What exactly does a swimming pond cost?

Table 1 – Average Total Price per Size

Table 2 – Costs per Part (indication)

Table 3 – Annual Maintenance and Operating Costs

Table 4 – Influential Price Factors

Table 5 – Indicative Lead Time per Phase

Table 6 – Comparison Natural Pool vs. Classic Swimming Pool

Conclusion
The construction of a swimming pond requires an investment between €20,000 and €70,000 or more, depending on size, technical choices, and aesthetic finish. It is a sustainable and visually high-quality solution for those who prefer natural water, low operating costs, and a landscape-integrated design. Careful preparation and collaboration with a specialized party are essential for long-term success.

The total investment in a swimming pond depends not only on the size, but especially on the technical choices, the terrain situation and the desired finish. Below you will find the most important factors that can significantly increase or decrease the costs.

1. Size and Depth

• The larger the surface area or the deeper the swimming section, the higher the costs for excavation, liner or shell material, water volume, filter capacity, and edge finishing.
• The required planting and circulation capacity also increase proportionally with the volume.

Effect on price: direct and substantial

2. Construction Method

Note: HDPE and concrete require more expertise and preparation, but offer higher stability.

3. Filter Zone and Biological Technology

• The choice between passive filtering (lots of planting and lava zones) and active filtering (pump technology, drum filter) influences both installation costs and maintenance.
• Active filtering is more expensive to purchase, but ensures clearer water and a more compact design.

Effect on price: €2,000 to €10,000 difference depending on the chosen system

4. Groundwork and Subsoil

• Gardens that are difficult to access, clay soil, or a high groundwater level can cause additional costs.
• The removal of soil (storage or removal by container) also plays a role in the price.

Effect on price: highly location-dependent

5. Edging and Access

• Materials such as natural stone, ceramic, or wood composite are more expensive than simple grass or concrete edging.
• Stairs, decks, or integrated swimming platforms incur additional costs .

Effect on price: €100 to €250 per linear meter, depending on material choice

6. Accessibility of the Plot

• If cranes, machines, or tubs cannot be delivered directly, the costs for man-hours and hoisting will increase.
• In inner-city or enclosed gardens, crane costs can amount to €1,000 or more.

Effect on price: average €500 to €2,000 extra with limited access

7. Installation and Automation

• Additional technology such as a home automation system, control via app, or automatic water level control increases user comfort but also the initial investment.
• Automated pumps and filters are more efficient, but more expensive to purchase.

Effect on price: €1,000 to €4,000 depending on system choice

8. Planting and Garden Design

• The degree of natural integration determines not only the appearance, but also the workload and material requirements.
• Professional planting plans, bank reinforcements, and ecological zones increase both visual appeal and costs.

Effect on price: €1,000 to €5,000, depending on design choice

9. Optional
Extensions

• Heating (solar collectors or heat pump)
• Underwater lighting
• Pool house, shower or outdoor installation
• Fencing, enclosure or decking

Effect on price: each of these options can add €1,000 to €10,000 or more

10. Season and Construction Planning

• In spring and midsummer, prices are often higher due to the busyness of executing parties.
• Building in autumn or winter is sometimes logistically more advantageous, provided ground conditions permit.

Effect on price: 5% to 10% price difference possible depending on the season

Summary in Table Form

Conclusion

The size of a swimming pond is one of the most determining factors for the final investment. Not only the swimming area itself, but also the required filter capacity, planting, technology and finishing increase as the pond gets bigger. At the same time, scaling also offers advantages in terms of cost efficiency per square meter.

1. Relationship between surface area and investment

The larger the bath, the lower the average price per m² – but the higher the absolute investment.

2. Influence of technical components

Larger swimming ponds require:

• More digging and soil removal
• Heavier pumps and longer pipes
• Larger filter zones or more powerful biological systems
• More planting (for biological filtering and aesthetics)
• More material for foil, tub, bank cladding and edge finishing

As a result, material costs and labor hours increase proportionally to the surface area.

3. Influence on maintenance and use

• Larger ponds require more structural maintenance (pruning, planting, keeping free of leaves)
• Management of water quality (flow, sediment, algae) becomes more complex at higher volumes
• With sufficient depth (>1.5 m) and large surface area, some natural self-cleaning effects can be better realized

Note: a larger bath also means more energy consumption for pumping and heating (if applicable)

4. Economies of scale for larger projects

Although costs increase with size, the price per square meter often decreases:

More efficient use of machines, personnel and installations results in lower costs per unit for larger projects.

