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  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon13
    Verified earthquake retrofitting services reviews

Find Earthquake retrofitting specialists in Woodland

Avatar for J.S. Chappell LLC

J.S. Chappell LLC

New on AngiNew on Angi
Approved Pro

J.S. Chappell LLC

New on AngiNew on Angi
Approved Pro
3 years of experience
Free onsite estimate

We offer a full service one stop shop… From Dust to drapes we cover everything in between. We are leaders in Residential New Construction and Home Renovations, New Development, Decks, Sheds, Shops, Additions. Our services also include our Commercial Remodeling side, no job too big or to small we’re here to be a pillar in our community and grow in the right direction. We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

We offer a full service one stop shop… From Dust to drapes we cover everything in between. We are leaders in Residential New Construction and Home Renovations, New Development, Decks, Sheds, Shops, Additions. Our services also include our Commercial Remodeling side, no job too big or to small we’re here to be a pillar in our community and grow in the right direction. We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumers needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.


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
82 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


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.


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.


Williams Boys Inc.

5.00(
2
)

Williams Boys Inc.

5.00(
2
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

I value all of my customers & follow all of my projects from start to completion to ensure rigid quality standards, I believe in doing things right the first time. I generally handle projects on my own, sometimes with a helper. When I have a larger project, I have a solid network of contractors that I sub-contract with. I generally request approximately 50% down payment on most jobs for new customers, but that can vary depending on project scope, materials, etc.., remainder + tax due upon completion. At this point I accept cash or check. I estimate projects, or charge time & materials. I value communication with my customers to ensure everyone's needs are being met & we're all on the same page. I have a $200 minimum charge which covers the first 2 hours on your job, then it's $50/hr from there on. The minimum charge ensures overhead is met on any job. Crawl space & attic work incur extra charges. Welding & metal fab is billed at a higher rate, depending on the project. I guarantee all of my work & proudly stand behind my ethics & performance. You can always find someone cheaper, but why pay for something twice? Get it done by a qualified person, done right the first time.

I value all of my customers & follow all of my projects from start to completion to ensure rigid quality standards, I believe in doing things right the first time. I generally handle projects on my own, sometimes with a helper. When I have a larger project, I have a solid network of contractors that I sub-contract with. I generally request approximately 50% down payment on most jobs for new customers, but that can vary depending on project scope, materials, etc.., remainder + tax due upon completion. At this point I accept cash or check. I estimate projects, or charge time & materials. I value communication with my customers to ensure everyone's needs are being met & we're all on the same page. I have a $200 minimum charge which covers the first 2 hours on your job, then it's $50/hr from there on. The minimum charge ensures overhead is met on any job. Crawl space & attic work incur extra charges. Welding & metal fab is billed at a higher rate, depending on the project. I guarantee all of my work & proudly stand behind my ethics & performance. You can always find someone cheaper, but why pay for something twice? Get it done by a qualified person, done right the first time.


Construction Creations

No reviews yet

Construction Creations

No reviews yet
28 years of experience

Construction Creations has been serving the Portland Metro area since 1997. We are a small but capable company.With considerably less overhead we can charge less than the big waterproofing companies. We take pride in doing your project on time and on budget while maintaining the highest level of respect for your home or business.We do free in home inspections, and estimates. 25% down and final payment due after satisfying all your needs. Give us a call. I'm confident we are the company your looking for.

Construction Creations has been serving the Portland Metro area since 1997. We are a small but capable company.With considerably less overhead we can charge less than the big waterproofing companies. We take pride in doing your project on time and on budget while maintaining the highest level of respect for your home or business.We do free in home inspections, and estimates. 25% down and final payment due after satisfying all your needs. Give us a call. I'm confident we are the company your looking for.

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Earthquake Retrofitting questions, answered by experts

Almost all new buildings in California need an earthquake shut-off valve. The requirements for an earthquake gas shut-off valve (and who can install it) depend on where you live. For example, according to the Los Angeles Municipal Code, you’re required to hire a licensed contractor to install one whenever you build, sell, or renovate a home. Check with your local building department for your city’s laws on installing, permitting, and inspecting earthquake shut-off valves.

Hearing or feeling vibrations in your house can be unsettling, but there are a few possible causes for a vibrating noise in your wall or floor. Light bulbs and fixtures, circuit breakers, loose pipes, or faulty wiring could all cause vibrations. If you’re not sure what’s causing the vibrations, you can call a contractor to assess your home and narrow down the cause.

Many homeowners want to know whether earthquake retrofitting is tax deductible. Because it’s often considered a capital improvement, you usually can’t deduct it. In some cases and locations, you may qualify for tax incentives, but you’ll need to talk to a tax professional or the Internal Revenue Service (IRS) about your specific circumstances. You may also be able to find grant money for seismic upgrades, which can lower the cost of your insurance premiums and save money over time.

Grounding is a great first step to prevent electrical shock, but you can take it further with GFCI outlets and AFCIs (arc fault circuit interrupters). In particular, AFCIs help protect against the type of electrical arcs that cause fires, like if a mouse chews on a wire or your laptop starts overheating at the wall. These are required in some areas of your home.

Costs vary as much as timelines. The average earthquake retrofit costs between $3,500 and $8,700. However, homes on hillsides, large homes, and those with rooms over garages can cost up to $12,000 or more. Make sure to get a few estimates to compare the cost and services.

The Woodland, WA homeowners’ guide to earthquake retrofitting services

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

What do you need done? We’ll find top pros.
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