Paul Coates

The increasing presence of AI in architectural practice is renegotiating who, or what, holds creative authority over a project. This paper introduces a novel two-construct framework, AI Logic (AL) and Architectural Value (AV), to operationalise this shift. AL captures a tool's computational reasoning across automation, optimisation, and predictive capability, while AV captures design agency support, contextual sensitivity, and exploratory capacity. Positioning fifty AI-driven tools within this AL-AV construct via tension map analysis identifies stage-specific patterns within the selected dataset. It shows that design agency is redistributed unevenly across the project lifecycle, expanding in early design stages where tools act as creative collaborators, and contracting under efficiency-driven logics in later stages where automation prioritises monitoring and compliance over qualitative judgement. Cross-referencing against secondary parameters such as building typology, user group, tool maturity, and regulatory context surfaces fundamental gaps in current AI provision. The selected tools predominantly support residential and commercial applications. Documented regional orientations include North American and European standards, while coverage of other regions and typologies is less evident within the sample. To assess scoring consistency, ten AEC professionals and the author independently evaluated a subset of five tools, with one tool representing each of RIBA Stages 1–5. Intraclass correlation analysis demonstrated strong panel-level inter-rater reliability for both constructs, while comparison of the author's scores with the expert consensus indicated close alignment. Following this calibration, the author independently applied the same evaluation framework to the remaining forty-five tools. Beyond its analytical application, the framework offers a practical means of informing future AI development and adoption. It gives toolmakers a vocabulary for embedding stakeholder values in development decisions, and architects a means of recognising embedded biases before adoption, so that increasing automation extends rather than erodes the disciplinary and cultural values of architecture as a whole.

Housing retrofit has become a key priority in the sustainability agenda due to the importance of decarbonising the housing stock to achieve climate change goals. The importance of housing retrofit is not solely related to decarbonisation, but a range of socio-economic and technical factors such as fuel poverty, health and well-being of the occupants. Despite its importance, housing retrofits stagnate in most contexts due to poor engagement from homeowners. There are criticisms that the retrofit drives have not focused on the homeowner behaviour. They are designed as a top-down approach under technical rational models. The key questions of this study are what the constraints of resident engagement in housing retrofit are and how homeowners can be better engaged with the retrofit process. Accordingly, this study aims to understand the homeowner behaviour in the context of housing retrofit for better homeowner-centred retrofit project delivery. The study was conducted using semi-structured interviews with 40 retrofit industry stakeholders. The findings can be summarised as changing the investment focus of housing retrofit into a consumption focus, changing the property-centred retrofit approach to a homeowner-centred approach and undertaking a socially contextualised neighbourhood approach to drive housing retrofit. One specific contribution of this study is the identification of the housing retrofit strategies that already worked. The other contribution is how to change the existing strategies for better homeowner engagement. The novelty of the paper lies in the empirically strong recommendations for retrofit at scale solutions.

The Net Zero debate is getting more contested as 25% of the UK emissions are directly attributable to the built environment, and 80% of it is expected to come from the existing building stock. Hence, decarbonising the existing building stock is significant, as the domestic housing sector dominates. There is a strong connection between the UK government policies and the progression of housing retrofit. However, limited studies have reviewed this interdependency. The Stern Review validated the importance of early action on climate change two decades ago. Ever since the UK adopted a strong climate change agenda when developing policies. This study aimed to analyse the housing retrofit policy actions over the last two decades and their influence on improving the performance of the housing stock. The study is limited to analysing policy actions relevant to England, which maintains the largest residential housing stock in the UK, with 26 million homes compared with Scotland’s 2.5 million, Wales’s 1.5 million and Northern Ireland’s 0.8 million, while keeping the narrative in the UK context. The detailed policy review, along with political party manifesto analysis, was undertaken as the main data collection strategy. The data was analysed chronologically to explain the patterns and underline narratives. Findings reveal that the existing retrofit policies are not always in favour of the broader sustainability requirements of the country. Governments have changed their direction quite often and focused on short-term priorities for long-term gains. There is a critical need for robust, consistent and transparent policies (interconnected with other policies) as a long-term strategy for achieving sustainable goals.

Housing stock is observed to be associated with high carbon emissions, high fuel poverty and low comfort levels in the UK. Retrofitting the housing stock is one of the best solutions to address these problems. This paper directly corresponds with human and planetary health in terms of climate change, human health and mental health by addressing the challenges of housing retrofit at scale. Retrofitting houses can also contribute to social equity, reduced use of planetary resources and better financial and physical comfort. Despite the availability of the right technology, government grants and the potential to acquire supply chain and skilled labour, the progress of retrofit is extremely poor. Importantly, the UK is off track to achieve net zero by 2050, and the housing stock contributes 18.72% of the total emissions. The problem is further exacerbated by the 30.4 million units of housing stock. Robust strategies are required to retrofit the housing stock at scale. The study uses a qualitative modelling method under the diffusion of innovations theory to formulate a retrofit-at-scale strategy for the UK. Findings recommend focusing on skill development, show homes, research and innovation, supply chain development, business models, government grants and regulatory tools in a trajectory from 2025 to 2050. The proposed strategy is aligned with the segments of the diffusion of innovation theory. Although the analysis was performed with reference to the UK, the findings are transferable, considering the broader and urgent concerns related to human and planetary health.

