2026 Passivhaus Retrofit Masterclass

A six-part, expert-led online masterclass covering Passivhaus retrofit at scale, from residential component methods to complex estate-wide projects. Sessions address cost, payback and innovative funding, retrofit tools in use, and real-world insights from schools and major institutions including King’s College London, with advanced case studies across multiple building types.

Advanced level

Advanced level

12

PHI credit points

9

Hours long

£

Paid course

Buy course

Watch a shortened version of the introductory session for free above. Members can watch the full intro for free below. You must register or log in to access these.

Course Content

Scaling up Passivhaus Retrofit  1.5hr 4 Topics | 1 Quiz Buy to unlock

FREE FOR MEMBERS. Explore how to Scale up Passivhaus Retrofit short course and the new PHT publications. Learn how an EnerPHit-informed retrofit plan (EIPR) can maximise project benefits, prioritise measures, and optimise retrofit sequencing.

First delivered on: 28 January 2026
Speakers
  • Sarah Lewis
  • Sarah Price
  • Laszlo Lepp
Learning outcomes

1. Awareness of the two new PHT publications covering retrofit and how their content can benefit your projects.
2. Identify the ways in which an EnerPHit-informed retrofit plan (EIPR) can benefit every retrofit project.
3. Recognise the importance of the sequencing of retrofit measures and how an EnerPHit-informed retrofit plan (EIPR) can help you prioritise.

View Lesson
Component method for residential Passivhaus retrofit  1.5hr 4 Topics | 1 Quiz Buy to unlock

Join us for a deep-dive Masterclass exploring an EnerPHit by Components project currently under construction. With few UK examples of this pathway, the session offers a rare opportunity to examine the method in practice—from design intent through to on-site delivery and certification. We’ll look closely at the Sea View project’s technical development, including floor upgrades, envelope strategy, THERM calculations, PHPP progress, and the practical challenges of implementing the Component method on a first Passive House Designer project. The certifier will also share insights drawn from wider retrofit experience, placing the project within the broader context of EnerPHit practice.

First delivered on: 18 February 2026
Speakers
  • Sarah Lewis
  • Gabriel Hyde
  • Paul Smith
Learning outcomes
  • Awareness of the process and how decisions are made within an EnerPHit informed retrofit.  
  • Identify the certification targets of the component method and how these are applied within an EnerPHit certification. 
  • Recognise possible exemptions that that can apply to EnerPHit certification and when these may be applied.  
View Lesson
Cost, payback & innovative funding methods 4 Topics | 1 Quiz Buy to unlock

Whether you’re at concept stage or heading to tender, the cost conversation is never far away. We’ll tackle the numbers behind high-performance retrofit – and the models that can make Passivhaus retrofit investable at scale.

First delivered on: 18 March 2026
Speakers

Sarah Lewis
Loreana Padron
Dr Zachary Gill

Learning outcomes
  1. Recognise the benefits of a EnerPHit retrofit of a social housing project case study.
  2. Understand how the choice of retrofit process and/or certification impacts on project cost and performance gap.
  3. Have an awareness of how adding ‘social value’ to your project might support the buisiness case for EnerPHit retrofit.
View Lesson
Estate-wide Passivhaus retrofit tools in use  1.5hr 4 Topics | 1 Quiz Buy to unlock

This webinar demonstrates how estate-wide toolkits enable scalable decarbonisation across large portfolios. Participants will learn the practical application of structured tools through a real-life case study and receive guidance on implementing these frameworks within their own projects.

