01Decks
Composite and wood decks engineered for the long haul — covered structures, multi-level layouts, aluminum railing and lighting.
- Composite & cedar
- Covered & screened
- Aluminum railing

Tell us what you'd like to accomplish. We'll help you explore the options and find a solution that fits your home, your goals and your budget.
Free Project Suggestion & DesignSee what your finished space could look like — describe your project, add a few photos, and get a plan back in about a minute.Start NowFree Estimates • Licensed & Insured • 5-Year Labor Warranty
What we build
Every trade is run in-house or by a vetted partner we've worked with for years — so the detail on day one matches the detail on the walkthrough.
01Composite and wood decks engineered for the long haul — covered structures, multi-level layouts, aluminum railing and lighting.
02Vinyl, wood and ornamental fencing set to line, plumb and grade — privacy, picket and pool-code enclosures with clean gate hardware.
03Stamped concrete, paver patios, seat walls and segmental retaining walls built on properly compacted, drained base.
04Full gut renovations with waterproofed shower systems, tile work, vanities and lighting — finished on a published schedule.
05Layout changes, cabinetry, quartz counters, flooring and lighting brought together into one coordinated build.
06Code-compliant basement egress cut, shored and drained — window, well, cover and finished trim in one crew visit.
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How it runs
We walk the property, take measurements, talk materials and budget ranges — no pressure, no ballpark guessing.
You get a drawn layout, material selections and a written scope with a fixed price before anything is ordered.
We pull the permits, coordinate inspections and lock a build window so you know exactly when crews arrive.
Clean site daily, photo updates as we go, and a punch-list walkthrough before we ask for the final payment.
The benchmark
Based in O'Fallon, Missouri, Benchmark Structures serves the greater St. Louis area, with much of our work in St. Charles and St. Louis Counties. The goal isn't to sell you our preferred solution — it's to find the right one for you.
We are licensed and insured for the work we perform, so your project and your home are covered.
Our workmanship is backed by a five-year labor warranty, and every estimate is free.
Your project starts with a conversation, not a sales pitch — your goals, budget and home come first.
Sometimes a patio, a redesigned deck or a cover makes more sense. We'll help you weigh the alternatives.
We recommend from experience but happily price other manufacturers — or materials you choose, once we approve them for the job.

Let's talk about your project
You don't need every detail figured out. Tell us what you'd like to change, improve or accomplish — even if it isn't listed, like replacement windows, doors or a basement finish — and we'll help you find the best next step. Prefer to talk now?
(314) 330-2750