Downstream Construction LTD is the premier High Performance Design/Build firm in Lake County


High Performance Construction

Design services

New Construction

Garage Construction

ADU Construction

Home Ventilation



Build With Us

We pride ourselves on a quality product that will last a lifetime. Our experts execute with high attention to detail and a superb build quality.
Our team is dedicated to keeping you informed and involved in the process. We believe that communication is key to ensuring you receive the home of your dreams.
Our bid process ensures you get the highest quality product at a reasonable price. You can be assured that with us, we strive for straightforward estimates with minimal surprise fees.

Contact Us

Building your home is an exciting process. We know you may have questions that come up along the way and are ready to answer them. No matter what phase of the homebuilding journey you are in, we’re excited to speak with you. You’ll be asked to complete a short questionnaire to ensure we reach out with all the right details.
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