Choosing the size of your pool is one of the decisions people most often regret getting wrong, in both directions. Too big and the pool swallows the backyard, leaving no room to sit around it. Too small and the kids outgrow it in two summers.
The right size starts with how you will use the pool, then fits that to the space you have. Here is how we work through it with families every week.
Key takeaways
- Start with how you will use the pool, not with a number.
- Allow for paving, fencing, equipment and access, not just the water.
- Most Geelong families land on a pool around 7–8.5 m long.
- Narrow and plunge models make pools possible in small yards.
Start with how you will use the pool
Before you measure anything, decide what the pool is mainly for. Most families have one main use and a couple of secondary ones.
| Main use | Typical size range | Good Compass fits |
|---|---|---|
| Cool-off, relaxing, small yard | Under 6 m long | Plunge range |
| Family play and lounging | 6 – 9.5 m long | Sanctuary, Vogue |
| Family play plus some laps | 8 – 12 m long | X-Trainer, Contemporary |
| Serious lap swimming | 10 m and up | Fastlane |
| Pool and spa together | Varies | Combo pools |
Think ahead, too. A family with toddlers today will have teenagers in ten years who want room to dive in and swim. A couple planning for retirement might value wide steps, benches and a gentle entry over length.
Measure the space you really have
The water is only part of the footprint. When you look at your yard, allow for:
- Paving around the pool. At least about a metre all round, and more on the side you will sit or entertain.
- The fence and non-climbable zone. The barrier needs clear space outside it. See our pool fence rules guide.
- Equipment. Pump, filter, chlorinator and heater need a spot close to the pool with airflow and service access.
- Setbacks and easements. Sewer and stormwater easements, boundary setbacks and building foundations can all restrict where the pool goes.
- Access for installation. The shell arrives by truck and is lifted in by crane. Powerlines, trees and tight side access matter.
- The rest of your life. Lawn for the dog, the clothesline, a vegie patch, a shed. Keep what matters.
A simple trick: mark the pool outline on the ground with a hose or spray paint, then add the paving and fence line. Live with it for a weekend. It tells you more than any plan.
Compass pool dimensions
Here are some of the most popular sizes in the Compass range, so you can compare real numbers against your yard. Full size lists are on each range page.
| Model | Length | Width | Depth (shallow – deep) |
|---|---|---|---|
| Plunge 3.8 | 3.87 m | 2.13 m | 1.20 m |
| Plunge 5.0 | 5.00 m | 3.39 m | 1.42 – 1.65 m |
| Sanctuary 6.0 Narrow | 6.00 m | 3.40 m | 1.18 – 1.55 m |
| Sanctuary 7.0 | 7.00 m | 4.20 m | 1.18 – 1.74 m |
| Vogue 7.15 | 7.15 m | 3.60 m | 1.09 – 1.68 m |
| Sanctuary 8.2 | 8.20 m | 4.20 m | 1.18 – 1.85 m |
| X-Trainer 8.2 SL | 8.20 m | 3.00 m | 1.09 – 1.75 m |
| Sanctuary 9.4 | 9.40 m | 4.20 m | 1.18 – 1.97 m |
| Contemporary 9.5 | 9.50 m | 4.28 m | 1.28 – 1.71 m |
| X-Trainer 10.2 | 10.20 m | 4.20 m | 1.09 – 1.93 m |
| Fastlane 12.3 | 12.26 m | 2.78 m | 1.46 m |
Selected sizes from the Compass range. See each range page for the full list and configurations.
Position: sun, wind and privacy
Size and position work together. The best size for your yard depends on where the pool can go.
- Sun. A pool in full afternoon sun warms faster and stays warmer. In Geelong, a north-facing position is ideal. Watch where shadows from the house, fences and trees fall in summer.
- Wind. Exposed pools lose heat quickly, which is a big factor on the Bellarine and Surf Coast. A slightly smaller pool in a sheltered spot is often more enjoyable than a bigger one in the wind.
- Trees. Deciduous trees drop leaves straight into the pool in autumn, and roots can interfere with excavation.
- Privacy. Consider neighbours’ windows and second storeys overlooking the yard.
