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South Hill Data Center

Seattle's Home for Mission Critical IT

Scalable, Tier 3 Class, N+1 Colocation in Seattle with Over 40 Megawatts of Available Power

Ideal for high-end retail, hybrid and wholesale colocation, the South Hill Seattle data center is a fully N+1 Tier 3 facility created for scalable space, transpacific connectivity, mission-critical IT, high-density workloads and business continuity.

This data center sits within an 86-acre secure, private campus just thirty-five-minutes from SeaTac International Airport, a convenient commute from Seattle or Tacoma.



Disaster Recovery

Hybrid Colocation

The South Hill data center is perfect for the colocation of primary computing or private cloud infrastructure. It features fast connectivity with Asia-Pacific, over 40 megawatts of available power and the ability to withstand a magnitude 9 earthquake originating from the Cascadia subduction zone.

Onsite, users can connect to multiple Tier I carriers including CenturyLink, Comcast, Frontier and Zayo. Through existing dark fiber, your equipment can connect into the Westin Building Exchange and, via lit fiber, with the Pittock Building. These carrier hotels offer access to over 250 additional carriers and providers.


South Hill was designed and constructed to meet the rigorous standards demanded by chip manufacturers. It is independently certified by geotechnical engineers to withstand a magnitude 9 Cascadia zone subduction Earthquake. This is Seattle's most durable and state-of-the-art data center.

  • 10 Mbps – 100 Gbps blended internet
  • 60,000 ft2 raised floor whitespace
  • Available 150,000 ft2 shell data center
  • 48U to 52U cabinets provisioned
  • High-performance computing
  • Hybrid-cloud deployments
  • 24/7 onsite security
  • Card, biometric, CCTV and mantrap security
  • Campus perimeter and individual building fencing
  • Can withstand a magnitude 9 quake
  • Above the 500-year floodplain
  • Outside tsunami and lahar paths

Learn More About South Hill Seattle

Tier 3 N+1

Dual-fed and redundant power, cooling and connectivity. Resilient, flexible failsafe environment.


60,000 ft2 and 40+ megawatts available. Plenty of bandwidth for initial requirements and future growth.


Built LEED Gold with cost effective, green power sources. Keep your environmental footprint small.

Robust Facility

Independently rated to withstand a major magnitude 9 Cascadia zone subduction earthquake.

Tier 3 N+1 Data Center

South Hill is a Tier 3 data center with N+1 redundant and diverse connectivity, power and cooling. Data communications travel through fiber connections to our Downtown Seattle and Tacoma data centers then link to Colocation Northwest data centers in Bellevue and Redmond, then also link to three carrier hotels and West Coast PoPs.

Dual-fed electrical power arrives from two 115 kilovolt transmission lines. The evaporative cooling system is fed by two separate sources, up to two-million gallons per day.

Connectivity, power and cooling are all N+1 redundant. Both UPS and backup generators deliver full critical loads.

Learn more about South Hill or arrange to take a tour.

N+1 Connectivity

South Hill Seattle features its own meet-me room where data center users can interconnect with multiple Tier 1 and Tier 2 carriers.

Colocation Northwest's point of presence network, spans the U.S. West Coast, giving colocation users access to national and international routes with high-throughput, low latency connectivity to Asia-Pacific, Canada, Europe and the Americas.

The South Hill Seattle data center connects to the Westin Building Exchange, a major carrier hotel, via dark optical fiber. Additional lit fiber paths connect South Hill Seattle to the Pittock Building carrier hotel in Portland and to the One Wilshire carrier hotel in Los Angeles.

This network features access to multiple meet-me rooms, with over 250 carriers, network service providers and internet service providers inside the Westin building alone, and to transpacific cable landings in Washington and Oregon.

Our data centers inside the Westin building feature additional carriers including PCCW Global, a true Tier 1 carrier with deep global reach, perfect for organizations in need of transpacific connectivity.

Learn More About Connectivity

Multiple Carriers

Our extensive provider interconnectivity features over 250 carriers, network service providers and ISPs.

Globally Connected

High-speed access across transpacific cable landings with international carriers like PCCW Global.

