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>

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>

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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: How do I prevent future damage?

• <div><p>Ensure proper ventilation, fix leaks, and schedule regular pest inspections to protect your property.</p></div>

Q: How effective is earthquake retrofitting?

• <div><p>A home with proper earthquake retrofitting can sustain minimal damage in earthquakes of <b>up to 7.0 magnitude</b>, although risks are higher based on how close and deep the earthquake is. A home closer to the earthquake epicenter will sustain greater damage, especially if the earthquake is closer to the surface of the Earth, but retrofitting can help minimize the risk of injuries.</p></div>

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Verified Reviews for Earthquake Retrofitting pros in Shulerville, SC

*The Angi rating for Earthquake Retrofitting companies in Shulerville, SC 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 Shulerville, SC 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 18, 2025

Reviewed in November 2025
These were two of the hardest working gentleman I’ve ever encountered. First off let me start by saying that Sean, the owner of the moving company, was so reassuring and knowledgeable that I could only say let’s do this, and I’m so happy I did!!! His movers were on time, respectful, reassuring,...
S&B Solutions LLC
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Reviewed in June 2025
I have a very positive experience on this platform. Contractors responded quickly.
Elegance Flooring
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Reviewed in October 2024
We recently had Storm Guard Roofing work on our home, and we couldnâ t be happier with the experience. Scott, the owner, was on-site every single day to give us detailed project updates, which was incredibly reassuring. The crew was not only professional but also very kind and respectful. Every...
Storm Guard Roofing and Construction
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Reviewed in February 2023
The quality of the work exceeded expectations. In addition to interior painting, they provided some exterior carpentry and general repairs. The team showed up on time and well prepared. The work was completed in a single day. Their pricing was fair and competitive. I would definitely hire them...
DK Contracting, LLC
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Reviewed in December 2022
This is by far the best company I have ever felt with!! Tiger was extremely professional and very thorough. I would recommend them to everyone. 5+ rating
Thrift Appliance Repair and Service
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Reviewed in August 2022
Great. I scheduled an appointment quickly. Professional service from everyone I dealt with. They took the time to listen and to answer my questions.
Palmetto Environmental Solutions
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Reviewed in July 2022
Virtus Mechanical was a dream to work with- timely, professional, and communicative. Julian got our problem taken care of and we are so thankful. We will definitely be calling him with any future air conditioning needs. Thank you!
Virtus Mechanical
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Reviewed in February 2021
I have used these guys on 2 separate properties over the past 5 years. They are top notch, dependaple, and respectable. They do what they say, and their installation work is excellent. They stand behind their work. They can solve problems inherent in retrofitting new HVAC into existing...
Carolina Air Care Heating and Air, LLC
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Reviewed in March 2016
When I orginally hired him, he came out and took care of our problem. HOWEVER, i tried to contact him again and he NEVER would respond back. He totally ignore calls and emails. That is UNACCEPTABLE.
X Spurt Seamless Gutters
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Reviewed in September 2013
Thanks to everyone at Strock Design & Remodel. Your service was friendly, efficient and professional and the job was done in a very timely manner. They took great care of me on short notice which was very much appreciated. This will be a company that I will definitely use again and recommend...
STROCK ENTERPRISES DESIGN & REMODEL
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Earthquake Retrofitting questions, answered by experts

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.

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.

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

A home with proper earthquake retrofitting can sustain minimal damage in earthquakes of up to 7.0 magnitude, although risks are higher based on how close and deep the earthquake is. A home closer to the earthquake epicenter will sustain greater damage, especially if the earthquake is closer to the surface of the Earth, but retrofitting can help minimize the risk of injuries.

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 Shulerville, SC 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
•
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.
Timothy Moore
•
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
•
Oct 22, 2025Oct 22, 2025
How Much Does It Cost to Repair Earthquake Damage? [2025 Data]
Discover how much it costs to repair earthquake damage. Learn about average costs, key factors, and ways to save on earthquake repairs for your home.
Stephanie Mickelson
•
Jul 23, 2024Jul 23, 2024
Who Should I Hire for Earthquake Retrofitting?
If you live in an older home in an area prone to seismic activity, you likely need to hire a seismic retrofitting company to protect your home from earthquakes.
Mary Beth Eastman
•
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.
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.