Transit vs Brownfield
A 300-employee insurance company is choosing between two sites. Site A is a greenfield parcel in a suburb, 0.4 mi from a highway interchange, with 300 surface parking spaces and no fixed-route transit within 1 mi. Site B is a 1.2-acre former dry-cleaning property in the city, 0.5 mi from a light-rail station with frequent service, and has an existing 120-space parking structure. Site B requires environmental cleanup of chlorinated solvents, which may add six months and $2 million. The company's lease expires in 30 months.
1. Which site is stronger for LEED Location and Transportation credits, and what must be verified?
Read the worked answer
Site B is the stronger LT candidate on its face because it offers transit proximity, an urban location with likely density and diverse uses, and a parking structure that may support a reduced-parking strategy. A documented contaminated property can also qualify as a high-priority site, which helps under Sustainable Sites and reinforces the location decision.
But the team must verify, not assume:
- The actual walking route and distance to the light-rail station, and whether service frequency meets the rating system's transit criteria.
- Whether the dry-cleaning contamination is documented in a way the credit requires.
- Whether the parking structure's 120 spaces are actually below the applicable baseline for 300 employees.
- Whether cleanup liability and schedule fit the lease expiration.
Site A likely fails transit and reduced parking, and a greenfield site may create habitat and stormwater problems. The judgment is to compare verified LT value against business risk.
2. How should the 120-space parking structure be treated?
Read the worked answer
Do not treat any parking as automatically good. The LT parking credit rewards reducing parking supply and discouraging single-occupancy driving, not merely hiding cars in a structure.
For Site B, the team should:
- Calculate the baseline parking supply for the occupancy and location.
- Compare 120 spaces against that baseline, not against Site A's 300 spaces.
- Consider shared parking with nearby uses, unbundled parking, transit passes, and preferred carpool/vanpool spaces.
- Check whether the structure can support bicycle storage, showers, and green vehicles.
If 120 spaces is still generous for 300 employees near frequent rail, the project may need transportation demand management rather than more parking. If it is already constrained, the structure may help the credit case and reduce site imperviousness.
3. How should schedule and cleanup risk affect the decision?
Read the worked answer
LEED credits do not override business risk. The team should separate the credit case from the delivery case:
- Confirm the cleanup scope, regulatory closure path, and likely schedule with an environmental consultant.
- Price environmental insurance, escrow, or contract contingencies into Site B.
- Phase remediation so construction can begin in uncontaminated areas if regulators allow.
- Have a temporary lease or swing space as a schedule fallback.
If cleanup slips, Site B may still be the better long-term location, but the owner must decide whether the LT advantage is worth six months and $2 million. If the contamination cannot be documented for the high-priority-site credit, Site B's LEED advantage narrows. The defensible answer is a risk-adjusted comparison, not a raw credit count.