What’s the Difference Between an Inground Pool and a Semi-inground Pool?

Introduction: Making a Splash with the Right Pool Choice

Ever wonder if your dream pool should be a fully inground pool, or partially above ground? With over 10 million residential pools in the U.S., you’re in good company if you’re considering adding one to your backyard. But here’s the catch—not all pools are created equal. Choosing the wrong type of pool can cost you more than just money. It can impact your lifestyle, limit your design options, and even affect your home’s resale value.

Picture this: a shimmering blue pool nestled flush with your patio, offering a resort-style escape just steps from your back door. Or perhaps a raised, modern structure with sleek decking that becomes a stylish centerpiece in your outdoor space. Both are beautiful. Both are functional. But they represent two very different types of pools: the inground pool and the semi-inground pool.

Think of your pool like the foundation of your home—you can go deep with a fully inground build, stay flexible with a semi-inground design, or meet somewhere in the middle to suit your space and budget.

And while many assume a semi-inground pool is simply a lower-cost compromise, the truth might surprise you.

In this guide, we’ll break down the key differences between an inground pool and a semi-inground pool—from cost and design to safety and longevity—so you can choose the best fit for your lifestyle and backyard.

Whether you’re planning a brand-new inground pool or considering a semi-inground option, understanding their differences is essential before you dive in.

What Is an Inground Pool?

Definition and Key Features

An inground pool is fully installed below ground level, creating a sleek, seamless look that blends effortlessly with the surrounding landscape. These pools are typically constructed from:

Concrete: Highly customizable and durable.
Fiberglass: Pre-molded shells with smooth finishes.
Vinyl: Flexible liners that offer budget-friendly versatility.

Built to last, inground pools are considered permanent structures and are favored by homeowners looking to invest in a long-term backyard retreat.

Benefits of Inground Pools

Design Flexibility: From classic rectangles to freeform lagoons, inground pools offer nearly limitless customization. Explore fiberglass pool designs for inspiration.
Enhanced Property Value: A well-designed inground pool can significantly boost your home’s curb appeal and resale potential.
Weather Resilience: These pools are built to withstand extreme temperatures and shifting soil conditions, making them a solid choice for various climates.

What Is a Semi-inground Pool?

Definition and Construction

A semi-inground pool is partially installed in the ground, with a portion of the pool wall exposed above grade. This hybrid design is especially useful for:

Sloped or uneven yards
Areas with excavation restrictions
Homeowners seeking a faster, more affordable solution

These pools are typically constructed with reinforced steel or aluminum walls and can be adapted to different elevations for a custom fit.

Unique Advantages

Affordability: Semi-inground pools are a more budget-conscious way to enjoy the perks of pool ownership.
Quicker Installation: Less digging means faster setup, often completed within weeks.
Stylish Integration: With creative decking, stone facades, or surrounding landscaping, these pools can offer a polished, modern look.

Cost Comparison: Upfront and Long-Term

Initial Investment

Inground Pools: Expect to invest between $50,000 and $80,000 or more, depending on size, materials, and customization.
Semi-inground Pools: Typically cost between $10,000 and $25,000, making them a more accessible option for many homeowners.

Long-Term Expenses

Inground Pools: While durable, they may require resurfacing, plumbing repairs, or equipment updates over time.
Semi-inground Pools: Lower maintenance costs, but potentially shorter lifespan depending on construction quality.

Aesthetic Appeal: Seamless vs. Stylish

Visual Integration

Inground Pools: Offer a clean, flush look that mimics resort-style luxury.
Semi-inground Pools: Can be elevated with creative design elements like multi-level decking, retaining walls, or built-in seating areas.

Customization Options

Inground Pools: Allow for more freedom in shape, size, depth, and finish.
Semi-inground Pools: Usually available in round or oval shapes, but still offer room for personalization through exterior design.

Maintenance and Longevity

Maintenance Needs

Inground Pools: May require more intensive care, including filtration, resurfacing, and chemical balancing.
Semi-inground Pools: Easier access to components can simplify routine cleaning and maintenance.

Lifespan Comparison

Concrete Inground Pools: Can last 25–50 years with proper upkeep.
Semi-inground Pools: Typically last 10–20 years, depending on materials and usage.

Installation Time and Complexity

Inground Pool Installation

Timeline: 6–12 weeks or longer.
Process: Excavation, structural framing, plumbing, electrical, and landscaping—often requiring professional contractors.

Semi-inground Pool Installation

Timeline: 1–3 weeks.
Process: Less invasive and ideal for DIY-friendly homeowners or those working with a tight schedule.

Design Flexibility: Shapes, Sizes, and Styles

Inground Pool Design Freedom

Custom Shapes: Choose from kidney, L-shape, freeform, and more.
Property Fit: Best for large backyards or luxury outdoor spaces.
Compact Options: Small inground pools are also available for tighter spaces.

Semi-inground Pool Design Options

Standard Shapes: Round and oval are the most common.
Creative Integration: Can be built into multi-level yards for a unique look and feel.

Temperature Regulation and Energy Efficiency

Heating Considerations

Inground Pools: Retain heat more effectively due to full ground insulation.
Semi-inground Pools: May lose heat faster depending on how much of the structure is exposed.

Energy Costs

Inground Pools: Typically require less energy to maintain temperature.
Semi-inground Pools: Can benefit from solar covers and energy-efficient heat pumps to reduce costs.

Structural Considerations: Stability and Durability

Foundation and Support

Inground Pools: Constructed with reinforced concrete shells or durable fiberglass for maximum stability.
Semi-inground Pools: Built with steel or aluminum walls, often braced with additional support for long-term durability.

Weather Resistance

Inground Pools: Better equipped to handle soil pressure, frost heave, and extreme weather.
Semi-inground Pools: May require added reinforcement or insulation in colder climates.

Family Suitability: Safety and Accessibility

Child and Pet Safety

Inground Pools: Can be easily enclosed with fencing and gated access for safety.
Semi-inground Pools: Raised edges can deter unsupervised access, and built-in steps make entry safer for kids and pets.

Accessibility Features

Inground Pools: Support a variety of entry options, including beach entries, ladders, and lifts.
Semi-inground Pools: Surrounding decks or platforms can offer convenient access for all ages.

Choosing the Right Pool for Your Home

Key Lifestyle Questions

Ask yourself:

Do you want a luxury focal point or a functional family feature?
Is your yard flat or sloped?
What’s your budget for installation and maintenance?
Are you planning to stay in your home for the next 10–20 years?

Use Case Scenarios

Choose an inground pool if you want long-term value, extensive customization, and a high-end aesthetic.
Opt for a semi-inground pool if you’re working with a sloped yard, tighter budget, or need a faster installation timeline.

Conclusion: Dive into the Right Decision

There’s no one-size-fits-all answer when it comes to choosing between an inground and a semi-inground pool. Each offers distinct advantages depending on your space, budget, and vision for your backyard.

Understanding the key differences—from installation and cost to design and durability—will help you make a confident, informed decision.

Whether you’re envisioning a full backyard transformation or a stylish, space-saving pool, the right choice is just a splash away.

This comprehensive guide is designed to help you explore your options with confidence and clarity. Still have questions? Speak with one of our pool experts to explore your options and get personalized recommendations based on your property and goals.