4x4 Black Steel Fence Posts
The ultimate long-term investment. Barrier Boss steel posts backed by a robust 40-year warranty—won't rot like wood.
Why Upgrade to Steel Posts?
40-Year Warranty
Barrier Boss backs these posts with a robust 40-year warranty. This is a true long-term investment that outlasts any wood post on the market.
Won't Rot Like Wood
Unlike traditional wood posts that rot out over time, steel posts are immune to ground-rot, moisture damage, and insect infestation.
9' and 12' Options
Available in 9' tall (for standard 6' fences) or 12' tall (for 6' fences with 2' lattice toppers for added privacy and style).
Modern Industrial Aesthetic
The black powder-coated finish complements cedar framing beautifully, creating that sought-after industrial/modern look with PNW warmth.
Long-Standing Asset
These are an investment for a long-standing fence—not a temporary solution. Perfect for homeowners who want to build once and never worry again.
Clear Pricing
9' posts: ~$225/post. 12' posts: ~$250/post. Pricing subject to change from Barrier Boss, but always transparent from us.
Ideal for Wet Soil Areas
Steel posts are especially valuable in areas with high moisture, poor drainage, or saturated soil conditions. Unlike wood posts that absorb moisture and accelerate rot, steel posts remain unaffected by ground water levels.
We highly recommend steel posts for properties in:
Properties near lakes, rivers, wetlands, or in low-lying areas benefit most from the rot-proof nature of steel posts.
Available Sizes
Tall Posts
- Perfect for standard 6' tall fences
- ~24" set in ground with concrete
- ~$225/post (subject to change)
Tall Posts
- 6' fence + 2' lattice topper capability
- ~24" set in ground with concrete
- ~$250/post (subject to change)
Professional Installation Process
Precise Layout
We carefully measure and mark post locations to ensure perfect alignment and proper spacing for your fence line.
Deep-Set Installation
Each post is set approximately 24" deep and secured with about 3 bags (180 lbs) of concrete per hole for maximum stability.
Quality Assurance
We verify plumb, level, and alignment before the concrete sets—ensuring a fence that stands straight for decades.
Perfect Pairings
Barrier Boss Panels
Pair with Barrier Boss corrugated steel panels for a complete steel-core fence system. See our Cedar/Steel Hybrid Fence for details.
ColorMax Panels
Also compatible with ColorMax steel panels for the same industrial/modern aesthetic with cedar framing.
Cedar Framing
The black steel posts complement cedar rails and framing beautifully—combining industrial strength with PNW warmth.
Lattice Toppers
12' posts are ideal for adding 2' horizontal or vertical lattice toppers for enhanced privacy and style.
Steel Posts in Action
Steel vs. Wood Posts
| Feature | Steel Posts | Wood Posts |
|---|---|---|
| Warranty | 40 Years | None (material) |
| Rot Resistance | 100% Immune | Will eventually rot |
| Expected Lifespan | 40+ Years | 15-30 Years |
| Upfront Cost | Higher | Lower |
| Long-Term Value | Excellent | Good |
Ready for a Fence That Lasts Decades?
Invest in 4x4 steel posts from Barrier Boss. Get a free quote today and discover why Seattle homeowners are choosing steel for their forever fence.
We stand behind our work with a comprehensive 36 month warranty on all installations — your peace of mind guaranteed.
Expert Fence Insights & Advice
Get professional advice on fence installation, maintenance, and costs from Seattle's trusted fencing experts
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Get Your Instant Fence Quote with Our Advanced Virtual Tool
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Our Service Area
Proudly serving the greater Seattle area within a 28-mile radius
Service Areas
Professional fence installation across King County, Pierce County, and East King County