5. Choice advice based on purpose and space

The size must be tailored to the intended use, the desired appearance and the available space in the garden or on the site.

Conclusion

The size of a swimming pond has a direct impact on the cost, both in absolute terms and per square meter. Larger pools are more attractively priced per m², but require higher investments in earthworks, filtering and finishing. A careful consideration of available space, functional use and budget is necessary for an efficient and sustainable design.

The shape of a swimming pond has direct consequences for the construction costs, the technical design, the finishing and the maintenance. Although the shape is aesthetically important, it also has practical and financial implications that should not be underestimated during preparation and execution.

1. Rectangular or symmetrical shape

Characteristics:

• Easy to design and build
• Suitable for standard foil or HDPE application
• Optimal ratio between swimming area and filter zone

Advantages:

• Efficient placement of pumps and pipes
• Less material cutting loss
• Lower labor costs due to straight lines and simple formwork

Influence on price:
Lowest cost level for standard sizes

2. Oval or organic shape

Characteristics:

• Natural looking, better suited to green gardens
• More visual connection to landscape elements

Disadvantages:

• More cutting required for foil
• More complex edge finishing
• Less suitable for prefab or HDPE tanks

Impact on price:
10% to 20% higher than rectangular shapes, depending on the degree of complexity

3. Asymmetrical or custom-designed shape

Features:

• Fully customizable with unique contours
• Requires a construction with concrete, HDPE or welded EPDM
• Technical installations must be individually tailored

Disadvantages:

• Higher design costs and implementation risks
• More labor hours for edge finishing and fitting
• More difficult to combine with standard filters or covers

Influence on price:
20% to 35% higher than standard shapes, especially due to customization in technology, film and edge materials

4. Combination forms (for example, L-shape, with level differences)

Characteristics:

• Multiple zones (swimming, relaxing, filtering) in one structure
• Requires extra attention to water circulation and separations

Effect on design and technology:

• More complex installation of pump lines
• Custom planting and biological filtering
• Higher costs for excavation, formwork and material

Influence on price:
Highly dependent on complexity, but on average 25% to 40% above standard rectangular layout

Summary table – Influence of shape on price and execution

Conclusion
Although the shape of a swimming pond primarily seems like an aesthetic choice, it has significant consequences for the execution costs, material usage, and technical feasibility. Those who opt for simplicity save on labor and material; those who opt for unique shapes must take into account customization, longer construction time, and higher total costs. In any case, the following applies: the shape must be determined early in the design process to avoid surprises.

A well-functioning filter system is essential for clear and healthy water in a natural swimming pond. Unlike traditional swimming pools, natural swimming ponds usually work with biological filtration, optionally in combination with technical support. The choice of a particular system influences water quality, maintenance level, and installation costs.

1. Biological Filter Zone (passive filtering)

How it works
Water flows from the swimming area through a separate filter zone filled with lavarock, substrate, and aquatic plants. The plants purify the water through natural nutrient uptake, while the substrate houses micro-organisms that break down waste materials.

Features

• Completely natural process
• Separate filter zone required (often 30% of the pond surface area)
• Virtually maintenance-free, apart from pruning and plant care

Advantages

• Completely chemical-free
• Environmentally friendly and aesthetically pleasing
• Low operating costs

Disadvantages

• Requires relatively a lot of space
• Less controllable than technical systems

Installation costs (2025): €3,000 – €6,000
Annual maintenance costs: €150 – €400

2. Mechanical-biological filter system (active filtering)

Operation
The water is continuously pumped through a closed filter system where coarse dirt particles are mechanically removed (pre-filter or sieve), after which a biological post-settling and flow through filter media takes place.

Features

• Compact system, can be buried underground
• Combines technology with natural processes
• Very suitable for smaller gardens or tighter designs

Advantages

• Requires less space than a lava zone
• More consistent water quality with intensive use
• Can be efficiently combined with a UV filter or automatic control

Disadvantages

• Higher initial investment
• Electricity consumption for pump installation

Installation cost estimate (2025): €4,000 – €9,000
Annual maintenance costs: €250 – €600

3. Drum filter or micro-sieve filter (fine mechanical)

Operation
An advanced, self-cleaning rotating filter system removes suspended dirt particles (up to 60 microns or finer) from the water before it is returned to the biological zone or directly into the swimming area.

