How much does it cost to retrofit my house?

Earthquake retrofitting a house is done to prevent displacement from the structures concrete foundation. This makes a building safer and prevents the probability of more damage during an earthquake. Homes need to be retrofitted because construction techniques have greatly improved and the effects of earthquakes on structures are better understood now than when most homes were built. Whereas there’s no such thing as a typical price for earthquake retrofitting a home, the common value is typically regarding 1 to 3% of the home’s total price. Larger homes, those that were built and designed on hillsides, and people with basements or rooms over garages can generally price additional to retrofit and should even cost $10,000 or even a bit more


Why Retrofitting is critical

Any home that’s twenty five years or older can be retrofitted due to the fact that new understandings of the results of earthquakes on buildings. Homes in-built the 1990’s or later usually have already got earthquake-resistant options put in throughout construction. It’s imperative that house owners who live in an active seismal zones have their homes retrofitted to stop harm and injury. The method will improve a home’s ability to keep residents safe throughout an earthquake and houses that are habitable once a serious disaster. Additionally, retrofitting can greatly scale back repair prices once a seismal event occurs and it will even stop harm entirely. Finally, retrofitting a home can scale back earthquake insurance premiums, that have increased dramatically in recent years. Moreover, most of those insurance benefits have also conjointly decreased, creating it much more risky than ever to not retrofit a home.


Common Steps in Retrofitting

A professional has to confirm which kind of retrofitting would be best for every home, looking on many factors.

Common solutions include:

Cripple Wall Bracing

Many structures in southern california are designed on cripple walls. Structural engineers build cripple walls that are short walls, that rest on a home’s foundation and support the ground and exterior walls. Once these walls aren’t braced, they will shift throughout Associate in Nursing earthquake. Once this happens, the likelihood of severe harm and injury to people within the home greatly will increase. Bracing cripple walls strengthens structures by increasing stability, and also the method usually helps minimize harm on homes. the typical value of bracing a 2-foot high wall is regarding $1.50 per linear foot.


Foundation Bolting

Houses that aren’t bolted to their foundation might move throughout Associate in Nursing earthquake. Homes that move off their foundation can also cause gas lines to rupture, which can cause fires. The price of foundation bolting might vary. However, costs usually vary from $250 to $5,000. the price of repairing a foundation once Associate in Nursing earthquake could also be $25,000 or a lot of. The bolting process requires that holes are drilled through the sill plate on a foundation and anchor bolts are put in. Sometimes, there isn’t enough space to drill, and steel plates will have to be compelled to be connected. These bolts should be properly put in to be effective.


Anchoring to Mud Sill

The wood on top of the foundation of a house is referred to as the mud sill. Before the 1950’s, mud sills were not bolted to a homes foundation. This creates a large structural weakness in the building. The building will slide off its foundation throughout an earthquake. Homes ought to be anchored to the mud sill in accordance with Uniform Building Codes, which needs bolts to be placed on each side six feet. Anchoring structures to the mud sill usually prices concerning $200 to $500 and may forestall thousands of bucks in damages.

Earthquakes occur suddenly and swiftly. The motion on the earth’s crust will cause severe injury to homes. Older structures are particularly in danger as a result of being built without the engineered to resist shaking and moving. Strengthening homes might greatly cut back or fully eliminate injury to a home throughout these varieties of natural disasters, and it’s going to additionally prevent injury and even death.


Additional concerns and prices

In some cases, particularly older homes or homes that have been remodeled, a consultation with an engineer is usually recommended. This could even be a decent method for homes in distinctive locations, like on hillsides or stilts, giant homes, or homes with existing problems. On average, an engineer consultation will add another $150 – $300 to your prices. Because retrofitting a home will substantially change the home’s structure, permits are needed in most areas. Check with your contractor for native codes and rules. Many insurance firms supply a lower rate on earthquake coverage once a house is retrofitted. In several areas, including parts of california, it will save 5% off standard earthquake coverage rates. Homes engineered before 1980 had completely be different in foundation rules, typically without quality bolting techniques. These unbolted foundations generally lead to water in between the mudsill and also the foundation, oxidization in the bolts and creating them less effective. If this is often the case in your home, your foundation bolting process will be additional in depth as a result of this foundation is almost unconnected to the house, which may raise the worth by up to half-hour. Retrofitting a brick foundation isn’t suggested by most professionals because of the unsteady nature of bricks throughout an earthquake. If you’ve got a brick foundation, you’ll possibly have to replace it with a concrete version before earthquake modifications may be created. This generally prices $5-$8 per area unit.


Enhancement and improvement prices

Because retrofitting a home may be AN invasive and mussy method, it may be a decent time to update wiring, plumbing, or HVAC systems.Adding a seismal review to envision what different areas of the house need retrofitting will add $200-$400 to the whole price.



Don’t wait until an earthquake has agitated your home to its core. The best time for a sesimic retrofit in Los Angeles is now. In fact, all those small earthquakes that you just don’t feel, are wreaking havoc as we speak. We will offer you an estimate on the price of retrofitting to better assist your budget. However, peace of mind is worth so much more than dollar signs.

Call us at 888-997-6518 or email us at to receive information and protect your family from the possible dangers of an earthquake.