Toronto & GTA · Since Day One
SZ Obsidian Builds designs and constructs custom decks tailored to each property, balancing structural durability with clean architectural lines.
Custom Deck Design & Construction
Wood & Composite Decking Systems
Multi-Level Decks
Integrated Seating & Features
Deck Rebuilds & Repairs
Serving Toronto & Greater Toronto Area
Who We Are
Every deck we build is carefully framed and finished to ensure it performs through Toronto’s demanding seasons, from freeze-thaw cycles to humid summers, while maintaining a refined appearance year after year.
Whether the project calls for modern composite materials or traditional wood construction, our focus remains the same: precision carpentry and long-term durability that adds lasting value to your home.
We offer a wide range of quality stains to complement your home’s exterior palette, from natural cedar tones to deep charcoal and ebony finishes.
Our Expertise
Pressure-treated lumber remains one of the most reliable and cost-effective materials for outdoor decks in the Toronto climate. We build pressure-treated decks with proper framing, fasteners, and drainage design to maximize the lifespan of every structure. A quality stain seals and protects the wood while giving it a polished, finished appearance.
Composite decking offers the look of wood with significantly less maintenance. Our composite deck installation process includes proper substructure framing, hidden fastener systems, and precise board layout, all critical to the long-term performance of a composite surface. Ideal for homeowners in Toronto and the GTA who want a low-maintenance, premium finish.
Multi-level custom decks maximize usable outdoor space on properties with grade changes, walk-outs, or larger footprints. We design and build multi-level deck systems with integrated stairways, landings, and railings that flow naturally between levels. Each tier is independently framed and engineered to handle load and movement.
We specialize in deck framing for new builds and structural repairs for existing decks showing signs of rot, movement, or compromised connections. From ledger board replacement to joist sistering and beam reinforcement, our team identifies and corrects structural deficiencies that affect both safety and longevity. All framing work meets Ontario Building Code requirements.
Proper footing installation is the foundation of every durable custom deck. We excavate and pour concrete footings to frost depth, accounting for Toronto’s freeze-thaw cycles that can cause movement in poorly installed bases. Whether using tube forms, helical piers, or precast systems, our footing work is designed to keep your deck level and stable for decades. No heaving. No shifting. No compromise.
Design Process
Every project at SZ Obsidian Builds begins with a design conversation. We work with each homeowner to understand how the space will be used, what aesthetic fits the home, and what structural demands the site presents. Our custom deck designs balance form and function — integrating seating, planters, lighting rough-ins, and transitions to the yard where they make sense.
Service Area
SZ Obsidian Builds builds custom decks across Toronto and the Greater Toronto Area. From downtown Toronto to the surrounding municipalities, we bring the same standard of precision carpentry and custom design to every project.
Toronto
Mississauga
Brampton
Oakville
Markham
Richmond Hill
Vaughan
North York
Scarborough
Etobicoke
Get Started
From the first site visit to the final coat of stain, SZ Obsidian Builds handles your project with precision and care. Serving Toronto and the GTA.
No Obligation Quote
500+ Happy Clients
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