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


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.
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
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.