Multiplex: Medium


A detached (2 to 2.5-story) structure that consists of 5 to 12 dwelling units arranged side-by-side and/or stacked, typically with a shared entry from the street. This type has the appearance of a medium-to-large single-unit house and does not include a rear yard.

Typical Specifications

Lot Front-loaded Alley-Loaded
Width* 95–120 feet 75–100 feet
Depth* 100–150 feet 100–150 feet
Area* 9,500–18,000 sq. ft. 7,500–15,000 sq. ft.
  0.22–0.41 acres 0.17–0.34 acres
Number of Units 5–12 units 5–12 units
Typical Unit Size 500–1,200 sq. ft. 500–1,200 sq. ft.
Net Density 12–55 du/acre 14–70 du/acre
Gross Density 10–50 du/acre 12–63 du/acre
Parking Ratio* 1-1.5 per unit 1-1.5 per unit
On-street Spaces 3–4 3–5
Off-street Spaces 1.25 per unit max. 1.25 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 50–80 feet
Depth 35–75 feet
Height (to eave)* 25–40 feet
Floors 2-2.5 stories
* Varies based on context

Idealized specifications take the best characteristics of this type and update them for today’s typical building standards, serving as a model for new development.

Alley Loaded

Ideal Specifications

Width 95 feet
Depth 115 feet
Area 10,925 sq. ft.
  0.251 acres
Number of Units 12 units
Typical Unit Size 765 sq. ft
Net Density 48 du/acre
Gross Density 35 du/acre
Parking Ratio 1.08 per unit
On-street Spaces 4
Off-street Spaces 9
Front 15 feet
Side 5 feet
Width 75 feet
Depth 65 feet
Height (to eave) 28 feet
Floors 2.5 stories