As apartments, manor houses, accessory dwelling units, laneway housing, and secondary suites continue to play their part in increasing suburban housing supply, they do so entwined in the debate around neighbourhood fit. Meanwhile, many low-rise neighbourhoods remain exempt from densification increases on the assumption that the detached single-family home should remain the prevailing form. Such neighbourhoods may allow minor infill if it can work within the format of the detached home, or better yet, if it can be done without being noticed at all, but meaningful change in housing supply will remain limited. Within this mix of housing action and inaction, bluefield housing is offered as a supplement to existing medium density ‘missing middle’ strategies, which are discussed in Chapter 1 (Figure 0.2). Where missing middle housing may struggle to find traction in some older neighbourhoods, bluefield housing emphasises the retention and retrofitting of existing suburban housing and landscape because – in the first instance – this retention just makes sense. In simple terms, the bluefield housing model is a natural re-purposing of the established methods of altering and adding to the single-family house form, but for the supply of add-itional dwellings.