369 Building Design is a creative workspace that facilitates the creation of harmonious spaces for people love where they live, work and thrive in. Our intention is to create designs that celebrate the experience of spaces, and life within them. Our holistic approach aims to consolidate beauty, meaning and function by incorporating practicality as well as sustainability for the conscious consumer.

We work with you to bring your vision to life and take care of all the necessities to make the whole design and permit process from beginning to end as carefree as possible for you, the client.

We provide exterior, interior and or landscape design, interwoven to optimal final outomes in these areas but not limited to; Multi-Unit Developments, Town Planning, Private residences, Renovations & Extensions, Commercial & Heritage.


Principal Designer and Company Director Mariana Gagula has worked in the building design and construction industry for almost twenty years. After completing her qualifications she spent many years working in various boutique firms in Melbourne, creating a diverse and standout portfolio and further refining her design skills, later breaking out on her own to see her own vision and direction come to life in the form of 369 Building Design.

A world traveler, nature lover and self-discovery aficionado, Mariana’s understanding and passion for the psychology of spaces and close connection to the subtle environments in which we live and work set the foundations for which she strives to create from. Her strong empathetic and intuitive streak sparks her passion for enhancing how a space makes you feel. She loves being able to walk into an existing room, see and feel exactly what remedy it needs for a total transformation, to enhance quality of life for the occupant.