Retrofitting the UK building stock is a key priority due to the importance of achieving sustainability goals, preferably before 2050. This goal will not be achieved without reducing energy consumption and making houses more comfortable, healthier, and cheaper to heat. One of the key challenges of building retrofit is skill shortage. The retrofit industry will need a number of professionals under the roles of retrofit assessors, coordinators, and designers. However, the existing university programmes do not directly produce retrofit professionals. Most construction-related university programmes do not emphasise or introduce retrofits. To address this skill shortage, this paper proposes a master’s programme in retrofit, which is directly aimed at producing retrofit professionals. Two specialisations are recommended under the master’s programme, namely architectural design and project management, with accreditations from relevant professional bodies. The objective is to produce a market-ready graduate who can be directly employed as a retrofit assessor, coordinator, or designer. Ten syllabuses related to retrofit professional courses were analysed to design the syllabus of the proposed master’s programme. The master’s programme will help to produce industry-ready retrofit professionals through either physical or online delivery methods.

Design science research (DSR) has become a popular method in information systems research and has been warmly welcomed in other disciplines as well. The importance of DSR is evident, in terms of its contribution to knowledge, as well as the creation of artefacts to solve problems of common interest. While it has demonstrated a clear methodology for achieving research goals, the philosophical underpinnings are not widely synthesised. There are inconsistencies and voids related to the philosophical aspects of DSR. For example, there is an inconsistent argument among researchers regarding the definition of design science research in the first place. This study analysed six key texts published within the last fifteen years in design science research along with a critical discussion, with the help of the existing literature. Accordingly, the study presents suggestions for the philosophical aspects of DSR. Namely, the definitions related to DSR terms (design, design science, design science research, and research), philosophical aspects (ontology, epistemology, and axiology), and theory development approaches (inductive, deductive, abductive, and retroductive), as well as research strategies were discussed. This is recommended to take as a starting point for a formative discussion of the topic, fine-tuning ideas with a critical eye.

Housing retrofit plays a pivotal role in achieving sustainability goals. The fragmented nature of the retrofit industry has been identified as a barrier to driving retrofit at scale. The study aims to analyse how to strategically improve the concept of the one-stop-shop model to drive housing retrofit at scale with the help of existing literature. The concept of a one-stop-shop model provides all the retrofit services with a single contact to the client. A systematic literature review approach was used. Only peer-reviewed journal articles, book chapters and conference articles published from 2016 to 2025 in English were selected. There are 12 shortlisted journal and conference proceedings articles critically evaluated under three themes: delivery method, ownership structure and level of responsibility. The findings highlight the different characteristics of the one-stop-shop model under these themes. Considering the existing case studies, starting a one-stop shop under a hybrid delivery method and a medium level of responsibility is recommended for retrofit at scale. The ownership structure shall be context-specific. Limitations could be given as the researcher bias and the missed articles in databases not considered for this review. Further research is suggested on how the characteristics of a one-stop shop can be customised, considering the context-specific resources and purposes.

Retrofitting the existing housing stock to a high level of energy efficiency will not be limited to achieving the decarbonisation of 80.3 MtCO2e residential emissions and reducing fuel poverty in 4.16 million households, but also improving the health and well-being of UK residents and their overall quality of life. The current progress of housing retrofitting is poor, at less than 1%. The UK expects to achieve net zero by 2050, and the challenge is immense as there are more than 30 million houses. The challenge is similar in other global contexts. Even if the required technology, supply chain, skilled labour, and finance could have been provided, the retrofitting would not move forward without positive engagement from the clients. Proper strategies are required to retrofit at scale. Focusing on the challenges of stakeholder engagement in housing retrofitting, this study focused on developing a hybrid one-stop shop solution through design science research. A theoretical artefact and an empirical system requirement specification document were developed to propose a one-stop shop solution. This was tested through retrofit industry stakeholders. Findings reveal that the one-stop shop model will be a good answer to retrofitting at scale, providing the resident engagement of 30.1 million households. The model can support residents with or without computer literacy due to its hybrid approach. The proposed theoretical and industrial models can be used as base models for developing one-stop shops for housing retrofitting by adapting them for context-specific requirements.

The study focused on the procurement routes and the forms of contract, currently used in the UK housing retrofit industry. Importantly, the contracts between the clients and the contractors were investigated. This study used a qualitative approach with a critical literature review and semi-structured interview data collection for the methodology. The findings show that the housing retrofit industry does not use any standard form of contract in general. Most contractors use guarantees, warranties, and invoices instead of standard forms of contract. They usually use bespoke contracts if contract administration is required. This is because there is nothing wrong with the existing way of addressing contract administration in retrofit. As the UK needs to retrofit 30.1 million houses, there can be contractual disputes aggregating to 8.1 million properties or GBP 221.4 billion project value. The study recommends using standard forms of contract to avoid and reduce the detrimental effects of contractual disputes in housing retrofit in the future.