Historic Zoning Commission

Scenic Drive NC: Level II

12-B-23-HZ

Staff Recommendation

Staff recommends approval of Certificate 12-B-23-HZ as submitted.


Location Knoxville
800 Blows Ferry Rd. 37919

Owner
Thomas Thomas Boyd

Applicant Request
Accessory structure; Additions; Roofing
New secondary structures; new porch and greenhouse additions; exterior rehabilitation of existing rear addition.

New secondary structures: new garage, carport, and studio structures to be constructed to the rear of the house. Garage measure 28' wide by 24' deep, which adjoins a carport and an open stair, measuring 20' wide by 24' deep. A 20'-8" wide by 24' deep studio is adjacent to the open stair; the overall secondary structure massing is 68'-8" wide by 24' deep. The flat-roof structures will extend into a terrace, formed by extending the garage walls and building up the land to create a flat area. The new structures will feature flat roofs, white-painted brick exteriors to match the primary house, and a multi-light garage door. A painted steel canopy structure will extend west to connect the secondary structures with the rear addition.

New additions: a 16'-2" wide by 8'-6" deep greenhouse, enclosed with glass, is proposed for the northeast corner of the house; the greenhouse will be connected to the house via a flat roof. On the southeast corner of the structure, a flat-roof porch supported by painted steel columns will project from the existing addition.

Exterior rehabilitation of rear addition: existing addition, dating to the 1960s, features a large front-gable roof which extends from the rear of the house. The applicants propose to remove the gable roof and install a new flat roof, which will connect with the new porch and greenhouse. New multi-light steel windows will be installed on the rear addition.

The primary house will receive a new slate roof to replace the existing asphalt shingle roof, a new flat-roof canopy over the entry to replace the existing steel canopy, and replacement of the non-historic window shutters.

Staff Comments
Georgian Revival, c. 1950.
    Two story frame with brick veneer wall covering. Side gable roof with asphalt shingle covering. Eight over eight double hung windows. Transom at front entry.

6. New additions and constructions shall conform to the prevailing widths and heights of typical facades and adjacent houses. The footprint of new additions and constructions should be in character and proportion with contributing neighboring houses, even if originally platted lots have been combined into larger lots. Detached accessory buildings shall be proportional to the house in height and size.

9. The recommended location for additions is to the rear or side of existing buildings. Additions to the front of buildings are strongly discouraged because they obscure the original architectural designs. Front additions are not appropriate for contributing structures. If additions are to be made to the side elevations of existing buildings, they should be located at least five feet behind the front façade of the existing building.

10. Detached accessory buildings, including carports and detached garages, should be located at least fifteen feet to the rear of the front façade line and no nearer than five feet to a side or rear lot line. In size, they should not exceed the building footprint of the principal building and should be consistent in scale with the primary building on the lot.

11. The design of additions, accessory buildings, including carports, and modifications, in particular the front façade of the house, should be consistent with the character of the main structure.

12. If an addition or modification is made to an existing house, the wall cladding material should match or complement those on the existing house. Traditional combinations such as wood clapboard or wood shingle siding additions on brick or stone primary structures are acceptable if matching materials cannot be secured. The roofing material for additions and modifications should match the existing roofing material.

Case History