Gabion Retaining Wall Cost: Baskets, Rock Fill, and Installation

Gabion Retaining Wall Cost in Melbourne

Gabion retaining walls consist of wire mesh baskets filled with rock, stone, or recycled concrete. They have become increasingly popular across Melbourne for their industrial aesthetic, excellent drainage properties, and structural versatility. If you are considering a gabion wall, here is a complete cost guide covering baskets, fill materials, and installation.

Gabion Basket Costs

Gabion baskets are typically made from galvanised or galfan-coated steel wire mesh. They come in standard sizes and are assembled on site before being filled with rock.

Standard gabion baskets (1m x 1m x 0.5m): $40 – $80 each
Large gabion baskets (2m x 1m x 1m): $80 – $160 each
Curved or custom-shaped baskets: $100 – $250 each depending on specifications
Mattress gabions (flat, wide baskets for base layers): $60 – $120 each

Galfan-coated baskets cost slightly more than standard galvanised options but offer significantly better corrosion resistance, making them the preferred choice for permanent retaining walls.

Rock Fill Costs

The rock fill is typically the largest single material cost in a gabion wall project. Costs vary depending on rock type and availability in your area.

Bluestone (basalt): $80 – $140 per tonne, the most common fill in Melbourne
Granite: $100 – $180 per tonne, available in various colours
River rock: $120 – $200 per tonne, creates a decorative finish
Recycled concrete: $30 – $60 per tonne, the most affordable option
Sandstone: $100 – $160 per tonne, warm tones suit many gardens

A standard one-metre-high gabion wall requires approximately 1.5 to 2.5 tonnes of rock per lineal metre, depending on basket dimensions and rock size.

Total Installed Cost per Metre

When you combine baskets, rock fill, site preparation, drainage, and labour, the total installed cost of a gabion retaining wall in Melbourne typically falls within these ranges:

Low wall (up to 600mm): $250 – $400 per lineal metre
Medium wall (600mm to 1m): $350 – $550 per lineal metre
Tall wall (over 1m, engineered): $500 – $800 per lineal metre

These prices assume reasonable site access for delivery trucks and machinery. Restricted access sites can add 20 to 40 percent to labour costs.

Additional Costs to Consider

Engineering and Permits

In Victoria, retaining walls over one metre in height require a building permit and typically need engineering design. The Victorian Building Authority (VBA) oversees these requirements. Engineering for a gabion wall typically costs $1,500 to $3,500, and council permit fees range from $500 to $1,500 depending on your municipality.

Site Preparation

Gabion walls require a level, compacted base. If significant excavation is needed, expect to pay $50 to $150 per lineal metre for earthworks. Soil disposal costs may also apply if spoil cannot be retained on site.

Drainage

One advantage of gabion walls is their inherent permeability, which allows water to pass through the rock fill. However, proper drainage behind the wall is still recommended, including agricultural pipe and geotextile fabric, costing approximately $30 to $50 per lineal metre.

Project Cost Examples

Garden edge wall (6m long, 500mm high, bluestone fill): $2,000 – $3,200
Driveway wall (8m long, 900mm high, granite fill): $3,500 – $5,500
Boundary wall (12m long, 1.5m high, engineered): $8,000 – $14,000

Use our retaining wall cost calculator to get a quick estimate based on your wall dimensions and preferred materials. For a comprehensive look at gabion pricing, visit our gabion wall cost page.

Connect with Gabion Wall Specialists

Gabion walls require precise base preparation and careful rock placement for a professional finish. We connect you with licensed retaining wall builders experienced in gabion construction across Melbourne. Find a gabion wall specialist and get detailed quotes for your project.