How to know if your Building is at risk of earth quake in LA

Last Updated on March 9, 2026

Understanding Your Foundation in Southern California

Welcome to Luxdevla.com! If you live in Southern California, you already know that the ground beneath our feet likes to shift and dance from time to time. Living in the San Fernando Valley, I have seen firsthand how important it is to be prepared. Now, you might be asking yourself why I am writing about this topic. I am a dedicated perio dentist serving Northridge and the surrounding areas, including Chatsworth, Porter Ranch, and Granada Hills. My entire professional life revolves around protecting foundations—specifically, the foundation of your smile, which includes your gums and jawbone.

Interestingly, the structural integrity of a building and the structural integrity of your teeth have a lot in common. Both rely on a solid, healthy base to withstand the unexpected stresses of life. Just as I help my patients rebuild and protect their smiles from periodontal disease, I want to help my local community understand how to protect their homes. Today, we are going to dive deep into how to know if your building is at risk during an earthquake in LA, and what you can do to keep your property—and your family—safe and secure.

The Reality of an Earthquake in LA

We love Los Angeles for its beautiful weather, diverse culture, and stunning landscapes. However, those same beautiful mountains and valleys were formed by tectonic plates pushing against each other over millions of years. This tectonic activity means that living with earthquakes is simply part of the Southern California lifestyle.

It is easy to forget about earthquake preparedness when the ground is still, but the data reminds us to stay proactive. According to the United States Geological Survey, Southern California experiences roughly 10,000 earthquakes every single year. Fortunately, the vast majority of these tremors are so incredibly small that we never even feel them. But this constant seismic activity is a great reminder that our homes and buildings need to be strong, flexible, and up to code.

Being prepared is not about living in fear; it is about empowerment. When you know the facts about your building’s structural integrity, you can take positive, proactive steps to ensure your safety. Let us look at the most common signs that your building might need a little extra support to weather the next big shake.

Visual Signs Your Building Might Be at Risk

You do not have to be a structural engineer to spot some of the basic warning signs that your home or apartment building might be vulnerable. By taking a walk around your property, you can identify a few key features that indicate a higher risk level.

• The Age of the Building: Building codes in Los Angeles changed significantly after major seismic events. If your home was built before 1978, it might not be bolted to its foundation. Homes built before the 1990s often lack the modern shear walls required by current codes.
• Soft-Story Structures: This is a very common architectural style in Los Angeles, especially for apartment complexes. A soft-story building usually has living spaces built directly over open parking spaces or carports, supported only by thin posts. Because the ground floor is essentially “hollow,” it is much more likely to collapse during a major tremor.
• Cripple Walls: Look under your house if you have a raised foundation. The short wood-framed walls that form the crawl space between the ground and the first floor of your house are called cripple walls. If these walls lack plywood bracing (shear panels), they can easily shift and cause the house to slide off its foundation.
• Unreinforced Masonry: Brick buildings are beautiful and historic, but if they were built without steel reinforcing bars inside the brickwork, they are highly brittle. During heavy shaking, unreinforced brick can easily crack and crumble.
• Visible Cracks in the Foundation: While tiny hairline cracks are normal as concrete settles, large, diagonal, or stair-step cracks in your foundation walls are a sign of structural weakness that should be evaluated immediately.

Seismic Risk by Building Type

To help you visualize the potential risks associated with different types of construction in Los Angeles, I have created a straightforward chart. This illustrates the relative vulnerability of various building styles during a severe seismic event before any retrofitting has been done.

Why a Northridge Perio Dentist Cares About Your Foundation

As I mentioned earlier, you might be wondering why a perio dentist at Luxdevla.com is talking to you about foundation bolting, shear walls, and tectonic plates. The truth is, my approach to health and my approach to community safety are deeply connected. In dentistry, particularly in periodontics, we focus entirely on the structures that hold your teeth in place.

Think about it this way: the beautiful crown of your tooth is like the beautiful living room in your house. It is what everyone sees. But if the roots of your teeth, your gums, and your alveolar bone (the jawbone) are weak or infected, that beautiful tooth is at risk of being lost. Just like a beautiful house is at risk if its concrete foundation is crumbling.

