As the flagship project for the next downtown Boston neighborhood slated for growth, Atlantic Wharf will be the city of Boston’s first LEED Gold mixed-use development. CBT Architects presents a case study on this new one million square foot project that includes approximately 65 residential units, ground-level retail and public spaces, six stories of below-grade parking, and 31 floors of office space that will bring urban activity directly to the Fort Point Channel water’s edge. The new sustainable development is at the base of a series of restored and renovated historic structures that preserve the texture and streetscape of this site, integrated with a modern highrise glass tower. By preserving the south and east façades of the historic warehouses, using a very energy-efficient curtainwall, and employing green roof technologies, Atlantic Wharf will be the a centerpiece of Boston's green development.

1. Atlantic Wharf Sustainable Case Study Boston Properties Owner Vanderweil EngineersSustainability Consultant

3. Proximity to down town and major transportation nodes

4. Waterfront activation required by Chapter 91 permittingUrban Design

6. Historic Approvals – Article 85, MHC, BLC

11. Hybrid Concrete Core and Steel Frame Tower

13. Sustainable Site Highlights Sustainable Sites – 12 Points Achieved

16. Atlantic Wharf Reduces the amount of process water used by 15% as compared to a typical building.

17. Typical Building Process Water Use: 6.98 gal/sf/year

22. The combination of low-flow fixtures, stormwater re-use, and reducing irrigation water use by resulted in Atlantic Wharf reduced the domestic water use by 69% as compared to a typical downtown office tower.

23. Typical tower domestic water use: 18 gal/sf/yeaf

26. Atlantic Wharf is designed to use 42% less energy overall than comparable New England office buildings

27. New England Office Building Energy Use: 114.6 MBTU/sf/year (CBECS 2003)

30. Major core systems and public spaces metered

31. Infrastructure installed for tenants to meter their own spaces

33. ASHRAE 90.1 2004 Glazing: .057 U-value

34. Atlantic Wharf Glazing: .033 U-value

35. Atlantic Wharf achieved at 32% increase in roof thermal properties that contribute to reducing the building heating and cooling load.

36. ASHRAE 90.1 2004 Roof: .063 U-value

46. Temporary Steel Facade support required while existing GA/Tufts building demolition took place

47. Structural slab edge slip connection to accommodate potential differential settlement of new and old structures

49. Typical earned credit areas include:

50. Development Density & Transportation access-siting

51. Existing Building re-use – historic zoning

52. High levels of Recycled content – high-rise construction

53. Non-Roof Heat Island effect reduction – below grade parking

54. Optimizing energy performance – design best practices

55. Daylighting and views – design best practices

57. LEED Buildings achieve 7.38% higher rental rates over non-LEED buildings (2011 CoStar)

58. LEED Buildings have 4.1% higher occupancy (2008 CoStar)

59. LEED Buildings sell for an average of $171/sf more than non-LEED buildings (2008 CoStar)

61. Typical Boston High-Rise Energy costs:

62. $4.00/sf/year (Boston High-Rise Property Survey)

63. Atlantic Wharf Energy cost: $2.59sf/year (as estimated from energy model)

64. Typical Boston High-Rise Water cost: $0.25/sf