Concrete Contractor
Services
From driveways that handle PNW winters to patios that extend your living space — Allied1 pours concrete flatwork with proper base prep, reinforcement, and finish work on every job. Serving the greater Seattle Eastside since 2001.
Driveways
Poured concrete driveways built to handle PNW freeze-thaw cycles.
Patios
Outdoor patios that extend your living space — smooth, stamped, or exposed.
Walkways & Sidewalks
Clean, safe walkways and paths that connect your property.
Decorative & Stamped
Stamped and colored concrete that looks like stone, brick, or wood.
Retaining Walls
Structural retaining walls that hold back earth and look good doing it.
Foundations & Slabs
Garage slabs, shed pads, and foundation work for GCs and homeowners.
Paver Installation
Precision-laid paver driveways, patios, and walkways.
Why Allied1 for Your Flatwork
Proper Base Prep
Every pour starts with excavation, gravel base, and compaction. This is where cut-rate crews cut corners — and where cracks begin. We don't skip it.
Reinforcement Standard
Rebar or wire mesh on every pour, not just "if you ask for it." Reinforcement is what keeps your slab together through freeze-thaw cycles and soil movement.
Correct Control Joints
Concrete will crack — that's a fact. But control joints tell it where to crack. We place them at the right spacing and depth so cracks stay invisible.
Written Quote First
You get a clear, written quote before any work starts. No vague ballparks, no surprise add-ons. You know exactly what you're paying for.
Related Resources
Ready to Start Your Project?
Get a free, no-pressure on-site estimate. We'll measure, assess your site, and give you a clear written quote — no surprises.
Mon–Sat, 7:00 AM – 5:00 PM · Free on-site estimates · Sammamish, WA