Existing Multifamily Buildings (Washington)
Increasing energy efficiency in multifamily properties can reduce operating expenses, raise tenant satisfaction and improve building marketability. Energy Trust offers cash incentives for energy-efficient equipment and retrofits at existing multifamily properties with two or more units. When you install energy-efficient equipment, you’ll see savings that can help your building stand out in a competitive market and contribute to tenant comfort and lower energy bills. Want your energy savings to stand out? Bring us in.
Incentives are available for commercial firm and interruptible sales customers served on rate schedules 1, 3, 41 and 42.
Project Examples

Apartment Building
Project Type: Tank Water Heaters
Project Cost: $158,200
Incentive: $5,000
Annual Savings: 4,400 therms

Apartment Building
Project Type: Boilers
Project Cost: $37,700
Incentive: $5,700
Annual Savings: 2,300 therms
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Check your eligibility.
Read More >Energy Trust provides cash incentives to businesses for energy-efficiency and renewable energy projects. To qualify, you must:
- Have a commercial, industrial or institutional facility project site in Washington served by
NW Natural. Washington customers are eligible for gas incentives only. Additional requirements may apply. - Be improving an existing structure.
- Have a commercial, industrial or institutional facility project site in Washington served by
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Find a trade ally contractor.
We can help you get started.
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Install equipment that meets the requirements listed in the Washington Existing Multifamily Application.
Confirm equipment requirements here.
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Submit documentation.
Download Application (PDF) Download Application (Excel) Download W-9 (PDF)
Send by Mail
Energy Trust of Oregon
Existing Buildings
811 SW 6th Ave, Suite 800
Portland, Oregon 97204Send by Email
existingbuildings@energytrust.orgSend by Fax
503.525.6150 -
Get your incentive.
Note: A post-installation verification may apply.
Equipment | Incentive |
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Condensing Furnace | $1.50–$3/kBtu/h input capacity |
New Rooftop Unit (RTU) with Demand Controlled Ventilation (DCV) | $29/ton |
Commercial Tank Water Heater | $3.25/kBtu/h input |
Tankless Water Heater < 200 kBtu/h | $300 each |
Tankless Water Heater/Boiler ≥ 200 kBtu/h | $2.25/kBtu/h each |
Commercial Condensing HVAC Boiler | $3.25/kBtu/h input |
Domestic Hot Water (DHW) Recirculation Pump Control - Aquastat | $100–$300/system |
DHW Recirculation Pump Control - Learning | $100–$300/system |
DHW Recirculation Pump Control - On Demand | $300–$1,900/system |
Steam Trap | $100/trap |
Thermostatic Radiator Valves | $100 each |
Commercial Condensing Pool Heater | $2.35–$3.50 /sq ft of pool surface area served by heater |
Clothes Washer, Common Areas | $65 each |
Clothes Washer, In-Unit | $30 each |
Gas-fired Automatic Conveyor Broiler | $2,015–$2,925 each |
Gas Convection Oven | $315 each |
Gas Combination Oven | $750 each |
Gas Rack Ovens | $2,500–$5,000 each |
Gas Fryer | $1,000/vat |
Gas Steam Cooker | $1,850 each |
Commercial Vent Hood with DCV | $750/controlled motor hp |
Dishwashers | $195–$900 each |
Attic/Ceiling Insulation | $0.25/sq ft |
Flat Roof Insulation | $0.30/sq ft |
Pipe Insulation | $4/lineal ft |
Ready to apply for standard incentives? Download general project forms. If you need guidance, just ask your trade ally contractor for assistance.
Custom Incentives
Energy Trust offers custom incentives for larger, more complex projects. Eligible participants can receive up to $75,000 per site, per year for qualifying projects. Learn more about custom incentives >
Incentives are subject to funding availability and may change.