SAP
SAP calculations & BREL reports
Design-stage and as-built support for new homes, conversions and extensions, including Part L/BREL reports in England/Wales and Section 6 in Scotland .
Domestic energy consultants
Our energy consultants help homeowners, architects and developers understand building performance and meet relevant standards. From early stage planning reports and SAP calculations to more complex overheating assessments and thermal bridging analysis, we support your project through design and compliance.
Because early decisions affect performance, we combine technical analysis with practical recommendations. You can then make informed choices and understand the next steps.
What we do
RJ Energy provide Building Regulations assessments and energy modelling for domestic projects. We can also help you compare design options before construction begins.
By assessing your proposals early, we can identify opportunities to improve efficiency and resolve potential issues. For example, modelling can help clearly show how changes to the building fabric affect energy performance allowing you to assess which options are most cost effective.
Tell us what you’re building and what your project needs to demonstrate. We can then recommend suitable services and agree a clear scope of work.
Design-stage and as-built support for new homes, conversions and extensions, including Part L/BREL reports in England/Wales and Section 6 in Scotland .
Assessment of overheating risk using CIBSE TM59 analysis and consideration of mitigation options. Reports for Part O/section 3.28.
Project-specific PSI-value calculations for construction junctions, supporting fabric decisions and SAP inputs.
Calculations to determine expected daily water use from proposed fittings to achieve a maximum use of 125 litres per person per day in line with Approved Document Part G.
Energy statements and carbon reporting shaped around planning policy and local authority targets. Reports are bespoke for each project.
PHPP energy modelling support for Passivhaus and low energy projects, helping design teams assess the energy balance and coordinate design decisions.
Who we support
For more information about assessment standards, see England’s Approved Documents and Scottish building standards guidance.
We explain assessment requirements early, so you can use the findings to inform drawings and specifications.
Whether you are building a single plot or a multi-unit scheme, we help coordinate the energy reporting your development needs.
If the specification changes during construction, we help you understand the effect on assessments and the evidence needed for reporting.
We explain which reports your new home, extension or conversion needs. You can then plan the assessments with greater confidence.
How it works
Our energy consultants explain the assessment process and the information we need. As a result, you know what to provide and which reports to expect.
First, share your drawings, location and project type. Include any planning or building control requirements, so we can understand the assessment scope.
Next, we confirm the required work and provide a detailed fee proposal. Once work begins, we clarify any remaining information gaps.
We then undertake the modelling and prepare your reports. Finally, we explain the next steps and any further information required.
Send your project details to our energy consultants. We can then help you identify the assessments you need and a sensible starting point.
Because building regulations and planning requirements vary between England, Wales and Scotland, we confirm the relevant route for your project.