Imagine transforming a cramped, outdated home into a spacious, modern sanctuary—all while reducing its floor space. Sounds impossible, right? But that’s exactly what Clementine and David Sellick achieved, turning a rundown 1950s house into a future-ready family haven. Here’s how they did it—and why it’s sparking conversations about innovative home design.
With their family growing from two to four children, the Sellicks found their charming 16th-century semi-detached home in Bletchingley, Surrey, bursting at the seams. “I adored the character of the house,” Clementine recalls, “but with four kids, we were desperately short on space.” Unable to extend due to local restrictions, they faced a tough decision: move or rethink. They chose the latter—but with a twist.
Here’s where it gets controversial: Instead of hunting for a larger, older property, they took their sister-in-law’s advice and considered a 1950s house they’d initially dismissed. “It was damp, cold, and smelled awful,” Clementine admits. “But it had potential—a blank canvas with a massive garden and stunning views.” Bold move? Absolutely. But it paid off.
The house had a haphazard single-storey extension, a tacked-on breakfast room, and a conservatory that felt disconnected. Worse, a poorly repositioned front door had left a manhole—and its odors—inside the house. “I’d literally stick my arm down the manhole with a stick to clear sewage blockages,” Clementine shares. “It was a monthly ritual.” Yet, they saw beyond the flaws.
Their initial plan? Add a second floor to the extension, creating six bedrooms and five bathrooms. But here’s the part most people miss: Green belt rules blocked their vision. The house’s existing extensions had already doubled its size, leaving no room for proportionate additions without shrinking the overall area—defeating the purpose of accommodating their family.
Enter architect Benjamin Wells, founder of Medium, who proposed a retrofit solution using permitted development rights. His revised design retained the single-storey extension but reimagined it entirely. The result? Four bedrooms, two bathrooms, and an open-beamed dining hall linking the extension to the main house. The main house’s upper floor became a master suite and guest room, while the overall footprint shrank by 17 square meters.
But is smaller really better? The Sellicks say yes. “Every room is now fully utilized,” David explains. “The kitchen and dining hall are the heart of the home.” Clementine adds, “The flow is seamless—it’s like night and day compared to before.” And the sustainability features? Double glazing, cavity insulation, and future-ready fittings for solar panels and an air-source heat pump.
The build wasn’t without challenges. Unstable walls, a makeshift scaffolding pole in the kitchen, and a two-week family displacement during construction tested their resolve. “We even hosted Christmas for 16 people without a proper kitchen,” Clementine laughs. “It was chaotic but magical.”
Completed in January 2024, the project won the AJ Retrofit and Reuse Award in 2025. But here’s the real question: Would you trade historic charm for modern efficiency? Clementine admits, “I’d find it hard to go back to an old house now.”
What do you think? Is this a brilliant solution for growing families, or does it sacrifice too much character? Let’s debate in the comments!
