Construction workers and architects viewed from above

JRS Engineering is Now “4EA Building Science”

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

IMPACT Film Festival Banner. Source: DESC

Join us for the first annual DESC Impact Short Film Festival

4EA is proudly sponsoring the first-ever short film festival presented by Seattle’s Downtown Emergency Service Center (DESC) this Thursday, September

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


Our Bay Area Team

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


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