Mayor Bill de Blasio's administration said Wednesday that four charter schools could have space in public school buildings to expand, in the first real test of a new state law that preserves the right of charters to keep sharing city schools.

Two of the locations, which have yet to be chosen, will go to Eva Moskowitz's Success network. The mayor clashed with Moskowitz earlier this year when he blocked three of her charters from opening in city buildings; the city then wound up paying for her to use Catholic school buildings instead. Moskowitz said the two schools in question would outgrow their current homes by the 2015-16 school year.

"We're encouraged that the administration wants to work with public charter schools and make sure parents have great options for their children, regardless of zip code," Moskowitz said in an emailed statement. " We look forward to getting more details."

Under the law, a charter school can file an appeal if it believes the city's choice of location doesn't conform with its educational mission. The city is not obligated to find space for a charter, though.

The Department of Education rejected an application for Global Community Charter School in Washington Heights, on the grounds that no space was available in any schools in its district. The school currently rents space. Under the state's new law, this means the city will have to pay for the school to add extra grades in that same location or in another private space.

A Department of Education spokeswoman said the agency has been in communication with the school.

"It's our goal to invest in all our public schools to make sure parents have great options for their children, regardless of what neighborhood they live in," Chancellor Carmen Fariña said in a statement. "It doesn't matter whether a child attends a traditional public school or a charter. We want every child to get the education they need to succeed and are committed to complying with the space law."

The Department has not revealed how many other charter schools have applied the city for public space. Approximately 120 charters have space in city schools and another 80 or so rent their locations. 

Michael Regnier, director of policy and research at the New York City Charter School Center, praised the de Blasio administration.

"It should be a positive signal to schools going forward that the administration understands that the law provides facility support to charter schools in a way that we have never had before in New York," he said.

The schools that will get city space are:

• Bronx Charter School for Better Learning II, a new school opening in 2015-2016.
• Launch Expeditionary Learning Charter School in Brooklyn, adding high school grades in 2015-2016.
• Success Academy Bed Stuy 2 Middle School, adding 5th grade in 2015-2016. The network also wants to expand another Bed Stuy elementary school in 2016 but has yet to hear back from the city about that request for space.
• Success Academy Bronx 3, adding 3rd grade in 2015-2016.