On March 14, 2006 the NYC Landmarks Preservation Commission unanimously approved Platt Byard Dovell White's contemporary addition to Poly's Romanesque Revival Hulbert mansion in the Park Slope Historic District. The new glass and limestone structure complements the existing mansion and introduces a modern idiom to the architecture of the neighborhood. The addition houses eight new classrooms, a skylit dance studio and a gymnasium. The renovated mansion accommodates six expanded classrooms, a new dining room, expanded library, music room and administrative offices. A new entrance and playground area are also included, providing gathering and play space off the public street.

1. first LEED certified school in New York City
   
2. first LEED certified primary school in the entire state of New York
   
3. 34 LEED points awarded / 35 points submitted
   
4. 31% reduction in potable water use: dual-flush and ultra-low-flow lavatories
   
5. green power contract for 2 years at 70% of the power demand
   
6. demand control ventilation in high activity spaces (gymnasium and dance studio)
   
7. 91.6% existing building reuse: structural
   
8. 83.4% (308.4 tons) construction waste diverted from landfill
   
9. 22.5% recycled content in building materials
   
10. 41% regional material extraction and manufacture (within 500 miles of site)
    
11. 7.9% rapidly renewable materials, specifically bamboo
    
12. 100% low-VOC adhesives, sealants, paints, coatings and carpet systems
    
13. landscape design minimizes heat island effect (shade + high-SRI materials)
    
14. 78% of regularly occupied rooms have the LEED-required daylight
    
15. 100% of classrooms have the LEED-required daylight
    
16. 95.78% of regularly occupied rooms have direct views to the exterior