San Francisco Museum of Modern Art (SFMOMA) in California, US, has revealed detailed designs for its proposed expansion project, the scope of which has now been increased.

The attraction has revealed that it has raised its fundraising goal by 15 per cent to US$555m (£354m, EUR411m) to help create more spaces for education, exhibitions and collections.

Building on concept designs unveiled in May, new detailed proposals comprise ground-level galleries and orientation spaces that will be free for the public to access.

Norway-based Snøhetta has worked with SFMOMA and local architects EHDD to draw up the plans, while Webcor is also involved. Work is due to start in summer 2013.

Upon completion in 2016, the new building and the existing Mario Botta-designed facility will provide a total of 130,000sq ft (12,077sq m) of exhibition space for the attraction.

SFMOMA director Neal Benezra said: "As we enter the public phase of the campaign, we hope even more people in the community will support us in creating an even more dynamic institution."

San Francisco mayor Ed Lee added: "The city of San Francisco has a great partner in SFMOMA, and all of our residents and visitors will be enriched by the expansion."

Details: www.sfmoma.org

Image: Snøhetta/SFMOMA