4.2 Site Assessment and Site Development

Once the Construction Activity prerequisite is locked in, the SS category rewards teams for knowing the site before they design and then acting on that knowledge. Sections 4.2 covers the first two SS credits: Site Assessment and Site Development — Protect or Restore Habitat.

SS Credit: Site Assessment (1 point)

Intent

To assess site conditions before design to evaluate sustainable options and inform related decisions about site design. In plain language: don't draw the building first and then discover the wetland.

What the Assessment Must Cover

LEED requires the team to assess and document seven categories of site conditions. Each must include findings, an interpretation, and how the design responds to them. A line-item table without a design-response column will not earn the point.

Timing Requirement

The assessment must be performed during the predesign or schematic design phase and must measurably influence the project. Documenting a wetland and then paving it does not satisfy the credit.

Documentation

• Site assessment narrative
• Annotated site plan or GIS overlay
• Statement of how each category influenced the design

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SS Credit: Site Development — Protect or Restore Habitat (1–2 points)

This credit shifts focus from understanding the site to taking action on it. The intent is to conserve existing natural areas and restore damaged areas to provide habitat and promote biodiversity.

Option 1: On-Site Restoration

Use native or adapted plants — species that occur naturally in the region or are well-suited without irrigation — to restore site area damaged by previous development or to retain undisturbed habitat. The percentage threshold depends on whether the site is greenfield or previously developed.

The phrase "vegetated and non-roof area" in older references applies to projects where the building footprint is excluded from the calculation; the v4 standard uses total site area including the footprint for previously developed sites. Always confirm against the latest LEED v4.1 reference guide.

What Counts as "Native or Adapted"?

• Native plants — species that occur naturally in the region (state plant atlas or regional native plant society lists)
• Adapted plants — non-invasive species that perform well in the local climate with minimal supplemental water, fertilizer, or pest control after establishment
• Invasive species are explicitly excluded and may not be counted

Vegetated Roofs

A vegetated (green) roof may count toward Option 1 only when planted with native or adapted vegetation. If the green roof is needed to meet this credit, it must also be designed to support habitat — a thin sedum mat with no biodiversity value typically does not qualify on its own.

Option 2: Financial Support

Projects that cannot meet Option 1 on the site itself may provide financial support of at least $0.40 per square foot of total site area to a nationally or locally recognized land trust or conservation organization. Conditions:

• The land trust must be accredited by the Land Trust Accreditation Commission or a recognized equivalent
• The conserved land must lie within the same EPA Level III Ecoregion as the project
• A signed letter of intent and proof of payment are required
• This option earns 1 point — it does not stack to 2 points by itself

Calculation Example

A 50,000 sq ft total-site-area project pursuing Option 2 must contribute:

50,000 × $0.40 = $20,000 to a qualifying land trust.

Common Exam Traps

• Site Assessment is 1 point, not a prerequisite. Many candidates confuse it with the prerequisite — it is not.
• The assessment must influence design, not just describe the site.
• Site Development — Protect or Restore Habitat is worth up to 2 points; Option 2 alone caps at 1 point.
• Financial support is calculated on total site area at $0.40/sq ft, not on building floor area.
• Turfgrass lawn is rarely native or adapted in most regions and typically does not count toward the restoration percentage.