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TRUSTED BY SHERWOOD, OR HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon12
    Verified earthquake retrofitting services reviews

Find Earthquake retrofitting specialists in Sherwood

Avatar for Secure Seismic, LLC

Secure Seismic, LLC

5.00(
17
)
Approved Pro

Secure Seismic, LLC

5.00(
17
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
9 years of experience

Our happy and satisfied customers recommend us to their friends and family all the time. We are proud of our reputation and we feel it has been well earned. We are also happy that we can help you feel good knowing that you are working with a reputable company that stands behind its products and services.

"I hired Secure Seismic to do a retrofit of my single story ranch built in the 1970s. Though I'm in the southern Willamette Valley and a ways from Portland, Daryl came down to give me a free estimate. Secure Seismic came in below their competitors and Daryl discusssd the plan with me in depth. Based upon the quality of the reviews, I hired Secure Seismic. They scheduled out within a couple of weeks. Johny the foreman kept me on the loop while they were at my house. They completed the job within a day and left the site clean. Pieces of drywall cut for access in the garage were thoughtfully replaced and will take little effort to clean up. Thanks for great work! I already sleep a little better knowing that my house will likely be okay when the big one hits."

Michael S on April 2024

Our happy and satisfied customers recommend us to their friends and family all the time. We are proud of our reputation and we feel it has been well earned. We are also happy that we can help you feel good knowing that you are working with a reputable company that stands behind its products and services.

"I hired Secure Seismic to do a retrofit of my single story ranch built in the 1970s. Though I'm in the southern Willamette Valley and a ways from Portland, Daryl came down to give me a free estimate. Secure Seismic came in below their competitors and Daryl discusssd the plan with me in depth. Based upon the quality of the reviews, I hired Secure Seismic. They scheduled out within a couple of weeks. Johny the foreman kept me on the loop while they were at my house. They completed the job within a day and left the site clean. Pieces of drywall cut for access in the garage were thoughtfully replaced and will take little effort to clean up. Thanks for great work! I already sleep a little better knowing that my house will likely be okay when the big one hits."

Michael S on April 2024


Avatar for TerraFirma Foundation Systems

TerraFirma Foundation Systems

4.63(
66
)
Approved Pro

TerraFirma Foundation Systems

4.63(
66
)
Approved Pro
Customers say: True professional
80 local quotes requested
20 years of experience

Thousands of NW homeowners have trusted TerraFirma Foundation Systems to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! TerraFirma is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"Awesome crew. Work was done as promised and house is now secure and level."

JoAnn T on November 2025

Thousands of NW homeowners have trusted TerraFirma Foundation Systems to keep their homes safe, dry and stable since 2005. Nearly half of our business comes from referrals or repeat customers. We can help you too! TerraFirma is the NW expert in home foundations, basement and crawl space waterproofing, concrete leveling, and wall stabilization.

"Awesome crew. Work was done as promised and house is now secure and level."

JoAnn T on November 2025


Avatar for Foundation King of Oregon

Foundation King of Oregon

4.50(
8
)

Foundation King of Oregon

4.50(
8
)
Customers say: Quick response
11 years of experience

We are your foundation experts for all of Western Oregon. Call us to discuss the issues you are having and we'll help diagnose your problems and find the best solution for you. We specialize in foundation repair, basement and crawl space conversions, seismic retrofitting, foundation crack repair, stabilizing leaning walls and new foundations under existing homes. We can expand your crawl space or low ceiling basement to livable, usable space that increases the value of your home. Foundation King also provides structural piering, a permanent way to stabilize sinking foundations. We can also provide general contracting services including drywall, stucco and utility services making Foundation King a one stop shop for all of your basement and crawl space needs. Call Jeff today!

"If I could give zero stars I would. Completely unprofessional and crappy work. Cemented over our water shut off. Subcontracted everything and didn’t even check their work."

Heath R on December 2022

We are your foundation experts for all of Western Oregon. Call us to discuss the issues you are having and we'll help diagnose your problems and find the best solution for you. We specialize in foundation repair, basement and crawl space conversions, seismic retrofitting, foundation crack repair, stabilizing leaning walls and new foundations under existing homes. We can expand your crawl space or low ceiling basement to livable, usable space that increases the value of your home. Foundation King also provides structural piering, a permanent way to stabilize sinking foundations. We can also provide general contracting services including drywall, stucco and utility services making Foundation King a one stop shop for all of your basement and crawl space needs. Call Jeff today!

"If I could give zero stars I would. Completely unprofessional and crappy work. Cemented over our water shut off. Subcontracted everything and didn’t even check their work."

Heath R on December 2022


Cascade Seismic, LLC

No reviews yet

Cascade Seismic, LLC

No reviews yet
Free onsite estimate

We make homes more secure, proving earthquake retrofitting services from start to finish. We visit your home, draw up plans, get them approved by the city, complete the work, and make sure that they pass inspection. We are licensed, bonded, and insured, Oregon CCB License #211369.

