Net Zero Building Consultancy
Energy Statements, Whole Life Carbon, EPC's, SAPs, SBEMS, Daylight and Thermal Comfort, Air Testing and BREEAM. Coordinated Solution Driven Thinking.
Energy and Sustainability Consultants
Building Performance Specialists guiding you towards robust, compliant and cost effective energy and suatainabilty solutions
We're here to support you at all stages of development from planning, through construction and into post occupancy..
Give us a call or 'get in touch' to see how we can help.
Energy Statements
Energy & Sustainability Statements are now a standard requirement at planning stage, particularly for new builds, major refurbishments, and change-of-use projects. Increasingly, local authorities demand clear evidence that a proposed development will meet specific energy and sustainability standards to meet their ambitious climate targets.
A good Energy Statement has considered and coordinated all the relevant Energy and Sustainability targets set by the planning Authority and your specific project requirements.
We'll listen to your aspirations and aims to make sure your targets are achieved without overcomitting you to conditions.
Building Compliance Part L Vol. 1 - SAP
SAP (Standard Assessment Procedure) calculations are a legal requirement for all new residential buildings and most extensions in the UK. These assessments check your building’s energy efficiency against the standards set out in Part L of the Building Regulations. Without them, you cannot start work or complete your project, and you will not receive an Energy Performance Certificate (EPC), which is needed to sell or let your property.
All projects require 'Design Stage' SAP calculayions and 'As Built' SAP Calculations. We can help at all stages.
Building Compliance Part L Vol. 2 - SBEM
SBEM (Simplified Building Energy Model) calculations are a legal requirement for all new commercial buildings, and for many extensions or conversions, across the UK.
These calculations show whether a building meets the energy efficiency standards set by Building Regulations Part L. The process uses data from your plans and specifications to predict energy use, carbon emissions, and compliance.
Early engagement with SBEM allows you to make informed decisions about materials, insulation, heating, lighting, and ventilation—so you can avoid common pitfalls and extra costs later on.
BREEAM
BREEAM (Building Research Establishment Environmental Assessment Method) is the internationally recognised standard for measuring, improving, and certifying the sustainability performance of buildings and projects. Developed by BRE in the UK, BREEAM provides a practical framework for evaluating and enhancing a building’s energy efficiency, environmental impact, and occupant wellbeing.
BREEAM have certification routes for new build, refurbishment and fit out and existing buildings in use. We can support with any of these projects and we also provide BREEAM AP (Advisory Professional) support.
Whole Life Carbon Assesment
A Whole Life Carbon Assessment (WLCA) is a method of measuring the total carbon emissions of a building across its entire life cycle. Rather than looking only at operational energy use, WLCA includes every stage of a development: the extraction of raw materials, the manufacturing and transport of products, the construction process, day-to-day operation, ongoing maintenance, and finally end-of-life demolition, disposal, or recycling.
Engaging with whole life carbon assessment at the earliest design stage makes it easier to identify carbon hotspots, explore cost-effective alternatives, and future-proof your development. It also strengthens your sustainability credentials, helping your project meet both regulatory requirements and market expectations.
Embodied Carbon
Embodied carbon is the greenhouse gas emissions linked to the full lifecycle of building materials and construction, excluding operational energy use. It covers emissions from extracting raw materials such as steel, concrete, and timber, the manufacturing process for bricks and insulation, transporting materials to site, the emissions produced during construction, and the impact of demolition or recycling at the end of a building’s life.
Unlike the energy used to run a building, these emissions are largely invisible but can account for up to 40% or more of a project’s total carbon footprint, especially in modern construction.
With regulations tightening and sustainability targets rising, reducing embodied carbon is quickly becoming a critical factor for anyone involved in the built environment.
Thermal Modelling
Dynamic Simulation and Thermal Modelling are powerful tools that predict how your building will perform, both during design and after construction. Using your building’s plans and specifications, we create a detailed 3D model and run a full year of simulations, taking account of local weather, solar gain, and actual building orientation. These simulations are performed room by room, which allows us to analyse thermal comfort, overheating risk, energy use, and overall building performance in fine detail.
Thermal modelling is now a requirement for many projects in the UK. It supports compliance with Approved Document Part O, TM52, TM59, TM54, and BB101 for schools, among others. It is essential for getting accurate Part L (BRUKL) reports, Energy Performance Certificates (EPCs), and for proving energy and sustainability credentials for planning or BREEAM. By providing evidence before and after construction, thermal modelling protects you against costly redesigns, delays, and compliance issues.
Overheating (Part O)
Part O of the Building Regulations in England sets out clear rules to limit overheating in new residential buildings. This regulation is about keeping indoor temperatures safe and comfortable for occupants, especially in summer, while reducing the need for energy-hungry cooling systems. Overheating calculations are a requirement for compliance. They show that your building design addresses the risks early and meets the standards needed for approval.
f you are planning a new residential building in England, whether you are a housebuilder, architect, developer, or self-builder, then Part O applies to you
Getting these calculations done early can help you avoid project delays, costly design changes, and compliance risks.
