Technically rigorous
Assessment grounded in the applicable methodology, project information and a clear record of assumptions.
Independent technical consultancy · England
Building compliance,
properly resolved.
Energy assessment and Building Regulations advice that moves your project forward. Clear answers, from the first drawing to the finished home.
Based in Lincolnshire. Working throughout England.
BETTER BUILDINGS. BY DESIGN.FIG. 01
Illustrating our approach · not a measured assessment
A technical consultancy
More than a calculation.
Useful design information.
We look beyond the pass or fail. The aim is to identify risk early, explain what is driving the result and help the project team make proportionate, buildable decisions.
Design-aware
The calculation is considered alongside drawings, specification, form and architectural intent.
Commercially useful
Where change is needed, options are considered in terms of buildability and cost—not performance in isolation.
Collaborative
Clear, professional coordination with your own designer, contractor and project team.
Independent credibility
Accredited. Audited.
Accountable.
Tenon’s design-led advice remains the proposition. Elmhurst Energy accreditation provides independent assurance behind it.
- Trained and qualifiedCompetence supported by a government-approved accreditation scheme.
- Appropriately insuredProfessional assurance for accredited assessment work.
- Current and compliantAssessment undertaken within current regulations, standards and scheme requirements.
- Regularly auditedOngoing quality monitoring supports consistent, accountable work.
Our expertise
Domestic energy and Building Regulations assessment
01
SAP calculations
Design-stage and as-built assessment, with practical input where the specification needs to change.
02New-build EPCs
The appropriate certificate for a completed new dwelling, produced from the final SAP assessment.
03Part O overheating
Overheating risk considered while orientation, glazing, shading and openings can still be coordinated.
04Part F ventilation
Ventilation strategy coordinated with layouts, airtightness, services and the wider energy design.
05Part G water efficiency
Whole-dwelling water-use calculations with practical review of proposed fittings and flow rates.
06U-values & fabric optimisation
Project-specific calculations for walls, roofs and floors, with practical advice to optimise insulation build-ups and whole-dwelling fabric performance.
07Area-weighted U-values
A project-specific assessment where glazing and element performance need to be considered together.
08Thermal bridging
Junction strategy reviewed as part of fabric performance, SAP and buildable construction detailing.
09Part L consultancy
Joined-up advice when several requirements interact or a design needs a cost-conscious route to compliance.
Architectural detail · illustrative imageryWorking alongside your team
Technical support without competing for the design commission.
For architects, architectural designers and technicians, Tenon Energy Assessment operates as an extension of the technical team. Send the drawing package; we will assess, identify gaps and coordinate the required outputs while you retain the client relationship.
New-dwelling assessment
Designed in.
Proved as built.
SAP is a process, not simply a certificate at the end. Early assessment creates room to resolve performance before specifications and construction are fixed.
- 01
Design
Establish the dwelling, fabric and services strategy.
- 02
Assess
Model the proposed design against the applicable Part L requirements.
- 03
Optimise
Resolve shortfalls with proportionate, buildable changes.
- 04
Construct
Record products, substitutions, tests and completion evidence.
- 05
As-built assessment
Reconcile the completed dwelling with the final specification and evidence.
- 06
EPC
Produce and lodge the new-build/on-construction EPC from the final SAP assessment.
This service is for SAP-based new-dwelling assessment and new-build/on-construction EPCs—not existing-home DEA surveys.
Knowledge
Useful guidance for
better-coordinated projects.
What information is needed for a SAP calculation?
A practical drawing and specification checklist for design-stage and as-built assessments.
Read articleWhen does an extension need an area-weighted U-value calculation?
When the method may help, what it compares and why it is not a universal glazing workaround.
Read articleSAP calculation vs EPC: what is the difference?
How the design assessment, as-built calculation and new-dwelling certificate relate.
Read articleStart a conversation
A clear next step for your project.
Choose the services you know you need, or select ‘Not sure’. Upload the drawings and we will identify the likely assessment scope.
Get a quote