For a rowhouse, what is the minimum lot frontage defined under the IRR of BP 220?

The minimum lot frontage for a rowhouse, as defined under the Implementing Rules and Regulations (IRR) of BP 220, is indeed 3.5 meters. This regulation is established to ensure that each dwelling unit has an adequate amount of space for accessibility and utility connections, as well as to maintain a uniformity in the design and spacing of buildings within a rowhouse structure. A lot frontage of 3.5 meters allows for necessary considerations like ingress and egress, which are crucial for safety and functionality. This standard facilitates a balance between density and livability in residential developments, particularly in urban settings where space is often limited.