If you’re thinking about installing a pool, one of the first questions you’ll probably ask is:
“How big should our pool be?”
It’s a great question, and an important one.
Unlike patio furniture or landscaping, a pool isn’t something you can easily change once it’s in the ground. You can’t stretch it, shrink it, or move it around. That means choosing the right pool size the first time is essential.
The good news? For most families, finding the right pool size is actually simpler than it seems. It mostly comes down to understanding how your family will use the pool and what your backyard allows.
Let’s walk through the questions I encourage families to ask when deciding on the right pool size.
Who Will Use the Pool the Most?
This might seem obvious, but it’s one of the most important questions you can ask.
I’ve talked with plenty of parents who say something like:
"We want a really big pool."
When I ask why, the answer is often something like:
"Because the kids want one"
Here’s the truth: kids are happy with almost any pool.
Whether the pool is 25 feet long or 35 feet long, most kids will use it the exact same way, swimming, playing games, and hanging out with friends.
In fact, I’ve never once seen a child boycott a swimming pool because it wasn’t big enough.
So when choosing your pool size, think about how your family actually spends time in the water. For many families, a medium-sized backyard pool works perfectly.
What Pool Size Works Best for Families?
For many families, pools in the 12x24 to 16x40 range tend to hit the sweet spot.
Why?
Because they offer plenty of room for:
- Kids playing and swimming
- Parents relaxing in the water
- A few friends visiting
- Lounging ledges or seating areas
At the same time, they don’t overwhelm the yard or require excessive maintenance.
Remember, bigger pools mean:
- More water
- More chemicals
- More cleaning
- More heating costs
That doesn’t mean large pools are bad, but bigger isn't always better for every family.
Do You Want to Swim Laps in Your Pool?
If someone in your household plans to swim laps regularly, pool length becomes much more important.
For true lap swimming, I typically recommend at least 30 feet in length.
However, there’s good news here.
Today, many pool owners use swim tether systems or swim jets, which allow you to swim continuously even in a shorter pool. This means you can get a great workout without needing a massive backyard pool.
So if exercise is part of the plan, you’ll want to factor that into the size decision.
How Much Patio Space Do You Want Around Your Pool?
Many homeowners focus only on the pool itself, but the patio space around the pool is just as important.
Ask yourself:
- Will you have outdoor furniture?
- A grill or outdoor kitchen?
- Lounge chairs?
- A dining table?
- Shade structures?
If you install a very large pool but leave little room for seating or entertaining, your backyard might feel cramped.
A well-balanced backyard usually includes:
- Pool
- Patio space
- Landscaping
- Room for kids to play
Your pool should enhance the yard, not take it over.
With multiple sizes and features to choose from, pricing can vary. Want a clearer idea of what your pool might cost? Try our Design and Price tool below.
What Backyard Space and Property Setbacks Do You Have?
Local zoning laws often limit where a pool can be installed.
These rules, called setbacks, determine how close a pool can be to:
- Your house
- Property lines
- Easements
- Septic systems
- Utility lines
Because of this, your backyard size and layout may naturally guide what pool size works best.
This is one of the reasons it’s helpful to work with a professional pool installer early in the planning process.
How Often Will You Entertain Guests?
Many families imagine hosting big pool parties every weekend.
But here’s something I’ve learned over the years: most pool owners entertain less often than they expect.
And even during parties, not everyone is in the pool at the same time.
In most gatherings, fewer than half of the guests are actually swimming.
That means you probably don’t need an enormous pool just to accommodate occasional events.
Instead, focus on creating a comfortable backyard space where people can relax, socialize, and enjoy the water together.
Will Your Family Grow Over Time?
It’s also worth thinking a few years down the road.
Maybe your kids are young now.
Or maybe you expect:
- Grandkids
- Visiting family members
- Neighborhood kids stopping by
A pool often becomes a gathering place for years to come.
Choosing a size that comfortably fits your family today, and allows a little room to grow, can make your backyard even more enjoyable long term.
The Bottom Line
Choosing the right pool size isn’t about going as big as possible.
It’s about finding the pool that fits your family's lifestyle, your backyard, and the way you want to spend time together.
For most families, the perfect pool isn’t the biggest one available, it’s the one that creates the best memories.
And when you choose the right size from the start, you’ll enjoy your backyard pool for decades without regret.
Frequently Asked Questions
What is the most popular swimming pool size for families?
Many families choose pools between 12x24 and 16x32 feet because they provide plenty of swimming space without overwhelming the backyard.
How big should a pool be for a family of four?
For many families of four, a pool between 12x24 and 14x30 feet offers plenty of room for swimming, relaxing, and playing.
What pool length do you need for lap swimming?
If you want to swim laps comfortably, you’ll usually want a pool around 30 feet long or more. Alternatively, swim jets or tether systems can turn shorter pools into effective lap pools.
How much space should be around a pool for a patio?
Many designers recommend at least 3-6 feet of patio space around the pool, though entertaining areas may require more.
From the Author
It’s exciting picking out your pool and imagining the finished space, but many homeowners aren’t quite sure how big their pool should be or what size will actually work best for their family.
I’m Marcus Sheridan, co-founder of River Pools, and I’ve spent more than two decades helping homeowners think through these types of decisions. One thing I’ve learned over the years is that the “right” pool size isn’t about choosing the biggest option, it’s about choosing the pool that best fits your family’s lifestyle, your backyard space, and how you plan to use it.
I wrote this article to help families ask the right questions before installing a pool so they can feel confident about the size they choose and enjoy their backyard pool for many years to come.
From the Manufacturer
At River Pools, we know that choosing a pool is about more than just selecting a shape or size. Families are thinking about how their backyard will function, how much maintenance they want, and how the pool will bring people together over the years.
If you're considering a fiberglass pool and trying to determine what size might work best for your backyard, the next step is speaking with a knowledgeable installer who can help evaluate your space and goals. When you’re ready to take that step, connecting with a local installer can help you explore pool sizes, designs, and options that may fit your family and your backyard.
Ready to start the conversation?
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