- Built Green 4-Star · Certified
Sustainability,
engineered in.
Not a marketing claim – a third-party-verified 4-Star certification from the Master Builders Association. Every system audited. Every spec documented.
Four systems,
verified.
Energy Efficiency
Heat-recovery ventilation (HRV), LED throughout, Energy Star appliances, R-21 wall insulation - exceeds WA state code by 15%.
Water Conservation
Low-flow WaterSense fixtures, dual-flush WCs, drought-tolerant native landscape - projected 30% reduction vs baseline.
Healthy Materials
FSC-certified wood, Green Seal paints/sealants, FloorScore-certified flooring, formaldehyde-free insulation.
Transit & Access
Two blocks to Link. Secure Dero bike storage. EV-ready wiring at every stall.
- The specs
Drawn as
architecture.
Independently verified as part of the Built Green audit – not marketing numbers.
Envelope U-value
0.28
BTU/h·ft²·°F
R-21 wall · R-38 roof
Glazing
U-0.30
LOW-E · ARGON
Triple-pane north exposure
Ventilation
HRV
75% EFFICIENT
Continuous fresh air · per suite
Sound attenuation
STC 54
PARTY WALL
Floor IIC 58 · exceeds code
- FAQ
Questions,
answered.
What is Built Green 4-Star certification?
Built Green is the Master Builders Association of King & Snohomish Counties’ green building certification program. A 4-Star rating – second-highest tier – requires third-party verification of energy, water, materials, indoor air, and site design. Exceeds Washington State code by ~15%.
How much does it save on utilities?
Based on MBA’s 2024 cohort data, Built Green 4-Star units average 22–28% lower utility bills than comparable code-minimum units. Residents report heating + electric bills under $60/month in a 1-bedroom.
Are the materials really low-VOC?
Every paint, stain, sealant, and adhesive meets the Green Seal GS-11 standard. Insulation is formaldehyde-free mineral wool. Flooring is third-party tested for VOC emissions (FloorScore).
What about transit and car-lite living?
Stream 403 is two blocks from Capitol Hill Light Rail (6 minutes to downtown, 32 to SeaTac). Dero secure bike storage included. EV-ready parking available at $200/month – every stall has Level 2 capability.
Do you have any question?
Contact us at the office nearest to you or submit a business inquiry online
See it in person.
The best way to understand the building is to stand on the roof at sunset. Tours run 20–30 minutes; we confirm within one business hour.