Rooted in Excellence. Grown Through Trust.

AA Drainage specialises in delivering high-quality septic tank installations, sewage treatment plants, and comprehensive drainage solutions across West Sussex. With over 50 years of experience and a reputation for reliability, we've served more than 5,000 customers.

From rural properties needing off-mains drainage to housing developments requiring complete surface water management, our expert team brings precision, professionalism, and pride to every project.

We deliver expert services in septic tank installation, sewage treatment plant commissioning, land drainage, soakaway construction, and percolation testing — all fully compliant with Environment Agency regulations and Building Standards.

Every project begins with a free, no-obligation consultation where we assess your requirements and provide honest advice on the best solution for your property and budget.