What Is a Good Size Pool for a Small Backyard?

Around 10 by 20 feet is the usual sweet spot, but the deciding number is what is left over — a pool needs a metre of deck on every side to be usable.

By Zakaria October 11, 2026 3 min read Save to Pinterest

A small curved backyard pool with a flagstone surround and two loungers — Photo: zachstradling0, Pixabay Content License, via Pixabay

On this page

Around 10 × 20 ft is the usual sweet spot — but the deciding number is what is left over. A pool needs about a metre of deck on every side plus room for the plant. Measure the leftover space first.

The short answer

Around 10 by 20 feet is the common sweet spot for a small garden — large enough for several people, small enough to heat and maintain affordably. The deciding figure is what remains, since a pool needs roughly a metre of hard surface on every side for safety and access, plus space for plant equipment and often a required safety barrier. A plunge pool of about 8 by 12 feet is the practical floor. A uniform depth of about 1.2 metres keeps volume and running costs down.

10 × 20 ft is the usual sweet spot
8 × 12 ft plunge pool is the practical floor
A metre of hard surface on every side, more where people enter
Plan the plant equipment and the safety barrier at the start
Uniform 1.2 m depth — a deep end costs water, heat and money
A pool becomes the garden in a small plot. Decide that deliberately

Sizing by what is left

This table answers the question on its own

Pool	Footprint	Plus surround	What it is for
Plunge	8 × 12 ft	~14 × 18 ft	Cooling off, sitting, play
Small family	10 × 20 ft	~16 × 26 ft	Several people, play, short swims
Swim spa	~8 × 15 ft	~14 × 21 ft	Actual swimming, against a current
Full size	16 × 32 ft	~22 × 38 ft	Lengths — rarely fits a small plot

Measure the leftover, not the pool

Draw the pool and its metre of surround and the plant housing on a plan of the garden, then look at what remains. If there is nowhere left to put a table, the pool is too big.

Why the surround is not optional

Safety. A narrow wet edge is exactly where falls happen.
Maintenance. You need room to walk round with a brush and a net.
Use. Loungers and a towel-drop area need more than a metre on at least one side.
Rules. Many jurisdictions require a safety barrier at a set distance, which eats further into the plot and must be planned from the start, not retrofitted.

Smaller is cheaper to run, substantially

Heating, chemicals and water replacement all scale with volume. Depth matters as much as surface area — a uniformly shallow pool holds far less water and heats much faster than one with a deep end.

Skip the deep end

A uniform 1.2 m suits swimming, standing and playing, and keeps the volume down. A deep end only earns its water and heat if you genuinely want to dive, and safe diving needs far more depth than a small pool can provide. A flat floor also makes cleaning and cover fitting simpler.

The honest consideration

A pool is a fixed object that cannot be used for anything else, and in a small plot it stops being a feature and becomes the garden. Positioning it to one side rather than centrally, keeping the surround material consistent with the rest of the paving, and planting the edges all help. Above-ground and plunge options are far easier to reverse than an inground pool if the household changes.

Common questions

What is a good size pool for a small backyard?

Around 10 by 20 feet is the common sweet spot — big enough for several people to swim and play, small enough to heat and maintain affordably, and compact enough to leave usable garden around it. The more important number is what remains afterwards, because a pool needs roughly a metre of deck on every side to be safe and pleasant to use, plus somewhere for the plant equipment. Measure the leftover space before choosing the pool, not after.

What is the smallest practical pool?

A plunge pool of about 8 by 12 feet is the usual floor for something genuinely useful, giving room to cool off, sit and play without pretending to be for lengths. Below that you are into spa territory, which is a different proposition with different running costs. If swimming specifically is the point and space is tight, a swim spa with a current generator fits in a footprint no bigger than a large plunge pool.

How much space do you need around a pool?

At least a metre of hard surface on every side, and more on the side people enter from and where loungers go. That margin is partly safety, because a narrow wet edge is where falls happen, and partly practical, since you need room to walk round with a brush and a net. Many local rules also require a safety barrier at a set distance, which eats further into the plot and must be planned at the start.

Does a small pool cost much less to run?

Yes, and this is the strongest argument for going smaller than the plot technically allows. Heating, chemicals and water replacement all scale with volume, so a plunge pool costs a fraction of a full-size one to keep warm and balanced. Depth matters as much as surface area here, since a uniformly shallow pool holds far less water than one with a deep end and heats much faster.

Should a small pool have a deep end?

Usually not. A uniform depth of about 1.2 metres suits swimming, standing and playing, and it keeps the volume and therefore the running costs down. A deep end is only worth the water and the heat if you genuinely want to dive, and diving needs considerably more depth than most small pools can safely provide. A flat floor also makes cleaning and cover fitting simpler.

Will a pool make a small garden feel smaller?

It can, and that is worth considering honestly before committing. A pool is a fixed object that cannot be used for anything else, and in a small plot it becomes the garden rather than a feature in it. Positioning it to one side rather than centrally, keeping the surround material consistent with the rest of the paving, and planting around the edges all help. Above-ground and plunge options are also far easier to reverse than an inground pool.

Backyard Weekly

Know what to plant, week by week

Join the weekly email for seasonal jobs, fixes for what is going wrong, and gear worth buying.

Not ready to subscribe? The planting calendar is free and needs no email.

By subscribing you agree to our privacy policy. Grow In Backyard will never sell your address.

Clear turquoise pool water with sunlight rippling across the surface

Outdoor Living · Oct 8, 2026