Sep 14, 2026 · 21 min · 10 segments
A new National Planning Policy Framework was published on 17 August 2026. It is 130 pages, it is the first full rewrite since 2012, and — this is the part that changes what you do this week — its…
Yeah, let's start with the literal definition of the projects these developers build, because we now have a brand new legally recognized category, right? The medium development here.
Right, exactly.
So for decades, the system has stubbornly operated on this binary.
You were either doing a minor development, so think a single house or an extension, or you were doing a major development.
Well, nothing in between.
Right, nothing in between.
But this new tier explicitly carves out a middle ground.
It's for housing developments of 10 to 49 dwellings, inclusive, on sites that do not exceed 2.5 hectares.
Which is, I mean, that is the absolute bread and butter size for an SME developer.
It really is.
But if we look closely at the legal wording, these medium sites are still technically classified under the major development umbrella.
So what does this new tier actually do for them in practice?
Well, it introduces a mandatory proportionate approach.
Mechanically, this changes the validation list.
Okay, and the validation list is essentially the toll gate at the front of the planning system.
Yeah, exactly.
It is the physical checklist of expensive, time-consuming surveys and reports you have to submit before the council will even open your envelope to look at your design.
So under the old rules, a developer trying to build, say, 20 homes on a vacant lot might be forced to provide the exact same exhaustive traffic models, environmental impact studies, shadow analyses as a corporate giant building a 500-home sprawling neighborhood.
Exactly.
It was wildly unbalanced.
But the new framework legally requires local authorities to explicitly distinguish their validation lists between major, medium, and other development.
So the checklist shrinks.
OK, let's unpack this.
It sounds like these SME developers basically just got bumped up to premium economy, like they aren't flying first class with the massive developers, but they do get to skip the heavy paperwork line.
That's a great way to look at it.
Yeah, let's start with the literal definition of the projects these developers build, because we now have a brand new legally recognized category, right? The medium development here.
Right, exactly.
So for decades, the system has stubbornly operated on this binary.
You were either doing a minor development, so think a single house or an extension, or you were doing a major development.
Well, nothing in between.
Right, nothing in between.
But this new tier explicitly carves out a middle ground.
It's for housing developments of 10 to 49 dwellings, inclusive, on sites that do not exceed 2.5 hectares.
Which is, I mean, that is the absolute bread and butter size for an SME developer.
It really is.
But if we look closely at the legal wording, these medium sites are still technically classified under the major development umbrella.
So what does this new tier actually do for them in practice?
Well, it introduces a mandatory proportionate approach.
Mechanically, this changes the validation list.
Okay, and the validation list is essentially the toll gate at the front of the planning system.
Yeah, exactly.
It is the physical checklist of expensive, time-consuming surveys and reports you have to submit before the council will even open your envelope to look at your design.
So under the old rules, a developer trying to build, say, 20 homes on a vacant lot might be forced to provide the exact same exhaustive traffic models, environmental impact studies, shadow analyses as a corporate giant building a 500-home sprawling neighborhood.
Exactly.
It was wildly unbalanced.
But the new framework legally requires local authorities to explicitly distinguish their validation lists between major, medium, and other development.
So the checklist shrinks.
OK, let's unpack this.
It sounds like these SME developers basically just got bumped up to premium economy, like they aren't flying first class with the massive developers, but they do get to skip the heavy paperwork line.
That's a great way to look at it.
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