Filling In a Swimming Pool: Costs, Risks, and the Right Way to Do It

Filling in an inground swimming pool is a major undertaking that, if done incorrectly, can lead to severe structural damage to your property and cost tens of thousands of dollars in repairs. Rushing the process or hiring an unqualified contractor are the most common and costly mistakes. To avoid issues like soil settlement, drainage problems, and a decreased home resale value, homeowners must prioritize proper permits, professional demolition, and correct soil compaction techniques. This guide outlines the critical steps and potential pitfalls of pool removal.

What Are the Risks of Improperly Filling a Pool?

The primary risks stem from failing to prepare the pool structure and the surrounding soil correctly. When a pool is simply filled with dirt without being structurally compromised first, it can lead to long-term instability. John Uhe, a pool industry expert, warns of potential ground collapse and unstable foundations.

The weight of the soil and water absorption can cause the empty pool shell to shift or crack over time. This often results in:

• Sinkholes: Voids can form beneath or around the filled area as the soil settles unevenly.
• Drainage Issues: An improperly graded plot can redirect water toward your home's foundation, leading to basement flooding and foundation cracks.
• Safety Hazards: If buried plumbing or electrical lines are not properly capped and removed, they pose a future risk to anyone digging in the area.

Why Are Permits and the Right Contractor Essential?

Skipping the permit process is a significant error that can haunt you later. Most municipalities in the U.S. require a permit for pool removal to ensure the work meets local building codes and safety standards. Failing to obtain permits can result in fines and major complications when you try to sell your home, as the unpermitted work may be discovered during the buyer's inspection.

Hiring the right contractor is equally critical. Look for a licensed and insured professional with specific experience in pool demolition, not just general landscaping. A qualified contractor will understand the necessary steps, including:

• Proper Demolition: Breaking up the pool's concrete or fiberglass shell to prevent it from holding water and becoming a floating hazard.
• Selecting the Right Fill Material: Using clean, compactable fill dirt, not organic topsoil or construction debris.
• Engineered Compaction: Systematically compacting the soil in layers, or "lifts," to minimize future settlement. This is a technical process that prevents the ground from sinking years after the project is complete.

How Does a Bad Pool Fill Job Affect My Home's Value?

A poorly executed pool removal can significantly impact your property's resale value. Prospective buyers and their home inspectors will be wary of any signs of ground settlement or unpermitted work. If the ground is visibly uneven or drainage problems are evident, it can deter buyers or lead them to demand a substantial price reduction to cover the cost of repairing the work. Essentially, a cheap, quick fill job now can cost you far more than the price of proper removal when it comes time to sell.

What Is the Standard Process for a Proper Pool Removal?

Based on industry standards, a proper pool fill-in involves a multi-step process designed for long-term stability:

1. Permit Acquisition: Your contractor should pull the required local permits before any work begins.
2. Utility Disconnection and Removal: All gas, electrical, and plumbing lines connected to the pool must be professionally capped or removed.
3. Demolition: Holes are punched in the bottom of the pool shell for drainage, and the walls are broken up. In some cases, a partial removal (breaking only the top of the walls) is an option, but a full removal is often recommended.
4. Backfilling and Compaction: The pool is filled with clean fill dirt in stages. After each 12- to 18-inch layer is added, it is mechanically compacted. This is the most crucial step to prevent future settlement.
5. Final Grading: The area is graded to slope away from your home’s foundation to ensure proper water drainage.

The decision to fill in a pool should not be taken lightly. The most practical advice is to invest in a qualified contractor who follows local building codes and prioritizes proper engineering techniques over speed. Cutting corners on this project is a guaranteed way to create a more expensive problem for your future self.