Can I Excavate My Own Swimming Pool Hole to Save Money?

Technically, yes — as a homeowner in New Zealand you can excavate your own swimming pool hole, and many people consider it as a way to trim costs on what is already a significant project. However, before you hire a mini excavator or start digging, there are real safety risks, consent requirements, and practical limitations that could end up costing you more if you get it wrong.

Do You Need a Building Consent First?

In most cases, installing a swimming pool requires a building consent from your local council. This is because pools are subject to the NZ Building Code — particularly Clause F9 (Restricting Access to Residential Pools), which sets strict fencing and barrier requirements to protect young children.

While some minor earthworks may fall under Schedule 1 exemptions, the pool structure itself almost certainly won't. You should always confirm with your local council before breaking ground. Starting excavation without the correct consent can result in costly stop-work orders or forced reinstatement.

For guidance on building consents and what work is exempt, visit MBIE Building Performance.

What Are the Real Risks of DIY Pool Excavation?

Excavation looks straightforward but carries serious hazards:

• Underground services — Power cables, gas lines, water pipes, and telecommunications cables can run through your property. Striking these can be fatal or extremely costly. Always call Before U Dig (0800 248 344) to get your underground services located before any digging begins.
• Trench and excavation collapse — Unsupported excavations deeper than 1.5 metres are a recognised hazard under NZ law. A pool hole is typically 1.5–2.5 metres deep, meaning the walls can collapse without warning, especially in sandy, wet, or loose soils. WorkSafe NZ has clear guidance on excavation safety that applies to homeowners too.
• Soil type surprises — Rock, high water tables, or unstable fill can dramatically change the scope and cost of the job. A professional excavator will recognise these conditions quickly; an inexperienced operator may not.
• Equipment damage — Hired mini excavators are powerful machines. Inexperienced operators can damage fences, retaining walls, driveways, or neighbouring property.

What Equipment Would You Need?

For a standard residential pool (say, 8 m × 4 m × 1.8 m deep), you're looking at removing roughly 50–80 cubic metres of soil — sometimes more depending on shape and depth. That's a significant volume.

Hire costs for a 3–5 tonne excavator vary by region and duration — as a rough guide, expect to pay several hundred dollars per day for the machine alone, plus transport, fuel, and soil disposal costs. Disposal of excavated material is often underestimated; you'll need to arrange a legal dump site or find someone who wants fill.

What Can a Homeowner Legally Do?

General earthworks on your own property are not restricted work under NZ law in the same way that electrical or plumbing work is. You don't need a licence to operate a hired excavator on your own land. However:

• You are still responsible for health and safety under the Health and Safety at Work Act 2015.
• Any work near underground services must be done with extreme care.
• Your building consent conditions may specify that certain work must be carried out or inspected by qualified parties.
• If your property is on a steep site or near a boundary, additional engineering input may be required.

For electrical and plumbing connections to the pool (pump, lighting, heating), these are restricted trades and must be carried out by a licensed electrician registered with the Electrical Workers Registration Board and a licensed plumber registered with the Plumbers Gasfitters & Drainlayers Board. Do not attempt this work yourself.

Is It Actually Worth Doing It Yourself?

The honest answer depends on your situation. If you have some experience operating machinery, good access to your site, easy soil conditions, and a clear plan for disposing of spoil, you may save a meaningful amount. However, if your site has:

• Difficult access for machinery
• Rocky or waterlogged ground
• Slopes or retaining walls nearby
• Tight boundaries close to neighbours or structures

…then a professional excavator will almost certainly do the job faster, safer, and potentially cheaper once you factor in hire costs, your time, and the risk of mistakes.

When to Call a Professional

Hire a qualified excavation contractor if:

• You have no experience operating an excavator
• Your site has restricted access, slopes, or complex soil conditions
• You're unsure about underground service locations
• Your excavation will be deeper than 1.5 metres in loose or wet soil
• Your pool builder or engineer specifies professional earthworks

A professional excavator will also carry their own insurance, which protects you if something goes wrong. You can find experienced local excavation contractors on tradedirectory.co.nz to get quotes and compare your options.

Sources & Further Reading

• MBIE Building Performance — Building Consents
• WorkSafe NZ — Excavation Safety
• Electrical Workers Registration Board
• Plumbers Gasfitters & Drainlayers Board
• BRANZ — Building Research