Swimming Pond Conversions in Devon & Cornwall

Transform Existing Water Features Into Natural Swimming Ponds

Not every natural swimming pond needs to start from scratch.

Many existing ponds, lakes, reservoirs and even traditional swimming pools can be successfully converted into beautiful natural swimming environments.

In some cases, a conversion can offer significant cost savings compared to a completely new build. Existing excavations, structures and services can often be utilised, while poor-performing water features can be transformed into valuable recreational and landscape assets.

At SAS Aquatics, we assess each site individually to determine what can be retained, what should be upgraded and the most practical route to creating a safe, attractive and functional swimming pond.

Can My Existing Pond Be Converted?

One of the most common questions we receive is:

“Can we turn our existing pond into a swimming pond?”

The answer is often yes, but it depends on several factors.

Key considerations include:

• Water depth
• Water quality
• Existing liner condition
• Ground conditions
• Access
• Pond shape
• Surrounding landscape
• Intended level of use

Some ponds require only modest alterations, while others may need extensive reconstruction to achieve suitable swimming conditions.

A site assessment is usually the best place to start.

Types of Swimming Pond Conversion Projects

Existing Garden Ponds

Many ornamental ponds can be enlarged, reshaped and upgraded to create attractive swimming ponds.

Typical improvements include:

• Increased depth
• Improved access
• New liners
• Aquatic planting
• Filtration systems
• Landscaping

Estate Lakes & Farm Ponds

Larger ponds and lakes often provide excellent opportunities for natural swimming.

Potential improvements include:

• Dedicated swimming areas
• Beaches and access points
• Water quality improvements
• Habitat enhancement
• Safety features
• Regeneration zones

These projects often integrate well with wider estate management and biodiversity objectives.

Existing Swimming Pools

Traditional swimming pools can often be converted into natural or hybrid swimming ponds.

This approach can retain much of the existing structure while creating a far more natural appearance and swimming experience.

Potential upgrades include:

• Natural stone finishes
• Aquatic planting
• Biological filtration
• Gravel margins
• Wildlife-friendly features
• Reduced chemical dependency

Swimming pool conversions are becoming increasingly popular for clients seeking a more natural outdoor environment.

Reservoirs & Water Storage Features

Redundant reservoirs and agricultural water storage areas can sometimes be adapted for recreational use.

These projects require careful consideration of:

• Structural condition
• Water quality
• Safety
• Access
• Filtration requirements

When suitable, they can provide impressive swimming environments with relatively limited excavation requirements.

Former Quarries & Excavations

Existing excavations occasionally offer opportunities for larger-scale swimming pond projects.

Each site requires detailed assessment, particularly where groundwater, steep slopes or safety considerations are involved.

Fully Natural or Hybrid Conversion?

Most conversion projects follow one of two approaches.

Fully Natural Swimming Pond Conversion

Ideal for:

• Larger water bodies
• Estate lakes
• Farm ponds
• Wildlife-focused projects
• Retreat centres

Benefits include:

• Lower running costs
• Minimal technology
• Excellent biodiversity value
• Natural appearance

Hybrid Swimming Pond Conversion

Ideal for:

• Residential properties
• Existing swimming pools
• Holiday accommodation
• Smaller ponds
• Clients prioritising water clarity

Benefits include:

• Exceptional water clarity
• Improved water management
• Reduced maintenance
• More predictable performance

We can advise on the most appropriate approach during the design stage.

Common Issues We Encounter

Many existing ponds suffer from problems that make swimming unattractive or impractical.

Common issues include:

Excessive Silt

Older ponds often accumulate significant volumes of sediment over time.

This can reduce water depth, impact water quality and create poor swimming conditions.

Poor Water Quality

Nutrient build-up, algae growth and inadequate circulation are common challenges.

Solutions may include:

• Dredging
• Filtration upgrades
• Planting
• Habitat improvements
• Water management measures

Failing Liners

Many ponds and lakes eventually develop leaks due to liner failure or ground movement.

Where necessary, we can replace existing liners as part of a wider conversion project.

Unsuitable Depth Profiles

Swimming ponds require different depth profiles to many ornamental or agricultural ponds.

Reshaping is often required to improve usability and safety.

Difficult Access

Many older ponds lack suitable entry and exit points.

Swimming beaches, steps, jetties and boardwalks can all improve accessibility.

The Conversion Process

Initial Consultation

We discuss your goals, budget and expectations for the project.

Site Assessment

We assess:

• Existing structures
• Water supply
• Ground conditions
• Ecology
• Access
• Services

Design Development

A practical design is developed around the opportunities and constraints of the site.

Construction & Upgrades

Works may include:

• Excavation and reshaping
• Liner replacement
• Filtration installation
• Stonework
• Planting
• Boardwalk construction
• Habitat enhancement

Establishment

The system is allowed to mature and stabilise before reaching its full potential.

Typical Costs

Conversion projects vary enormously depending on the starting point.

As a broad guide:

Costs depend heavily on how much of the existing structure can be retained.

A site visit is generally required before accurate guidance can be provided.

Why Convert Instead of Rebuild?

In many situations, a conversion can:

• Reduce excavation costs
• Make use of existing infrastructure
• Preserve landscape character
• Reduce disruption
• Deliver a unique result
• Improve sustainability

However, not every existing water feature is suitable for conversion. Where a complete rebuild offers a better long-term outcome, we will advise accordingly.

Why Choose SAS Aquatics?

Our background in pond construction, restoration, lake management and aquatic habitats gives us a strong understanding of how existing water features function and how they can be improved.

We regularly assess leaking ponds, silted lakes, ageing water features and underperforming aquatic systems throughout Devon and Cornwall.

This experience allows us to identify practical solutions and determine whether conversion, refurbishment or complete reconstruction represents the best long-term investment.

Discuss Your Project

If you have an existing pond, lake, reservoir or swimming pool that you would like to transform into a natural swimming pond, we’d be happy to discuss the options.

Contact SAS Aquatics to arrange an initial consultation and site assessment.