Cluster developments are a permitted use in which density regulations are determined for an entire specified area instead of a lot-by-lot basis, allowing more smaller units to be constructed in the area. Cluster development allows the developer greater flexibility in designing projects but preserves the overall density in an area. This can naturally encourage the construction of low-cost and therefore more affordable housing units. Municipalities can also require affordable housing to be developed as a condition of approval for adjusting density requirements.
PUDs are municipal regulations that allow developers exemptions from certain zoning requirements in exchange for developing properties with desirable criteria. Some municipalities include PUDs within overlay districts. By allowing greater flexibility in the configuration of buildings on a site or allowing mixed usage of a site, a municipality can encourage more creative and efficient use of a space than is typically allowed in local zoning laws. It can also result in lower infrastructure costs and better coordination of development across an area.
Zoning bylaws that require unnecessarily large unit sizes can prevent developers from building smaller, more affordable housing units. Municipalities can adjust zoning requirements to allow for studios, or micro-units or compact units in some instances.
Zoning bylaws that require large minimum lot sizes (≥2 acres per dwelling unit) require developers to purchase more land for each unit and these costs are ultimately passed on to homebuyers or renters. Towns can promote the development of new affordable housing by changing their zoning bylaws so that less land is required for each lot.
