Common Mistakes When Building an Inground Swim Spa (and How to Avoid Them)

You’ve seen them on Pinterest, those sleek, steamy backyard inground swim spas that look like a millionaire’s version of self-care. So you start dreaming about warm water, built-in jets, and year-round relaxation. But here’s the splash of reality: building an inground swim spa isn’t as simple as dropping one in and calling it a day. One wrong design choice, poor drainage, or a casual “eh, that looks level enough” moment can turn your dream spa into an expensive backyard puddle.

When it comes to installing an inground swim spa in GA, the smallest mistakes can make the biggest waves. Picking the right spot, testing the ground, choosing quality materials, and budgeting for both today and tomorrow are all key steps most homeowners underestimate. So before you grab a shovel or sign a contractor’s quote, let’s walk through the most common mistakes homeowners make when building an inground swim spa and how to dodge them like a pro.

1. Overlooking Site Selection

Picture this: the crew shows up, starts digging, and halfway through someone asks, “Wait, is there a power line under here?” Yikes. Choosing the wrong spot for your inground swim spa can create delays, budget blowouts, and safety risks you do not want to deal with.

Here’s the truth: ground conditions and utility access are not small details; they’re make-or-break factors. If your site doesn’t drain properly or isn’t stable, you could end up with cracking concrete or shifting walls.

Pro Tip: Always consult a pool and spa expert before choosing your location. They’ll assess soil type, slope, drainage, and how your spa fits with your backyard layout. You’re not just picking a spot — you’re setting the stage for years of problem-free relaxation.

Fact: Poor site selection can increase installation costs by up to 25% due to rework and failed inspections.

2. Ignoring Soil Stability

Soil might not sound exciting, but it’s the unsung hero of every successful inground swim spa in GA. Unstable soil can shift and crack, creating leaks or uneven surfaces that cost thousands to repair.

Scenario: You finally fill your spa, step in for the first soak, and realize one side is sinking faster than the other. Not exactly relaxing.

Pro Tip: Have your contractor perform a soil test before breaking ground. It’s a simple step that can save you a world of trouble. If the soil is too soft or sandy, compaction or a reinforced base will keep your spa secure and stable.

Want to take your spa’s efficiency to the next level? Check out our 5 Best Insulation Tips: In-Ground Swim Spas vs Above-Ground Spas to see how the right insulation can save energy and protect your spa through every season.

Fact: About 30% of pool and spa structural cracks come from poor soil preparation during installation.

3. Cutting Corners on Quality

Everyone wants to save money, but with an inground swim spa, cheap materials are a false economy. Low-grade pumps, thin shells, or budget plumbing might seem fine at first, but they’ll fail faster than you think.

Imagine this: You choose a discount pump to save $1,500, and six months later, it burns out mid-summer. Now you’re out of pocket and out of luck.

Pro Tip: Always use high-quality, water-rated materials and components. Ask your builder about product warranties and lifespan expectations.

Fact: A well-built inground swim spa using quality materials can last 15 to 20 years, compared to just 7–10 for lower-end builds.

4. Underestimating Costs

Let’s be honest — every dream project costs more than expected. Between excavation surprises, add-ons like jets or lighting, and those “while we’re at it” upgrades, expenses can rise quickly.

Reality check: Most inground swim spas range from $15,000 to $50,000, depending on size, design, and materials. Add landscaping and decking, and the number climbs higher.

Pro Tip: Always collect multiple quotes from licensed professionals and ask for detailed, itemized estimates. Set aside at least 10–15% extra for unexpected costs.

Fact: More than 60% of backyard pool and spa projects exceed their original budget because of overlooked labor or material changes.

5. Neglecting Future Maintenance

Once your inground swim spa is installed, don’t let neglect undo your investment. Skipping maintenance might save you a few weekends now, but it will cost you big later.

Think of it like a car — skip the oil changes, and you’ll pay for an engine. Skip spa maintenance, and you’ll pay for a new heater, filter, or shell.

Pro Tip: Schedule weekly cleanings, balance your water chemistry, and check filters and jets monthly. Regular care keeps your spa safe, efficient, and crystal-clear all year.

Want to keep your swim spa in top shape year-round? Check out our Best Practices for Regular Pool Maintenance Checks guide for easy weekly and monthly routines that actually work.

Fact: Consistent maintenance can double the lifespan of your swim spa and reduce repair costs by up to 40%.

Frequently Asked Questions About Inground Swim Spas

How thick should a concrete slab be for a swim spa?
A concrete slab should be at least 4 inches thick to support the weight of a swim spa. Heavy-duty models may need 6 inches for added strength.

What’s the most expensive part of building an inground swim spa?
Excavation and site prep are usually the priciest steps, especially if your property has rocky soil or drainage issues.

How long does an inground swim spa last?
With proper care, an inground swim spa can last 15–20 years. Maintenance is the key to longevity.

What’s one of the greatest risks of owning a swim spa?
Water safety. Always supervise children and non-swimmers and install secure fencing or covers for protection.

The Solid Rock Pools and Spas Touch

At Solid Rock Pools and Spas, we know that your inground swim spa in GA isn’t just a backyard upgrade — it’s your personal escape. Our team brings decades of experience in pool and spa design, construction, and maintenance, ensuring every project is as durable as it is beautiful.

From soil testing to water chemistry, we handle every detail with precision and care. So whether you’re dreaming of a cozy spa for two or a full backyard retreat, you can trust The Solid Rock Touch to make it seamless, stunning, and built to last.

Ready to bring your dream inground swim spa to life?
Visit www.gosolidrock.com or call 770-943-9323 to get started today.