Your Drainage Partner
From Design to Maintenance
Grantham Group
Drainage Services
Grantham Drainage designs and implements specialist drainage solutions across residential large-scale commercial, industrial, and civil infrastructure projects.
With over 30 years of experience we integrate Grantham Hydro and Plumbing services with our civil construction expertise, environmental insight, and technical know-how to design, install, and maintain drainage systems that are safe, efficient, and compliant.
Our work covers stormwater management, wastewater, trade waste, retention systems, and site-wide infrastructure, ensuring every project is executed with precision and reliability.
What Sets Grantham Drainage Apart
Grantham Drainage delivers the essential underground systems that keep developments safe, resilient, and ready to build on.
From large-scale civil infrastructure to residential subdivisions and commercial projects, our team manages the critical early-stage works that define the success of everything above ground.
With deep technical knowledge, specialist machinery, and decades of practical experience, we handle complex excavations, major service connections, environmental water management, and long-run drainage infrastructure with precision and efficiency. Whether we’re installing deep sewer lines, building stormwater networks, or solving difficult ground conditions, we bring the capability, the gear, and the hands-on expertise to get it done right.
As part of the wider Grantham Group, our drainage specialists work seamlessly alongside Plumbing and Hydro services delivering coordinated, end-to-end solutions that reduce delays, improve communication, and ensure certainty at every stage of the build.
Groundworks & Civil Integration
Drainage sits at the core of any successful build. From early earthworks to final reinstatement, our team provides compliant, future-proofed systems that support structures above and protect land below.
What we do:
New stormwater and wastewater installations
Deep trenching, backfilling, and compaction to engineering spec
Manhole installation, rehabilitation, and pipe infrastructure
Retention and detention tank installation
Digger and specialist plant operation
Environmental & Water Management Solutions
Our team designs systems that reduce flooding, prevent contamination, manage runoff, and meet the evolving environmental expectations of councils and communities.
What we do:
Flooding solutions and surface water management
Trade waste, grease traps, and interceptors
Sustainable stormwater design
Hydro excavation for sensitive or high-risk sites
Collaboration with environmental engineers
Effective drainage safeguards the environment and ensures developments meet stringent compliance, sustainability, and safety requirements.
Maintenance & Repairs
Keeping systems operational with CCTV diagnostics and jetting
How we can help:
Drainage repairs and defective pipe replacement
Unblocking and clearing
Hydro jetting through Grantham Hydro
CCTV diagnostics and reporting
Reinstatement and ongoing upkeep
Residential Homes • Apartment Buildings • Commercial buildings & retail • Medical centres • Schools & community facilities • Industrial sites & processing plants • Food outlets • commercial kitchens
We’ve got you covered.
Specialist civil and drainage expertise
Integrated services with Plumbing and Hydro for end-to-end solutions
Strong environmental and compliance focus
Hands-on teams with experience managing projects of any scale
Whether you’re planning a new build or large-scale commercial project, our specialist team is ready to help.
At Grantham Group, we believe great infrastructure goes hand-in-hand with environmental responsibility. We integrate sustainable practices across our projects, from material selection to energy- and water-efficient systems, ensuring our work supports both client goals and a healthier environment.
Our approach reflects our commitment to positive impact, balancing innovation, efficiency, and long-term performance with care for the communities and spaces where we work.
