Planning And Infrastructure Act 2025 In England – Update On Implementation

The Planning and Infrastructure Act 2025 (PIA) has set out an ambitious range of planning reforms, and 18 February 2026 marked a significant step with many provisions of the the PIA now formally in force. However, not all are fully "in effect". This post highlights those changes in force, and sets out those prospective changes that await further implementation. 

In force and in effect

Extension of implementation periods on judicial review

Where a planning permission is subject to legal challenge, section 56 of the PIA extends the time for implementing a planning permission (or listed building consent). If permission is granted for judicial review, the time frame for implementation will be extended by one year in the case of High Court proceedings, an additional year if the case goes to the Court of Appeal, and a further two years if the case goes to the Supreme Court (so, up to four years in total, but only three if the case goes straight from the High Court to the Supreme