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Our Mission

Through our home energy efficiency consulting services, we intend to promote healthy, energy & water-efficient affordable housing throughout the United States. By redcuing the monthly energy utilitiesThrough our work, we plan on contributing to measurable improvements in existing properties and do our best to shape the future of energy-efficient housing policy in the United States.

Oregon Cobid Certified

Su Casa Energy Consulting is an Oregon COBID-certified Minority Business Enterprise (MBE) and Emerging Small Business (ESB). Our firm has bilingual members on staff that are fluent in Spanish. 

!Nosotros Hablamos Español!

William Castrillón
Principal Owner/Operator

William is a Spanish-speaking native of Georgia who found himself at home in the Pacific Northwest. He is an environmental engineer by trade and decided to specialize his career in green building construction. Since starting his construction career, William has gained extensive experience in the green building industry, having verified several hundred multifamily units and single-family homes green certified under various green building certification programs. Additionally, he has designed, managed, and constructed many residential solar and energy storage systems. William is passionate about helping others monopolize the tax credits and rebates available for energy-efficient construction.

When not working, William will be found riding his mountain bike, tossing a lure in a river, or chilling in a hammock doing his best to enjoy the moment.

William is certified in the following building certification programs:

RESNET Certified HERS rater

BPI Certified Building Analyst

NGBS 2015/2020 Building Verifier

Energy Star SF/MF V3/3.1 Verifier

DOE Zero Energy Ready Homes Verifier

Energy Trust of Oregon -- Trade Ally

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