Background: The end-of-life experience is significantly influenced by the surrounding environment, emphasizing the importance of exploring built environmental factors in palliative care, especially for pediatric patients. As the majority of end-of-life individuals are elderly or adults, most studies have focused on the environment for this demographic. However, it is essential to recognize that children and adolescents may have distinct needs in this regard. Aim: This narrative review aims to explore the impact of the built environment on pediatric end-of-life patients in inpatient units within palliative care settings. Method: A comprehensive search was conducted across four key databases (PubMed, MEDLINE, PsycINFO, and CINAHL) to identify relevant articles. The screening process commenced with an initial assessment of article titles and abstracts, followed by a thorough examination of full-text studies that met the inclusion criteria. Data synthesis involved thematic analysis facilitated by NVIVO software and informed by the findings extracted from selected literature. Results: The review identified 22 studies meeting inclusion criteria, revealing key insights into environmental considerations in pediatric palliative care. Four themes emerged, highlighting the significance of activities and play environments, accommodation spaces for patients, supportive spaces for families, and outdoor and green spaces. Conclusions: Acknowledging limited research on architectural aspects and reliance on family and staff perspectives, future studies should prioritize understanding pediatric patients’ perspectives, particularly adolescents. The study underscores the importance of enhancing environmental design in pediatric palliative care to meet the unique needs of patients and their families.