West Village Townhouse (New York, USA), BW Architects
Source: http://bw-architects.com/projects/west-village-townhouse/
Loft study.
302 N. Aspen Street (Colorado, USA), TruLinea Architects
Source: http://trulinea.com/
Carmel Valley House (California, USA), renovated by Sally Sirkin Lewis
Source: http://www.architecturaldigest.com/decor/2013-02/before-after-contest-home-office-renovation