The Church of the Holy Trinity in the Kostroma region is a rare example of a tiered cross-shaped temple with a five-domed completion, characteristic of the 18th century and inspired by wooden prototypes. Its facade, executed in a classical style, is marked by restraint. The walls of the building are covered with lime plaster and whitewashed. The temple consists of a two-tiered lower square with rounded corners, on which is placed an octagon with a gentle roof and a five-domed structure with faceted two-tiered drums. To the east, north, and south, the temple is adjoined by equal rectangular apses and two chapels under hipped roofs: the northern, Archangel Michael, and the southern, Assumption of the Virgin. To the west is a small elongated refectory with a gable roof. The apse, chapels, and refectory are significantly lower than the lower tier of the temple. In front of the entrance on the western side is a small narthex. Brick cornices with a simple pattern run along the upper part of the walls of all volumes, and on the apse, chapels, and refectory, they are complemented by bands of small bricks. Smooth pilasters divide the wall surfaces. The windows at the rounded corners of the lower tier are an unusual compositional technique. They are rectangular, without frames, while in the second light of the temple, they are square.

The interior space of the temple, although small, connects to the apse through a triple arched passage and to the chapels and refectory through wide doorways. The octagon, resting on trompes, is covered by an eight-part closed vault with ribs above the windows, the apse is completed with a semi-dome vault, and in the chapels, refectory, and narthex, there are flat ceilings.

The interior of the temple is decorated with paintings done in glue paints in the early 20th century. On the ceiling of the octagon, the Holy Spirit is depicted against a starry sky, and in the trompes, traditional figures of the evangelists. A wide ornamental band with a plant pattern runs along the walls at the level of the trompes. In the other rooms, the walls are plastered and whitewashed.