A percolation test, also called a perc test, is an essential step when buying or developing land, particularly in locations without access to municipal sewer systems. Did you know that around 20% of properties in the United States rely on septic systems, which require a successful perc test before installation? Understanding “What is a perc test?” can save you time, money, and future headaches with land development projects. This test measures soil absorbs water well, determining whether the land is suitable for a septic system. Steve Daria and Joleigh, renowned real estate investors and cash land buyers, emphasize the importance of knowing all about perc tests before closing on land deals. By gaining clarity on “What is a perc test?” you can make smarter decisions and avoid costly surprises. Curious to learn how a perc test impacts your land purchase plans? Book a free discussion with Steve and Joleigh today to get expert guidance and explore your options!
Key Points
- Definition of a Perc Test: A perc test, or percolation test, checks how well soil absorbs water. This is essential for determining if the land can support a septic system.
- Why It’s Important: Land without proper drainage can fail to meet the requirements for a septic system. A failed perc test could make development difficult or even impossible.
- How It Works: During a perc test, professionals dig holes in the soil and fill them with water. They then measure how long it takes for the water to seep into the ground.
- Where It’s Needed: Perc tests are crucial for rural or undeveloped areas without city sewer systems. They help ensure safe and efficient waste management for new properties.
- Impact on Land Purchases: Passing a PC test can significantly increase a property’s value and usability. Before buying land, always factor in the costs and process of this essential test.
What is a perc test, and why is it important?
A percolation test, or perc test, evaluates how efficiently water drains through soil on a particular piece of land.
This test is crucial for determining whether the property can support a septic system needed in areas without access to a city sewer.
If the soil doesn’t drain properly, wastewater could back up, leading to environmental and health hazards.

A failed perc test could mean the land is unsuitable for building, or you might need costly modifications to make the site usable.
On the other hand, passing the test adds value to the property and makes development easier.
For anyone buying land, knowing “What is a perc test?” helps you avoid unexpected problems and make smarter investment decisions.
Without this test, you could risk buying difficult or impossible land to develop.
Simply put, a perc test protects both your plans and your money by ensuring the land complies with all essential standards for safe, efficient, and effective waste management.
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Can a perc test impact the value of land?
Yes, a perc test can significantly impact the value of land.
When you ask, “What is a perc test?” the answer is simple: It’s a way to determine how well the soil absorbs water, which is particularly important for properties in areas where septic systems are needed.
If the land passes the perc test, it shows that a septic system can function properly, which increases the property’s value and makes it more appealing to buyers or developers.
On the other hand, failing the test can lower the land’s value since it might be difficult or expensive to make the land usable.
A failed test could mean additional costs for soil improvements or alternative waste systems.
Buyers often consider perc test results before purchasing to ensure the land meets their needs.
For sellers, having documentation of a successful perc test can help attract more interest and justify a higher asking price.
Ultimately, the results of “What is a perc test?” play a key role in determining how land is valued and how easily it can be developed.
How is a perc test performed on a property?
1. Choose the Test Location
The first step in performing a perc test is selecting the spot where the septic system will likely be installed.
Professionals usually pick an area with soil that seems well-suited for drainage.
This step is vital because understanding “What is a perc test?” helps ensure the right site is chosen for accurate results.
2. Dig the Test Holes
Holes are dug in the ground, typically about 2 to 3 feet deep, to simulate the area where a septic system would filter wastewater.
The soil from these holes is checked for type and texture to evaluate its ability to drain water.
This hands-on step is key in answering “What is a perc test?” and assessing if the soil meets the requirements.
3. Saturate the Soil
The soil in the test holes is soaked with water to mimic natural conditions and ensure the soil is ready for testing.
This step ensures the test measures how the land will handle consistent water flow over time.
Knowing “What is a perc test?” makes it clear why wetting the soil is so important for accurate results.
4. Measure Water Drainage
Water is poured into the test holes, and the time it takes for the water level to drop is recorded.
These measurements determine how quickly water is absorbed by the soil, which shows its drainage capacity.
This data is critical in deciding if the property is suitable for a septic system.
5. Analyze the Results
Once the testing is done, professionals review the data to see if the land passes or fails the PC test.
If the land passes, it is considered suitable for development; if not, alternative solutions may be needed.
Understanding the results of a PC test helps property owners confidently plan their next steps.

What happens if a property fails the perc test?
If a property fails the perc test, it means the soil does not absorb water well enough to support a traditional septic system.
This can create challenges for landowners or buyers, as it may limit how the property can be used.
Knowing “What is a perc test?” is important because it helps you understand why a failed test can complicate development plans.
Failing the test does not necessarily mean the land is useless, but additional steps may be required.
For example, you might need to invest in soil treatment or install an alternative septic system that is more expensive than traditional ones.
Sometimes, the property can only be used for specific purposes, like farming, rather than building a home.
It’s also possible that permits for development won’t be approved until the issue is resolved.
Ultimately, understanding “What is a perc test?” lets you prepare for these potential outcomes and make informed decisions about land use.
Always consult a professional to explore your options after a failed test.
How much does a perc test typically cost?
- Cost Varies by Location: The price of a perc test can vary depending on where you live. Some areas charge more due to higher labor costs or stricter regulations.
- Average Cost Range: A perc test can cost between $300 and $1,500. The size of the property and the number of test holes required can impact the overall price.
- Additional Costs for Difficult Soil: If the soil is rocky or hard to dig, you may face additional fees. These extra charges cover the extra time and effort needed to complete the test.
- Permit Fees Might Apply: Some local authorities require a permit before performing a perc test. Permit fees can significantly impact the total cost, so it’s wise to research them ahead of time.
- Cost Includes Professional Expertise: The test is often conducted by experienced professionals who understand soil and drainage. Their skill ensures accurate results, making the cost an essential investment in property planning.
What should I prepare before a perc test is conducted?
Before a perc test is conducted, it’s important to prepare both the property and the necessary paperwork.
Start by identifying the ideal spot where the septic system is likely to go, as this will save time during the test.
Clear any debris, brush, or obstacles in the area to make it easy for the professionals to access and perform the test.
You should also check with your local government to see if permits are required beforehand, as some areas require approval before scheduling the test.
Knowing “What is a perc test?” will give you a good understanding of why these steps matter, as they help ensure accurate and reliable results.
Additionally, ensure the property’s boundaries are well-marked to avoid confusion during the process.
If the land has difficult soil, such as rocky or clay-heavy areas, talk to the testing professional about any extra prep work needed.
Budgeting for potential additional costs is also wise, especially if the test site is hard to access.
If you’re unsure where to begin, let expert real estate investors Steve Daria and Joleigh guide you.
Specializing in cash land purchases, they offer valuable insights to simplify the process and make your journey seamless.
Reach out to them today to get expert advice and ensure your land is fully ready for testing!
**NOTICE: Please note that the content presented in this post is intended solely for informational and educational purposes. It should not be construed as legal or financial advice or relied upon as a replacement for consultation with a qualified attorney or CPA. For specific guidance on legal or financial matters, readers are encouraged to seek professional assistance from an attorney, CPA, or other appropriate professional regarding the subject matter.