OTTAWA — Preparation of a temporary new home for the Supreme Court of Canada is three years behind schedule due to a series of unforeseen challenges.

At the same time, officials say there are no firm dates for beginning — or wrapping up — badly needed renovations to the top court’s stately permanent building on Ottawa’s Wellington Street.

A thorough revamp of the Supreme Court building had originally been set to take place between 2023 and 2028.