A conservation officer once said something to me on site that stopped me in my tracks.

"I'm a conservation officer," he said, " my job is to conserve everything."

I understood what she meant. But I don't think that's quite right.

A conservation officer's job, and mine, as a conservation architect, is to manage change. Because the alternative to managed change isn't a building perfectly preserved in amber. It's a building that quietly falls apart because nobody can afford to maintain it, nobody wants to live in it, and nobody feels it belongs to them anymore.

Historic buildings don't survive because they stand still. They survive because people keep using them.

BUILDINGS ARE NOT MUSEUM ARTEFACTS

Even when that building is a museum, and even then, it should fulfil its purpose. That doesn't mean ripping everything out. It might mean adapting how you live to suit the building. But it also means the building has to adapt to suit you.

That is, in fact, the entire history of buildings.

Every historic building you've ever admired is a palimpsest — a layered document of every owner, every generation, every change in need, culture, finances and taste that has passed through it. The timber frame, the Georgian sash, the Victorian scullery, the 1970s extension — all of it is history. Pretending that history stopped at some arbitrary point isn't conservation. It's a fiction.

THE REAL THREAT IS NOT CHANGE — IT'S NEGLECT

Empty buildings deteriorate fast. Roofs leak, windows fail, interiors decay. When a building loses its purpose, it loses its advocates. And once a community stops feeling that a building is part of them, the argument for keeping it becomes very hard to win.

The most dangerous thing you can do to a historic building is make it impossible to use.

ADAPTIVE REUSE IS CONSERVATION

When original use is no longer viable because the congregation has gone, the industry has left, the working pattern has shifted, giving a building a new purpose can be one of the most powerful acts of preservation available to us.

A former factory becomes workspace or housing. A redundant church becomes a community hub. A warehouse becomes a market or a library. Done well, these changes don't erase the past. They are just another layer. New uses ask new questions of old buildings, and those questions, how do we make this accessible without destroying its character, how do we introduce new services without overwhelming the fabric, are exactly the kind of creative thinking that keeps heritage alive and relevant.

HISTORIC BUILDINGS SHAPE HOW WE KNOW WHERE WE ARE

It isn't only individual buildings that matter here. Our entire built landscape, the accumulation of streets, rooflines, materials, scales and details that have built up over centuries, is how we read a place and how we know we belong to it. All our buildings are a fundamental part of that. Strip them out, or let them fall silent and unused, and you don't just lose a building. You lose part of what makes a place feel like somewhere rather than anywhere.

THERE IS ALSO AN ENVIRONMENTAL ARGUMENT

Existing buildings contain embodied carbon, the energy already spent making, transporting and assembling their materials. Demolishing and rebuilding wastes all of that. Careful adaptation and sensitive upgrading is almost always the lower-carbon choice, and increasingly the more financially rational one too.

CHANGE, YES — BUT WITH CARE

None of this means every change is acceptable. Significant features should be respected. New additions should be honest rather than pretending to be old. Where possible, alterations should be reversible, so future generations aren't locked into our decisions.

The question is never really whether a historic building should change. It's how it should change, and whether the people making that decision understand what they're working with, and can read all the layers that have come before.

That's where good conservation advice makes all the difference.

If you're living with a historic building and trying to work out how to add your own layer to its story, I'd love to help.