A Chaturmukha linga is placed on top of the stone platform in the mandapa. As per the literal meaning of the term Chaturmukha, the linga has four faces, each facing a cardinal direction. The linga is made of a black stone and is worshipped as the primary deity by the locals. According to popular lore, the Chaturmukha linga represents Shiva, Parvati, Brahma, and Vishnu. The mukha facing the east (entrance gate) is of Shiva with a heavy jatabhara on the head. The south face of the linga has a heavy jatamukuta (matted crown) on its head and hairlocks cascading down to the shoulders. The west face (rear) also has a jatamukuta, albeit carved slightly differently from the other three. The north face has snail-shaped curls culminating in a jatamukuta. The deity is adorned with a beautiful necklace. The sringara (attributes) of all the four faces of the Chaturmukha linga are done differently. This could be a representation of Maheshmurti or the trinity, with Surya also depicted.
In front of the entrance to the mulaprasada (main temple) inside the complex, there is a platform with ancient stone sculptures of a goddess (probably Parvati), Ganesha (covered in vermilion) and a small Nandi. Another Nandi figure, bigger in size, is placed directly in front of the temple.
The pillar on the north end of the antarala has an inscription in Brahmi script with Gupta letters playing an important role in dating the foundation of the temple. The inscription is carved below a full-blown lotus. However, the surface of the pillar has deteriorated and the letters are not clear, making it difficult to discern the meaning of the inscription. Nevertheless, one can observe that the inscription comprises twelve lines. The last three lines appear distinct in their letters and style compared to the upper part of the inscription. The first three lines of the inscription discuss the Shiva linga and the temple.
View of the mulaprasada (main temple) from the southwest. The garbhagriha, unlike the mandapa exterior, shows some decoration on its façade. The garbhagriha stands on base mouldings with jaali (checkered) windows and chaitya arches. It has a simple latina-type shikhara (spire) with niches topped by udgama pediments (pediments with interconnected chaitya dormers) which look like miniature shikaras. At the apex, an amalaka is placed topped by bijapuraka (citron fruit).
The garbhagriha, or inner sanctum, of the temple, is a small and dimly lit chamber currently housing a sculpture of the Goddess Adi Shakti. The only decoration visible is at the entrance of this space: the T-shaped doorframe which has multiple decorated shakhas (vertical mouldings on the door jamb). The bottom of the shakha depicts the river Goddess Ganga and Yamuna which are presently in a bad state of preservation.
The mandapa (pillared hall) in the Shiva Temple of Charchoma is a rectangular hall featuring a stone platform at its centre. Four pillars stand at each corner of the platform, presently covered with decorated cloth pieces. The pillars are topped with brackets supporting the ceiling which follows the trabeated system of constructions.