A luxury loft-like apartment in London within a former musical instrument factory next to the city’s famed Hyde Park has come to the market.

With an asking price of £3.4 million (US$4.3 million), the converted top-floor spread listed earlier this month with Berkshire Hathaway HomeServices Kay & Co.

The penthouse is within The Brassworks, a building tucked away on a quiet residential mews, that was built in 1819 as a brass instrument factory for Distin’s Military Musical Instrument Manufactory and then by Boosey & Co., another well-known instrument manufacturer, according to a news release.

Following a conversion into offices, building alterations and decades worth of damage, London-based architects Belsize Architects were drafted to transform the building into residences, a project that was completed in 2012.

“The building was falling into disrepair,” reads the architects’ website, which notes how the firm used its conservation and design skills to create homes that respect the building’s heritage.

“The facade [was] cleaned and restored, and features, such as huge steel beams traversing each apartment, have been retained,” the architects continued.

Spanning close to 2,500 square feet, the contemporary home has an open-plan reception area, three bedrooms, three bathrooms, a more than 650-square-foot roof terrace, and views across the city, according to the listing. A representative from Berkshire Hathaway HomeServices Kay & Co. was not immediately available to comment on the property.

The home’s proximity to the city’s Hyde Park is an amenity in itself. A report from estate agency Knight Frank found that living adjacent to the open space will add 33.4% to the average value of a property.

Mansion Global couldn't determine who owns the property.