Custom Signs Seattle – Design, Fabrication & Installation Experts

Plumb Signs is a full-service sign company serving Seattle and the greater Puget Sound area, providing design, fabrication, permitting, and installation for custom business signs.

From downtown high-rises to retail centers and corporate campuses, we help brands stand out with signage that lasts.

From South Lake Union to SoDo, Ballard to Bellevue, our team has completed signage projects for corporate offices, mixed-use developments, hospitals, and retail environments throughout the Seattle metro area.

Complete Commercial Signage Solutions for Seattle Businesses

We provide end-to-end sign solutions — from design to installation — tailored to your business goals and local compliance requirements.

  • Pylon & Monument Signs
  • 3D Dimensional Letters
  • ADA & Braille Signage
  • LED & Digital Displays
  • Wayfinding & Architectural Signs

📞 Request a free on-site consultation in Seattle → Contact Us

Trusted by Leading Seattle Companies

For decades, Plumb Signs has partnered with Seattle’s top developers, architects, and corporations to deliver impactful signage that blends craftsmanship, technology, and urban appeal.

Project Highlights

  • Pylon sign installation for major retail center in South Lake Union
  • 3D illuminated sign system for a downtown corporate headquarters
  • Wayfinding signage package for a Seattle medical campus
Custom business signage Seattle WA Pylon sign installation Seattle WA

Pylon, Monument & 3D Signs – Built for Impact

Your Seattle signage needs to work hard in every condition — rain, shine, and heavy traffic. That’s why we engineer every sign with weather-resistant materials, energy-efficient LED lighting, and precise fabrication techniques.

All work is completed in-house for consistent quality control and accountability.

👉 Learn more about our Pylon & Monument Sign Services

Sign Permitting & Installation in Seattle

Navigating Seattle’s complex sign permitting process is easy with Plumb Signs. Our experienced project managers handle all paperwork, engineering, and communication with the Seattle Department of Construction & Inspections (SDCI).

Our Installation Credentials:

  • Licensed and insured across King County
  • Full-service installation fleet for multi-story and high-rise projects
  • Crane and bucket trucks for elevated signage installs

📄 Read our Seattle Sign Permit Guide

Why Seattle Chooses Plumb Signs

  • 35+ years serving Washington businesses
  • In-house design, fabrication, and installation
  • Local project management team for faster response
  • Award-winning craftsmanship trusted by major brands
  • Fully licensed, bonded, and insured

Frequently Asked Questions About Custom Signs in Seattle

Yes — our project managers handle all permitting through the Seattle Department of Construction & Inspections (SDCI), ensuring your signage meets all city codes and zoning requirements.

Absolutely. Our team is experienced with multi-story installations and rooftop logos throughout downtown Seattle and South Lake Union.

Most Seattle projects take 4–8 weeks from concept to installation, depending on permitting and fabrication needs.

Yes — we provide ongoing maintenance and repair services throughout King County to keep your signs bright and functional.

Request Your Seattle Sign Quote

Ready to bring your brand to life in Seattle? Contact Plumb Signs for a free design consultation or site visit. Our team will help you design, engineer, and install a sign that truly represents your brand.