DIY Inground Plunge Pool: A Step-by-Step Guide to Building Your Backyard Oasis

Plunge Pools Gold Coast helps homeowners across the Gold Coast design and build beautiful plunge pools. With years of experience and a commitment to quality, we provide expert advice and services to build you dream plunge pool.

This guide covers everything you need to know, from selecting the perfect design to step-by-step construction instructions and maintenance tips. Whether you’re experienced or trying this for the first time, you’ll find the information clear and easy to follow.

Understanding What an Inground Plunge Pool Is

An inground plunge pool is a compact, shallow pool built directly into the ground. It offers a relaxing and cooling space while using minimal yard area. Cost-effective and low-maintenance, it’s ideal for small backyards and can be customised into a serene retreat or a fun outdoor feature for families.

Benefits of an Inground Plunge Pool

• Space-Saving Design: Perfect for small or limited outdoor spaces.
• Cost-Effective: More affordable to install and maintain than full-sized pools.
• Customisable: Can include features like jets, heating, or LED lighting for added functionality and style.

Key Considerations Before Starting

Planning your DIY plunge pool project is the foundation of success. Evaluate important factors such as yard size, soil type, and drainage. Ensure you review local regulations, secure permits, and set a realistic budget before breaking ground to avoid delays or complications:

1. Assess Your Yard

• Check the available space and soil condition.
• Locate utilities and ensure proper drainage options.
• Plan for proximity to water and power sources.

2. Understand Local Regulations

• Obtain necessary council permits.
• Ensure compliance with safety laws, including fencing and gate requirements.

3. Set a Realistic Budget

• Consider material, equipment, and tool costs.
• Account for unexpected expenses like soil removal or equipment hire.

4. Choose Your Pool Type

• Inground: This type of pool offers a sleek, seamless look.
• Semi-Inground: Easier to install, especially on sloped land.
• Above Ground: Cost-effective and quicker to build.

Designing Your Perfect Plunge Pool

Creative Shape and Size Ideas

• Compact rectangles for modern aesthetics.
• Circular designs for a classic look.
• Freeform shapes for a natural, lagoon-style feel.

Modern Finishes

• Tiled Interiors: Glossy mosaics or matte finishes.
• Natural Stone: Timeless and durable.
• Plastered Surfaces: Affordable and sleek.

Landscaping Integration

• Surround with greenery for a tropical vibe.
• Add decking or paving for functionality.
• Use lighting for ambiance and safety at night.

Tools for Visualisation

• Try free 3D pool design software to map out your ideas before committing.

Materials and Tools Checklist

Recommended Materials

• Concrete: Durable and versatile for custom designs.
• Fibreglass: Low-maintenance and pre-shaped.
• Vinyl Liner: Budget-friendly but requires regular replacement.

Essential Tools

• Shovels, wheelbarrows, and excavation equipment.
• Concrete mixers, waterproofing solutions, and tile adhesive.
• Plumbing tools for pipework and filtration systems.

Eco-Friendly Options

• Recycled concrete or composite materials.
• Solar-powered filtration and heating systems.

Building Your DIY Inground Plunge Pool

Step 1 – Site Preparation and Excavation

Preparing the site is the first step in building your in-ground plunge pool. Proper site preparation ensures the pool remains stable, functional, and free from issues like uneven settling or drainage problems.

1. Clear the Area

• Remove grass, rocks, and debris from the selected location.
• Use stakes and string to mark the pool’s outline, ensuring the shape and size align with your design.

2. Check the Ground

• Test the soil for stability. Address loose sand or clay by adding stabilisation materials if needed.
• Confirm the area is level using a spirit level.

3. Excavation

• Equipment Options:
  • Wet Hire: Rent an excavator with a professional operator for accuracy and speed.
  • Dry Hire: Rent the equipment and operate it yourself if experienced.
• Carefully dig within the marked outline, maintaining the correct depth and shape.
• Dispose of excess soil responsibly or use it for landscaping projects.

Pro Tips:

• Avoid over-digging as it is easier to remove soil later than refill it.
• Install temporary safety fencing around the site, as required by local Australian regulations.

Step 2 – Laying the Foundation

The foundation is crucial to ensuring your plunge pool remains stable and free of structural issues like cracks or leaks.

1. Prepare the Base

• Lay a 10 cm (4-inch) layer of compacted gravel at the bottom of the excavation.
• This creates a solid, stable surface for the concrete.

2. Add Rebar for Reinforcement

• Place steel rebar in a grid pattern over the gravel for added strength.
• Use rebar chairs to elevate the grid slightly, allowing concrete to flow underneath.

