Belsize Park

A complete transformation of a two-storey, Grade-II listed flat in London’s Belsize Park, designed to meet the needs of a growing family while blending original architectural features with bold, modern design.

Modern glass extension adjacent to a red brick Victorian building, surrounded by greenery and decorative pebbles, showcasing luxury home renovation in London.
Glass extension in modern interior design, showcasing natural light and garden views, part of luxury renovation of Grade-II listed flat in Belsize Park.

Challenges

Working with listed-building restrictions, poor ground conditions, and tight site access. Engineering a glass extension on unstable ground and preserving original features within a modern redesign.

Modern interior space with wooden flooring, sleek black cabinetry, and artistic wire pendant lights illuminating an open area leading to glass doors and a garden view, reflecting luxury home renovation trends in London.

Key Stats

Location: Belsize Park, London
Property: 2-storey Grade-II listed flat
Scope: Full interior refurb, glass extension, new garden studio
Partners: LBMV Architects, Symmetrys, Capital Piling

Bespoke glass extension of a Grade-II listed flat in Belsize Park, showcasing modern design with original architectural features, surrounded by landscaped patio and greenery.
Modern interior of a Grade-II listed flat in Belsize Park, featuring sleek black cabinetry, open layout with natural light, and glass walls leading to a garden.

Bespoke Luxury Transformation: Grade-II Listed Flat in Belsize Park

We retained original arches and staircase to celebrate the building’s character, while adding a sleek glass extension using screw pile foundations and a suspended slab. Glass panels were craned over four storeys. The modern timber-clad garden studio, added mid-project, uses Japanese yakisugi cladding with a birch ply interior and eco green roof.

Interior view of a modernized Grade-II listed flat in Belsize Park, featuring a sleek glass extension, original staircase, and wooden flooring, highlighting the blend of contemporary design with historical architecture.
Modern kitchen design with sleek dark cabinetry, integrated appliances, and minimalist aesthetics, showcasing a blend of functionality and contemporary style in a Grade-II listed flat renovation in Belsize Park.

The Results

A striking mix of old and new. More daylight, better flow, and a modern garden studio that’s anything but a shed — all tailored to the family’s evolving needs.

What our clients say about us

Marek and his team are truly outstanding professionals and incredibly courteous individuals across the team.

Volker

It was important to work with an experienced building company and Convert exceeded our expectations. 

Robert
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