The lighting and furniture companies share a space on the ground floor of the Allén building designed by Swedish architect Johannes Norlander.
The No 51 showroom interior – designed by Stockholm architects Guise – aims to reflect the building's exterior.
"It's not a coincidence that we picked this area, because this used to be a very industrial area of Stockholm in the 1970s and 1980s," said Massproductions co-founder Magnus Elebäck. "What brings us together is that we're looking at the culture and industry, and making products that contribute to that."
Inside, original elements of the building were exposed. Monolithic concrete walls are used to divide the space, and natural light pours in through a wall of windows throughout the day.
"You could call it our interpretation of Modernism 2.0," said Guise's Jani Kristoffersen. "We wanted to create a clean space with no superfluous embellishment, honest materials and clarity of function, purpose and construction."
The similarities in both work ethic and aesthetic is what Wästberg founder Magnus Wästberg said brought the two companies together.
"From a mentality point of view, we are very likeminded," he said. "We both have our own idiosyncratic design languages and could care less about passing fads, so in many respects we are a very good match."
"The building itself, the interior design, the products and the operations combine into a holistic representation of Massproductions' and Wästberg's work," he continued.
Massproductions was launched in 2009 by Magnus Elebäck and Chris Martin – a year after Magnus Wästberg began his self-titled company.