Construction workers and architects viewed from above

Introducing 4EA!

JRS Engineering LLC has rebranded in the United States and is now 4EA Building Science.


Our Bay Area Team

Our Oakland-based team has worked on many projects throughout California.

MOD X EDU website header

4EA is proud to sponsor MOD X EDU 2021

As part of our goal to help create a positive impact on the built environment, 4EA is a proud sponsor


4EA offices during Covid-19

4EA offices in Seattle and Oakland remain closed to the public for the time being in response to the COVID-19

Featured Projects

Ellie Passivhaus

One88 Building Crown

Featured Projects

One88 Bellevue

View All 4EA Projects

People working in a modern busy office
Even if you haven’t heard of us, we bet you know us.

Formerly JRS Engineering LLC, 4EA has been at the forefront of providing quality, value-conscious building science solutions since 2005. We work with architects, owners, and contractors to deliver high-performance buildings that deliver improved durability, energy performance and value.

Who We Are