While smaller than a similar unit that opened in Basildon in 2023, each centre will have specialist mental health staff on site.
Feedback from patients suggested these types of treatment centres were having a “huge” impact, according to EPUT.
Tom Abell, chief executive of the NHS Essex Integrated Care Board cluster, said demand for mental health crisis care was rising.
“These units will make a real difference by ensuring people across Essex can access timely, specialist support in calm, therapeutic spaces,” he added.
EPUT provides services to more than 100,000 patients at any one time.
The deaths of more than 2,000 people, who were being cared for by EPUT and the North East London NHS Foundation Trust, are being examined at the Lampard Inquiry.
It aims to understand what happened to patients who died at inpatient units between 2000 and the end of 2023.