Custom Deck Builder in Londonderry, NH
Upgrade your home with the permanence of Cold-Formed Steel and Fiberon Composite.
Building for "Apple Country" Terrain
Londonderry is known for its beautiful, rolling landscape and large wooded lots—but that same terrain can be a challenge for traditional deck building. Whether your home is perched on a rocky slope near the orchards or sits on a flat lot in a new development, the ground here moves.
At Lenzi Construction & Remodeling, we don't just build decks; we engineer outdoor living spaces that can handle Londonderry’s granite-heavy soil and deep frost lines. While many local decks built in the 1990s and early 2000s are now failing due to rot, we offer a permanent solution: Cold-Formed Steel Framing.
The Londonderry Upgrade: Why We Stopped Using Wood
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The Londonderry Upgrade: Why We Stopped Using Wood
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Drive through any neighborhood in Londonderry, and you’ll see the same story: beautiful homes with decks that are twisting, warping, or rotting at the structural level.
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Historically, builders used pressure-treated lumber because it was cheap. But with the wet winters and humid summers in Southern NH, a wood frame typically only lasts 15–20 years before it becomes unsafe.
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We believe your deck should last as long as your house.
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The Frame: We use Cold-Formed Steel (CFS). It is galvanized, perfectly straight, and guaranteed not to rot, warp, or feed termites.
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The Surface: We partner with Fiberon Composite Decking (Concordia & Sanctuary lines) to give you a splinter-free, low-maintenance finish that mimics exotic hardwoods.
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The Structure: For the ultimate "forever deck," we can replace ground posts and stair stringers with Structural Composite, making your deck 100% wood-free.
Our Process: Respecting Your Property
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Custom Designs
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Steel Framing
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Our Standard not an Upgrade
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Composite Decking
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Composite Railings
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Quality Craftsmanship
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Low Maintenance
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Styles and designs to fit your dreams.
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Remodel an existing structure or design a new one.
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Outdoor Curtains or Aluminum Screens
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Low Maintenance Finish.
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Create a finished, dry and useable space.
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Aluminum panel system with multiple finishes.
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Custom Seamless gutters to fit your deck.
The Lenzi "Clean Build" Advantage:
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Less Waste:
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No piles of pressure-treated scrap wood killing your grass.
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Laser-Straight:
Steel allows us to create perfectly flat surfaces, even on low-clearance decks like this one.
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Faster Install
We assemble the frame with precision engineering, often finishing the structure in half the time of a wood build
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The Results
A space that ties your home and yard together seamlessly.
Recent examples of our Steel-Framed decks -
available for our Londonderry clients.
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A collection of our most popular decking and railing options as well as suggested materials and designs to elevate your project.
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