Buying a Home

Learn how to spot major home defects and navigate inspections before you buy.

Buying a Home
On this page
  1. Look Past the Staging
  2. The Foundation and Structure
  3. The Roof Over Your Head
  4. Plumbing and Hidden Leaks
  5. Heating and Cooling Systems
  6. Electrical Panels and Wiring
  7. System Lifespans and Replacement Costs
  8. The Home Inspection Process

Look Past the Staging

When you tour a house, it is easy to fall in love with shiny countertops and fresh paint. But staging is just a costume. The real house hides behind the drywall. You are buying the bones. If the bones are bad, that pretty kitchen will not matter.

Paint and carpet are cheap to replace. You can learn more about updating those finishes in our interior paint and drywall guide. But a failing roof or a cracked foundation will drain your bank account before you even unpack. You must learn to spot the big ticket items. This guide will show you what to look for and why it matters.

Pro Tip: Visit a house right after a heavy rain. You will easily spot poor yard drainage, overflowing gutters, and leaks in the basement.

The Foundation and Structure

The foundation holds up everything else. If it shifts or sinks, the whole house suffers. Fixing a foundation is one of the most expensive repairs a homeowner can face. Keep in mind that all cost ranges vary wildly based on your region, the scope of the job, and the age of the home.

Look at the exterior walls. Do you see large cracks in the brick or concrete? Inside, check the basement walls for bowing or horizontal cracks. Horizontal cracks are a huge red flag. They mean the soil outside is pushing the wall inward. You should also check the floors upstairs. If you drop a marble and it rolls fast to one side, the house is settling unevenly. Read more about structural warning signs in our foundation guide.

Here is a look at what different foundation repairs might cost you.

Minor Epoxy Crack Injection$500
Sinking Slab Leveling$3,500
Bracing a Bowed Wall$6,000
Major Foundation Underpinning$15,000+

The Roof Over Your Head

A bad roof lets water into the house. Water destroys wood, drywall, and insulation. Before you make an offer, step back into the street and look up.

Are the asphalt shingles laying flat? If they look wavy, curled at the edges, or are missing entirely, the roof is at the end of its life. Look at the gutters. If they are full of sandy granules, the shingles are breaking down. Inside the house, look at the ceilings on the top floor. Brown water stains mean the roof is already leaking. You can find more details on spotting roof damage in our roofing guide.

Curling and brittle shingles are a sure sign a roof needs replacing soon.
Curling and brittle shingles are a sure sign a roof needs replacing soon.

Plumbing and Hidden Leaks

Water pressure and pipe materials matter. Turn on the shower and flush the toilet at the same time. If the shower drops to a trickle, the house has pressure issues or clogged pipes.

Pay attention to the age of the house. Homes built before 1960 often have galvanized steel pipes. These rust from the inside out and eventually need a total replacement. Homes built in the 1980s might have polybutylene pipes. These gray plastic pipes are famous for bursting without warning. If you see them, plan to replace them. Check our plumbing guide to learn how to identify different pipe materials.

Safety Warning: Never skip a sewer scope. A standard inspector will not check the underground pipe running to the street. Tree roots can crush this pipe, and replacing it costs 3,000 to 10,000 dollars. Pay a plumber 200 dollars to run a camera down the line before you buy.

Heating and Cooling Systems

Furnaces and air conditioners do not last forever. An old system will break down right when you need it most. Find the sticker on the side of the furnace and the outdoor AC unit. It usually shows the manufacture date.

If the system is more than 15 years old, you need to budget for a replacement soon. Turn the system on during your tour. Listen for loud bangs or squeals. A well maintained system should run quietly. Also, look at the ductwork in the basement. If it is covered in duct tape or looks crushed, the system will struggle to heat the house.

An old, neglected AC unit will likely need replacement shortly after you move in.
An old, neglected AC unit will likely need replacement shortly after you move in.

Electrical Panels and Wiring

Bad wiring causes fires. You want to make sure the electrical system can handle modern life. Go to the basement or garage and find the breaker box. Open the door and look at the brand name.

If you see the names Federal Pacific or Zinsco, you have a problem. These older panels are known fire hazards and most insurance companies will force you to replace them. If the house was built before 1950, it might have knob and tube wiring. This outdated wiring lacks a ground wire and is very dangerous. You can learn how to spot these hazards in our electrical systems guide.

System Lifespans and Replacement Costs

Knowing how long things last helps you plan your budget. If you buy a house with a 20 year old roof and a 15 year old furnace, you will spend a lot of money in your first few years. Here are the typical lifespans and ballpark replacement costs for major home systems.

Home System Typical Lifespan Ballpark Replacement Cost
Asphalt Shingle Roof 15 to 25 years $8,000 to $15,000
HVAC (Furnace and AC) 15 to 20 years $6,000 to $12,000
Water Heater 8 to 12 years $1,000 to $2,500
Electrical Panel Upgrade 25 to 40 years $1,500 to $3,000
Main Sewer Line 40 to 60 years $3,000 to $10,000

The Home Inspection Process

Once your offer is accepted, you have a short window to inspect the home. Always hire a licensed, independent home inspector. Do not just use the person your real estate agent recommends without checking their reviews.

Follow the inspector around the house. Ask questions. They will check the roof, foundation, plumbing, electrical, and HVAC systems. They will give you a long report filled with pictures and notes. Do not panic when you see 50 items on the list. Most are minor maintenance tasks. Focus on the big ticket items.

Remember that a standard inspection does not cover everything. You often need separate tests for things like radon gas or mold. You can read more about testing for these issues in our environmental hazards guide. If the inspector finds major defects, use the report to negotiate. You can ask the seller to fix the problem or give you a credit to pay for the repairs yourself.

Always follow your inspector around and ask questions about what they find.
Always follow your inspector around and ask questions about what they find.

Frequently asked

Should I waive the home inspection to get my offer accepted?

You should almost never waive an inspection. If you do, you take on all the risk for hidden damage. A bad foundation or failing roof can cost tens of thousands of dollars to fix.

What fixes are mandatory after a home inspection?

No fixes are legally mandatory for the seller unless specified in your contract. You must negotiate repairs or credits based on the inspection report. If you cannot agree, you can usually walk away from the deal.

Does a standard home inspection cover mold and radon?

Standard inspections usually look for visible signs of water damage, but they do not test the air for mold spores or radon gas. You need to hire specialists and pay extra for those specific tests.

How much does a home inspection cost?

A standard inspection runs between 300 and 500 dollars. The price goes up for larger homes or if you add extras like a sewer scope, radon test, or termite check.

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