Planning the Right Location and Size for Your Pool
Location and size determine how the pool will be used, what it costs to run and whether it needs a permit – long before the first shovel hits the ground. By factoring in sun, wind, access and the right pool size from the very start, you avoid the most expensive planning mistakes.
Sun Exposure and Wind Protection: Positioning the Site by Sun and Wind
The most important free source of heat is the sun. A pool should sit where as little shade as possible falls on it from midday into the late afternoon. Check the shadows cast by the house, garage, neighbouring buildings and large trees – and do so across the course of the day, not just at noon. Aligning the long side to the south or south-west captures the most solar radiation at our latitudes.
The second, often underestimated factor is wind. Wind increases evaporation at the water surface and, with it, the heat loss significantly. Evaporation is the single largest factor in an outdoor pool cooling down. A windbreak on the main windward side – frequently west to south-west – in the form of a hedge, wall or fence noticeably lowers the heating demand. The windbreak must not be so tall, however, that it shades the pool again. Sun and wind protection have to be weighed against each other.
Distance to Trees and Property Boundaries
Trees and large shrubs bring several disadvantages to the pool edge at once: leaves, blossoms and pollen burden the water and the filter, they cast shade, and over the years their roots can lift the base slab, the pipework and the terrace. Plan for generous distance to any existing trees, therefore, and consider how far crowns and roots will still grow in the years to come.
In Germany there are no nationwide figures for the distance to the property boundary. What matters is the state building code (Landesbauordnung) and the neighbour law of your federal state; the requirements sometimes differ considerably. Whether, and to what extent, a private pool is exempt from a permit also depends on its volume and on its position within a built-up area or in the outlying area. Clarify boundary distances, setback areas and any permit requirement with the responsible building authority before fixing the location – this saves expensive demolition work later.
Access for Construction and Equipment
A site that looks ideal on paper can be impossible to build in practice if the construction area cannot be reached. Check early on how the excavator, spoil, concrete and – with fibreglass or polyester pools – the crane will reach the site. Narrow yard entrances, soft ground, sloping terrain or overhead lines crossing the plot can severely restrict access.
- Excavation and delivery: space for the excavator, skip and material storage close to the pool.
- Crane set-up area: a load-bearing, level standing area with a clear swing radius for prefabricated pools.
- Cable and pipe runs: map out the route for the pipework between pool and equipment, and for the power cable, in your mind even now.
Think of access not only for construction but also for later operation: filter media, spare parts and, if need be, a replacement pump must be able to reach the equipment location without rebuilding the garden.
Pool Size in Relation to Use
The size should be governed by what the pool is meant to do – not by the maximum the garden can accommodate. A pool for cooling off and for children can be compact; anyone who really wants to swim lengths needs length. The following usage profiles serve as a rough guide:
| Use | Typical length | Note |
|---|---|---|
| Cooling off, children, splashing | approx. 4–6 m | a shallow water depth is enough, economical to run |
| Family pool, playing and swimming | approx. 6–8 m | a good compromise between benefit and cost |
| Serious lap swimming | from approx. 8–10 m | or a counter-current unit as a space-saving alternative |
Every additional cubic metre of water carries an ongoing cost – through heating, circulation, water and water treatment. A larger water surface also demands more circulation capacity and thus tends to require a stronger pump and a larger filter. Choose the size realistically according to the expected use, therefore, and not according to what is theoretically possible. A counter-current unit can cover an athletic usage profile even in a small footprint.
Planning the Equipment Location from the Outset
The most common planning mistake is to position the pool and only then tuck the plant room somewhere afterwards. Yet the equipment location is a genuine planning parameter that shapes operation for years. The shorter and straighter the pipe run between pool and pump, the lower the flow resistance – especially on the sensitive suction side. Long suction runs with many bends make priming harder and encourage air problems.
The height position also matters: if the pump sits below the water level, water flows to it on its own, which makes priming easier. If the equipment stands higher, it has to draw the water up – and then short runs and an adequate cross-section become all the more important. On private pools, suction and pressure lines are usually run in d50 (DN40) and d63 (DN50); on longer runs the next size up reduces pipe friction.
- Proximity to the pool: a short suction line, fewer bends, better hydraulics.
- Height position: as close to or below the water level as possible for reliable priming.
- Noise: do not place the heat pump and pump directly next to the terrace, bedroom or property boundary.
- Drainage and ventilation: a dry, ventilated room protects the equipment and allows frost protection in winter.
- Accessibility: allow room for servicing, backwashing and replacing the components.
Fixing the equipment location together with the pool location avoids excessively long pipe runs, unnecessary pressure losses and a permanently increased power consumption.
Thinking All the Factors Together
Location and size cannot be optimised one after the other, only together. A sunny spot is of little use if the equipment can only be connected there with a long suction line; the perfect pool is no help if the excavator cannot reach the excavation pit. This sequence has proven itself in early planning:
- Observe the sun exposure and wind direction on the specific plot.
- Clarify distances to boundaries and trees, as well as permit questions, with the building authority.
- Check access for construction and later operation.
- Derive the pool size from the planned use.
- Fix the equipment location together with the pipe route – not as an afterthought, but as its own planning point.
In this way, five individual questions come together into a coherent overall solution that stays efficient in operation and avoids expensive reworking.
FAQ
Which compass direction should a pool face?
The ideal spot has sun from midday into the afternoon, usually with the long side facing south to south-west. The decisive factor is that the house, trees or neighbouring buildings do not shade the pool during the day.
What distance do I have to keep from the property boundary?
There is no nationwide figure for this. Boundary distances and any permit requirement depend on the state building code and the neighbour law of your federal state, and should be clarified with the responsible building authority before choosing the location.
How far can the plant room be from the pool?
As a rule: as close as possible. Short, straight pipe runs with few bends reduce the flow resistance, make priming easier and lower power consumption. Long suction runs, by contrast, encourage air and priming problems.
How big should the pool be?
The size should be based on how it will be used: compact for cooling off, larger for lap swimming. Every additional cubic metre carries an ongoing cost through heating, circulation and water treatment – when in doubt, plan realistically rather than for the maximum.
How much distance should the pool have from trees?
As much as possible. Trees bring leaves, blossoms and shade, and over the years their roots can damage the base slab, the pipework and the terrace. Factor the future growth of the crown and roots into your distance planning.
This guide provides general technical orientation and does not replace professional planning. Safety-, electrical- and permit-relevant work must be carried out by qualified specialists.
