Architecture at Zero, now in its fourth year, is challenging all students, architects and designers worldwide to envision two mixed-use, zero net energy (ZNE) housing proposals for adjacent parcel sites in Oakland, California. The competition is a response to the ZNE targets set out by the California Public Utility Commission (CPUC) which aims for all new residential construction in the state to be ZNE by 2020. Entrants are eligible for winning up to $25,000. Early bird registration ends September 12. All projects must be submitted by October 31 at 1PM PST. Learn more on the competition website and review last year's winners.

With over 275 million visitors to the United States' 401 national parks per year, what will be the experience of visitors in the 21st century? The Van Alen Institute has teamed up with the National Park Service to launch a new competition: National Parks Now - a central component of Elsewhere: Escape and the Urban Landscape, the Institute's initiative to investigate how the form and organization of the built environment shapes a need and desire for escape. Operating on the belief, stated by Van Alen Institute Executive Director David van der Leer, that "too few people realize what a huge resource these smaller national park sites are for local communities and for larger urban networks," this initiative seeks to make parks relevant for the 21st century audience. More on the competition after the break.

As the first phase of the Guggenheim Helsinki design competition concludes, a group of independent arts organizations have launched a search for "alternative" proposals: The Next Helsinki. The counter-competition calls on architects, urbanists, landscape architects, artists, and "all others who love cities to suggest ways in which Helsinki and its South Harbor can be transformed for the maximum benefit of the city.” More information, after the break.

Imagine: After three years of careful dismantling, moving, painstakingly re-assembling and most importantly, restoring, John Notman’s historic Athenæum building has finally arrived at its new location in Fairmount Park, where it will serve as the headquarters of the newly formed Philadelphia chapter of the Friends of Brownstone (PhilaFOB). Flush with government funding from lottery and fracking revenue, PhilaFOB made the Athenæum Board of Directors an offer it couldn’t refuse. So now, for the first time since 1845, the lot at 6th & St. James Streets is vacant, and the Athenæum, still a vital independent lending and research library, with growing architectural and design collections, must re-imagine itself without its historic building. Given its location and its corporate purposes, what might a mid-21st century Athenæum look like?

A major competition for reuse has just been announced for the Malagrotta Landfill, one of the European Union's biggest landfill sites. After Malagrotta was closed in August 2013 due to its controversial size and negative impact on the surrounding community, the Municipality of Rome began a process of redevelopment through community engagement. Multi-displinary teams are tasked with a creating a proposal to reinvent the sprawling 240-hectare property while considering its original purpose. The competition is designed to begin a conversation on the long-term vision for the property.

Is it possible to build low cost homes in the city that are both sustainable and easy on the eyes? Self Build on a Shoestring in the City, organized by the National Custom & Self Build Association and Grand Designs Live, is an ideas competition in its second year that seeks to answer this question by showcasing innovative designs for a group self build project in an urban location. More details after the break.

The 40th Annual Ken Roberts Memorial Delineation Competition, the longest running architectural drawing competition, is now accepting submissions. Entries can be conceptual or final elevations, sections, perspectives, or renderings and may be produced digitally or by hand – or a combination of both.