APPROVAL for demolishing non-contributing rear sun porch and constructing new porch addition and roof dormer as per submitted drawing. Install skylight behind rear chimney. Install sash window in place of vent in west roof gable.
Phase I: Existing heavily altered rear porch to be removed. Reconfigured and slightly larger rear sun porch addition to be constructed. The ceiling is wood beaded board, which will be salvaged and reused for the reconfigured sun porch. Existing corner board at joint between addition and existing house will be retained to demarcate new from old. Corner details, frieze, soffit, casing dimensions, and siding exposure will match existing, using wood lap siding. Small inset porch with protective cover for new rear door will be constructed, using simplified classical detailing; wood tongue and groove porch flooring. Wood French doors and casement windows with transoms to be installed.
Phase 2: Addition of a dormer to the rear slope of the existing roof, stepped down from the main peak in two gables. Roof pitch over the sun room in this phase will match the pitch of the main roof. A skylight may be installed in the new roof area above the two center windows. The existing wood vent in the west gable (not believed to be original) will be replaced with a window sash (believed to be the original use for this frame), using the original casing. A skylight will be added to the east sloping roof, behind the existing chimney.
One-story frame with wood lap siding. Hip roof with lower cross gables and asphalt shingle roof covering. One story three-quarter front porch with fluted round columns with Ionic capitals. Brick foundation. Irregular plan. Recessed transom and sidelights at front entry. Projecting bay on south elevation.
STAFF FINDINGS
1) Due to the low elevation of the sidewalk the skylight behind the chimney, the modification to the bottom back roof edge and the new dormer would be not be highly visible or not visible at all from the sidewalk at the front.
2) The addition of a dormer to the rear slope of the existing roof is proposed to be stepped down from the main peak in two gables so that the original form of the main roof is still legible.
3) Some portions of the rear sunporch are early, but the overall structure is heavily altered and inappropriate to the style of the house.
4) The existing rear porch floor structure is wood and sits too close to the ground to be reliably maintained as un-treated wood.
5) The roof covering (shingle) is new and the roof structure is unknown, but it interacts poorly with the roof edge of the original back portion of the house, as evidenced by water damage and rot.
6) No early porch details exist as the walls of the porch have been rebuilt most recently using aluminum sliding doors.
7) The existing corner board at the joint between the proposed addition and existing house will adequately demarcate the new from the old, in addition to the proposed simplified classical detailing. The proposed French doors and casement windows with transoms are of a design that would be compatible with, but differentiated from, the existing original windows.
8) The existing wood vent in the west gable does not appear to be original. A window sash is believed to be original based on the fact that the existing complete frame and casing appears to have held a window at one time. The window is proposed to be installed on a secondary elevation.
9) Due to the low elevation of the sidewalk the skylight behind the chimney will be not be visible from the front sidewalk.
10) The proposed simulated divided light windows in the rear dormer will adequately evoke double-hungs.
OLD NORTH KNOX GUIDELINES
NEW ADDITIONS
1. Locate attached exterior additions at the rear or on an
inconspicuous side of a historic building, limiting the size and
scale in relationship to the historic building. Proportion is
very important.
2. Design new additions in a manner that makes clear what is
historic and what is new.
3. Consider the attached exterior addition both in terms of the
new use and the appearance of other buildings in the Historic
district. Design for the new work may be contemporary or
may reference design motifs from the historic buildings. In
either case, it should always be clearly differentiated from the
historic building and be compatible in terms of mass, materials,
size, texture, scale, relationship of solids to voids, and color.
4. Place new additions, such as balconies or solar greenhouses,
on non-character-defining elevations, and limit the size and
scale in relationship to the historic building.
7. New work should not appear to be as old as the historic
building. Do not duplicate the exact form, material, style, and
detailing of the historic building in the new addition.
8. New additions should not cause a lessening or loss of historic
character, including the historic building's design, materials,
workmanship, location, or setting.
WALLCOVERINGS p.14
3. New construction should use wood materials rather than
aluminum or vinyl siding. . . . Concrete composition planks may be
appropriate for new construction.
WINDOWS
1. Vinyl and aluminum replacement windows should not be used.
4. . . . False muntins or grids should not be used.
7. It can be appropriate to design and install additional windows
on the rear or another secondary elevation. The designs should
be compatible with the overall design of the building.
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