Kellogg Concepts has designed two options for an Accessory Dwelling Unit above a new Garage-Workspace, adjoining an existing single family house in Napa, California. The existing house is a one story home with a attic bedroom loft. It is designed in a 1920s bungalow farmhouse style with enclosed front porch, multi-level gable roof, and a distinct front roof dormer window opening to the bedroom loft. The materials include traditional double hung wood windows and cedar shingle exterior skin.
Existing Single Family Farmhouse:
The existing property includes a large side yard space adjacent to the existing house, which serves as an ideal location for the new accessory dwelling unit and garage-workspace. The new garage-work space serves as both an enclosed full size parking space and a substantial area for a workshop-art studio. The first design option is an upscale 785sf one bedroom unit that would be the primary dwelling unit for the property, and the existing farmhouse would serve as an accessory dwelling unit for a moderate income family. The second design option is a modest 540sf one bedroom unit serving as the additional dwelling unit. Both options support the need to provide additional dwelling units to increase availability of housing in existing California bay-area neighborhoods.
Design Option 1:
This design sites the new structure in the side yard open space with the front elevation set back 5 ft from the enclosed front porch, aligning with the entry door of the existing house. The design utilizes a continuous gable roof with a central roof ridge acting as a spine connecting the entire length of the structure, which also provides an open cathedral ceiling in the living spaces. The new master bedroom is located at the front of the house, setback symmetrically 3’-9” on each side from the first floor Garage-Work Space, creating a symbolic second floor dormer that reflects the roof dormer of the existing house. The open plan living-dining-kitchen space faces to the back yard and includes a second floor deck covered by an extension of the central roof ridge and gable roof. The bedroom gable wall includes a pair of casement and picture windows facing to the front yard, and the living-dining room gable wall includes a pair of large sliding patio doors and picture windows facing to the deck and backyard. The front gable wall also includes a projecting planter balcony below the picture window that adds to the depth of the front elevation. The entry to the dwelling unit is located on the side wall with an interior single run stair to the second floor that opens into the living-dining area. And horizontal bands of awning windows on the opposite walls of the house carry through the line of the ridge beam spine. The materials include simple exterior stucco walls, casement and awning windows with fixed glass picture windows, optional glass or open metal grille deck railings, and horizontal clapboard base and mid-level belt course to enhance the horizontal scale of the new two story structure and relationship to the existing house.
Design Option 1, New Site Plan:
Design Option 1, New Garage-Workspace First Floor Plan:
Design Option 1, New Accessory Dwelling Unit Second Floor Plan:
Design Option 1, New Front Elevation:
Design Option 1, Front and Side Yard View:
Design Option 1, New Rear Elevation and Side Yard View:
Design Option 1, Second Level Deck View:
Design Option 1, Living-Dining-Kitchen Interior View:
Design Option 2:
This design sites the new structure in the side yard open space, with the front yard setback aligned with the existing house enclosed front porch. The design integrates the mass and scale of the new two story structure with the small single story house, while also respecting the bungalow farmhouse style. The design includes a carefully stepped back front elevation with a multi-level gable roof stepped down from the second floor dwelling unit to the first floor garage-workspace, and a front elevation roof dormer window opening into the dwelling unit living space, harmonizing with the style of the existing single story house. The new dwelling unit is served by an exterior entry stair located on the side of the new structure to open the space and provide light between the new and existing structures. The materials include simple exterior stucco walls, double hung windows, optional glass or open metal grille stair and deck railings, and horizontal clapboard base and mid level belt course to enhance the horizontal scale of the new two story structure and relationship to the existing house.
Design Option 2, Site Plan:
Design Option 2, New Garage-Workspace First Floor Plan:
Design Option 2, New Accessory Dwelling Unit Second Floor Plan:
Design Option 2, New Front Elevation:
Design Option 2, Front and Side Yard View:
Design Option 2, New Accessory Dwelling Unit Entry:
Design Option 2, New Garage-Accessory Dwelling Unit Rear Elevation:
Designed by,
James Kellogg
Principal, Kellogg Concepts
Kellogg Concepts 