About Us

Welcome to Green Thames

Building Smarter, Greener, and Compliant Futures

At Green Thames Consultants Limited, we specialise in providing expert consultancy for sustainable building design, energy efficiency, and regulatory compliance.
Our mission is simple — to help developers, architects, and homeowners build better: compliant, efficient, and environmentally responsible spaces.

Our Mission.

To deliver smart, sustainable, and compliant building solutions through technical excellence, innovation, and integrity — helping clients design and construct energy-efficient environments that perform for people and the planet.

Our Vision.

To be a trusted leader in sustainable building consultancy, driving the transition towards low-carbon, high-performance developments that shape a greener and more resilient future.

Since 1996

A Memorable Start

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2000 - 2008

Milestone Development

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2009 - 2012

Consulting Award

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2013 - 2016

Scale Expansion

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Who We Are

We are a team of experienced building services and sustainability consultants with a passion for creating energy-efficient and high-performing buildings.

With extensive knowledge of Building Regulations, CIBSE guidelines, and planning requirements, we bridge the gap between design and compliance — delivering clear, reliable advice from concept to completion.

What We Do

From SAP and SBEM calculations to TM59 overheating, daylight & sunlight assessments, and Part L compliance, we provide a full suite of energy and environmental services for both residential and commercial projects.
Every report, model, and recommendation is driven by accuracy, clarity, and a commitment to sustainable outcomes.

Discovery More

SAP Calculations

Energy performance assessments to ensure homes meet Building Regulations Part L.

New Build SAP Calculations

Compliance reports for new dwellings to demonstrate energy efficiency from design stage to completion.

Conversion SAP Calculations

Energy assessments for converted buildings to verify compliance and performance standards.

Extension SAP Calculations

Part L energy checks for home extensions to meet required efficiency targets.

TM59 Residential

Thermal modelling to assess and limit overheating in new residential developments.

TM52 Residential

Comfort analysis for naturally ventilated homes, identifying and reducing overheating risks.

Customer
Satisfaction

Years Proven
Track Record

Projects We
Have Completed

Honorary
consulting award

Green Thames Consultants

Why Clients Choose Us

Start Your Project

Get a Quote

End-to-end compliance and sustainability support.

Fast, accurate, and transparent reporting.

Expert advice tailored to your project goals.

Proven experience across residential, commercial, and public sectors.

Commitment to quality, innovation, and environmental responsibility.

The Family Herrington

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Testimonials

What Our Customers Say?

More than 99% customer satisfaction is our success.

“Green Thames Consultants delivered our SAP and TM59 reports quickly and with absolute clarity. Their guidance helped us avoid costly redesigns and achieve full compliance on the first submission.”

Sarah Bennett

Director, Bennett + Cole Architects

“The team provided exceptional support throughout the design stage. Their MEP and energy advice was practical, detailed, and perfectly aligned with our architectural intent.”

Michael Turner

Project Manager, Oakridge Developments

“We rely on Green Thames for all our compliance assessments. Their communication is excellent, turnaround times are fast, and their recommendations are always spot-on.”

David Liyanage

Operations Lead, Horizon Construction Group

“A very professional service from start to finish. The daylight and sunlight assessment they produced was thorough and helped secure planning approval without any issues.”