Meet-Me Rooms

Onsite multi-carrier exchange plus access with three carrier hotels including dark fiber to the Westin building.

Transpacific Access

Interconnect with international Tier 1 carriers like PCCW Global through Colocation Northwest's fiber network.

Power and Cooling

South Hill Seattle supports high-density computing with 150 watts to 260 watts per square foot, delivering up to 35 kilowatts per cabinet. To achieve a high-power usage effectiveness, the data center employs state-of-the-art evaporative cooling. Both systems are N+1 redundant.


Colocation Northwest's South Hill Seattle data center has superior power management systems that are USGBC LEED Gold Certified. Our primary South Hill facility has over 40 megawatts of available power with additional on-campus buildings for custom buildout and additional power availability.

South Hill Seattle houses high performance computing systems offering over 35 kilowatts a cabinet. Power is delivered via a dedicated, dual-fed 50-megawatt substation supplied by renewable hydroelectric and wind generation sources. If additional electricity is needed the substation can be expanded.

Our South Hill uninterruptible power supply (UPS) systems offer true N+1 redundancy as do our backup generation systems, so your critical load needs are fully covered regardless of any event.


Our advanced, highly efficient evaporative cooling systems provides maximum availability of cooling to your equipment with a Power Usage Effectiveness (PUE) ratio of 1.3. Utilizing 100% of the outside air efficiencies provided by the temperate climate of the Pacific Northwest, our N+1 redundant cooling system offers a savings of more than 35% in energy and maintenance costs over similar data centers in the south and California.

Our cooling solution ensures your equipment is always at the right temperature and available to reach its maximum computing capabilities without issue. Colocation Northwest's data center has a dual-fed, 2 million gallon a day supply of water provided by two separate municipal sources ensuring fully redundant capability and operation.

Disaster Recovery and Business Continuity

From the outset, South Hill Seattle was constructed to be an exemplary disaster recovery and business continuity site, ideal for housing remote backups or a failover operation. Architects designed the facility to meet the demanding standards of microchip manufacturers.

Independent geotechnical engineers rate the facility to withstand a magnitude 9 earthquake originating from the Cascadia subduction zone. Buildings exceed seismic code specifications by 25%. The foundations sit on bedrock, safe from soil liquefaction and splintering, over 20 miles from the closest known fault line.

Learn About Hazard Mitigation (PDF)

IT Consulting and Managed Services

South Hill is ideal for hybrid colocation. Hybrid colocation users employ a large footprint or high-density computing, just like a wholesale or enterprise user does.

With hybrid, Colocation Northwest becomes your IT team, substituting the need to employ staff or contract with yet another service provider.

Our engineers and technicians can set-up and configure your equipment. Colocation Northwest IT consulting services include planning, procurement, deployment and configuration.

Users transferring hardware from on-premises or another data center can purchase migration service. We will disconnect your IT infrastructure, carefully package and safely transport everything, then install it inside your new data center.

Learn More About IT Consulting

Learn More About Managed Services

Find out why customers trust Colocation Northwest with their mission critical technology.

  • Family of Services
  • Colocation across the northwest, with data centers in South Hill, Seattle, Redmond, Bellevue and Tacoma. Perfect connectivity, cooling and power ensure servers and applications are always available.

  • CNW Logo

    Business internet connectivity and IT support. Fast, reliable options including gigabit fiber, business-class circuits, dedicated wireless and a full range of IT Support and helpdesk services.

  • One Server Hosting Logo

    Business-class dedicated server and cloud hosting services. Including cutting edge Dell dedicated servers, Virtual Private Server options and Plesk based hosting.

  • TrueRing Logo

    Business-class VoIP and SIP Services. Modern phone features including toll-free and local number options, free long distance fax to email, Find-Me-Follow-Me call routing and more.

  • Gigabit internet connections for office and residential buildings, as well as, large scale communities. Offering full featured, ultra-fast, fiber-based internet connectivity options at low rates.

  • Seanet Logo

    Residential internet connectivity, television and phone services. Fast internet options, reliable home phone services, personal web page hosting and satellite television options.