The last state funeral occurred 11 years ago, when Gerald Ford, the 38th president, was laid in state at the Capitol in 2007.
Members of Congress will pay their respects in a bicameral arrival ceremony starting on Tuesday. Then the general public will be allowed to do the same.
A spokesman for the Bush family, Jim McGrath, said on Twitter that funeral information would be posted on a website established to pay tribute to the 41st president, www.georgehwbush.com. Bush died yesterday.
By tradition, presidential families are able to personalise the event in many ways, choosing the sequence and location of observances, which can include a full military parade along Constitution Avenue and other details such as a horse-drawn caisson to transport a late president's casket from Washington National Cathedral to lie in state at the US Capitol.
President Donald Trump is declaring Thursday a national day of mourning and ordering flags on all public buildings to be lowered to half-staff for the next 30 days.
Preparations began in Bush's home state of Texas, where his children had gathered - including former President George W. Bush, and former Florida Governor Jeb Bush.
Bush's remains are expected to be flown from Texas to Andrews Air Force Base in Maryland. US Capitol Police, DC police, the National Park Service and other local authorities reported that they were on standby as they awaited direction from the military about their roles in the ceremonies and how the events may impact the region.