How much does it cost to retrofit a house for earthquakes?

• <div><p>Costs vary as much as timelines. The average <a href="https://www.angi.com/articles/how-much-does-earthquake-retrofitting-cost.htm">earthquake retrofit costs</a> between <b>$3,500 and $8,700</b>. 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.</p></div>

Are seismic gas shut-off valves required in California?

• <div><p>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 <a href="https://codelibrary.amlegal.com/codes/los_angeles/latest/lamc/0-0-0-186081">Los Angeles Municipal Code</a>, 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.</p></div>

Top-rated earthquake retrofitting specialists.

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Q: How long does an earthquake retrofit take?

• <div><p>Projects will vary based on size and scope, but an average earthquake retrofit takes between <b>two weeks and two months</b>. This includes the initial evaluation and plan, bidding and contract paperwork, permitting and approval process, actual work, and final inspection. Your contractor should give you a more accurate time estimate for your specific project, and they may be able to estimate how long the permitting process will take for your area.</p></div>

Q: What Is a gas shut-off valve for earthquakes?

• <div><p>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.</p></div>

Q: Can I DIY an earthquake retrofit?

• <div><p>It is not advisable to try to retrofit your home without the expertise of a professional. These projects usually require a consultation with a structural engineer and a plumber for any gas-related adjustments. Working with a professional earthquake retrofitting contractor is the best way to ensure that any structural work done to your home will help protect you and your family. </p></div>

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Verified Reviews for Earthquake Retrofitting pros in Firth, ID

*The Angi rating for Earthquake Retrofitting companies in Firth, ID is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Earthquake Retrofitting needs.

*The HomeAdvisor rating for Earthquake Retrofitting companies in Firth, ID is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Earthquake Retrofitting needs.

Last update on December 12, 2025

Reviewed in December 2024
My contractor was amazing getting the work done just like we asked and in a timely manner even with all the other jobs they had going at the time
Revamp Rebuild & Drywall LLC
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Reviewed in November 2024
They did a great job for a great price! I needed my weedy yard tamed and it looks awesome! They were even able to trim the trees! They were able to work around my schedule and were quick and efficient. I will call them again next time I get overwhelmed with yard work.
SCP Mowing LLC.
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Reviewed in November 2024
Very good worker. Showed up early . Stayed until he was done.
THE HOME REJUVENATOR LLC
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Reviewed in July 2024
Excellent service and very budget friendly! He came very promptly and was very thorough.
Carlos A. Flores
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Reviewed in January 2024
Caleb did such a great job on our deck! he was very nice, courteous, knowledgeable, and professional. 10/10 would recommend. Also, will be using him again for future projects.
Norwood Construction
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Reviewed in November 2023
The quality of workmanship was excellent and showed they took pride in their work. We would not hesitate to refer them to anyone who might be looking for a home renovation team.
White Cross Homes, LLC
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Reviewed in September 2023
very accommodating, extremely professional staff and high quality workman ship
BENTLEY SIDING AND EXTERIORS LLC
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Reviewed in January 2023
I am very pleased with the experiences I have had with Brant Wadworth and Jason Wilson they were very helpfull
Renewal by Andersen of Boise
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Reviewed in June 2022
Jerry and Smith have been amazing to work with. They have an excellent eye for detail, take pride in their work, and work incredibly hard to make sure theyâ re producing a quality product. Should we need any other concrete done, this will be my first and only call. I really canâ t recommend...
Final Aspect Concrete, LLC
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Reviewed in January 2021
Josh did a thorough check of my furnace and gave me options for keeping my home heated.
Advanced Plumbing & Mechanical, LLC
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Earthquake Retrofitting questions, answered by experts

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.

Projects will vary based on size and scope, but an average earthquake retrofit takes between two weeks and two months. This includes the initial evaluation and plan, bidding and contract paperwork, permitting and approval process, actual work, and final inspection. Your contractor should give you a more accurate time estimate for your specific project, and they may be able to estimate how long the permitting process will take for your area.

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.

It is not advisable to try to retrofit your home without the expertise of a professional. These projects usually require a consultation with a structural engineer and a plumber for any gas-related adjustments. Working with a professional earthquake retrofitting contractor is the best way to ensure that any structural work done to your home will help protect you and your family.

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.

The Firth, ID homeowners’ guide to earthquake retrofitting services

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

See all articles

Angi
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Oct 22, 2025Oct 22, 2025
How Much Does It Cost to Repair Earthquake Damage? [2025 Data]
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Dec 3, 2025Dec 3, 2025
How Much Does Earthquake Valve Installation Cost? [2025 Data]
A seismic shut-off valve stops the flow of gas during an earthquake, protecting your home from fires and explosions. Here’s what your earthquake valve installation cost will look like.
Angi
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Nov 4, 2025Nov 4, 2025
How Much Does an Earthquake Retrofit Cost? [2025 Data]
Earthquake retrofit costs vary based on home size, location, and project scope. Learn what impacts your price and how to budget for a safer, more secure home.
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Jul 24, 2024Jul 24, 2024
What You Need to Know About Earthquake Gas Shut-Off Valve Installation
Earthquake gas shut-off valve installation is important for any home in earthquake-prone areas. Explore how they’re installed here.
Mizuki Hisaka
•
Aug 26, 2024Aug 26, 2024
What Is an Earthquake Gas Shut-Off Valve and Do You Need One?
In a seismic event, an earthquake gas shut-off valve could stop gas leaks and save your life. Learn more about its costs, installation, and benefits.
Stacey L. Nash
•
Jul 25, 2024Jul 25, 2024
Earthquake Retrofit 101: Everything You Need to Know About Prepping a Home for a Seismic Event
If you live near a fault line, your home may need an earthquake retrofit. Find out what you need to know about the process, from costs to who you should hire.