Achieving an inspired outcome for you, by understanding your needs with empathy, experience and forward thinking.



Our all-female team enables your journey with great ideas, understanding of building processes, and celebrating the delight that comes with seeing your dreams come to life.



You are the centre of our design process. Effective, clear communication with all project stakeholders is essential throughout the whole of the process. We sketch and we use 3-D CAD drawings to create efficient and effective drawings – so that you can understand our vision.


New homes, alterations and extensions to existing homes, alterations to heritage buildings, as well as the creation of outdoor living, garden and leisure projects. Providing full architectural design services. Past and current projects are located in Melbourne and suburbs, regional Victoria, and the Central West and South Coast regions of NSW.


For creating homes with a focus on health and harmony. Creating architecture that you can to and thrive in. Creating homes that inspire, that are beautiful, and homes that are sustainable.

Free Tips and Tricks

How do you begin your own home renovation?

We have been busy creating, writing, and videoing. We have prepared a series of useful resources just for you – to help you get your new home project off to a great start – and on the right track.

Get your home off to a great start now

Request A Consultation

Are you having problems with getting your renovation started?

To help you to identify and anticipate the potential roadblocks to a successful renovation, we offer a free 20-minute phone consultation with an architect. This will help you to clarify what you need to do, and when you’ll need to do it.

Request a consultation now

Architeam Award – Alterations and Additions to Existing Home, Thornbury

This project displays a thorough understanding of the aesthetic and functional subtleties of residential space and skilfully revitalises this prosaic mid century suburban house.

It manipulates outlook, function and circulation to create a sophisticated contemporary dwelling.

Judges Comments, Architeam Awards 2011

Sun Seeker – A Home Renovation for a Growing Family, Brunswick East

We engaged Cathi Colla Architects to design, plan, document and project manage our home renovation and extension.

Our 2 bed, modest Californian bungalow was transformed into a bright and light, 4 bed family home with dual living spaces. We had some planning challenges which CCA helped us navigate through.

We are thrilled with the end result.

C.B., Brunswick East

Re-Cladding An Existing Town House Development, Clifton Hill

Thank you Cathi, you were brilliant!

After three years of no direction, finally we have a professional. Thank you for an excellent presentation and clear ideas.

B.H. and M.D., Owners Corporation (Clifton Hill)

Alterations and Additions to Existing Residence, Thornbury, Victoria

I could see Cathi understood where we were at.

I knew how I wanted it to function but I didn’t know how I wanted it to look, or how it could look.

That is where Cathi came in.

Visit the project via this link.

Donna M., Thornbury

Renovations and Extensions to Existing Home, Brunswick East

Thank you for your professionalism, dedication, decisiveness and committed nature to which you conducted your role as a superintendant on this project.

Having now completed a few projects it is becoming easier to recognise the architects who can combine their attention to detail, creativeness and architectural style with a practical approach to building.

I would most definitely be happy to work with you again in the future.

A.K., Richmond

Melbourne Tianjin Gardens, Melbourne, Victoria (with Williams Boag Architects)

I would like to take this opportunity to express both the City of Melbourne’s and my appreciation of the effort that your company expended and the fine architectural result that has been achieved. I have received nothing but glowing reports on all aspects of  the project.

I would like to personally thank Cathi Colla for her involvement and her assertive point of view in endeavouring to achieve the results of which she had asked and we would expect. She was at all times courteous and a pleasure with whom to work.

James A. Jackson, City of Melbourne, City Projects Division, Project Management Branch

Alterations to Existing Apartment, Toorak, Victoria

When we sat down with Cathi and went through the scheme I was really impressed.

Cathi had listened to our requirements, addressed them, and came up with some really interesting ideas for our apartment. I was impressed with Cathi’s attention to detail and professionalism.

The work she did exceeded my expectations.

Don C., Toorak

Site Appraisal Service, Existing Residence, North Sydney, NSW


We especially appreciated the time and effort you put into understanding our needs and clarifying the brief. This was very much appreciated given that we are living on the other side of the world.

Bernadette H., Vancouver