Daylight & Sunlight Assessments
Daylight Calculations provide an objective way to assess how much natural light will be available within a building, as well as how efficiently that daylight is used. These calculations are used for a wide range of purposes—demonstrating compliance for planning, achieving BREEAM credits, meeting sector-specific requirements, and improving the design and wellbeing of building occupants. Daylight assessments can also identify the risk of glare, supporting both comfort and performance.
Many planning authorities require Daylight Calculations for projects in sensitive settings, especially in sectors such as healthcare, education, and residential development. They are a key element of the BREEAM Visual Comfort Assessment (HEA 01) and may also be requested for building design optimisation or to support applications where daylight is a material consideration.
CIBSE TM54
Operational Energy
TM54 supports a seamless planning approvals process and can be used as a design verification tool.
For carbon reduction – Importantly, analysis also supports carbon reduction by evaluating operational energy performance of all areas of a development, allowing realistic targets to be set.
For developers setting high internal standards for ESG, analysis can be a benchmarking tool for energy consumption and energy performance.
For the London Plan – Analysis is required of all developments across the Greater London Authority (GLA), as part of the Be Seen stage of the London Plan energy hierarchy. The analysis contributes to a development’s associated Energy Strategy and Whole Lifecycle Carbon Assessment.
For BREEAM – Analysis will contribute to four credits under BREEAM New Construction, providing analysis is completed at Design Stag
Psi Value Calculations
SI values (or Ψ-values) measure how much heat passes through the junctions and connections of a building, such as where walls meet floors or roofs
In the UK, PSI values are required for SAP (Standard Assessment Procedure) calculations in residential projects,
Early focus on PSI values can ensure that you achieve an optimum SAP rating and may yield savings in other aspects of your building specification.
Water Efficiency Calculations (Part G)
All new homes must meet strict water usage requirements under Part G of the Building Regulations. These rules limit water consumption to no more than 125 litres per person, per day, with some local planning authorities requiring a stricter target of 110 litres, particularly in water-stressed areas.
To gain Building Control approval, every new dwelling must submit a water efficiency calculation report.
If full product specifications are not yet chosen, we can provide a compliant schedule of fixtures to meet the legislative requirements. For developers, contractors and architects, this makes the process straightforward and reduces risk.
Air Tightness Testing
Air tightness testing, sometimes called air permeability, air leakage, or air pressure testing, is a critical check required for all new buildings and many refurbishments under Part L of the Building Regulations in England and Wales.
This test measures the amount of air that escapes through gaps, cracks, and unintended openings in the building envelope, providing a direct indication of how well your property retains heat and reduces energy loss.
A successful air tightness test is now a standard requirement for most dwellings, and the result feeds directly into your SAP (Standard Assessment Procedure) calculation and Energy Performance Certificate (EPC). Engaging early with a qualified provider ensures you are not caught out by last-minute problems, and can often identify opportunities to improve efficiency well before construction is finished.
Environmental Product Declaration (EPD)
An Environmental Product Declaration (EPD) is a standardised, third-party verified report that sets out the environmental impact of a construction product through every stage of its lifecycle. EPDs are based on Life Cycle Assessment (LCA) methods and follow strict requirements under ISO 14025 and EN 15804. They present reliable, transparent data on key factors such as embodied carbon, energy use, waste, emissions, and resource consumption.
With increasing focus on carbon reporting and responsible sourcing, an EPD helps your business stand out, satisfy client expectations, and prepare for future legislation. Choosing to invest in EPDs not only manages compliance risk, but can also lead to better project outcomes, higher marketability, and improved trust among clients and stakeholders.
Carbon Neutral Certification
Carbon Offsetting
Looking to certify your project as Carbon Neutral? All projects have a certian level of unavoidable emissions. Thats why we offer offseting and Carbon Neutral Certification.
We are the leading offsetting scheme in the UK constructino industry, a part of the 'Voluntary' Market. Carbon Units
After your 'as built' embodied carbon or whole life cycle assessment has been reported, you're unavoidable carbon emissions are reported.
Carbon Offsetting is a way of buying carbon units from verified carbon reduction projects around the world. We hold a blended portfolio of units which is designed to support verified carbon reduction projects from one of the 4 leading verification standards. THis blended portfolio is designed to provide cost certainty in a changing market.
Alternatively, we can help you source carbon units from specific projects that align with your ESG requirements. Our blended portfolio starts at £10 per unit and bespoke offsets range from between £15 and £500 per unit.
Our clients
How Can we help you with your project?
We want to know your needs exactly so that we can provide the perfect solution. Let us know what you want and we’ll do our best to help.