Duplex: Side-by-Side


A small- to medium-sized structure that consists of two dwelling units, one next to the other, both of which face and are entered from the street.

Typical Specifications

Lot Front-loaded Rear-Loaded
Width* 55–75 feet 40–70 feet
Depth* 100–150 feet 100–150 feet
Area* 5,000–11,250 sq. ft. 4,500–10,500 sq. ft.
  0.11–0.26 acres 0.10–0.24 acres
Number of Units 2 units 2 units
Typical Unit Size 600–2,400 sq. ft. 600–2,400 sq. ft.
Net Density 8–17 du/acre 8–19 du/acre
Gross Density 6–13 du/acre 7–14 du/acre
Parking Ratio*
On-street Spaces 2–3 2–3
Off-street Spaces 1 per unit max. 1 per unit max.
Front* 10–25 feet
Side* 5–12 feet
Rear (main building)* 30–60 feet
Between Main and Accessory Buildings 10–20 feet
Building Size
Width 28–55 feet
Depth 28–60 feet
Height (to eave)* 20–24 feet
* Varies based on context
All Types