US Citizenship and Immigration Services (USCIS) is set to spend about $38.3 billion to buy and convert warehouses into immigration detention centers nationwide. Documents sent to New Hampshire's governor reveal plans for 16 regional processing centers and eight large detention facilities. Each regional center will hold 1,000 to 1,500 detainees for three to seven days. The larger centers will hold 7,000 to 10,000 people for roughly 60 days before deportation. According to the documents, Immigration and Customs Enforcement (ICE) aims to increase detention space due to more arrests and hires. One facility in Merrimack, New Hampshire, is estimated to cost $158 million for retrofitting and $146 million to run in the first three years. The Department of Homeland Security hopes to complete the new detention model by the end of fiscal year 2026 using funds from the One Big Beautiful Bill Act. This approach shifts detainees to large, centralized sites instead of moving them around based on open beds. Governor Kelly Ayotte of New Hampshire said she received the documents only recently, while ICE’s acting director claimed earlier talks had already happened. Massachusetts Governor Maura Healey strongly opposed the Merrimack detention center, calling it “outrageous” and criticizing ICE for harsh tactics. Healey said, “ICE is shooting people dead on the street. Mothers have been ripped from cars and separated from children... We should be opposing ICE’s tactics, not allowing them to expand.” The plans highlight a major shift in US immigration detention policy amid debates over safety and human rights.