3. Pour the Concrete Pad

• Mix and pour concrete evenly over the gravel and rebar.
• Use a trowel to smooth the surface, ensuring it’s level and even.
• Allow the concrete to cure completely (2–3 days) before proceeding to the next step.

Step 3 – Constructing the Pool Walls

The pool walls form the structure and can be built using concrete, bricks, blocks, or prefabricated panels.

1. Concrete Walls

• Build wooden forms around the pool perimeter.
• Pour concrete into the forms, ensuring even distribution and no air pockets.
• Remove the forms after the concrete cures (1–2 days).

2. Brick or Block Walls

• Lay bricks or concrete blocks on the foundation, securing each layer with mortar.
• Backfill any gaps with additional concrete for stability.

3. Prefabricated Panels

• Follow the manufacturer’s installation instructions to assemble the panels.
• Secure the panels with bolts or brackets for long-term durability.

Waterproofing the Walls

• Apply a waterproof render or sealant to the walls to prevent leaks.
• Inspect for weak spots or cracks and address them before moving forward.

Step 4 – Plumbing and Filtration Installation

Proper plumbing ensures water circulates effectively, keeping your plunge pool clean and safe.

1. Install Drainage and Filtration Systems

• Position pool drains at the bottom to promote efficient water flow.
• Connect skimmers and return jets to the filtration system for debris removal and water circulation.

2. Pipework

• Use durable PVC pipes designed for swimming pools, ensuring all joints are sealed tightly.
• Include plumbing for additional features like spa jets, waterfalls, or heating systems, if required.

3. Electrical Setup

• Run electrical cables for lights, pumps, and heaters as needed.
• Engage a licensed electrician to handle wiring and ensure compliance with Australian safety standards.

Step 5 – Finishing the Interior

The interior finish enhances the pool’s appearance and provides a waterproof layer.

1. Apply Plaster or Epoxy Paint

• Use a plaster coating to create a smooth and waterproof surface.
• Alternatively, apply epoxy paint for a long-lasting, vibrant finish.

2. Tile the Pool (Optional)

• Select water-resistant tiles for a premium look.
• Apply tile adhesive evenly and grout carefully, filling gaps for a uniform surface.

3. Let It Cure

• Allow the plaster, paint, or tiles to cure fully as per manufacturer instructions before filling the pool with water.

Enhancing Your DIY Plunge Pool

Once your plunge pool is built, thoughtful additions like a well-designed deck around your pool can elevate its appeal and functionality. Combine stylish decking with comfortable seating and ambient lighting to create a luxurious backyard escape that enhances your lifestyle and adds value to your home.

1. Decking Options

• Wood Decking: Provides a natural, warm aesthetic. Ensure the wood is treated for water resistance.
• Composite Decking: Durable and low maintenance, making it ideal for outdoor use.
• Concrete or Stone Pavers: Perfect for a modern, sleek look with added slip resistance.

2. Seating and Shade

• Seating: Add sun loungers, built-in benches, or outdoor chairs for comfort and relaxation.
• Shade: Protect yourself from the harsh Australian sun with pergolas, shade sails, or large umbrellas.

3. Lighting Ideas

• Underwater Lights: Install LED lights to create a magical ambiance at night.
• Pathway Lighting: Use solar-powered fixtures to illuminate walkways and highlight landscaping.
• Deck Lighting: Add recessed lights for both safety and style.

Adding Eco-Friendly Features

1. Solar Heating Systems

• Install rooftop solar panels to naturally warm your pool and reduce energy costs.

2. Saltwater Chlorination

• Use a saltwater system for gentler water that is kinder to skin and eyes.
• Reduces the need for frequent chemical adjustments.

3. Energy-Efficient Pumps

• Use variable-speed pumps that adjust power according to pool use, saving electricity.

4. Water-Saving Techniques

• Use a pool cover to minimise evaporation.
• Install a water recirculation system to reduce waste during cleaning.

Customising for Fitness and Relaxation

Your plunge pool can be tailored to support exercise, relaxation, and aesthetic appeal.

1. Exercise Features

• Install resistance jets for swimming or water-based workouts in a compact space.
• Add grab bars or steps for accessibility and low-impact exercises.

2. Relaxation Elements

• Integrate spa jets in one section for therapeutic hydrotherapy.
• Install a heating system to enjoy your pool comfortably all year round.

3. Landscaping for Tranquillity

• Surround your pool with native Australian plants to create a lush, low-maintenance tropical vibe.
• Add features like small waterfalls or fountains for soothing sounds and visual appeal.

Maintenance and Troubleshooting

Regular maintenance keeps your plunge pool clean, safe, and long-lasting while reducing the need for expensive repairs.

1. Essential Cleaning Tools

• Skimmers: Remove floating debris like leaves and bugs daily.
• Pool Vacuums: Clean the floor and walls weekly.
• Brushes: Scrub tiles and walls to prevent algae buildup.

