The proposed Policy requires 40% affordable housing for all residential development proposals of 10 or more homes district wide. However, the supporting 2016 Viability study states that within the Lutterworth, Market Harborough and Blaby border areas, the viability threshold for affordable homes is 30%.

Table 3.7 within the Viability study supports the adopted Core Strategy Policy CS3 stating "A minimum of 40% of the total number of dwellings will be affordable within the two highest value sub-market areas of Harborough Rural South West and Harborough Rural North and Central. In the remaining three sub-market areas (i.e. Lutterworth, Market Harborough and Blaby Border Settlements), a minimum of 30% of the total number of dwellings will be affordable." The study offers no evidence to suggest a change in this current position.

The NPPF paragraph 173 states that "careful attention should be paid to viability and costs in plan-making" and that "the scale of development identified in the Plan should not be subject to such scale of obligations and policy burdens that their ability to be developed viably is threatened". Therefore, in order for the Policy to be considered consistent with national policy it must be altered to accommodate the affordable homes' viability variations noted across the district.