300 Mercer Street is a high rise building centrally located in Greenwich Village. Walsh renovated the exterior lobby area, converting the 26 ft high marble clad columns into illuminated glass columns with stainless steel fittings and trim. Walsh also added a giant butterfly canopy, fabricated by Ferra Design, outside the main entrance. The exterior lobby ceiling features an insulated metal panel soffit that was custom-fabricated in-house by Walsh.