If I renovate several two-family units, are the units defined as a facility?

A residential building with four or fewer dwelling units is not considered a facility unless it is part of a larger installation. Examples of what may be considered part of a larger installation include, but are not limited to:

An army base;

Company housing;

Apartment or housing complex;

Homes which are demolished as part of an urban renewal project, a highway

An apartment which is an integral part of a commercial facility.