Helping your designs stay cool, compliant and energy-efficient
With UK summers getting hotter, overheating assessments are a vital part of any new build project. They’re not just about designing cooler, more comfortable homes – they’re also a legal requirement under Part O of the Building Regulations.
At Total Energy Assessors, we make new build compliance simple. Whether you’re an architect, developer or contractor in Sheffield, we’ll work with you to assess your designs and highlight any risk of overheating early on. The result? Homes that remain cool, compliant and energy efficient even on the hottest days.
Our Elmhurst-accredited experts take the heat out of compliance. Using the CIBSE TM59 methodology, we’ll analyse your design’s glazing, shading, ventilation and orientation to provide a detailed assessment of how it will perform in warmer weather.
But we do more than provide a tick-box service. If we identify any issues, we’ll recommend smart, practical tweaks that keep your project on track and help you avoid costly mechanical cooling. Whether you’re designing a single plot or large-scale development, Total Energy Assessors is your go-to team for achieving Part O compliance in Sheffield.
With over a decade of combined experience, you’re in safe hands with us. We’ll work closely with you to provide personalised, practical advice that fits your project's needs. From minor tweaks to bigger changes, we’ll be on hand to analyse, advise and recommend solutions.
Clear, fast reporting
Tight deadlines and shifting timelines are part of the job – which is why we prioritise speed and clarity. You’ll receive detailed overheating assessments with straightforward recommendations, fast turnaround times and zero jargon, so you can keep building with complete peace of mind.
Future-ready homes
With rising temperatures and tighter regulations, our assessments help you design buildings that stay cool without relying on energy-hungry aircon. That means lower running costs, improved energy efficiency and homes that meet today’s standards – and tomorrow’s expectations.
How we help you
From getting your quote to completing the assessment, we guide you through every step. Here's how we make it easy:
1
Instant Quote
Select your service, add your details, and get a quote in seconds.
2
Pay online
Pay securely online or by phone. Our team is here if you need support.
3
We do the rest
We’ll schedule your visit and complete the job quickly and efficiently.
Get answers to some of our most commonly asked questions.
What is the CIBSE TM59 methodology?
CIBE TM59 is a recognised method for assessing overheating risk in homes. It uses dynamic thermal modelling to simulate internal temperatures and determine whether a property is likely to become uncomfortably hot during the summer season.
When should I arrange an overheating assessment?
Ideally, as early as possible in your design process. An early assessment will allow for more flexibility in making adjustments that don’t affect your timeline or budget – and can help avoid costly retrofits later down the line.
How long does the assessment take?
This can vary on a few different things – such as the size and complexity of your project. However, we always aim to deliver clear, complaint reports quickly to keep your project moving without delays.
Is a site visit required?
Not always – most new builds only require a simplified overheating assessment that can be performed without a site visit, using architectural drawings and specifications. However, in some cases where the simplified assessment fails or is deemed unsuitable, a more detailed Dynamic Thermal Model (DTM) assessment may be required. These usually involve a site visit.
Where do you serve?
Based in the heart of Sheffield, we work with clients across the city. Whether you’re a builder in Broomhill, an architect in Attercliffe or a developer in Gleadless, get in touch with us today to arrange your overheating assessment.
