PHPP Pre-Assessment · UK-wide, Remote We don't just model it.
We build it.
PHPP-informed pre-assessment by Paweł, using PHI methodology. Full certified PHPP models available through our PHI-accredited partner. One of the few UK contractors combining Passive House training with direct European materials supply — available remotely, UK-wide.
Book AssessmentAPMBuild PHPP pre-assessments are carried out by Paweł Okurowski using PHPP methodology (Level 2 Passive House course at AZB, a PHI-accredited training body, 2023). They are not produced by a PHI-certified PHPP Expert or Certified Passive House Designer. Where full certified PHPP modelling is required for building certification, APMBuild works with an accredited PHI partner. Pre-assessments are indicative and intended to guide specification decisions.
The Passive House Planning Package, in brief.
PHPP is the Passive House Institute's energy model: it calculates the heat lost through every element of a building, and the heating demand that results, before anything is built or retrofitted. A pre-assessment uses it to test whether your project can reach EnerPHit or Passive House standard and which U-values it needs to get there, so the house can be detailed to perform close to the prediction.
What is PHPP? Full explanation → · or download the free PHPP Explained guide from our free guides page.
Designed performance, not hoped-for performance
PHPP calculates what your building should use before a single brick is laid, so specification decisions rest on numbers rather than hope.
Avoids expensive mistakes
Retrofitting in the wrong sequence — or specifying materials that can't meet the target — costs far more to correct. PHPP identifies issues on paper, not on site.
Required for certification
EnerPHit and Passive House certification require a certified PHPP model. APMBuild delivers full certified PHPP models through our PHI-accredited partner — pre-assessment work and project coordination carried out directly by Paweł.
Initial pre-assessment
Carried out by Paweł Okurowski directly. A practical first step before committing to any project.
Heat loss overview — indicative U-value targets for your walls, roof, floor and windows.
EnerPHit feasibility — whether your property can achieve EnerPHit standard and at what cost.
EPC improvement pathway — the most cost-effective route to your target EPC band.
Indicative cost range — a realistic sense of project budget before detailed design.
UK-wide remote service. Requires property details, existing drawings if available, and current EPC certificate.
Full certified PHPP model — via our PHI-accredited partner
A complete PHPP model suitable for EnerPHit or Passive House certification submission. Delivered through our PHI-accredited partner, with Paweł coordinating between client, partner and site.
Full energy model — detailed calculation of heating demand, primary energy and peak load.
U-value schedules — specification of every building element to achieve target performance.
Thermal bridge analysis — identification and mitigation of linear thermal bridges.
Certification-ready output — suitable for submission to PHI for EnerPHit or Passive House certification.
Delivered UK-wide through our PHI-accredited partner. Suitable for architects, developers, housing associations and private clients requiring certification. APMBuild handles coordination, pre-assessment input, and the build itself.
Modelling and building
usually sit with different firms.
APMBuild does both.
We're one of the few UK contractors combining Passive House training, a direct European supply chain, and PHPP-informed pre-assessment under one roof — with full certified PHPP modelling delivered via our PHI-accredited partner. The model informs the build, and the build is detailed so the house performs close to the model's prediction.
Book Your AssessmentWhy modelling at design stage matters
We Are Building the Next Retrofit Programme
15.7 million UK homes already fail the overheating criterion used for new build. Why the summer question is cheap at concept stage and expensive after handover.
Building ScienceThe Thermos Syndrome: Why New UK Homes Overheat
Thermal mass, glazing g-values and summer bypass — the three variables a PHPP overheating frequency check actually turns on.
For ArchitectsPHPP Modelling for UK Architects
How PHPP differs from SAP, what a pre-assessment includes, typical costs and how to read the output.
PHPP and Passive House modelling questions
What PHPP is, when you need it, and how APMBuild delivers it.
What is PHPP and what does it tell me?
PHPP (Passive House Planning Package) is the industry-standard energy modelling tool developed by the Passive House Institute. It calculates heating and cooling demand, primary energy use, overheating risk and U-values at a level of detail far beyond SAP, telling you exactly how a building will perform before construction starts.
Do I need a PHPP assessment for my project?
PHPP is essential for any project targeting Passive House or EnerPHit certification, and strongly recommended for any deep retrofit or low-energy new build where heating demand reduction is a goal. APMBuild offers PHPP pre-assessments to confirm whether your project can hit specific targets before you commit to a full design.
Is APMBuild a certified Passive House consultant?
No — APMBuild is not a certified Passive House consultant. Director Paweł Okurowski is Passive House-trained (Level 2 course at AZB Wrocław, a PHI-accredited training body, January 2023), working with PHPP methodology day to day. For projects requiring formal PHI certification, we collaborate with certified Passive House consultants and certifiers as part of the delivery team.
What does a PHPP pre-assessment include?
An APMBuild PHPP pre-assessment includes building geometry input, U-value calculations for the proposed fabric, glazing specification, MVHR sizing, airtightness target, heating demand and overheating risk output, plus a written summary of what's needed to reach EnerPHit or Passive House targets.
How long does PHPP take?
A PHPP pre-assessment with APMBuild typically takes 1–2 weeks from receipt of drawings and site data. Full PHPP modelling supporting certification can run 3–6 weeks depending on complexity and design iterations.