Water Calculation Certificates

Accurate reports to meet Part G water efficiency requirements for new homes and conversions.

Certified Water Reports

Stay compliant with building regulations for water usage

Our detailed water calculation reports are accepted by Building Control and are essential for planning applications, new builds, and conversions. We assess the water consumption of all fittings and fixtures and provide a certified report to support your project’s compliance.

Helping new builds and conversions meet water efficiency regulations

CEC Energy provides accurate, compliant water efficiency calculations for domestic properties across London. Whether you’re building from scratch or converting an existing space, our water usage assessments help you meet Part G of Building Regulations quickly and with confidence.

Approved SAP Assessor Reports

Learn More

Our water calculations are carried out by qualified professionals using industry-standard methodology. We calculate daily water usage per person based on proposed sanitary ware and deliver clear, reliable documentation that satisfies planning conditions.

Ideal for New Builds & Conversions

Learn More

Whether it’s a new housing development, a flat conversion, or a loft extension, our reports are tailored to your exact project requirements. We work closely with developers, architects, and building control officers to ensure fast, accurate service.

Fast Turnaround, No Hassle

Learn More

We understand tight project timelines. That’s why we offer same-day or next-day turnaround on most reports, with digital delivery and straightforward communication throughout. Need advice on what’s required? Our team is here to help.

Supporting Your Project from Start to Sign-off

From initial consultation to submission-ready reports, CEC Energy supports every step of your compliance journey. We ensure that your water calculation certificate is accurate, accepted, and aligned with your wider building compliance needs.

Get Started

Let's talk about your project.

Have a question, need a quote, or ready to book a service? Fill out the form and our team will get back to you promptly. We’re here to make compliance easy, efficient, and stress-free.