We make homes more secure, proving earthquake retrofitting services from start to finish. We visit your home, draw up plans, get them approved by the city, complete the work, and make sure that they pass inspection. We are licensed, bonded, and insured, Oregon CCB License #211369.


Dad's PDX

No reviews yet

Dad's PDX

No reviews yet
25 years of experience

Dad's PDX offers a variety of services to our clients. We are there to take care of the jobs that you need done. We are at heart a Handy Man service.

Dad's PDX offers a variety of services to our clients. We are there to take care of the jobs that you need done. We are at heart a Handy Man service.


GNC Construction

No reviews yet

GNC Construction

No reviews yet
Free onsite estimate

GNC Construction has a combined total of 40 plus years of experience. We specialize in residential and commercial building. Our staff is experienced in many different trades and we take pride in our craftsmanship and detail. With backgrounds in drywall, steel and wood framing GNC Construction has expanded out to numerous trades. We are certified in steel work, siding, all building trades, painting, plumbing, electrical.

GNC Construction has a combined total of 40 plus years of experience. We specialize in residential and commercial building. Our staff is experienced in many different trades and we take pride in our craftsmanship and detail. With backgrounds in drywall, steel and wood framing GNC Construction has expanded out to numerous trades. We are certified in steel work, siding, all building trades, painting, plumbing, electrical.


"We had a series of problems but the final straw is the brand new front door to our studio hanging off the hinges after less than a year and the owner will not stand behind his work. We have opened a complaint with the BBB and we had to hire another contractor of Angi to fix their incompetent hung door installation."

William S on December 2022

Bacharach Construction LLC is a licensed, bonded and insured General Contractor. Major projects include new construction, remodeling, etc.

"We had a series of problems but the final straw is the brand new front door to our studio hanging off the hinges after less than a year and the owner will not stand behind his work. We have opened a complaint with the BBB and we had to hire another contractor of Angi to fix their incompetent hung door installation."

William S on December 2022


Seismic Safe helps keep Oregon safer by providing Retrofit services to Residential homes


Avatar for On Level Services

On Level Services

No reviews yet

On Level Services

No reviews yet
29 years of experience

Primary service is the re-leveling of Mobile Homes and the repair and refurbishing of Mobile Home foundations. Since Angies list doesn't offer this business category as an option I had to list other categories that got close.

Primary service is the re-leveling of Mobile Homes and the repair and refurbishing of Mobile Home foundations. Since Angies list doesn't offer this business category as an option I had to list other categories that got close.


Eco Concrete Design

No reviews yet

Eco Concrete Design

No reviews yet
45 years of experience

Eco friendly & green concrete general contractor with 35+ years experience - in the Portland, Oregon & Washington areas. Handles industrial, commercial & residential projects & any excavation, foundations & flatwork needed.

Eco friendly & green concrete general contractor with 35+ years experience - in the Portland, Oregon & Washington areas. Handles industrial, commercial & residential projects & any excavation, foundations & flatwork needed.

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Earthquake Retrofitting questions, answered by experts

An earthquake retrofit is essential for safety in an earthquake-prone area. Without proper retrofitting, your home is at risk of sliding off the foundation, shifting, or collapsing.

You may also require a retrofit if your home was built before 1980 when building codes began requiring reinforcing, bracing, and bolting for new construction. You may not be eligible for insurance to help pay for earthquake-related damages without a retrofit.

Earthquake gas shut-off valves, or seismic gas shut-off valves, are safety devices that attach to your natural gas line. When an earthquake hits, the valve automatically turns off the flow of gas. Earthquake gas shut-off valves can prevent gas leaks, which are especially dangerous after a quake due to the risk of fire and explosion.

Earthquake retrofitting can increase your home value, making it a great return on investment. This feature is especially valuable in areas prone to earthquakes. Besides the increased safety value (not only for your family but for the next family who moves in), earthquake retrofitting also helps lower homeowners insurance rates. In addition, having your home earthquake retrofitted can make it easier to get a home loan since they are considered lower risk.

Ensure proper ventilation, fix leaks, and schedule regular pest inspections to protect your property.

Even if you invested in the cost of a gas shut-off valve for your oven and other appliances, it’s a good idea to add a seismic shut-off valve as an extra safety measure. 

Gas shut-off valves for appliances are manual, meaning someone has to cut off the flow of gas. This leaves room for error, as you might not be home or might be too distracted to think about gas lines during an earthquake. An earthquake valve is automatic and will protect your home from gas-related disasters in the event of an earthquake.

The Sherwood, OR homeowners’ guide to earthquake retrofitting services

From average costs to expert advice, get all the answers you need to get your job done.

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