TheLEED for Homes Rating System (v4)includes theLocation and Transportation (LT) Credit: Compact Development, which awards points for higher-density development to reduce environmental impacts and promote efficient land use.

According to theLEED Reference Guide for Homes Design and Construction (v4):

LT Credit: Compact Development (1–3 points)

Achieve the following dwelling unit densities (units per acre of buildable land):

1 point: ≥ 7 units per acre.

2 points: ≥ 12 units per acre.

3 points: ≥ 20 units per acre.Calculate density by dividing the number of dwelling units by the buildable land area (in acres).Source: LEED Reference Guide for Homes Design and Construction, v4, Location and Transportation Credit: Compact Development, p. 57.

TheLEED v4.1 Residential BD+Crating system confirms:

LT Credit: Compact Development

For single-family homes, achieve 3 points by developing at least 20 dwelling units per acre on buildable land.

Source: LEED v4.1 Residential BD+C, Credit Library, accessed via USGBC LEED Online.

Calculation:

Site area: 2 acres (0.8 hectare).

Number of homes: 40 single-family homes.

Density: 40 units ÷ 2 acres =20 units per acre.

This meets the threshold for3 points(≥ 20 units per acre).

The correct answer isthree points(Option D), as the density of 20 units per acre qualifies for the maximum points under the credit.

Why not the other options?

A. Zero points: The density (20 units/acre) far exceeds the minimum threshold (7 units/acre).

B. One point: This applies to ≥ 7 units/acre, below the project’s density.