지상부 건축물은 대예배당 및 사무실동과 이 두 건물을 연결하는 아트리움에 공용공간인 로비가 구성되어 있다. 이 교회의 특징인 예배공간은 밝은 빛으로 가득 찬 공간으로 만들어 반외부적인 환경을 만들고자 했다. 지붕 및 외벽을 반투명 재료를 사용, 주간에는
많은 빛을 유입하여 예배당 내부가 밝은 환경이 되도록 하고 야간에는 건물 전체가 조명기구(lighting fixture)와 같은 효과를 내도록 했다. 대예배당 좌우 부분은 가변식 벽체(movable wall)를 두어 필요에 따라 소예배당 공간으로 구분하여 사용할 수 있도록 하여 정해진 규모에서 필요한 공간을 확보하였다. 지하1층은 대지의 레벨차를 이용하여 채광을 최대한 확보했으며 선큰광장을 통한 진입부를 두어 지상층과 같은 환경을 만들고 독립된 동선체계로 지상부와 구분될 수도 있게 되어있다.
뒷마당은 옥외활동 장소로, 타워와 지하층으로 연결되는 부진입부로 동선을 유도하여 대지의 중심광장 역할을 하게 된다. 처음부터 교회의 성향과 상징성은 중요하게 다루어졌지만, 이런 부분이 직접적으로 드러나지 않는 설계가 되도록 결론을 내렸다.
The site of the Gyesan Church, located in close proximity to an expressway interchange, is positioned at the center of the local transportation network. As the site extends along the expressway in a curved line, the positioning of the building was planned in accordance with the configuration of the site. In order to show the symbolism of a church, a tower was erected alongside the church, facing the expressway, and acting as a local landmark. In consideration for future expansion, the levels above ground were developed in a limited manner, while the educational and service facilities and parking space were situated on the two basement levels. Above ground, a parking lot and an outdoor square are located, providing a place where buildings will be constructed in the future. During the remodel, educational facilities will be relocated and a parking space will take over the space where the educational facilities were previously. The section above the ground accommodates a chapel, office wing, lobby and the communal space. The atrium connects the two wings together.
The outstanding feature of this church is its large chapel. From the beginning, we intended to build a chapel filled with bright lights, thereby creating a semi-external environment. By using translucent materials for the roof and external walls, plenty of light was allowed to enter the building during the day, brightening the interior of the chapel, while it was considered suitable to use new materials and new construction methods to give the entire building the effect of a lighting fixture at night. Movable walls were placed on the right and left of the large chapel to create small chapel spaces, if necessary, thereby securing necessary spaces within the fixed scale. The first basement level houses a cafeteria, service and educational facilities, and a maximum amount of natural lighting was provided by taking advantage of the level differences of the site. On the basement floor, an entrance though a sunken plaza was created to make an environment similar to the above-ground level, while independent moving lines were provided to distinguish it from the above-ground levels.
The courtyard at the rear of the building is a place for outdoor activities and acts as the central square of the site by leading to the sub-entrance connected to the tower and basement floors. Although the inclination and symbolism of the church was dealt with great attention from the beginning, it was concluded that the design would not directly reveal such aspects.