Zero Energy Certified


Creekside Community High School is a 17,830 sf building located in Tigard, OR, which is a suburb of Portland. The building operates on a typical high school schedule with mostly full occupancy from approximately 8am-5pm from September 14th to June 16th, and reduced usage in the summer months. The building also has very limited use during the week of Thanksgiving and the Winter holiday break. Main spaces include typical classrooms, a computer classroom, a science lab, a workshop/maker space, and learning/demonstration kitchen. The workshop/maker space and computer classrooms have relatively large process loads and have seen higher than expected use so far. The school is part of the Tigard-Tualatin School district. The building completed construction in June 2019 and tracking for Net Zero Energy started in July 2019. The building’s design includes energy efficient systems and a 120 kW roof mounted solar array. There is no gas usage or combustion of any kind at the building. The building features advanced energy metering systems to record total building energy usage and solar array production.

vital stats

Certification StatusZero Energy Certified
Version of LBC3.1
LocationTigard, OR, USA
Project Area17,856
Start of OccupancySeptember 2019
Owner OccupiedYes
Occupancy TypeEducational Building
Number of Occupants155

project team

OwnerTigard-Tualatin School District
Project ManagerDay CPM
General ContractorRA Gray
ArchitectBora Architects
MEP EngineerGlumac
Structural EngineerKPFF
Civil EngineerKPFF
Landscape ConsultantPLACE
Interior DesignerBora Architects
Lighting DesignGlumac
GeotechnicalGeotechnical Resources, Inc.

Photo Courtesy of Creekside Community High School


Wall R value and section specificationR20. Rainscreen system with fiber cement siding and fiberglass girt sub-framing.
Roof R valueR30
Window to Wall Ratio15% – 25%
WindowsFiberglass frame with double-pane glazing. U value = 0.29, SHGC = 0.27
Air infiltration rate and sealing protocol0.107 cfm/sf. Sealing consisted of Prosoco R-Guard air and water barrier system.

renewable production systems information

Solar electric PV inverter with a 120 kW renewable capacity.

Photo Courtesy of Creekside Community High School


Actual energy use during performance period98,287 kWh
Actual energy produced during performance period144,648 kWh
Net Energy Use-46,361 kWh
EUI18.8 kBTU/sf/yr


Daylight controls, daylighting, LED lights, and occupancy sensors.

Photo Courtesy of Creekside Community High School

Energy systems narrative

HVAC equipment includes energy recovery ventilators (ERVs), and variable refrigerant flow (VRF) condensing units which serve fan coils. The ERVs provide ventilation air. Domestic hot water is provided by an electric resistance hot water heater. The building has a roof mounted 120kW PV array.

occupancy issues

Creekside Community High School completed construction and began operation in July 2019 but has seen reduced occupancy since March 2020 due to the COVID-19 pandemic. Based on the metered data prior to the pandemic, the building was on track to meet Net Zero Energy, with an energy production surplus. A memo summarizing the situation was provided to and accepted by ILFI.