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Our approach reflects director George Morgan’s background at leading design-led architectural practices, and our central ethos of sustainability.

Our clients are at the heart of each project as we work to meet their project aspirations in a responsible way. We add value through design, taking a holistic approach to project budgets, while making places that bring joy to everyday life and respect their environmental context.

We have a network of skilled and motivated collaborators to help deliver a project that meets your aspirations, budget and timescales. We can coordinate the whole process from concept design, planning, approvals and construction.



ONE POINT FIVE refers to the IPPC target of keeping global heating under 1.5 degrees. We take a rigorous approach to delivering beautiful, convivial architecture that recognises our planetary boundaries. Architectural projects have many aspects of sustainability: energy use from the building and associated transport, material impacts, cultural and economic issues, and biodiversity.

A good location reduces the energy needed to get to and from the building. Our urban design work focusses on increasing densities to create walkable, sociable places; our detailed understanding of planning and typology unlocking the development capacity of each site.

We need to slash energy use of new and existing buildings. We recommend the Passivhaus methodology to reliably deliver very low energy buildings.

The right building materials can help us move toward a regenerative economy by locking up carbon in the building structure and benefit human health by improving indoor air quality.

We always aim to improve the quality of spaces for nature at a range of scales, such as by rewilding land, using sustainable urban drainage systems to create watery habitats, and spaces for diverse planting.



Passivhaus, or Passive House, is a methodology for delivering buildings - of all kinds - that are comfortable thoughout the year, while using a fraction of the energy for heating/cooling of a typical new build. And it’s proven: the detailed modelling, testing and certification process ensures that buildings actually perform as designed, closing the ‘performance gap’ that best previous ideas of eco-house design.

Director George Morgan is a Certified Passivhaus Designer. We recommend Passivhaus for all our new build projects, and where suitable its cousin Enerfit for low-energy refurbishments.



Architects Declare is a manifesto for changing architectural practice to address the crises of climate breakdown and ecological collapse.

As signatories, One Point Five Architecture will seek to:

  • Raise awareness of the climate and biodiversity emergencies and the urgent need for action amongst our clients and supply chains.

  • Advocate for faster change in our industry towards regenerative design practices and a higher Governmental funding priority to support this.

  • Establish climate and biodiversity mitigation principles as the key measure of our industry’s success: demonstrated through awards, prizes and listings.

  • Share knowledge and research to that end on an open source basis.

  • Evaluate all new projects against the aspiration to contribute positively to mitigating climate breakdown, and encourage our clients to adopt this approach.

  • Upgrade existing buildings for extended use as a more carbon efficient alternative to demolition and new build whenever there is a viable choice.

  • Include life cycle costing, whole life carbon modelling and post occupancy evaluation as part of our basic scope of work, to reduce both embodied and operational resource use.

  • Adopt more regenerative design principles in our studios, with the aim of designing architecture and urbanism that goes beyond the standard of net zero carbon in use.

  • Collaborate with engineers, contractors and clients to further reduce construction waste.

  • Accelerate the shift to low embodied carbon materials in all our work.

  • Minimise wasteful use of resources in architecture and urban planning, both in quantum and in detail.