12 Most Expensive Home Repairs (and How to Prevent Them)

Roof is Leaking or Pipe Rupture at Home: Panicing Couple In Despair Sitting on a Sofa Watching How Water Drips into Buckets in their Living Room. Catastrophe, Distaster and Financial Ruin

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Roof is Leaking or Pipe Rupture at Home: Panicing Couple In Despair Sitting on a Sofa Watching How Water Drips into Buckets in their Living Room. Catastrophe, Distaster and Financial Ruin
gorodenkoff/istockphoto

Caught in a Fix

Buying a home is part of the American dream. And while grilling outdoors with your family may sound idyllic, there’s a dark side to homeownership: paying for home repairs yourself. And if you didn’t budget for repairs, you could end up ruining your finances. 


Many people don’t know how expensive home repairs can get. So we compiled the 12 biggest potential problems you might face as a homeowner.

Old house foundation wall repair and renovation  with installing metal sheets for waterproofing and protect from rain. Contractors with Foundation repair.
Lex20/istockphoto

Foundation Repairs

The foundation is the bedrock of your home, so if something goes wrong, you probably need to fix it right away. Unfortunately, foundation repairs can also be costly. You can spend as much as $20,000 to fix your foundation


Plus, it can take a while to find a qualified expert. Don’t delay — foundation problems can spread and cause other issues in your home.

roofers installing new roof on house
nycshooter/istockphoto

Roof Replacement

Even a well-built roof doesn’t last forever. And when it’s time to replace it, you might balk at the cost. The final cost will vary depending on the size of your house, materials used, the type of roof and more. You might find yourself spending about $10,000


Thankfully, a good roof can last at least 20 years, so you shouldn’t have to do this very often. Just make sure to take care of any roof problems when they come up so they don’t necessitate a full replacement.

Termite Problems
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Termite Damage

To fully remove termites, you’ll have to tent the house. That can run you about $2,500. But that’s not all. After you tent the home, you’ll have to fix any damage that they’ve done. The cost of that fix will vary significantly. 


Large-scale damage could run you as much as $10,000. However,smaller issues may cost as little as $250. If you start to notice potential evidence of termites, it’s best to take care of it ASAP to prevent further issues.

rewiring a house
ChrisSteer/istockphoto

Electrical Rewiring

If you’re buying an old house, one of the first things you should check for is knob-and-tube wiring. This is an old-school wiring system that can lead to house fires in rare cases. It’s best to get this wiring fixed and replaced if you can. 


Unfortunately, doing so requires opening up your walls and can run you between $10 and $20 per square foot. So if you have a 2,000-square-foot home, it could cost you $40,000 to fix your wiring. Still, it’s better than dealing with a potential house fire.

Installation new HVAC ventilation system, air duct pipeline for construction of a new house
photovs/istockphoto

HVAC

A new HVAC system can be an important home investment. But you’ll have to fork out a whole lot of money to pay for it. A new HVAC can cost between $5,000 and $12,000. 


If you have two AC units, then you might have to replace both of them. The good news is that you should only have to replace your HVAC every 10 to 20 years. Take care of your unit to ensure that it lasts as long as possible.

Water damaged basement
youngvet/istockphoto

Water Damage

Water damage in your home can be especially expensive. That’s because water can damage your floors, walls and more. It can even affect your furniture or appliances, depending on the extent of the problem. 


Repairing water damage can cost about $2,300 on average. However, you might have to pay more — up to $14,000 — if you have a large-scale issue.

An African-American man on a ladder and fixing vinyl siding on a house
Robin Gentry/istockphoto

Siding Repair

If the siding on your home is damaged, you’ll have to repair or replace it. And those costs won’t be cheap. Siding repair can cost about $10,300 on average. The exact cost depends on the materials you use and how much siding needs to be replaced or repaired.

Concrete driveway being poured
stu99/istockphoto

Driveway Repairs

When you think about what can go wrong with your home, your driveway is probably the last place you think of. But a cracked driveway can become a huge eyesore. And depending on the materials, it can be an expensive fix. You can spend between $1,000 and $3,600 to repair your driveway.

Plumber Pipe and Adjustable Wrenches on Water Heater Gas Line
BanksPhotos/istockphoto

Water Heater Replacement

There’s nothing worse than turning on the shower to discover there’s only cold water coming out. That means you might need a new water heater. Unfortunately, it’ll cost you. 


A new water heater can run you more than $1,000, while repairs can cost about $500. Water heaters can last between six and 15 years if they’re taken care of properly. Make sure to flush yours on a regular interval to keep it running smoothly.

pumping septic tanks from the backyard tank in the countryside
Artur Henryk Bialosiewicz/istockphoto

Septic System

If your septic system starts to fail, you’ll probably need to replace it. And that’s when your issues may start. Repairing a sewer line can cost between $2,000 and $3,000. However, if you need an entirely new septic tank, then you’re looking at a total closer to $10,000. 


Before buying a home, make sure to get your septic line inspected. If the inspection turns up tree roots or other issues in the line, see if you can get a credit to cover any needed repairs.

worker installing new plastic pvc window
ronstik/istockphoto

Window Replacement

If you’ve never had to replace a window, you’re lucky. Nowadays, replacing even a few windows can cost thousands of dollars. Need to replace the windows in your whole house? You could be spending tens of thousands of dollars. 


Costs vary depending on size and if you can buy standard windows or need to go custom. And while there are some rebates and credits available for energy-efficient windows, they aren’t enough to offset most of the cost.

Mold on wallpaper in rooms after renovation due to moisture
Andrey Zhuravlev/istockphoto

Mold Remediation

If you discover mold in your home, you’ll want to get it fixed ASAP. Living with mold can cause a variety of health issues, especially for those who are already immunocompromised. 


Unfortunately, mold remeditation — or removing the mold — can cost you a pretty penny, up to $7,000. Plus, once you identify the source of the mold, you may have to pay more to fix that as well. You may also have to address damage caused by the mold. Mold can be an insidious and can get into items you may not even realize.