79 Build Division

Spiros Mastrokostas

Nikos Mastrokostas
79 Design Division

Sophie Mastrokostas
"Design the life you want"

Anna Koveos
"Design is a journey"
Living and growing up in Greece, Sophie’s eye for design channelled her energy into designing European style homes. Her love and passion for design took her one step further in upgrading in a Bachelor’s of Interior Design degree. Inspired by Mediterranean influence combined with modern clean lines identifies her design.
79 Architictural Division


SeventyNine Design & Build’s mission is simple, to bring the client a carefully edited selection of the best design, architecture and interior projects.
Sophie encourages a collaborative approach with clients to ensure cohesiveness, clarity, trust and respect throughout the entire architectural process.
SeventyNine Design & Build’s goal is to create architecture that is admired for each design, functionality while providing lasting value to the client for years to come.