Stormwater and Sewer Drainage Contractors

A sewer drain is likely found inside structures like homes or offices. It is responsible for carrying all the wastes and sewage from said structures towards treatment plants before being discharged. Meanwhile, storm drains are for the stormwaters during or after rainfall. This drainage system carries rainwater from roofs, driveways, footpaths, and roads. Soil, litter, and other organic materials and residues will also flow into stormwater drains. Their most notable difference is that wastewater from sewage drains are treated first before being released while stormwater goes straight to its final destination.

The sewer drainage system consists of the underground pipes in your homes. It will carry your waste and other sewerage from your kitchens, bathrooms, sinks, laundry and other plumbing units in your homes. As mentioned, wastewater from sewer drains will flow straight to treatment plants first before being discharged into respective waterways. When there is a leak in your sewer line, it can ramp up your water bill and create potential health hazards and stinky smells. To determine if you have leaking pipes, investigate constant trickles or banging and knocking sounds around your home along with any unusually damp floors or grounds and when you notice an unpleasant smell.

Before installing water drains, there are some factors that you must first consider:

• Check the soil type.
• The soil must have sufficient depth.
• Ensure a lower groundwater table for a more effective infiltration.
• Design the system with regards to its terrain.
• Check local government regulations.
• Ensure that there are no illegal sewer and stormwater drains cross-connections.

Here are a few tips for stormwater drainage installation:

• Use a roof, tarpaulin or an awning to prevent the rain from washing sediments into stormwater.
• You can divert stormwaters from your driveways, roofs, patios or paths towards vegetated areas around your home. This will filter the stormwater before directing them to the drainage system.

The cost of installing a stormwater or sewer drain mainly depends on which state you are located in Australia. The average cost is $75/hour, with the lowest at $70/hr and the highest at $77/hr. For those in Victoria, customers will be charged about $70/hr. Those in New South Wales $75/hr is average, and Queensland is the highest at $77/hr. The costs are due to the materials, size and additional services done during the job.

Above we cover additional costs related to stormwater or sewer drainage.

iseekplant has a nationwide network of quality stormwater drainage companies operating in all Australian capital cities from Brisbane to Sydney, Canberra, Melbourne to Darwin, Perth and Adelaide. We also offer drainage hire solutions in all major towns and cities from Cairns down to Townsville, Sunshine Coast, Gold Coast, Bendigo and Geelong.

iseekplant has a nationwide network of sewage and stormwater contractors for all your sewer and stormwater drainage installations and solutions. Use our get a quote tool to easily request a quote for stormwater drainage and sewer drainage services in your area. You can also give us a call on 1300 691 912 or email us at projects@iseekplant.com.au, and we’ll assist you in finding a stormwater or sewer drainage contractor.

Stormwater drainage is a system designed to collect and manage rainwater runoff from roofs, roads, and paved surfaces, preventing flooding, erosion, and water damage. Proper stormwater management protects buildings, infrastructure, and the environment.

Key components of stormwater drainage

• Gutters and downpipes: Direct roof water into the system
• Drains and channels: Capture surface runoff from paved areas
• Pipes and culverts: Convey water to stormwater mains or natural waterways
• Retention and detention basins: Temporarily store water to control flow and reduce flooding

Effective stormwater drainage reduces property damage, manages water sustainably, and ensures compliance with local regulations.

Several types of drainage systems are used to manage water effectively across residential, commercial, and industrial sites. The choice depends on the water source, site conditions, and intended purpose.

Common drainage system types

• Surface drainage: Channels, grates, and trenches to remove rainwater from paved areas, gardens, or sports fields
• Subsurface (French) drains: Perforated pipes buried underground to divert groundwater away from foundations or landscaped areas
• Stormwater drainage: Piped networks, drains, and retention basins for managing heavy rainfall in urban areas
• Sewer drainage: Networks for wastewater removal from homes, businesses, and industrial sites
• Gutter and downpipe systems: Collect roof water and direct it safely away from buildings

Choosing the right system ensures effective water management, prevents flooding, and protects structures and landscaping.

The depth of stormwater drains depends on site conditions, pipe diameter, and the volume of water they need to convey. Proper depth ensures efficient flow, prevents blockages, and maintains compliance with local regulations.

Typical stormwater drain depths

• Residential drains: Usually 300 mm to 600 mm below the surface for small pipes (100–150 mm diameter)
• Main or high-capacity drains: Can range from 1 m to 2 m or more, depending on pipe size, slope, and catchment area
• Factors affecting depth: Soil type, frost line, traffic loads, and connection to existing infrastructure

Depth must be designed to provide sufficient fall for gravity flow while maintaining structural integrity and accessibility for maintenance.