What size excavator do I need for a pool?

## What Size Excavator Do You Need for Pool Excavation? Choosing the right excavator size for pool excavation is one of the most common questions BuildHire receives from Sydney homeowners and pool builders. The answer depends on four factors: pool size, site access, soil conditions, and your timeline. ### The Most Common Choice: 1.7T Mini Excavator For standard residential pools in Sydney — typically 6–8 metres in length, 3–4 metres wide, and 1.5–1.8 metres deep — the 1.7T mini excavator is the most popular choice. Here's why: **Access:** The 1.7T is 1,300mm wide, which fits through standard residential side gates (typically 1,200–1,500mm wide). This is the critical constraint for most Sydney backyards. **Digging depth:** The 1.7T has a maximum dig depth of 2,400mm — sufficient for most residential pool depths of 1,500–1,800mm. **No licence required:** The 1.7T weighs under 3 tonnes, so no High Risk Work Licence is required in NSW. Owner builders and pool builders without an HRWL can operate it legally. **Efficiency:** The 1.7T can excavate a standard residential pool in 1–2 days, depending on soil conditions. ### When to Choose the 3.5T Excavator The 3.5T excavator is the better choice when: - **Pool is larger than 8 metres** — the 3.5T's larger bucket (200L vs 80L) moves material faster - **Soil is difficult** — clay, compacted fill, or rock requires the 3.5T's greater digging force - **Timeline is tight** — the 3.5T can excavate a standard pool in half the time of the 1.7T - **Site access allows it** — the 3.5T is 1,800mm wide and requires a wider gate or driveway access Note: The 3.5T requires a High Risk Work Licence (HRWL) in NSW. Ensure you or your operator holds the appropriate licence before hiring. ### When to Choose Smaller Machines For pools with very tight access — gates under 1,200mm, narrow side passages, or restricted backyards — the 1T (900mm wide) or 0.8T (750mm wide) mini excavators may be the only option. These machines take longer to excavate but can access sites that larger machines cannot reach. ### Soil Conditions in Sydney Sydney's geology varies significantly by suburb: **Sandy soil (Eastern Suburbs, Northern Beaches):** Easy to excavate. The 1.7T is efficient and fast. **Clay soil (Western Sydney, Hills District):** Harder to excavate. The 1.7T can handle it but takes longer. The 3.5T is more efficient. **Sandstone rock (Inner West, North Shore, parts of Western Sydney):** Rock breaking may be required. The 3.5T with a hydraulic rock breaker attachment is the standard approach. Contact BuildHire about rock breaker attachments. **Fill material (new subdivisions, former industrial land):** Unpredictable. Inspect the site before choosing a machine size. ### Practical Checklist Before Hiring Before booking your excavator for pool work, confirm: 1. Gate width (measure the narrowest point of access) 2. Pool dimensions (length, width, depth) 3. Soil type (ask a neighbour or check council records) 4. Your licence status (under 3T = no licence; 3T+ = HRWL required) 5. Spoil removal plan (where will the excavated soil go? You'll need a tipper truck or skip bins) BuildHire can deliver both an excavator and a tipper truck for pool excavation projects. Call 1300 157 882 to discuss your project.