Periodontal Disease: The Silent Earthquake in Your Mouth

For many of my patients in Northridge, Reseda, and the greater San Fernando Valley, periodontal (gum) disease acts like a slow-moving earthquake. It begins silently. Plaque and tartar build up below the gumline, slowly causing inflammation. Over time, this inflammation destroys the supporting bone. You might not feel any pain until the foundation is severely compromised and the teeth become loose.

If you wait for an earthquake in LA to test your home’s foundation, you might face catastrophic damage. Similarly, if you wait until your teeth are loose to visit your local perio dentist, the damage to your oral foundation might already be severe. Preventive care is everything. Regular dental checkups and deep cleanings (scaling and root planing) are the equivalent of sending an inspector out to check your home’s foundation. We find the small cracks and weaknesses before they turn into major structural failures.

Retrofitting Your Smile

When an LA building is deemed unsafe, it requires seismic retrofitting. Contractors come in, add steel bolts, reinforce the concrete, and build shear walls to anchor the structure firmly to the earth. As a periodontist, I perform similar “retrofitting” procedures for your mouth every single day!

If you have lost bone density around your teeth due to gum disease, I use advanced techniques like bone grafting to rebuild that foundation. If a tooth has completely lost its structural integrity and needs to be extracted, we can place a dental implant. A dental implant acts just like a steel anchor bolted directly into a home’s foundation. It integrates with your natural bone, providing a rock-solid base for a brand-new tooth. My goal is to ensure that when life’s stresses hit, your smile remains totally unshakeable.

Step-by-Step Guide to Checking Your Los Angeles Property

Now that we understand the importance of strong foundations—both for our homes and our health—let us discuss exactly how you can check if your building is structurally sound and up to modern safety standards. The City of Los Angeles has made great strides in transparency and public safety, offering several resources for homeowners and renters alike.

1. Check the ZIMAS Database: The City of Los Angeles provides an incredible online tool called ZIMAS (Zone Information and Map Access System). By entering your address into this public database, you can find out exactly what year your home was built, its zoning codes, and whether it falls into any specific seismic hazard zones, such as a liquefaction zone or a landslide area.
2. Understand the Local Retrofit Programs: Following major seismic events, local governments took aggressive action. A few years ago, the city rolled out a massive initiative to secure vulnerable housing. In fact, under the Los Angeles Seismic Retrofit Ordinance, the city identified roughly 13,500 soft-story buildings that mandated structural upgrades to remain safe. If you live in an apartment building with parking on the ground floor, you can check with the Los Angeles Department of Building and Safety (LADBS) to see if your building has completed its required retrofitting.
3. Hire a Professional Structural Engineer: If you own a single-family home in the San Fernando Valley that was built before the 1990s, the absolute best step you can take is to hire a licensed structural engineer or a specialized foundation contractor. They will crawl underneath your home to check if your sill plate is securely bolted to the concrete foundation and whether your cripple walls need plywood reinforcement.
4. Secure the Interior of Your Home: Retrofitting isn’t just about the concrete below you. A huge part of earthquake safety involves securing heavy items inside your home. Make sure your water heater is strapped to the wall studs (this is required by law in California). Use heavy-duty brackets to secure tall bookcases, dressers, and televisions to the walls.

For more incredibly detailed and scientific information regarding our local fault lines and historical seismic data, I highly recommend reading the United States Geological Survey (USGS) report on the Northridge quake. Because of our shared history here in Northridge, understanding the lessons learned from 1994 helps us build a much safer future.

Strengthening Our Community Together

Living in Los Angeles is a beautiful experience, and dealing with the reality of an earthquake in LA is simply the price of admission for our gorgeous coastal and valley landscapes. Taking the time to understand your building’s risk level is one of the most responsible and positive things you can do for yourself and your loved ones. By identifying weaknesses, hiring the right professionals, and completing necessary retrofits, you buy yourself profound peace of mind.

At the end of the day, everything in life relies on a solid foundation. Whether you are bolting your vintage mid-century home to its concrete base to protect it from tectonic plates, or visiting Luxdevla.com to restore the bone and gums that support your beautiful smile, proactive care is the key to longevity. As your local Northridge perio dentist, I am passionate about keeping our community strong, healthy, and smiling brightly through whatever comes our way. Take the time to evaluate your home’s foundation this week, and don’t forget to give your oral foundation the same level of care and attention. Stay safe, stay prepared, and keep smiling!