July 2026 · 4 min read
Reviving a site with an ageing or spent consent
A planning consent is an asset with a shelf life. Markets move, policy moves, and build costs move, and a permission that made sense when it was granted can quietly become the thing holding a site back. Recognising that early, and knowing the routes to put it right, is often what separates a site that can be revived from one that keeps drifting.
When a consent becomes a liability
A consent can be running down its time limit, partly implemented in a way that constrains what follows, or simply built around a use, mix or specification the market no longer wants. Any of these can leave a technically consented site that is not, in practice, deliverable at a value that works.
The mistake is to treat the existing permission as fixed. It is usually the most valuable card the site holds, but only if it is used, amended or replaced deliberately rather than defended out of habit.
The routes to re-consent
A section 73 amendment can vary the conditions of an existing permission where the changes are not fundamental, keeping the benefit of the original consent while updating it. Reserved matters can carry an outline permission through to a deliverable detailed scheme. Where the change is more significant, a fresh application built around a better-fitting strategy may be the cleaner route.
Each carries different risk, timescale and cost, and the right choice depends on the state of the existing consent and how far the strategy needs to move. This is a judgement rather than a formula, and getting it right at the outset saves months later.
Amend, or start again
The deciding question is how far the deliverable scheme needs to move from the consented one. Where the gap is small, an amendment protects both value and time. Where it is large, trying to stretch an old consent to fit a new plan can cost more than it saves.
On one scheme our team has led, an ageing consent on a stalled 197-home site was reworked through a section 73 amendment and then reserved matters to unlock an entirely repositioned scheme. The consent was not the obstacle; treating it as unchangeable would have been.