Our Work Speaks for Itself

Take a look at the decks, balconies, and outdoor spaces we’ve built across Marin County. Each project showcases Sidex’s precision craftsmanship, attention to detail, and harmony with Mill Valley’s and the Bay Area’s unique architecture and terrain.

See Our Projects

      EXCELLENT  
   Based on 38 reviews 
    
 
 
 
   
 
 
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   Tatyana P 
 
 
 
 Trustindex verifies that the original source of the review is Google. 
  
 
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   Vivi Babenko 
 
 
 
 Trustindex verifies that the original source of the review is Google. My grandparents backyard deck had taken a beating over the years, especially from all the snow and rough weather. It was definitely time for some love, and Sidex really came through for! What stood out most was the crew and how they treated my grandparents like family and were genuinely so kind throughout the whole project. Really glad we chose them!
  
 
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   Sara Yarmolyuk 
 
 
 
 Trustindex verifies that the original source of the review is Google. Extremely helpful employees and truly have honest work and craftsmanship.
  
 
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   Valya Stepanov 
 
 
 
 Trustindex verifies that the original source of the review is Google. I can’t say enough good things about Sidex Siding & Decking! From the first phone call to the final walkthrough, the entire experience was outstanding. The team was professional, punctual, and incredibly knowledgeable. They took the time to answer all of my questions, communicated clearly throughout the project, and paid close attention to every detail. The quality of their workmanship exceeded my expectations, and the finished deck looks absolutely amazing. They treated my home with respect, kept the work area clean, and completed everything on schedule. It’s rare to find a company that truly delivers on its promises, but Sidex Siding & Decking did exactly that. If you’re looking for a trustworthy, skilled, and reliable contractor, I highly recommend them. I couldn’t be happier with the results and will definitely use them again for future projects. Five stars all the way!
  
 
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   Max Gatsmanyuk 
 
 
 
 Trustindex verifies that the original source of the review is Google. Fast and professional
  
 
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   Vince Carterson 
 
 
 
 Trustindex verifies that the original source of the review is Google. Andrey and Nate were very helpful, would work with Sidex again. I am glad everything went as smooth as they said it would.
  
 
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   Sava Vashchuk 
 
 
 
 Trustindex verifies that the original source of the review is Google. We recently hired SIDEX to completely replace the old, worn-out siding on our home and we could not be happier with the results. They gave us a highly competitive and transparent quote with no hidden fees.
  
 
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   Rita Snizhko 
 
 
 
 Trustindex verifies that the original source of the review is Google. We couldn’t be happier with how our new deck turned out! From the very beginning, the whole process was so easy, and the Sidex Construction team was amazing to work with. They really listened to what we wanted and brought our vision to life exactly how we imagined it! Our outdoor space has completely transformed, and it’s now one of our favorite places to relax. It’s exactly what we had in mind for our home, and we honestly couldn’t have asked for a better result. We highly recommend Sidex Construction to anyone looking for quality work!
  
 
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   Amanda Kilgore 
 
 
 
 Trustindex verifies that the original source of the review is Google. Had a great experience working with Sidex. Nate was super helpful during the in-person site visit and took the time to explain everything clearly without making us feel rushed or pressured. Andrey was also very helpful with scheduling and keeping everything organized throughout the process. The whole team was professional, easy to work with, and communication was solid from start to finish. Really appreciated how smooth everything went. Would definitely recommend Sidex to anyone looking for quality work and good customer service.
  
 
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   Marjorie Siemsen 
 
 
 
 Trustindex verifies that the original source of the review is Google. Tim did a wonderful job fixing a leak on my skylight windows. Totally professional and very detailed in his work. I would definitely consider him for future work!