Planning

How to choose the right above-ground pool size

Choosing the size of a future pool is often the toughest decision for homeowners on Montreal's South Shore. Too small, and it limits your activities; too large, and it exceeds your budget or the space available in your yard. Here are the essential criteria for making the right choice before an above-ground pool installation.

1. Measure the space actually available

Before settling on a specific diameter, measure your property while accounting for the following:

• The minimum distances required by your municipality from property lines
• The space needed for a deck, a safety fence and a surrounding patio
• Sun orientation to maximize the pool's exposure to sunlight
• The location of underground utilities (sewer, wiring, pipes)

A simple rule: always allow at least 3 to 5 feet of free space all around the pool for circulation and maintenance.

2. Round or oval: which shape for which need?

The choice between a round pool and an oval pool depends directly on the intended use:

• Round (12 to 27 feet) — ideal for relaxed swimming, young children and smaller yards. Generally more affordable to install.
• Oval (12x15 to 12x21 feet) — perfect for swimming laps, family games and larger groups thanks to its elongated surface.

3. Assess your family's needs

The ideal size also depends on how many people will use the pool regularly:

• 1 to 2 people: a 12 to 15-foot round pool is generally sufficient
• Family of 3 to 4 people: aim for 18 to 21 feet round, or a 12x15 oval format
• Large families or frequent gatherings: 24 to 27-foot round models or 12x18 to 12x21 ovals offer the space needed for everyone to comfortably enjoy the water

4. Factor in the total budget

The pool's diameter directly influences the installation price, but also long-term maintenance costs (chemicals, pump electricity, heating). Here's an overview of installation prices at Piscine Rive Sud:

• Round pool 12 ft: $2,500 — 27 ft: $5,000
• Oval pool 12x15 ft: $5,100 — 12x21 ft: $5,600

A larger pool also requires a pump and filter sized for a greater water volume, which can influence your accessory choices.

5. Think about the future

If you plan to grow your family or entertain more in the coming years, it may be wise to opt for a slightly larger size from the start. Replacing an existing pool with a larger model involves dismantling and reinstallation costs that often exceed the initial price difference.

Expert tip: for the medium-sized yards typical of the South Shore, a 12x18 oval format often offers the best compromise between swimming surface and remaining deck space.

6. Liner replacement: size matters too

If you're only replacing the liner of an existing pool, make sure to measure the current diameter precisely — liners aren't universal, and a poor fit causes wrinkles and premature wear. Our article on pool liner replacement covers this step in detail.

Get a price based on your choice

Our online configurator lets you instantly compare prices for different sizes and shapes, whether for a new installation or a liner replacement.