First delivered on: 15 April 2026
Speakers
  • Sarah Lewis
  • Seb Laan Lomas
  • Ann-Marie Fallon
Learning outcomes
  1. Have an awareness of the estate wide retrofit tool that Archetype have developed for Local Authorities and how it benefits an estate retrofit programme.  
  2. Identify the key retrofit priorities that led to the retrofit methodology of Liberton Nursery.  
  3. Recognise the challenges and cost implications of decanting users during a deep retrofit project.  
View Lesson
EnerPHit School Insights  1.5hr 4 Topics | 1 Quiz Buy to unlock

This webinar will explore how EnerPHit and Passivhaus methodologies can be used as practical delivery frameworks for achieving net zero performance in existing school buildings, using the retrofit and extension of a Victorian primary school in Scotland as a detailed case study. Covering everything from procurement and funding to early-stage modelling and heritage constraints through to fabric upgrades, building services, contractor collaboration and lessons learned on site, the session will examine how performance assurance, operational energy reduction and embodied carbon considerations can be successfully balanced within a public-sector education project.

First delivered on: 20 May 2026
Speakers
  • Sarah Lewis
  • Elaine Keenan
  • Barbara Lantschner
View Lesson
King’s College London: Delivering component method for complex retrofit  1.5hr 6 Topics | 1 Quiz Buy to unlock

The final session in the 2026 Passivhaus Masterclass series takes you inside one of London’s most ambitious heritage retrofit projects: the transformation of Bush House at King’s College London into a high-performance, future-ready academic hub using the EnerPHit Component Method.

First delivered on: 17 June 2026
Learning outcomes
  1. Have an awareness of the key considerations within a heritage retrofit project.  
  2. Be able to recognise ways that services can be design and operated to maximise energy efficiency.  
  3. Understand how specification choices need careful consideration a heritage retrofit project. 
View Lesson

Learning Outcomes

Scaling up Passivhaus

  1. Awareness of the two new PHT publications covering retrofit and how their content can benefit your projects.  
  1. Identify the ways in which an EnerPHit-informed retrofit plan (EIPR) can benefit every retrofit project.  
  1. Recognise the importance of the sequencing of retrofit measures and how an EnerPHit-informed retrofit plan (EIPR) can help you prioritise.  

Component Method for Residential Passivhaus Retrofit

  1. Awareness of the process and how decisions are made within an EnerPHit informed retrofit.  
  1. Identify the certification targets of the component method and how these are applied within an EnerPHit certification. 
  1. Recognise possible exemptions that that can apply to EnerPHit certification and when these may be applied.  

Cost, payback & innovative funding models

  1. Recognise the benefits of a EnerPHit retrofit of a social housing project case study.  
  1. Understand how the choice of retrofit process and/or certification impacts on project cost and performance gap.   
  1. Have an awareness of how adding ‘social value’ to your project might support the buisiness case for EnerPHit retrofit.  

Estate-wide Passivhaus retrofit tools in use

  1. Have an awareness of the estate wide retrofit tool that Archetype have developed for Local Authorities and how it benefits an estate retrofit programme.  
  1. Identify the key retrofit priorities that led to the retrofit methodology of Liberton Nursery.  
  1. Recognise the challenges and cost implications of decanting users during a deep retrofit project.  

EnerPHit School Insights

  1. Awareness of some design challenges and solutions when working with a retrofit of a derelict listed building  
  1. Identify how an EnerPHit retrofit can help you achieve LEIP targets.  
  1. Understand how choice of materials within a retrofit project impact on embodied carbon.  

King’s College London: Delivering component method for complex retrofit

  1. Have an awareness of the key considerations within a heritage retrofit project.  
  1. Be able to recognise ways that services can be design and operated to maximise energy efficiency.  
  1. Understand how specification choices need careful consideration a heritage retrofit project. 

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Cost, payback & innovative funding models

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On-demand Pricing

Full series recordingsIndividual lecture recordings
Full intro free for members
Member price£112+VAT£28+VAT
Non-member price£200+VAT£40+VAT

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What other learners say

  • Engaging and informative. Retrofit is challenging both technically and in how it’s communicated, and this session covered both aspects.
    Gessica Salerno
    Marrons
  • I always leave inspired, refreshed and thinking carefully about how I can bring new knowledge to bear on my current practice.
  • EnerPHit-informed Retrofit Plan should be used for all retrofit projects.
    Carola Drager RIBA