London’s Trusted Build-Over Agreement Specialists
Planning to build over a public sewer?
Our expert build-to-agreement services handle drawings, applications, and Thames Water approval to keep your project compliant and delay-free. At Plansing, we help homeowners and developers across London secure approvals quickly with expert-led build-to-agreement services. With 10+ years of experience and 50,000+ completed projects, we know exactly how to get it approved without the back and forth.
What is a Build Over Agreement?
A build-over agreement is an official permission from the local water authority (such as Thames Water) allowing you to build over or near a public sewer. If your project affects existing drainage, you must apply for a build-over agreement before starting construction. This is a legal requirement across London and the surrounding boroughs. At Plansing, we manage the entire build-to-suit agreement application process, ensuring full compliance with Thames Water regulations. Whether it’s a new build or a retrospective build over an agreement, we make sure your project avoids damage risks, delays, and costly issues in the future.
Ready to Get Started?
Don't risk delays, rejection, or costly mistakes. With Plansing, you get expert support, accurate drawings, and a smooth approval process from start to finish.
Why Choose Us
Complete Build Over Agreement Support You Can Trust
Expert Structural & Compliance Guidance
We are a trusted build-over-agreement specialist in London, providing expert structural and drainage compliance support to ensure your project meets all water authority requirements.
Professional Assessment & Honest Advice
We offer clear, practical advice customised to your property and project type, helping you understand risks, requirements, and approval steps before construction begins.
Stress-Free Approval Process
From drainage checks to technical drawings and full application support, we manage the entire build-over agreement process so you can move forward without delays or confusion.
Protect Your Property & Ensure Full Compliance
Our detailed inspections and engineered solutions safeguard your property structure while ensuring full compliance with regulations, helping you avoid disputes and approval issues.