There is something deeply satisfying about a village that was built from its own ground. In Chearsley, the older walls are made of witchert — a chalky earth dug from the subsoil, mixed with water and chopped straw, and laid in thick raises on a rubblestone plinth. It is one of the best places in Buckinghamshire to see this tradition still standing: boundary walls that lean gently with age, cottage frontages rendered and limewashed over earth that has been doing its job for two or three hundred years. The sunken lanes that loop through the village are older still, worn down to the level they are now over a thousand years of use, and they give Chearsley a sense of enclosure and intimacy that no planned street layout could replicate. As an architect, what strikes me most is how completely the buildings belong to their site — not because of any grand design ambition, but because they were literally made from it.
Award-winning Architects in Chearsley
Conservation-Led Architecture from Gresford Architects
I founded Gresford Architects in London in 2006, and we now work from our studio in Oxford with clients across the country. My membership of the Society for the Protection of Ancient Buildings shaped how I think about older structures — not as problems to be solved, but as buildings with their own logic that deserves to be understood before anything is changed. My wife Phoebe is a conservation architect, and between us we bring a depth of heritage knowledge that is difficult to find in a single practice. That sensitivity sits alongside a serious commitment to environmental performance. Our Passivhaus home The Deerings won a RIBA East Award in 2018, I was shortlisted for Sustainability Architect of the Year at the Building Design Awards; in 2025 I was invited to judge the British Homes Awards. We hold that conservation and sustainability are not opposing forces — they are two expressions of the same principle: build well, waste nothing, respect what already exists.
How We Work with Homes in Chearsley
Chearsley has a designated conservation area and twenty-six listed buildings, a remarkable concentration for a village of its size. The witchert cottages, timber-framed houses and rubblestone walls that define its character require an architect who understands traditional construction — not just how it looks, but how it breathes, moves and ages. Renovations here begin with careful observation. Witchert walls behave differently from brick or stone; they need lime renders and breathable finishes, and they cannot tolerate the cement-based repairs that have damaged so many earth buildings elsewhere. When we undertake Renovations in Chearsley, we work with the building's original materials and methods, repairing rather than replacing, and ensuring that every intervention supports rather than undermines what has lasted centuries. Buckinghamshire Council handles planning for the village, and the conservation area status means that external alterations, demolitions and tree works all require careful consideration.
Many of the older homes in Chearsley are beautiful but thermally inefficient — draughty in winter, expensive to heat, and losing energy through walls and windows that were never designed for modern comfort expectations. EnerPHit, the Passivhaus retrofit standard, offers a disciplined route to dramatically improved thermal performance without destroying the character that makes these homes worth preserving. With witchert construction, the approach must be particularly sensitive: breathable internal insulation that allows moisture to migrate through the earth walls as it always has, high-performance glazing carefully detailed within existing openings, and airtightness improvements that work with rather than against the building's natural behaviour. We have lived in a home designed to Passivhaus standards ourselves, so this is not theoretical — we know what genuine thermal comfort feels and costs.
Extension Design in Chearsley asks a specific question: how do you add to a building made of earth, rubblestone and timber without diminishing what is already there? The conservation area requires that any extension demonstrate quality in its design and sensitivity to its setting. Witchert walls offer particular constraints and opportunities — a successful extension echoes the depth and earthiness of the original without trying to mimic it. The rubblestone plinths, the rendered surfaces that weather and age with the building, the rhythm of the eaves — these are the things an extension must listen to.
Sustainable Design runs through every project we take on. Witchert is earth building in its purest form — local material, minimal processing, enduring. Our approach to new work extends that philosophy: designing homes that are comfortable to inhabit, economical to run and more joyful to live in, using energy and materials as efficiently as possible. In a village built from its own subsoil, PassivHaus Design feels like a natural evolution rather than an imposition — achieving consistent indoor temperatures and exceptional air quality through design discipline rather than mechanical systems.
The countryside around Chearsley — ridge-top land above the River Thame valley — is exactly where Paragraph 84 of the National Planning Policy Framework opens the possibility of exceptional new homes. New Build Design under this route is not easier; it is harder. The architecture must be genuinely outstanding, sensitive to its landscape setting, and visibly enhance what is around it. But the homes that emerge from that discipline are the ones that belong.
Chearsley has been shaped by people who built with what was beneath their feet and around them — earth, stone, timber, straw. If you are considering work on a home in this village, we would welcome the chance to understand what you are trying to do.