NPPF Paragraph 208 , The Public-Benefit Balancing Test
Paragraph 208 of the December 2024 NPPF reads: 'Where a development proposal will lead to less than substantial harm to the significance of a designated heritage asset, this harm should be weighed against the public benefits of the proposal including, where appropriate, securing its optimum viable use.' This is the everyday paragraph for the vast majority of UK HIA work , most listed-building cases fall on the less-than-substantial side of the spectrum.
How the balance is actually applied
It is a planning judgement, not a mathematical formula. The LPA weighs the identified harm (located on the less-than-substantial spectrum) against the public benefits. Per Forge Field and Mordue v SoSCLG [2015] EWCA Civ 1243, the harm carries 'considerable importance and weight' on one side of the scale , public benefits must be commensurate, not merely present.
Public benefit examples that have succeeded
- Funding of repair to other parts of the asset through enabling development.
- Reinstatement of historically-correct features lost in the 20th century.
- Renewable-energy contribution (PV, ASHP) where carefully sited.
- Securing residential use of a building at risk of dereliction.
- Public access where none previously existed.
How paragraph 208 interacts with paragraph 200
Paragraph 200 governs the input duty (describe significance, proportionate detail). Paragraph 207 (substantial harm) and paragraph 208 (less-than-substantial harm) govern the output test once the LPA has reached a harm finding. An HIA must address both , the significance description satisfies paragraph 200; the impact evaluation locates the case in paragraph 207 or 208.