2. Cleaning Schedule

• Daily: Skim the surface and empty skimmer baskets.
• Weekly: Vacuum, brush surfaces, and test water chemistry.
• Monthly: Backwash filters and inspect equipment for wear.
• Seasonal: Deep clean or drain before winterising.

Balancing Pool Chemistry

1. Key Chemical Levels

• pH Levels: Maintain between 7.2 and 7.6 for comfort and equipment protection.
• Chlorine or Sanitiser: Keep adequate levels to prevent bacteria and algae.
• Alkalinity: Stabilise pH by maintaining levels between 80–120 ppm.
• Calcium Hardness: Keep between 200–400 ppm to protect surfaces and equipment.

2. Testing and Adjusting

• Test water weekly using a reliable testing kit.
• Adjust pH, chlorine, or alkalinity with suitable chemical products as required.
• Shock the pool every 1–2 weeks to eliminate bacteria and organic contaminants.

Pro Tip:
Switching to saltwater chlorination simplifies maintenance and provides softer, gentler water.

Troubleshooting Common Issues

1. Leaks

• Symptom: Unexplained water loss beyond normal evaporation.
• Solution: Inspect plumbing, seams, and skimmer areas for cracks. Repair using waterproof epoxy or professional sealants.

2. Algae Growth

• Symptom: Green or slimy water, or visible patches on walls.
• Solution: Shock the pool, scrub affected areas, and ensure the filter system is functioning properly.

3. Cloudy Water

• Symptom: Water appears murky or unclear.
• Solution: Test and adjust pH and chlorine levels, clean filters, and ensure proper water circulation.

4. Malfunctioning Pump or Filter

• Symptom: Low water flow or ineffective debris removal.
• Solution: Check for blockages in the pump basket or filter. Clean or replace filters as required.

5. Cracked Tiles or Walls

• Symptom: Visible cracks or missing tiles.
• Solution: Repair using waterproof adhesive and grout. Seal cracks with epoxy resin to prevent further damage or leaks.

Cost Breakdown and Time Management

Understanding the expenses and time involved helps you plan and stay within budget.

1. Itemised Breakdown

Disclaimer:
The cost estimates provided are for informational purposes only and are based on general industry standards and averages. Actual costs may vary depending on location, material choices, labour rates, and specific project requirements. Always consult local professionals and suppliers for accurate quotes tailored to your project.

2. Budget-Friendly Tips

• Reuse Excavated Soil: Repurpose for landscaping to save on disposal costs.
• Shop Smart: Look for end-of-season sales on pool materials and tools.
• DIY Where Possible: Handle tasks like tiling and cleaning instead of outsourcing.

Creating a Realistic Timeline

1. Typical Project Phases

2. Managing Delays

• Permits: Apply early to avoid waiting on approvals.
• Weather: Plan for construction during dry seasons to avoid rain delays.
• Supply Chain: Order materials in advance to mitigate shipping disruptions.

Pro Tip for Cost Management

Track your expenses using a spreadsheet to stay on top of your budget. Adjust non-essential features like decking or decorative tiling if costs exceed your initial plan.

Conclusion

Building a DIY inground pool is a cost-effective way to create a personal backyard retreat. With proper planning, the right tools, and clear steps, you can enjoy a pool that offers relaxation, fitness, and fun for years to come.

At Plunge Pools Gold Coast, we are the trusted pool builder helping homeowners build their dream pool. If you need help from professionals, we’re here for you—whether you need guidance, quality materials, or full project support, our team is ready to ensure your success.

Contact Plunge Pools Gold Coast now and bring your vision to life!

People Also Ask

1. How deep should a plunge pool be?

A plunge pool is usually 1.2 to 1.5 metres deep. This depth is perfect for lounging, cooling off, and low-impact exercises while keeping water and maintenance costs low.

2. What are the most common mistakes when building a DIY plunge pool?

Mistakes include poor site preparation, skipping waterproofing, using unsuitable materials, and failing to secure permits. Follow detailed plans, use proper materials, and check local regulations to ensure safety and durability.

3. Can I build a plunge pool without professional help?

Yes, building a plunge pool is possible with proper tools, research, and planning. However, professional help for tasks like plumbing and electrical work ensures compliance with safety codes.

4. How do I waterproof a DIY inground plunge pool?

Use waterproof concrete, apply a sealant or epoxy coating, and seal all seams thoroughly. These steps prevent leaks and help extend the pool’s life.

5. What is the difference between an inground and semi-inground plunge pool?

An inground plunge pool is fully submerged, creating a seamless appearance. A semi-inground pool is partially above ground, making it easier to install on sloped areas while maintaining an attractive design.