His work focuses on the private moments of women in Belle Époque interiors. He used a muted palette of greys and dark earth tones. His technique relies on suggestive brushwork and charcoal-like textures. Pieces such as The Necklace and Marthe with a Harp capture light on fabric and skin. He avoided the bright colours of his Impressionist contemporaries, preferring a more atmospheric aesthetic.

Modern collectors value Belleroche for his quiet, observational style. His prints offer a sense of intimacy that fits well in domestic spaces. The sketches of figures like Babette or the Young Lady Seated feel immediate and personal. His work provides a connection to the late nineteenth-century Parisian art scene without being overly formal. These prints suit interiors that require a touch of historical character and subtle tonal contrast.