Our services

We offer a complete range of septic tank services, including:

• Septic tank installation – tailored solutions for new and replacement tanks.
• Routine emptying and de-sludging – keeping systems operating smoothly and preventing blockages.
• Cleaning and inspections – professional checks to ensure compliance and long-lasting performance.
• Maintenance and repairs – addressing issues quickly to avoid overflows or system failures.

All work is carried out by skilled engineers using modern equipment, ensuring reliability and long-term performance.

Installation process

Our septic tank installation process is carefully planned from start to finish:

• Site assessment and design – evaluating soil, property, and wastewater requirements to determine the correct tank type and size.
• Layout planning – designing the tank, drainage field, and pipework to meet all local and environmental regulations.
• Excavation and installation – preparing the site, installing the tank, connecting drainage, and testing the system.
• Handover and guidance – ensuring the system is fully operational and providing advice for ongoing care.

Who we work with

Our septic tank services are trusted by:

• Domestic homeowners and rural properties
• Commercial sites and businesses

Learn more about the sectors we serve [link to dedicated sectors page].

Why choose Shanahan Contracting Ltd

• Experienced, local engineers with hands-on expertise
• Fully licensed, insured, and compliant with environmental regulations
• Complete, end-to-end service for installation, maintenance, and emptying
• Reliable solutions tailored to your property or business

Need a septic tank installed or serviced? Contact Shanahan Contracting Ltd today to discuss your requirements or request a site visit.

Request a quote for Septic tank installation & servicing

• I just wanted to drop you a message to thank you for your work. Your determination to sort out someone else’s mistake was outstanding. Your commitment and tenacity are a real credit to Shanahans, and I really look forward to working with you in the future.

  Matt -  Regional Maintenance Manager 

• Just a quick thank you for your help in sorting our drainage issue and for the outstanding service provided by Michael yesterday, he is a real credit to your business.

  Andrew Standalone Farm - Letchworth

• “Shanahan’s has looked after our domestic property for years now. We have always had excellent ,friendly service. An unexpected onsite problem which occurred during their last visit was investigated, reported on and resolved promptly. I know I can rely on their expertise. I would not hesitate to recommend this company to others.

  Caroline - Radlett