Features

• Very effective under high load (many leaves, intensive use)
• Often used in combination with other systems
• Replaces or strengthens pre-filtration

Advantages

• Continued automatic filtering, minimal manual maintenance
• Clear water quality, even with seasonal changes
• Ideal for luxury or professional use

Disadvantages

• High purchase price
• More complex technical maintenance (in case of malfunction)

Installation cost estimate (2025): €6,000 – €12,000
Annual maintenance costs: €300 – €700

4. UV or UVC filter (additional system)

Operation
UV light breaks down algae and microorganisms by directing water past a lamp that emits ultraviolet radiation. It is not a filter system in itself, but an additional technique to support biological or mechanical filtering.

Features

• Is placed inline in the circulation system
• Works preventively against green water and suspended algae
• Not visible, quiet and low-maintenance

Advantages

• Helps maintain clear water
• Reduces the biological load on the main filter
• Very low energy consumption

Disadvantages

• Works only in combination with pump and filter system
• Lamp must be replaced annually

Installation cost estimate (2025): €500 – €1,500
Annual maintenance costs: €100 – €200

5. Salt or Ozone Filtration (usually not applied to natural swimming pools)

Salt and ozone systems are used in swimming pools and wellness baths, but are not suitable for natural swimming pools. They disrupt the biological balance and harm aquatic plants and microorganisms.

Application in natural swimming pools: not recommended

Table – Comparison of filter systems

Conclusion

The choice of filter system largely determines the water quality, ease of use, and operating costs of a swimming pond. Biological systems are suitable for spacious gardens and a natural look, while mechanical or hybrid filters perform better in compact or intensively used ponds. A carefully matched system, combined with proper installation, ensures clear and stable swimming water with minimal maintenance.

In addition to the standard construction of a swimming pond (swimming area, filter zone, basic finish), there are numerous expansion options. These options can contribute to the comfort, aesthetics, durability, or functionality of the pond. Below is an overview of popular extras.

1. Lighting (underwater and surrounding area)

Application:
Creates atmosphere, increases safety for evening use, and accentuates pound contours.

Types:

• Underwater LED spotlights
• Mood lighting along edges or paths
• Automatically switched or controllable via app

Cost indication:
€500 – €2,500, depending on the number and type of fixtures

2. Heating

Application:
Extension of the swimming season and increased comfort in cooler temperatures.

Solutions:

• Air source heat pump (sustainable and energy-efficient)
• Solar collectors
• Heat exchanger (when connected to central heating)

Cost indication:
€2,500 – €6,000, excluding consumption costs

3. Automatic water level control

Application:
Compensates for evaporation and precipitation, prevents water level from being too high or too low.

Advantage:
Certainty of a stable level, especially during warmer summers.

Cost indication:
€400 – €1,200

4. Automatic pump control or home automation

Application:
Smart control of pumps and filters based on time, temperature, or pollution.

Advantage:
Energy-efficient and requires little manual intervention.

Cost indication:
€750 – €2,000

5. Built-in swimming ladder or stainless steel handrail

Application:
Safe and comfortable entry into the swimming zone.

Options:

• Built-in natural stone stairs
• Stainless steel entry handle or swim ladder
• Integrated seating steps in the tub wall

Cost indication:
€500 – €1,500

6. Decks, walkways or wooden terrace

Application:
Increases comfort around the pond, ideal as a seating or sunbathing area.

Materials:
Hardwood, thermally modified wood, composite

Cost indication:
€250 – €500 per m²

7. Canopy or shade structure

Application:
Provides shelter from sun, rain, or prying eyes.

Options:

• Pergola
• Slatted roof
• Loose shade cloths

Cost indication:
€2,000 – €10,000 depending on construction

8. Cover or nets (autumn/winter)

Application:
Limits leaf fall in autumn and protects against dirt or animals.

Types:

• Loose cover nets
• Custom sliding or roller covers

Cost indication:
€300 – €2,500

9. Water features and fountains

Application:
Decorative, sound-absorbing and stimulates the oxygen content of the water.

Cost indication:
€500 – €3,000, depending on the system

10. Pool house, shower or changing room

Application:
Functional extension for comfort, storage, and privacy.

Cost indication:
Simple outdoor facility from €3,500
Full-fledged pool house or wooden outbuilding from €10,000 – €25,000+

11. Sunken lounge or integrated relaxation zone

Application:
Creates an additional experiential area at the edge of the swimming pond.

Cost indication:
Highly dependent on design, average €5,000 – €15,000

Summary table – Extra options and indicative prices (2025)

Conclusion

With extra options, a natural swimming pond can be adapted to personal preferences, seasonal use, and comfort needs. Many extensions can also be realized at a later stage, allowing for phased investment. It is advisable to consider technical connections, power points, and space for potential future expansion during the design phase.

