7-B-23-HZ

Level II: Mechanicsville H

Approved

Map Case File

Recommendation

Staff recommends approval of Certificate 7-B-23-HZ as submitted.

Applicant Request

Accessory structure

- New secondary structure (detached garage with accessory dwelling unit above). Rectangular garage will measure 24' wide by 28' deep, located approximately 28' from the rear of the primary structure and 3' from the left (southwest) side property line. The garage will be accessible via an existing driveway on the left side of the primary house. The garage features a front-gable roof (12/12 pitch) clad in architectural shingles, with two shed-roof dormers (4/12 pitch) extending to each side. The garage will be clad in 4" lap fiber cement siding, with fiber cement shake siding on the dormers. The façade (southeast) features two 8' wide carriage-style steel garage doors with transom windows, and two 1/1 double-hung composite windows in the gable fields. On the side elevations, three evenly spaced windows are located on each dormer, with two pedestrian access doors flanking a window on the ground level of both sides. The rear elevation (northwest) features an upper-level window in the gable field. Additional design elements include triangular wood brackets and 4" fiber cement trim around windows and doors.

Mechanicsville H

- Style: Craftsman, c.1920
  - 1.5-story frame residence with a side-gable roof clad in asphalt shingles and an exterior of wood lap siding. Roof features a centered front-gable dormer and overhanging eaves. Full-length recessed front porch with wood posts on brick piers. Exterior brick chimney.

Applicable Guidelines

Mechanicsville Design Guidelines, adopted by the Knoxville City Council on September 20, 2011.

- U. Rules for Secondary Structures
- 1. The design of outbuildings, such as garages, shall acknowledge and suggest the function of original outbuildings that would have been located in the neighborhood.
- 2. The design of features like garage doors that face the street must mimic carriage house doors from an era consistent with the primary building on the lot.
- 3. Garages and outbuildings must be located behind the primary building at the rear of the lot.
- 4. Design characteristics and materials used in constructing new outbuildings or accessory buildings must be selected from this list: a roof pitch consistent with the primary building on the lot; overhanging eaves; exposed rafter tails; wood windows; wood lap siding with a four inch lap; board and batten; concrete siding hung to emulate four inch lap siding or used as board in board and batten; masonry, but not exposed concrete block or split-face block.
- A. Rules for Roofs
- 1. The shape of replacement roofs or roofs on new construction shall imitate the shapes of roofs on neighboring existing houses or other houses of the same architectural style. Roof pitch must duplicate the 12/12 pitch most often found in the neighborhood, the roof pitch typical of the style being referenced by a new building, or the pitch of neighboring buildings. Roof shapes must be complex, using a combination of hips with gables, dormers, or where appropriate to the style, turrets, or other features that emphasize the importance of Victorian-era or Craftsman styling.
- 2. The eaves on additions or new buildings must have an overhang that mimics existing buildings near the property. A minimum eave overhang of at least eight inches must be retained or used on new buildings or additions to existing buildings.
- E. Rules for Wall Coverings:
- 1. Synthetic siding is inappropriate and is not allowed either as replacement siding on existing buildings or new siding in new construction.
- 4. New construction must incorporate corner and trim boards and appropriate door and window trim to be compatible with the adjacent historic buildings.
- 12. Concrete siding (also called Hardi-board) is allowed on outbuildings and garages for new construction only. The material can be used like board and batten if placed vertically. Batten strips of wood must be used, however, to preserve the look of historic materials. If used like normal siding, it must have a reveal of no more than 4.25 inches.