A fourplex is a medium-size Missing Middle housing type that consists of four units: typically two on the ground floor and two above with a shared entry.

Fourplex

Description

A medium structure that consists of four units: typically two on the ground floor and two above with a shared entry.

Typical Specifications

Lot Front-loaded Rear-Loaded
Width* 60–75 feet 50–65 feet
Depth* 100–150 feet 100–150 feet
Area* 6,000–11,250 sq. ft. 5,000–9,750 sq. ft.
  0.14–0.26 acres 0.11–0.22 acres
Units
Number of Units 4 4
Typical Unit Size 500–1,200 sq. ft. 500–1,200 sq. ft.
Density
Net Density 15–29 du/acre 18–35 du/acre
Gross Density 13–22 du/acre 14–25 du/acre
Parking
Parking Ratio*
On-street Spaces 2–3 2–3
Off-street Spaces 1.5 per unit max. 1.5 per unit max.
Setbacks
Front* 10–25 feet
Side* 5–12 feet
Rear (main building)* 30–60 feet
Between Main and Accessory Buildings 10–20 feet
Building
Building Size
Width 36–56 feet
Depth 32–60 feet
Height (to eave)* 20–24 feet
* Varies based on context