- Connection to the house. A pool that is easy to supervise from the kitchen gets used more and is safer for young children.
A worked example
Take a typical Geelong block with a backyard of about 12 m wide by 10 m deep. After allowing for a 1.5 m paved strip along the house, 1 m paving on the sides, the fence line, a small equipment area and a patch of lawn for the kids, a family pool of around 7 to 8 m by 3.4 to 4.2 m usually fits comfortably. A Sanctuary 7.0 or a Vogue 7.15 would be a natural shortlist. If the family wanted to keep more lawn, a Plunge 5.0 or Plunge 6.2 would free up several more square metres. Every block is different, which is why we always measure on site before recommending a shape.
Width and depth matter as much as length
Width decides how social the pool feels. A 4.2 m wide pool lets several people float, play and pass each other easily. Narrow models of around 3 to 3.4 m are designed for tighter blocks and side yards, and still give a full-length swim.
Depth decides who can use which part of the pool. A shallow end around 1.1 to 1.2 m lets most older kids stand. A deep end around 1.7 to 2 m gives adults and teenagers room to swim and duck-dive. Fibreglass shells have graded floors and built-in steps and benches, so the depth changes smoothly rather than dropping suddenly.
Bigger pool, bigger running costs
Every extra square metre of surface loses heat and evaporates water, and every extra cubic metre needs filtering, sanitising and heating. A larger pool is not dramatically more expensive to run, but the difference adds up over 20 years. It is another reason to size for how you will really use the pool. Our running costs guide explains what drives the bill, and our cost guide covers the upfront side.
Small yard? You still have options
Smaller blocks in growth areas like Armstrong Creek, Leopold and Lara, and townhouse courtyards closer to town, are where compact pools shine.
- Plunge pools give you somewhere to cool off, relax and sit together, in a fraction of the space. Compare the trade-offs in plunge pool vs full-size pool.
- Narrow models like the Sanctuary Narrow, Vogue 7.15 SL and X-Trainer SL fit side yards and long thin blocks.
- Swim spas can be an alternative where a pool won’t fit. See swim spa vs fibreglass pool.
Common sizing mistakes
- Forgetting the paving. A pool with no room to sit beside it never gets used as much.
- Going big for resale. Buyers value a usable yard as much as a big pool.
- Ignoring sun and shade. Position matters as much as size. A smaller pool in full sun gets more use than a big one in shade.
- Not checking easements early. They can rule out the obvious spot entirely.
- Forgetting the view from the house. You will look at the pool far more often than you swim in it. Place it where it looks good from the kitchen and living areas.
See the sizes in person
Numbers on a page are hard to picture. Looking at finished pools helps. Browse our local projects to see how different sizes sit in real Geelong backyards, then come into the showroom to walk through the options with us.
Frequently asked questions
What is a good size pool for a family of four?
Many families of four are very happy with a pool around 7 to 8.5 metres long and 3.4 to 4.2 metres wide. That is big enough for games, a swim and lounging on the steps, without taking over the whole backyard.
How much space do I need around a pool?
As a rule of thumb, allow at least about a metre of paving around the pool, more on the side you will use for lounging, plus room for the fence, equipment and access. Setbacks, easements and the non-climbable zone outside the fence also take space.
How long does a pool need to be for laps?
For proper lap swimming, aim for at least 10 metres, and ideally longer. A dedicated lap pool like the Compass Fastlane comes in fixed lengths and can be extended up to 30 metres. A family pool with a long straight section, like the X-Trainer, suits families who swim some laps.
What is the best pool depth for kids?
A shallow end around 1.1 to 1.2 metres lets most older children stand, with wide steps and benches for younger ones. A deeper end gives adults and teenagers room to swim. Fibreglass shells have graded floors designed with both in mind.
Does a bigger pool cost a lot more to run?
A bigger pool holds more water, so heating and chemical costs rise roughly with volume and surface area. Filtration needs also increase. A cover and efficient equipment narrow the gap considerably.
Can you fit a pool in a small backyard?
Often, yes. Compact plunge pools start under 3 metres long, and narrow versions of family shapes are made for tight blocks. A site visit will tell you what fits once setbacks, access and the fence are allowed for.