Structured cabling and low-voltage installation in Seattle
Cablify installs network cabling, fiber, security cameras, access control and Wi-Fi across the Puget Sound, from South Lake Union and the Eastside to Everett, the Kent Valley and Tacoma.
- King County
- Seattle, Bellevue, Redmond, Kent
- Snohomish County
- Everett, Lynnwood, Bothell
- Pierce County
- Tacoma, Puyallup, Fife
Washington licenses telecom and limited energy work
Washington splits low-voltage work into specialties under the state electrical law, and the specialty decides who may install what.
| Specialty | What it covers | Who installs |
|---|---|---|
| 09 Telecommunications | Voice, data and video cabling and pathways, including tray and ladder rack in telecom rooms. CCTV only when it has no integrated controls. | No individual certificate needed. The contractor needs a certified telecom administrator and a bond. |
| 06 Limited Energy | Low-voltage signaling and power-limited circuits, including fire protection signaling, intrusion security, energy management, automation, lighting control and sound. | Certified specialty electricians or trainees, with limits on trainees per electrician. |
| 01 General | All electrical work, including telecom and limited energy systems. | Certified electricians. |
Who permits the work
Seattle runs its own electrical program, and several Eastside and north Sound cities do too.
Seattle
SDCI, not L&I, issues electrical permits in Seattle. Under the 2023 Seattle Electrical Code, in effect since November 15, 2024, communications and fiber wiring is exempt only in one- and two-family homes, so commercial data and fiber work needs a permit.
Kent and other L&I areas
A telecom permit is needed for more than 10 outlets, for all backbone cabling and for any work that passes through a fire barrier. Annual permits are available for ongoing work.
Bellevue, Redmond, Everett and Tacoma
Each runs its own electrical permit program, with Tacoma’s handled by Tacoma Power. We check each city’s rules when we scope the job.
Radio coverage and fire alarm
In Seattle, stand-alone DAS and radio coverage permits need a 01, 02, 06 or 09 contractor, and small fire alarm changes need a 01, 02 or 06 contractor.
Around the Sound
Tech campuses, aerospace, ports and warehouses within an hour of each other.
Downtown and South Lake Union
Amazon’s headquarters, with about 50,000 corporate employees in Seattle in 2024, plus downtown office towers.
Bellevue
Downtown towers along I-405, where Amazon had nearly 12,000 employees by 2024.
Redmond
Microsoft’s 502-acre headquarters campus, where a modernization plan called for 17 new buildings.
Everett
Boeing’s assembly plant, the largest building in the world by volume, and the suppliers around it.
Kent Valley
One of the West Coast’s largest manufacturing and warehouse areas, with more than 45 million square feet.
Westin Building Exchange
The region’s main carrier hotel at 2001 Sixth Avenue, with more than 150 carriers.
The ports keep the warehouses busy. The Northwest Seaport Alliance moved about 3.2 million twenty-foot container units through Seattle and Tacoma in 2025, and Kidder Mathews counts about 411 million square feet of industrial space across the Puget Sound.
Common questions
Do I need a permit for network cabling in Seattle?
In commercial buildings, yes. Since the 2023 Seattle Electrical Code took effect, communications and fiber wiring is exempt only in one- and two-family homes. We pull the SDCI permit and schedule the inspection.
Do you cover Bellevue, Redmond and Tacoma?
Yes. Our Seattle market covers the Puget Sound metro area, including Bellevue, Redmond, Kirkland, Everett, Kent, Renton and Tacoma.
Do racks need seismic bracing in Seattle?
Western Washington is an active seismic region, so floor-standing racks are anchored to the slab and cable tray is braced to the structural details on the drawings or from your engineer.
Can you work in the Westin Building or other colocation sites?
Yes. We install cabling, racks and fiber in cages and suites, and order cross connects through the facility to its access and labeling rules.
Request a quote in Seattle
Send the address, building type and what you need installed. For sites around the Sound, list each city.