Google DeepMind expands PlanAssist AI planning tool to 12 more English councils in 12-month beta, after pilot showed 58% cut in householder assessment time

Google DeepMind has moved PlanAssist, a Gemini-based tool for handling householder planning applications, from a pilot in Barnet, Camden and Dorset (running since June) into a 12-month Beta on live applications. Twelve more English planning authorities will join in three cohorts, making 15 in total. The government says it plans to offer the tool to all English councils in 2027, subject to testing. Officers keep the final decision on every application. The source is DeepMind's own blog post, and no outside evaluation is linked.

Householder applications are said to make up as much as 70% of planning officers' workloads, so a tool that really speeds them up would matter to councils, applicants and anyone waiting on housing delivery. This is one of the more concrete moves of AI into a UK public service, because it is live use with named councils rather than a demo. The impact is still limited for now: 15 councils out of several hundred, one application type, and a Beta that is meant to test whether the pilot results hold. The real decisions it enables are for other councils, who will be weighing procurement and staffing against evidence that does not yet exist outside the vendor.

The 58% cut in assessment time and the 70% of reports approved without edits come only from DeepMind, with no independent check, and "approved without edits" may reflect busy officers trusting a draft rather than the draft being right. The link to the 1.5 million homes target is promotional framing, since householder extensions and alterations do not add many new homes. The 2027 national rollout is a conditional plan, not a commitment.

1. 01Independent evaluation of the Beta, such as a government or council audit that reports processing times, error rates and appeal or complaint numbers, rather than DeepMind's own figures.
2. 02Whether the three cohorts of 12 councils actually onboard on schedule, and whether any pilot councils (Barnet, Camden, Dorset) publicly report their own results or pull back.
3. 03Whether the government confirms the 2027 all-council offer, including pricing, procurement route and whether councils must use Google Cloud, plus any planning-officer union or professional-body response on workload and accountability.