Some towns are shaped by a river, or a road, or a railway. Berkeley was shaped by a castle. The keep that Robert Fitzharding rebuilt in stone around 1153 has stood above the Severn Vale for the better part of nine centuries, and the town that grew in its shadow took its cues from it — the pink and grey Severn sandstone in the walls, the modest scale of buildings that knew their place beside a fortified seat, the slow, steady growth of a settlement that never needed to shout. As an architect, what strikes me about Berkeley is how legible that relationship still is. The castle set the tone, the town listened, and the result is a place with a material consistency and a quiet confidence that you feel the moment you walk through Market Place.
Award-winning Architects in Berkeley
An Award-Winning Practice Working Across the Country
I founded Gresford Architects in London in 2006, and we are now based in Oxford, working with clients across the country. We are RIBA chartered and ARB registered, and our work spans everything from certified Passivhaus new builds to careful renovations of heritage buildings. The Deerings, a Passivhaus home we designed in Hertfordshire, won the RIBA East Award in 2018 — the same year I was shortlisted as Sustainability Architect of the Year at the Building Design Awards. Our membership of SPAB, the Passivhaus Trust, and The Green Register reflects a practice built on the conviction that sustainability and heritage sensitivity are not opposites but partners. In a town like Berkeley, where the majority of buildings date from before 1840 and the conservation area covers the historic core, that combination is exactly what good architecture demands.
Architectural Services for a Castle Town on the Severn
Extension Design in Berkeley means working within a conservation area where Stroud District Council will scrutinise every proposal for its impact on the townscape. The challenge is not simply one of planning approval — it is a question of material honesty. The older properties in Berkeley are built from Severn sandstone, that distinctive pink and grey stone you see in the castle gatehouse and in the rubble walls throughout the conservation area. An extension that arrives in render or reconstituted stone will always look like an afterthought. Getting the material right — matching the coursing, the colour variation, the texture of the mortar joints — is the difference between an addition that belongs and one that merely sits alongside. We approach every extension as an opportunity to add space, light, and comfort while respecting what is already there.
Renovations in Berkeley often begin with the same material. The Grade I listed Church of St Mary the Virgin, founded in the twelfth century with the present building dating largely from the thirteenth century onward, is built from random coursed rubblestone — a construction that demands particular care when it comes to moisture management, pointing, and structural repair. Many of the town's residential buildings share that rubblestone character, and renovating them well means understanding how Severn sandstone behaves: how it weathers, where it absorbs moisture, how lime mortar allows the wall to breathe in a way that cement pointing never will. Our membership of SPAB — the Society for the Protection of Ancient Buildings — informs every decision we make in buildings like these, where the wrong intervention can cause more harm than the original problem.
EnerPHit, the Passivhaus Institute's certified retrofit standard, offers a disciplined route to transforming the thermal performance of these older homes without compromising their fabric. In Berkeley, where so much of the housing stock is solid-walled sandstone with no cavity, the retrofit strategy has to be carefully detailed to manage moisture risk. Internal wall insulation, airtightness improvements, and mechanical ventilation with heat recovery can bring a pre-1840 home in Berkeley up to a measurable, certified performance standard — reducing energy bills, eliminating draughts, and making the building genuinely comfortable year-round. The Chantry, the early eighteenth-century Grade II* listed house where Edward Jenner lived, is a reminder that Berkeley's older buildings were built to endure; EnerPHit ensures they perform as well as they last.
Sustainable Design is the thread that connects every service we offer, and in Berkeley it means working with the materials and conditions the Severn Vale provides rather than against them. Reducing embodied carbon, specifying locally appropriate materials, and designing for long-term durability are not abstract principles here — they are practical responses to a town whose buildings have already demonstrated what longevity looks like. New Build Design on any sites that emerge in or around Berkeley should respond to the existing grain and scale, drawing on the sandstone palette rather than importing something foreign. PassivHaus Design brings the most rigorous energy performance standard to new homes — superinsulated, airtight, with mechanical ventilation and heat recovery — delivering comfort, economy, and minimal environmental impact. For sites in the open countryside between Berkeley and the Severn, Paragraph 84 of the National Planning Policy Framework provides a route for truly exceptional homes that justify their rural setting through outstanding design quality.
Berkeley is a town that has been shaped by its stone and its history for nearly a thousand years, and that is precisely what makes it a rewarding place to work as an architect. If you are considering an extension, renovation, or new home here, we would welcome the conversation.