What areas do you serve for earthquake retrofitting?

Evergreen Seismic serves Seattle, King County, Snohomish County, Skagit County, Island County, and Pierce County, WA. This includes Seattle, Everett, Tacoma, Bellevue, Kent, Renton, Lynnwood, Marysville, Mount Vernon, Anacortes, Oak Harbor, and surrounding areas.

Do you offer free consultations?

Yes, we provide free assessments in Seattle and most north-end areas. Contact us at (206) 984-2580 or schedule online for a free consultation.

Are you licensed and insured?

Yes, Evergreen Seismic is licensed, bonded, and insured. Business Lic #EVERGSL823JF. We have over 18 years of experience in seismic retrofitting.

What services do you offer?

We specialize in earthquake retrofitting, foundation repair, wood rot repair, and seismic gas shut-off valve installation for residential and commercial properties.

When was Evergreen Seismic founded?

Evergreen Seismic was established in 2018 by owner Matt Robinson, who has over 18 years of experience in seismic retrofitting and 22 years in general construction.

What is included in seismic retrofitting?

Our seismic retrofitting includes anchor bolts, shear panels, shear transfer ties, and hold-downs to address racking, sliding, and overturning forces during earthquakes.

Lessons From Recent Earthquake Activity in the PNW: The Role of Seismic Fastening

Seismic fastening is the backbone of how we keep homes and light commercial buildings tied to their foundations in the Pacific Northwest. The 2001 Nisqually earthquake reminded our region that deep events can still cause billions in losses when older structures are not anchored and braced correctly. More recently, offshore Oregon tremors, including a magnitude 5.8 west of Port Orford on September 8, 2025, show that regional shaking is not hypothetical. We design and install seismic fastening systems that help your structure ride out that energy and stay put.

Why Seismic Fastening Matters

Unreinforced sill plates, weak cripple walls, and aging connectors allow lateral loads to shift a building off its foundation. Proper anchor bolts, hold downs, and shear transfer ties create a continuous load path from roof to soil. That path reduces racking, limits wall separation, and lowers the chance of costly displacement during strong shaking. Washington and Oregon codes continue to evolve with new seismic data, which is why upgrades are often recommended even for homes that met older standards.

What We Install

We evaluate the crawlspace, rim joists, and shear walls, then select hardware that matches the framing and concrete strength. Typical scope includes epoxy set or expansion anchor bolts at code spaced intervals, treated sill plate replacement where needed, structural sheathing on cripple walls, and metal connectors that tie joists, beams, and plates together. Our team documents every location so owners and inspectors can see the continuous load path we created.

Lessons From Recent Quakes

Nisqually produced widespread nonstructural damage and highlighted vulnerabilities in older masonry and unanchored framing. Offshore Oregon swarms rarely trigger tsunamis, but they are a steady reminder that the Juan de Fuca plate boundary is active and that inland shaking is possible. Fastening and bracing are among the most cost-effective ways to reduce loss, especially for houses built before modern anchorage requirements.

Our Process

We start with a site review, photo documentation, and a written scope that aligns with local permit requirements. Installation follows manufacturer specifications for embedment, edge distances, and moisture protection. We finish with a clean workspace and a clear report for your records and insurance.

Call us at Evergreen Seismic at (206) 984-2580 to schedule a consultation for seismic fastening in the greater Seattle area. When we upgrade seismic fastening, we help your building resist lateral loads and stay connected when the ground moves.

B Snead

I came to know that my house was vulnerable to seismic events so I did some research on how to lessen the risk. The things it seemed I needed were things I didn't want to do myself so I looked around for a vendor and came upon Evergreen Seismic. Matt came out and looked at my house and recommended mediation that was almost exactly what my research had indicated and explained the technology in terms of my particular situation, which was appreciated. He even explained other steps he didn't think were needed, which he probably could have talked me into. I appreciated his honesty and knowledge. We scheduled the work and he did exactly what he said he'd do. I would recommend Matt and his company to anyone.

Warner Asch

We had a fantastic experience with Evergreen Seismic. From the initial estimate through the completed retrofit, everyone we worked with was professional, responsive, and easy to communicate with. Matt was especially great to work with—he took the time to answer our questions, explained the process clearly, and made us feel confident every step of the way. We never felt pressured and always felt like we were in good hands. The crew was punctual, respectful of our home, and completed the work efficiently while keeping the area clean and organized. We also chose to have an automatic seismic gas shutoff valve installed, and they made sure we understood how it worked before they finished. Our home was built in 1959, so it gives us real peace of mind knowing it has now been properly seismically retrofitted. The quality of the work and customer service exceeded our expectations. Thank you, Matt, and the entire Evergreen Seismic team! We highly recommend Evergreen Seismic to anyone looking for a knowledgeable, trustworthy, and professional company.

Blaine Robbins

Matt did a seismic retrofit for us recently. He was communicative and responsive throughout the entire process and did fantastic work, often going above and beyond what was necessary. I would highly recommend for anyone thinking about doing a retrofit.

Jonathan Glick

I'm very happy with the seismic retrofit work Evergreen Seismic did at our home. They were clear about the scope of work and reasonably priced compared to other providers. Matt and Phil were a pleasure to work, worked around our schedule, and got the job done quickly. They work with a well-known engineering company so I'm confident the work meets a high standard.

Alex

Matt & Phil did an absolute fantastic job seismically retrofitting our home. There were several stages in the process where the team went well above and beyond what was required. Generally it is hard to find Contractors you can trust and Evergreen Seismic is absolutely among the few that you could trust to do a great job!

Brian Moynihan

Matt and Phil went above and beyond on the seismic retrofit of our 1919 home. They repaired some rot that was discovered during the process, and still got the project done within the estimated number of days. They also replaced some questionable posts and strengthened a compromised beam - things that other contractors did not include in their bid. Very reasonably priced.

Beck Royer

Excellent professional and a knowledgeable company! Matt was prompt, and helped us with an insurance renewal and on site visit!! Great all round and honest Beck

Cameron Skaggs

Matt and his team were very professional. He helped explain the process and was very transparent with everything. They worked quickly too. I'd recommend them unhesitatingly to anyone looking to retrofit their house for earthquakes

Jaymes Dee

Matt and his team were beyond helpful during our journey to seismic retrofit our 1953 home. At first I was certain I would be doing the retrofits and Matt was gracious enough to come and venture through my crawlspace with me and give me pointers. When life and all of it's entanglements got in the way, Matt and his team were able to knock out the work expeditiously for a very reasonable price. My family and I feel safer because of the work they did. 10/10 recommend.

Erik Peterson

I can't say enough great things about Evergreen Seismic. If I could, I would give them 6/5 stars! Matt was such a pleasure to work with. He was so knowledgeable, patient, responsive, generous with his time, and such a resource. He explained complicated topics into basics I could understand, and also adjusted his approach based on some constraints we had. If you are looking to do any kind of seismic retrofit for your home, you should reach out to Matt and his team at Evergreen Seismic. Just...wow. So refreshing to work with some true professionals.