Sustainable by Nature: How Conservation Thinking Shapes Our Design Approach

Many people still ask: “What can a conservation‑focused architecture studio really contribute to the sustainability ambitions of my project?”. It’s a fair question, shaped by years of thinking that sustainable design is mostly about add‑ons, new technologies, or building from scratch.

The evidence tells a different story. Across the UK and Europe, studies consistently show that the greenest building is the one that already exists. Around 80% of the buildings that will be standing in 2050 are already built, and the carbon locked into those structures represents one of our greatest environmental assets. Demolition and replacement carry a heavy carbon cost; with thoughtful adaptation, repair, and reuse this can be significantly reduced.

Policy is shifting in the same direction. From national retrofit strategies to local authority climate plans, the emphasis is increasingly on extending the life of existing buildings, improving performance, and making them work harder for their communities. Conservation architecture sits at the centre of this transition — not as a niche specialism, but as a critical route to genuine sustainability.

With that in mind, we’ve outlined below the guiding principles that shape our approach to architecture and sustainable reuse.

• 1 Low embodied Carbon

  Low‑embodied‑carbon design is shaped by a series of decisions made long before construction begins. In our work, the greatest influence comes from how much of the existing building fabric we retain and the materials we specify. These choices directly affect a project’s whole‑life carbon performance. Our aims are:

  • Prioritise the retention and repair of existing fabric, preserving the carbon already invested in the building and avoiding the emissions associated with demolition and replacement.

  • Specify locally produced materials, including locally manufactured components, to reduce transport emissions and support regional supply chains.

  • Choose materials with inherently low embodied carbon, such as recycled, recyclable, bio‑based, or low‑energy‑production products, aligned with recognised lifecycle‑assessment principles. (Some natural materials such as timber, wood fibre, cork and hemp-lime can even sequester carbon, storing more CO₂ than is emitted during their production.

  • Minimise reliance on high‑carbon materials like steel and concrete, using them only where structurally essential and exploring lower‑carbon alternatives wherever feasible.

  Together, these strategies form the backbone of a genuinely low‑carbon approach — one that reduces upfront emissions, extends the life of existing buildings, and supports long‑term environmental resilience.

• 2 Natural materials

  Working with historic buildings gives us a deep, practical understanding of how moisture moves through natural materials such as plaster, stone, timber and brick. These materials behave differently from modern construction products, and their performance depends on allowing moisture to move, evaporate and regulate naturally. Through careful detailing and appropriate ventilation strategies, we design in a way that supports this natural balance.

  Breathability is central to building performance. A wet wall can perform up to 30% worse than a dry one, so using materials that allow moisture to pass through and dissipate is essential for both energy efficiency and long‑term fabric health.

  Natural materials also create healthier internal environments — warm, dry, well‑ventilated spaces with good air quality and fewer chemical additives.

• 3 Sustainable energy

  There are many approaches to delivering sustainable energy in buildings, and the right solution depends on the scale, age and character of the property. Our approach follows a fabric‑first hierarchy: we reduce energy demand before introducing new technologies. In historic buildings, for example, renewable systems are not always feasible due to regulatory constraints, visual impact or the need to protect significant fabric. In these cases, we return to the fundamentals — optimising the building envelope through insulation, airtightness, ventilation and careful detailing.

  Where renewable technologies are appropriate, we ensure they are right‑sized, effective and proportionate to the building’s reduced energy demand. We also consider the whole‑life carbon impact of any system, recognising that embodied carbon, maintenance cycles and eventual replacement all influence long‑term sustainability.

  Across all projects, we take a holistic, practical view — balancing the client’s needs, the building’s heritage and what is genuinely achievable. Our aim is to deliver energy strategies that are robust, low‑maintenance and easy for occupants to operate, ensuring they perform well not just on paper but in everyday use.

• 4 Low Maintenance

  Long‑term sustainability depends on buildings that are designed to last. We prioritise durable materials and robust detailing so that the building performs well with minimal intervention. By reducing the need for frequent repairs or complex upkeep, we support both environmental resilience and lower lifetime costs for the people who use the building.

• 5 Low Energy Demand

  Item descriptionOur aim is to design buildings where the fabric does most of the work — keeping heat in, keeping draughts out, and reducing the overall demand for heating. Good levels of natural daylight further lower energy use by reducing reliance on artificial lighting.

  We improve airtightness while ensuring healthy, controlled ventilation, and we design details that minimise thermal bridging to prevent unnecessary heat loss. We also consider summer comfort, using shading, orientation and natural ventilation to reduce overheating and avoid the need for mechanical cooling.

• 6 Design for Deconstruction

  We design with the long term in mind. If a building is ever altered or dismantled in the future, we specify materials that can be reused, recycled, or returned to the supply chain, reducing waste and preserving the value already invested in the fabric.

  As noted above, around 80% of the buildings that will exist in 2050 are already standing. To make the most of this existing stock, buildings must be adaptable, flexible, and capable of evolving as needs change. Designing for future alteration — through thoughtful detailing, reversible construction, and a circular‑economy mindset — ensures that today’s decisions continue to deliver environmental value for decades to come.

• 7 Saving Water

  Climate change is placing increasing pressure on our water systems, with long dry spells followed by short, intense periods of rainfall. To reduce demand on public supply and sewer networks, we prioritise rainwater harvesting and grey‑water reuse, ensuring that treated drinking water is reserved for essential uses.

  We also design sites to cope with heavy downpours by incorporating permeable surfaces and wider Sustainable Drainage Systems (SuDS) — such as rain gardens, swales and attenuation features — allowing water to soak away naturally rather than overwhelming drainage infrastructure.

  Inside the building, we specify water‑efficient fixtures and fittings to reduce everyday consumption, supporting long‑term resilience without compromising comfort. As with all sustainable systems, our approach emphasises simplicity and low maintenance, ensuring that water‑saving measures are easy for occupants to use and manage.

To read more about our Conservation services please click here.

If you’re interesting in reading about one of our projects where the above principals were applied please click here.