Can an affordable housing financial contribution help secure planning permission for a development of just seven homes? A recent appeal decision in East Hertfordshire demonstrates how it can.
A Planning Inspectorate appeal decision dated 12 October 2026 has highlighted the importance of affordable housing contributions, brownfield land classification and the weight these factors can carry when determining residential planning applications.
The appeal concerned Robins Nest Farm, Little Berkhamsted, Hertfordshire (APP/J1915/W/25/3376568), where permission was sought for the demolition of existing buildings and construction of seven residential dwellings.
The application had been refused by East Herts DC for a number of reasons including the non-delivery of an affordable housing contribution of £1,565,000.
S106 Management (instructed at the appeal submission stage) provided a Appeal Viability Statement suggesting a viable contribution of £78,458.
Negotiations with the LPA in the course of the appeal led to an appeal Unilateral Undertakig offering Contribution A (£305,316) on the basis that the site was Brownfield and Contribution B (£610,632) on the basis that the site was Green Field, leaving the inspector to decide which was appropriate.
Despite concerns regarding the site's accessibility and its conflict with the Council's spatial development strategy, the appeal was allowed on the basis of UU Contribution A.
This illustrates the usefulness of filing a full viability appeal statement, engaging in viability negotiations with the LPA as the appeal progresses (who were very helpful in this case) and the use of alternate multiple value affordable housing contribution (with blue pencil clause) to minimise risk in a planning appeal. This is a sophisticated approach that yielded a clear dividend in this case saving the client some £1.25m.
A particularly interesting aspect of the decision was the Inspector's approach to affordable housing.
Affordable Housing Requirements for Smaller Developments
Under Policy HOU3 of the East Hertfordshire District Plan, residential developments with a combined gross floorspace exceeding 1,000 sq m are expected to provide affordable housing of up to 35%.
This is significant because affordable housing requirements are often associated with larger residential developments of 10 or more dwellings.
However, in this instance, the proposed seven dwellings triggered the Council's affordable housing policy because of their combined floorspace.
The Council and appellant agreed that providing affordable housing on-site would not be appropriate and that a financial contribution towards affordable housing elsewhere would be acceptable.
The Inspector accepted this approach.
This demonstrates why developers should not assume that schemes comprising fewer than 10 dwellings are automatically exempt from affordable housing obligations.
Brownfield Land Classification: A Key Consideration
One of the most interesting elements of the appeal concerned the calculation of the affordable housing contribution.
The site was located within the Metropolitan Green Belt but was recognised as previously developed land. The Inspector concluded that the proposed redevelopment would not cause significant harm to Green Belt openness and would therefore not constitute inappropriate development. This finding was important when determining the appropriate affordable housing contribution. The Inspector confirmed that the contribution should be calculated using the brownfield methodology, identified as Affordable Housing Contribution A, within the submitted planning obligation.
Although the parties had agreed the relevant contribution amount, the Inspector's findings established the appropriate basis for its calculation.
For developers and landowners, this highlights the importance of understanding how a site's planning classification can influence its affordable housing obligations and overall development viability.
Affordable Housing Given Substantial Weight in the Planning Balance
Perhaps the most significant aspect of the decision was the weight the Inspector attached to the affordable housing contribution.
Although the Inspector found that the development conflicted with the Council's spatial strategy due to its reliance on private car travel, this harm was afforded limited weight.
Conversely, the delivery of six additional dwellings was given substantial weight.
Importantly, the Inspector also stated:
"I also attach substantial weight to the financial contribution towards the delivery of affordable housing"
This is a noteworthy conclusion.
Rather than treating the affordable housing contribution solely as a planning obligation, the Inspector expressly recognised it as a substantial benefit supporting the proposed development. When considered alongside the additional housing delivery and relevant national planning policies, the benefits of the scheme were found not to be substantially outweighed by its adverse effects.
Consequently, planning permission was granted.
What Does This Mean for Developers and Landowners?
This appeal provides several useful considerations for those assessing residential development opportunities.
1. Smaller developments can still trigger affordable housing obligations.
The number of dwellings is not always the determining factor. Local planning policies may also apply floorspace thresholds, making it essential to assess affordable housing requirements at the earliest stage.
2. Brownfield classification can influence financial contributions.
The Inspector's decision to apply the brownfield contribution methodology demonstrates the importance of establishing the correct planning status of a development site.
3. Affordable housing contributions can support the planning balance.
Where secured through an appropriate planning obligation, a financial contribution towards affordable housing may be recognised as a positive planning benefit and, as demonstrated in this case, can attract substantial weight.
4. Early viability assessments remain essential.
Affordable housing contributions can affect residual land values and the financial feasibility of residential schemes. Understanding these obligations before acquiring land or progressing an application can help developers make more informed decisions.
Conclusion
The Robins Nest Farm appeal is an interesting example of how affordable housing policy can influence the outcome of smaller residential development proposals.
The decision demonstrates that financial contributions towards affordable housing can be acceptable in place of on-site provision where justified and can carry substantial positive weight in the planning balance. It also reinforces the importance of brownfield land classification and understanding the affordable housing requirements applicable to individual development sites.
For developers and landowners, the message is clear: affordable housing obligations should not simply be viewed as an additional development cost, but as an important consideration within the wider planning strategy.
While every planning application must be assessed on its individual merits, this decision provides a useful reference for those considering residential redevelopment opportunities, particularly on previously developed land.
Appeal Reference: APP/J1915/W/25/3376568
Location: Robins Nest Farm, Little Berkhamsted, Hertfordshire
Decision Date: 12 October 2026
Outcome: Appeal Allowed