A natural swimming pond offers a sustainable alternative to the traditional swimming pool, combining a natural experience with high-quality swimming. While the construction requires a targeted investment, it offers both functional and ecological benefits in the long term.

1. Chemical-free swimming

• Natural swimming ponds work on the basis of biological filtration (plants and substrate), without the use of chlorine or other chemical agents.
• The water is kinder to the skin, eyes, airways, and the environment.

Advantage: suitable for people with allergies or sensitivities; no odor or irritation complaints.

2. Low operating and maintenance costs

• No need to purchase chemicals or expensive automatic dosing systems.
• Biological filtration requires less energy than conventional swimming pool technology.
• Maintenance is limited to pruning plants, checking water balance, and periodically cleaning pumps.

Advantage: significantly lower annual costs than a classic swimming pool.

3. Aesthetic added value for the garden

• Natural appearance that visually matches any garden architecture.
• Instead of an artificial pool shell, an integrated landscape element is created.
• Planting, bank zones, and decking enhance the experience and the garden image.

Advantage: Increases the visual value and tranquility in the garden.

4. Ecologically Responsible

• Natural swimming ponds provide a habitat for insects, birds, and amphibians.
• Support biodiversity and contribute to a healthy water cycle.
• There is no discharge of chemically treated water into the sewer or surface water.

Advantage: sustainable and environmentally friendly, even with long-term use.

5. Suitable for year-round use

• Unlike a swimming pool, a natural swimming pond does not need to be covered or drained in winter.
• Can serve as a pond, landscape feature, or water element outside the swimming season.
• Also forms an aesthetically pleasing and functional element in the garden during winter.

Advantage: visual and functional value in all seasons.

6. Flexibility in design and layout

• Free choice of shape, dimensions, depth and zoning (swimming area/filter zone).
• Possibility of integration with decks, terraces, stairs, planting and natural separations.
• Also suitable for irregular or sloping gardens.

Advantage: custom-made possible without technical limitations of prefab pools.

7. Long lifespan

• When using high-quality foil (EPDM) or HDPE construction, the lifespan is at least 20 to 40 years.
• Less wear and tear on pipes, pumps, and technology due to a more natural circulation process.

Advantage: sustainable investment with low depreciation pressure.

8. Increasing the value of real estate

• A professionally landscaped swimming pond with high-quality finishing and garden integration can increase the aesthetic and financial value of the property.
• Potential buyers appreciate the combination of luxury and sustainability.

Advantage: positive influence on the saleability and appraisal value of the property.

9. Lower environmental impact than traditional swimming pools

• No chemicals, less energy consumption, no polluting discharge.
• Circular use of water with natural purification.
• No CO₂ emissions from the production of chlorine or maintenance products.

Advantage: responsible use without increasing your ecological footprint.

Conclusion

A natural swimming pond is more than just an alternative to a swimming pool: it is a future-oriented choice for a natural water experience, ecological balance, and added visual value. With its low operating costs, long lifespan, and chemical-free operation, a natural swimming pond offers a sustainable and luxurious solution for any garden. Investing in a natural swimming pond is a conscious choice for nature, quality, and tranquility.

The creation of a swimming pond requires careful preparation, technical expertise, and a phased approach. Unlike a classic swimming pool, the emphasis is on ecological filtering, natural integration, and a balance between aesthetics and technology. The step-by-step plan below provides insight into the entire process from orientation to completion.

1. Orientation and Requirements Specification

• Determine the purpose of the swimming pond: recreational, aesthetic, ecological
• Choose the location in the garden (sun exposure, wind, privacy, water flow)
• Determine size, depth, and shape
• Preferences regarding finishing, materials, and edge zones
• Possible combination with terrace, pool deck, or garden design

Result: overview of requirements, preferences, and budget indication

2. Design and Technical Preparation

• Developing a design with a swimming zone and filter zone
• Choosing a filter system (biological, mechanical, or hybrid)
• Determining materials (EPDM, HDPE, concrete, planting)
• Working out technical details: pumps, pipes, power supply
• Checking for a permit requirement with the municipality or water board

Note: a permit is usually not required, but may be mandatory for large ponds or in protected areas

3. Groundwork and Excavation

• Excavation of swimming area and separate filter zones
• Leveling and preparing soil and slopes
• Optional: Application of stabilized sand or foundation layer
• Removal or reuse of excavated soil

Crane costs may vary depending on location and accessibility

4. Applying Foil or Placing HDPE Construction

• Apply EPDM foil or HDPE tub in the swimming zone and filter zone
• Weld or glue seams for watertightness
• Press against slopes, secure edges
• Place penetrations and built-in parts for pipes and technology

