Stoneholm, also known as the Horace Lothrop House, occupies a 2.73 acre parcel at the northwest corner of Ames and East Streets, in a residential section of Sharon. The property is surrounded by a border of trees, most of which appear to be original plantings, and contains a carriage house in addition to the property's main:house. The main house is a Second Empire style building, two-and-one-half stories high with a mansard roof and cupola. Extending from the house's north elevation is a one-storey rear wing with a flat roof. The house is built of locally-quarried, rock-faced granite ashlar. Corner quoins and window trim (i.e. sills, quoined surrounds, arches and keystones) are made of rock-faced granite, but of a darker color than that of the walls.
The concavely cured mansard roof rests on a wooden cornice with paired brackets and is covered with slates which are cut to create a hexagonal pattern. All sash, except where noted otherwise, 15 2/2., A: ZULI The Facade (south elevation) is symmetrical; at its first storey is a wooden porch, three bays long and one bay deep with a low, half-hip roof. Each bay is framed by posts which have small brackets beneath the porch's solid apron and larger brackets set on their outer faces, supporting the cornice. The porch's center bay contains an additional pair of posts from which deep brackets rise to support a low pediment over the entry bay- At the center of the first storey is a rectangular opening containing paired doors with . panelled bases and arched lights. On each side of the entry is a single window set in a low-arched, quoined surround.
At the second storey, two windows (identical to thase of the storey) flank a central, paired window.. keystone. The arrangement of the second storey is repeated at the attic, where a wide central dormer contains two 1/1 windows with semi-circular transoms. The central dormer is framed by two wooden columns which support a cornice and low-pediment. Flanking the central dormer are two narrower dormers, each of which is trimmed with consoles supporting a low pediment. The east elevation contains many of the same elements as the facade, but is asymmetrically arranged at the first two stories. Moving south to north, the first storey has a semi-octagonal bay window, built of wood with 1/1 sash in each of its two angled faces and 2/2 sash in its east face. The cornice of the bay window is trimmed with brackets above which the roof rises to a semi-octagonal hip.
Next north is a one- stairs with curved, solid railings. At each corner are posts with brackets which support windows. North of the porch is a single window, identical to those of the facade's first storey. At the second storey, moving south to north, are a single window, a paired arched window and two single windows, all of which are identical to their counterparts at the second storey of the facade. At the attic are three symmetrically placed dormers, identical to those of the facade, although more widely spaced. The west elevation is symmetrically arranged with two semi-octagonal bay windows at the first storey, three single windows at the second storey and three dormers at the third storey. All decorative details are identical to those of corresponding features of the east elevation.
The north elevation is built of squared granite rubble and is asymmetrically eastern two-thirds of the first storey are blocked by the rear wing while its western third contains a simple 2/2 window set in an undecorated surround with a rectangular lintel and sill. At the second storey, two windows, identical to that of the first storey, blank a small, square light. At the attic are two dormers which are FHR-8-300A (11/78) UNITED STATES DEPARTMENT OF THE INTERIOR HERITAGE CONSERVATION AND RECREATION SERVICE NATIONAL REGISTER OF HISTORIC PLACES INVENTOR Y -- NOMINATION FORM FOR HCRS USE ONLY RECEIVED FEB 8 1980 DATEENTERED 2 CONTINUATION SHEET ITEM NUMBER 7. PAGE 2 identical to the outer darmers of the facade. The rear wing contains one window in its west elevation and two in its north elevation; both elevations are built of squared granite rubble.
The east elevation of the rear wing is built of rock-faced granite ashlar; each of its two windows has a quoined surround. The cupola is square in plan and has four identical elevations each of which now contains two single-pane windows, although it is likely that each originally had two sets of 1/1 sash. The cupola has a very low mansard roof set on brackets. Surrounding the cupola is an added widow's walk with a railing of square-plan balusters. The Carriage House is a one-and-one half storey, "I" plan structure, enclosed by a concavely curved mansard roof. Part of the building's south and east elevations are faced with rock-faced granite ashlar; elsewhere the carriage house is built of squared granite rubble. Throughout, the building is trimmed with rock-faced granite corner quoins.
Facing the angle created by the building's plan, the south elevation contains an off-center gable beneath which is a high entry arch with a guoined surround and panelled wooden doors. This arch is flanked by two windows, each of which con- tains 6/6 sash set in a stone surround with quoins, a low-arched head and keystone. Set at a right angle to the south facade of the carriage house is the east elevation (facade which contains a gable and high entry arch, identical to that of the south elevation. The building's other elevations are irregular in their fenestration. At the roof is a low square ventilator/cupola with three circular lights on each of its elevations, a low mansard roof and a weather vane. Alterations to the carriage house are minor, consisting mainly of the replacement of original slates with asphalt shingles.
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