25,4 mm is an architecture and urban design studio based in Šibenik, Croatia, founded in 2012 by architects Ivana Lozić and Marko Paić. The practice specialises in private villas, family residences, multi-residential developments, commercial spaces, public buildings, renovation projects and interior design. Its architectural philosophy is rooted in a careful understanding of each site's natural and historical characteristics, combining contemporary design with the distinctive identity of the Mediterranean environment and the individual requirements of its clients.
The studio develops tailored architectural solutions, from initial spatial concepts through detailed project design, with a strong emphasis on functionality, design quality and sensitivity to the surrounding environment. It has particular experience working within historic urban centres and protected cultural settings, where contemporary interventions require a thoughtful relationship with existing architecture. Its own office, located in a restored 16th-century Renaissance palace in the historic centre of Šibenik, reflects this philosophy by combining the preservation of architectural heritage with contemporary spatial design.
Notable completed projects include Villa Pergola in Šibenik, Villa Parona on the island of Zlarin, Sundance Villas in Primošten, Villa Seven Seas, Villa GG on Hvar and Villa Casa Nota on Pašman. The studio's portfolio also features the restoration of Barone Fortress in Šibenik, the Mendula Kindergarten and numerous private homes and residential developments across Dalmatia. Studio 25,4 mm is particularly relevant for landowners, property investors and clients planning contemporary luxury villas, the sensitive renovation of traditional stone houses or residential developments that combine modern living standards with the character of their location.