Can I Reshape a Garden Berm by Hand Without Earthmoving Equipment?

Yes, reshaping a garden berm by hand is absolutely achievable for most homeowners — provided the berm is modest in size and you plan the job carefully. Small to medium berms (generally under half a metre in height change and covering a manageable area) can be reshaped using basic hand tools over a weekend or two. Larger or steeper berms, or those near boundaries, retaining walls, or drainage infrastructure, may need professional earthmoving equipment and possibly a building consent.

What Is a Garden Berm?

A berm is a raised mound or ridge of soil used in landscaping to add visual interest, improve drainage, screen views, or define garden zones. In NZ, berms are popular in both residential gardens and rural properties. They're often planted with groundcovers, shrubs, or ornamental grasses to stabilise the soil.

Tools You'll Need

For hand reshaping, gather the following before you start:

• Spade or border spade – for cutting and moving soil
• Garden fork – for loosening compacted earth
• Wheelbarrow – essential for moving soil around the site
• Rake – for levelling and shaping the final surface
• Tamper or the back of a spade – to firm up the new shape
• Pegs and string line – to mark out your intended profile
• Spirit level or laser level – to check gradients, especially for drainage
• Measuring tape – for accuracy

You'll find most of these at Bunnings or Mitre 10.

Planning Before You Dig

Check for Underground Services

Before moving any soil, call or go online to check for underground services — water pipes, gas lines, electrical cables, and telecommunications infrastructure can all run through residential sections. In NZ, you can contact your local council or use the free Before U Dig service to identify buried utilities. Striking a buried service can be extremely dangerous and costly.

Consider Drainage

Berms affect how water moves across your section. Reshaping one incorrectly can direct stormwater toward your house foundations, your neighbour's property, or the road — all of which can create legal and structural problems. NZ Building Code clause E1 (Surface Water) requires that stormwater is managed so it doesn't cause damage or nuisance. Think carefully about where water will flow after you reshape, and ensure it drains away from structures. BRANZ has useful guidance on site drainage principles.

Do You Need a Building Consent?

This is an important question. Under the Building Act 2004 and its Schedule 1 exemptions, minor earthworks for garden landscaping are generally exempt from building consent — but there are limits. If your berm reshaping involves:

• Retaining more than 1.5 metres of ground height difference
• Work near a boundary (rules vary by council)
• Significant changes to stormwater flow
• Earthworks on a steep or unstable slope

…then a consent or resource consent under the Resource Management Act (RMA) may be required. Rules vary between councils, so always check with your local council before starting. You can find general guidance at MBIE Building Performance.

How to Reshape a Berm by Hand: Step by Step

1. Mark out your new shape using pegs and string. Walk around it and visualise the finished profile from multiple angles.
2. Remove any existing plants carefully. Set them aside in a shaded spot with their roots moist if you plan to replant them.
3. Strip the turf or groundcover with a spade, cutting in sections for easier handling.
4. Move soil from high spots to low spots using your spade and wheelbarrow. Work in manageable loads to avoid back strain.
5. Build up the new shape gradually, adding soil in layers of around 150–200 mm and firming each layer before adding the next. This reduces settling later.
6. Check your gradients with a spirit level as you go. Aim for gentle slopes (no steeper than 1:3 for hand-mown grass, or 1:2 for planted groundcover) to prevent erosion.
7. Firm the surface with a tamper, then rake smooth.
8. Replant or reseed promptly — bare soil erodes quickly, especially in NZ's variable weather. Consider a fast-establishing groundcover or erosion-control matting on steeper faces.

Soil and Planting Tips

If you're importing additional soil to build up the berm, use a good-quality garden mix or topsoil from a reputable local supplier. Avoid using subsoil or clay-heavy fill as the top layer, as it drains poorly and is hard to plant into. Mulching the finished berm helps retain moisture and suppress weeds while new plants establish.

For planting on slopes, choose species with strong root systems — native groundcovers like Libertia or Carex species work well in many NZ conditions and help bind the soil.

Safety Notes

• Protect your back — lift with your legs, not your back, and take regular breaks. Earthmoving by hand is physically demanding.
• Wear sturdy footwear and gloves at all times.
• Be cautious on wet days — wet soil is heavier and slopes become slippery.
• If you discover any buried pipes or cables while digging, stop immediately and contact the relevant utility provider.

For electrical safety information, see WorkSafe NZ.

When to Call a Professional

Hand reshaping has its limits. Consider hiring a qualified earthmover or landscaper if:

• The berm is large (moving more than a few cubic metres of soil)
• The slope is steep or the soil is unstable
• You need to install or modify drainage infrastructure
• The work is near a retaining wall, boundary, or building foundation
• You're unsure about consent requirements

A professional earthmover has the equipment and expertise to complete the job safely, efficiently, and in compliance with NZ regulations. You can find qualified local earthmovers and landscapers on tradedirectory.co.nz.

Sources & Further Reading

• MBIE Building Performance – Building Consent Exemptions
• BRANZ – Site and Drainage Guidance
• WorkSafe NZ – Health and Safety for DIY
• Bunnings – Garden Tools and Landscaping Supplies
• Mitre 10 – Landscaping and Garden Range