Errors in this phase can cause leaks and are costly to repair

5. Installation of Filter System and Technology

• Laying of pipes between swimming area and filter zone
• Installation of pumps, skimmers, possible UV units or drum filter
• Electrical connections and safety according to standard
• Testing of water circulation and flow

Important: a well-adjusted water balance prevents stagnant water and algae formation

6. Filling the Pond and Planting

• Gradual filling with clean tap water or filtered spring water
• Applying substrate (lava rock, gravel) in filter zones
• Planting oxygenating plants, marginal plants, and floating plants
• Designing transition zones and natural separations

Tip: choose only pond-suitable plants for stable filtering

7. Edge Finishing and Garden Adaptation

• Installation of decking, stairs, walkways, or stone edging
• Finishing of banks with pebbles, posts, gravel, or wooden revetment
• Adaptation of the garden structure around the pond
• Optional installation of outdoor lighting, roofing, or accessories

Finishing largely determines the final appearance and user comfort

8. Delivery and Instruction

• Checking flow, filtration and water level
• Instruction on maintenance, pruning, winter preparation and water quality
• Handover of manual, warranty and aftercare plan
• Optional: drawing up an annual maintenance contract

Indicative Lead Time

Conclusion

Building a swimming pond is a multidisciplinary project where technology, ecology, and aesthetics come together. Proper preparation, a good design, and professional execution ensure years of enjoyment with minimal environmental impact. Following the step-by-step plan carefully prevents mistakes, controls costs, and guarantees a sustainable water experience.

A natural swimming pond is a sustainable and aesthetic addition to the garden, but requires a significant investment. By making conscious choices in design, execution, and finishing, the overall cost can be significantly reduced. The overview below offers concrete saving strategies, categorized by project phase.

1. Choose a simple shape

• Rectangular or symmetrical ponds are easier to create than organic or complex shapes.
• Less waste of liner or HDPE and more efficient installation of pipes and edge structures.

Savings: up to 10–15% on material and labor costs

2. Limit the surface area

• Opt for a compact swimming zone and optimize the ratio with the filter zone.
• A smaller pool with good depth and filtration often offers the same user comfort at a lower installation cost.

Savings: up to €500 – €1,000 per m² of avoided surface area

3. Work with EPDM liner instead of HDPE

• EPDM is cheaper in material and easier to install in smaller or simple ponds.
• HDPE is more durable, but requires specialist processing.

Savings: average €3,000 – €7,000 for medium-sized ponds

4. Opt for a passive biological filter zone

• A natural lava zone with plants is cheaper than a technically filtered system.
• Lower installation costs and lower energy consumption in the long run.

Savings: up to €4,000 in initial setup costs

5. Avoid unnecessary extras at the start

• Postpone luxury elements such as heating, lighting, automatic control or a cover until a later date, if necessary.
• The basic pool also functions without these extensions.

Savings: €1,000 – €10,000 depending on the chosen options

6. Work with standard materials for edging

• Natural stone or hardwood are more expensive than concrete tiles, fired pavers or simple decking.
• Choose functional and durable, but avoid exclusive materials in the first phase.

Savings: €50 – €150 per linear meter of edge

7. Combine with garden projects or reuse materials

• If the garden is being redeveloped anyway, machinery, earthmoving, and landscaping can be combined.
• Reusing existing stones, decking, or planting reduces material costs.

Savings: depending on the situation €1,000 – €5,000 or more

8. Planning outside the peak season

• Construction in autumn or winter (provided the soil allows) can lead to sharper prices from contractors.
• Less pressure on suppliers and better availability of staff.

Savings: 5% to 10% on the total budget

9. Compare multiple quotes

• Preferably request three quotes from specialized parties with experience in swimming ponds.
• Pay attention not only to the price, but also to included components, guarantees, and delivery agreements.

Savings: €2,000 – €10,000 depending on project size and competition

10. Consider partial self-employment

• Excavation, placement of bank planting or finishing the garden can be (partially) carried out by yourself.
• Technical parts such as foil placement and pumps do require craftsmanship.

Savings: depending on work €1,000 – €8,000

Conclusion

With a thoughtful approach, clear priorities, and smart choices in design and execution, a swimming pond can be realized within a manageable budget. The biggest savings are achieved by limiting the size, choosing a simple shape, avoiding technical overkill, and phasing in luxury elements. Professional advice at the beginning of the project prevents unexpected costs in the final phase.