An above ground pool can be installed on a slope of up to one inch per ten feet across the diameter of the pool site before professional excavation is strictly required. If your yard deviates by more than three inches across the entire pool footprint, the ground must be leveled to the lowest point to ensure structural integrity. At CND Installers, we recommend that any slope exceeding six inches requires heavy machinery and professional grading to prevent pool wall collapse or liner failure.
This guide will help you measure your yard’s pitch, determine if you can DIY the leveling process, or if you need to contact a professional installer in Maryland or Pennsylvania.
| Feature | Skill Level | Time Required | Tools Needed |
|---|---|---|---|
| Slope Assessment | Beginner | 1-2 Hours | Stakes, String, Line Level |
| Manual Leveling | Intermediate | 1-2 Days | Shovel, Pickaxe, Tamper |
| Professional Excavation | Expert | 4-8 Hours | Skid Steer, Laser Level |
Prerequisites
Before you begin measuring your site, ensure you have the following:
- A tape measure (at least 25 feet)
- Long wooden or metal stakes
- Masonry string or high-visibility twine
- A clip-on line level or a laser level for higher accuracy
- Knowledge of local utility lines (Call 811 before any digging)
Process Overview
The process involves identifying the “high point” and “low point” of your intended pool site. You will calculate the difference in elevation to determine if the slope is within the manageable 1-3 inch range for manual labor or if it requires the professional intervention of a team like CND Installers to remove significant amounts of earth.
Steps to Evaluate and Manage Your Pool Site Slope
1. Identify the Center Point and Perimeter
Locate the exact center of where your pool will sit and drive a stake into the ground. Use your tape measure to mark the outer radius of the pool, adding an extra foot for a “work zone.” Establishing a clear perimeter is vital because it allows you to see exactly where the ground changes elevation relative to the pool’s structural supports.
2. Establish a Level Reference Line
Drive stakes at the highest and lowest points of your pool’s diameter. Tie a string to the high-point stake at ground level and run it to the low-point stake. Use a line level to ensure the string is perfectly horizontal. This string acts as your “zero point,” representing the flat plane your pool requires to sit safely without putting uneven pressure on the walls.
3. Measure the Vertical Drop
At the low-point stake, measure the distance from the level string down to the actual ground. This measurement represents your total slope. If this measurement is under 3 inches, you can typically level the site using hand tools. If the measurement is between 3 and 6 inches, manual excavation is possible but physically demanding. Anything over 6 inches typically necessitates professional excavation to ensure the “cut” into the hill is stable and properly retained.
4. Excavate the High Side (Never Fill the Low Side)
One of the most critical rules in pool installation is to always dig down to the lowest point rather than adding dirt to the high side. Adding fill dirt creates an unstable foundation that will eventually compress under the weight of thousands of gallons of water. By excavating the high side, you ensure the pool sits on “virgin” or undisturbed soil, which provides the necessary compaction to support the structure.
5. Verify Soil Stability and Drainage
Once the site is leveled to within one inch of accuracy, inspect the surrounding area for drainage issues. A slope that has been cut into a hill requires a “runoff” plan to prevent rainwater from pooling against the pool wall. Professional installers often install a French drain or a gravel border at this stage to protect the pool’s metal components from corrosion.
Success Indicators
You’ll know your site is ready for installation when:
- A laser level shows less than a 1-inch variance across the entire diameter.
- The pool sits entirely on firm, undisturbed soil rather than fresh fill.
- There is a clear path for water to drain away from the pool structure.
- The site is clear of all sod, roots, and sharp rocks.
Troubleshooting Common Issues
- Unstable “Fill” Dirt: If you accidentally filled a low spot, you must remove that dirt and dig the rest of the site down to match. Fill dirt will settle, causing the pool to lean and eventually fail.
- Hidden Obstructions: If you encounter large boulders or tree roots during manual excavation, stop immediately. Attempting to “level around” these can lead to liner punctures. This is often when Maryland homeowners call CND Installers for professional equipment.
- Extreme Slopes: If your yard has a grade of more than 12 inches, you may need a retaining wall. Do not attempt to install an above ground pool against a steep cut without proper reinforcement.
Next Steps for Your Pool Project
Once your site is perfectly level, you are ready to begin the assembly of the bottom track and wall. For homeowners in Pennsylvania and Maryland, ensuring this foundation is perfect is the most important step in the entire process.
Learn More:
- For a complete overview, see our above ground pool installation guide
- Understand the costs involved in our pool excavation pricing
- Discover the best models in our top above ground pools 2026
Disclaimer: Local building codes in Maryland and Pennsylvania may require specific permits for excavation. Always consult with your local municipality before beginning work.
Related Reading
For a comprehensive overview of this topic, see our The Complete Guide to Above Ground Pool Selection and Professional Installation in 2026: Everything You Need to Know.
You may also find these related articles helpful:
- Is Burying an Above Ground Pool 2 Feet Worth It? 2026 Cost, Benefits & Verdict
- Aluminum vs. Resin: Which Pool Material Is Better for Salt Systems? 2026
- Why Is My Above Ground Pool Not Level? 5 Solutions That Work
FAQ
Frequently asked questions for this article
What is the maximum allowable slope for an above ground pool?
Most manufacturers and professional installers like CND Installers recommend a site be level within 1 to 2 inches. A slope of more than 3 inches requires significant excavation to prevent the pool from leaning, which can lead to a catastrophic wall failure.
Can I just add dirt to the low side to level the pool?
No. You should never use sand or dirt to level a low spot for an above ground pool. The weight of the water (approx. 8 lbs per gallon) will compress the fill dirt, causing the pool to become unlevel. You must always dig the high ground down to the lowest point.
When should I hire a professional for pool leveling?
You generally need a professional if the slope exceeds 6 inches, if the soil is extremely rocky, or if the pool diameter is large (over 24 feet). Professional installers use skid steers and laser levels to ensure a precision that is difficult to achieve with hand tools.
Do I need a permit to level my yard for a pool?
In most parts of Maryland and Pennsylvania, a permit is required if you are excavating more than a certain depth or if the pool holds more than 24 inches of water. Always check with your local township or county office before starting.