The operation is part of a plan to generate value after fully transforming the building, which is located on one of Barcelona’s most consolidated business streets.
Barcelona, 16 December 2025 – Alting Group has closed a deal to sell the building at Diagonal Avenue, 431 bis to Banca March, in an operation mediated by JLL Private Wealth Barcelona.
The transaction is part of the group’s asset repositioning and rotation strategy and culminates a process that began with purchasing the propertyin October 2024 and fully transforming it, carried out by the Alting Group investment, development and sales teams.
Located in the heart of Avinguda Diagonal, the building is 6,186 m2 and has undergone an in-depth redesign and repositioning process to adapt it to new market demands.
As a result, the asset has been granted LEED Gold certification and become a Class A office building, making it even more attractive in this increasingly popular area for financial and corporate activity that is now seeing the highest prime rental prices in the city.
As Deputy Director General Javier Marcos noted, “The operation is part of our strategy to maximise asset value through internal management. Our technical and sales teams were in charge of establishing what product to develop, and Diagonal 431 bis is the perfect example of how a strategic location, paired with a comprehensive transformation, can adapt a property to market changes and take advantage of opportunities at just the right time.”
Diagonal Avenue, consolidates role as city’s financial mile
This operation further strengthens Alting’s position as a real-estate group active in the Barcelona real-estate market with a strategy focused on investment, management and repositioning of assets in strategic locations. The company carries out projects in Madrid and Barcelona, in the residential, tertiary and hotel segments, with a holistic approach that seeks to maximise the value of each asset throughout its life cycle, from purchase and management of the property to its incorporation into the company’s portfolio of assets for rent.
Our ability to anticipate market trends and adapt properties to new needs of users and investors has allowed the Alting Group to consolidate its model for generating sustained, lasting, sustainable growth, particularly in prime urban settings such as Avinguda Diagonal, one of the most vibrant, attractive streets in the city.
In recent years, Avinguda Diagonal, particularly the section between Francesc Macià and Passeig de Gràcia, has become known as Barcelona’s financial mile, with a high concentration of bank headquarters and companies in the financial sector. This shift is due to the companies’ need for larger, more efficient spaces that meet current standards, which is more difficult on historical streets like Passeig de Gràcia. Avinguda Diagonal, given its accessibility and space for large corporate buildings, has become the city’s main business and financial street (as JLL reflects in its market report).
Asset repositioning and rotation strategy
The sale of Diagonal 431 bis is part of the Alting Group’s strategy, freeing up resources to continue promoting new investments and identifying opportunities in prime locations, maintaining a balanced portfolio aligned with market evolution.
“We remain committed to assets with a long life ahead, where we can add value through our strategic vision in the long term,” adds Alting Deputy Director General Javier Marcos. “Our focus allows us to adapt to market changes and keep generating opportunities in line with our business model.”
About Alting
Alting Real Estate Group has been in the Spanish real estate business for 48 years and has a diversified portfolio of hotel, residential, tertiary and retail assets, as well as a clear long-term dedication to strategic locations in Barcelona and Madrid. The group is currently working on various projects and has recently delivered several hotel assets in Madrid, as well as having projects under way in Barcelona in the residential, office and hotel segments, while continuing to analyse new investment opportunities in both capitals.
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For more information:
Alting Group | Head of Communication
Imma Pérez · iperez@alting.com
93 505 40 40 · www.alting.com
