Project Highlight: London Borough Townhouse

Transforming a London Townhouse with Eterno Windows

Nestled in the heart of central London, just a stone’s throw from the Shard and the Thames, this traditional townhouse has undergone a bold architectural transformation. Designed entirely by the homeowner—an industrial designer with a background in large-scale art installations—the project added two new storeys to a narrow Victorian terrace, marrying the classic shell with modern living requirements.

In a city where outward expansion is often impossible, going vertical is the only practical path to more space. But in doing so, every design element must work harder—especially the windows.

Modern family life demands openness, flexibility, and connection to the outside world. The upper floors had to do more than just add square metres—they needed to feel expansive, airy, and calm despite the intense urban setting. That’s where the choice of glazing became absolutely critical.

Advantages of Composite Aluminium-Clad Windows

The homeowner opted for Eterno’s timber aluminium-clad windows—a product perfectly suited for this complex brief. Installed across the new top floors, the large-format glazing does far more than offer a view. It solves multiple urban challenges in one clean solution:

• Noise reduction: Located on a busy London street, the house faces constant traffic, sirens, and urban commotion. The high-spec, composite windows and doors supplied by Eterno drastically cut external noise—creating a peaceful interior refuge. And the best part is, you don’t even need triple glazed windows to achieve that, our superior insulation windows offer an unmatched sound insulation even with double glazed panes.
• Thermal regulation: With unpredictable cold snaps and increasingly extreme summer heatwaves, insulation was non-negotiable. The composite windows and doors supplied by Eterno offer a superior thermal performance, keeping the top floors warm in winter and cool in summer, even under direct sunlight.

• Protection from pollution: The outer aluminium cladding of the composite windows serves a critical role—it protects the timber frames from city pollution, rain, and grime without compromising aesthetics on the inside. In a city where soot, dust, and automotive emissions are a daily reality, this cladding extends the life of the windows and maintains their appearance.
• Low maintenance: Working at height presents its own hazards. Choosing durable, anodised aluminium cladding externally means the homeowner avoids regular repainting or sanding—especially crucial on upper storeys where access is limited.
• Maximising light in narrow spaces: Victorian homes are known for their constrained layouts. Oversized glazing with slim sightlines helps flood the home with natural light, making narrow rooms feel broader and more open.

“The windows were non-negotiable—they had to perform across every metric: minimalist design, impeccable insulation and noise reduction, and easy maintenance. Eterno nailed it.”

In the end, the windows don’t just serve the architecture—they define it. From inside, they frame the stunning panoramic views over London city. From outside, they integrate seamlessly into the building’s new silhouette, hinting at the contemporary life unfolding within.

From Concept to Completion: A Bespoke Glazing Journey with Eterno Windows

After a thorough research into glazing suppliers and their products, including all the well-known brands, the owners ultimately chose Eterno Windows.

“We liked their their hands-on approach and ability to deliver a truly bespoke window solutions. Where larger companies felt rigid and impersonal, Eterno offered flexibility, insight, and genuine collaboration. From early-stage concepts through to shop drawings, technical detailing and cost engineering, the Eterno team was there every step of the way, guiding difficult design decisions and refining the glazing package to meet both aesthetic and performance goals.”