About Us

Kathy Barnsley knows the Southern Highlands well, having practiced in the area since 1991. She and her team are dedicated to providing outstanding one-on-one architectural services for the whole of the Highlands and beyond. Kathy’s professional experience and practice is varied, encompassing new houses, alterations & additions to existing buildings, new residential unit developments and small to medium sized commercial projects.

Above all, Kathy respects her clients’ needs, desires and budget, working together with them to arrive at a solution. She listens to her clients and works closely with them to pass on the benefit of her experience, gained both in Australia and in the USA where she was born and raised. Kathy is an attentive, enthusiastic and approachable professional, well known for her attention to detail and to her clients. She offers a sensitive approach to design, regardless of the size of the project, giving her clients the best hands-on professional service.

Our Services


Schematic Design

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Development Application Documentation

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Construction Certificate Documentation

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Construction Documentation

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Contract Administration

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Our Team Members

Kathy Barnsley
Kathy Barnsley
Kathy has been a practising architect in the Southern Highlands since 1991. She started her own architectural consultancy in 1998 in Bowral and has since purchased the business premises in Moss Vale where the business has been located since 2003.

  • 1989: Bachelor of Architecture, Syracuse University, New York, USA.
  • Chartered and registered architect in Australia since 1995.
  • Member of the Australian Institute of Architects since 1995.
  • Chair of the Southern Highlands Business Women’s Network since 2005.
  • Founding board member of the Southern Highlands Chamber of Commerce & Industry from 2013 to 2014.
  • Executive committee member of the Moss Vale Chamber of Commerce from 2004 to 2014.
  • Member of the Moss Vale Master Plan Committee until disbanding.
  • Experience in architectural consulting firms in the USA and Southern Highlands, Australia.
Lisa Harvey
Lisa Harvey
Lisa worked for three different architectural design companies as a CAD operator/draftsperson from 1999 before joining the KBA team in 2010.
  • 2001: Certificate IV in Graphic Design Foundation.
  • 2000: Certificate in Photoshop 6+.
  • 1998: Diploma in Architectural Technology.
Jennifer McIllhatton
Jennifer McIllhatton
After growing up and obtaining her fine arts degree in the USA, Jennifer travelled to Australia, met her husband and settled in Australia to raise her family. She started her own drafting business in 2005 in Young, working on residential projects with a local builder, a local interior designer and on her own commissions. She joined the KBA team in 2012 when she and her family relocated to Bowral.
  • 1992: Bachelor of Fine Arts, Parsons School of Design & The New School, New York, USA

Our Happy Clients

We are really pleased with how the new layout works, it is so much more functional and a great space to live in and enjoy. We definitely have the indoor/outdoor feel with windows framing the trees and view, very relaxing to come home to.


We greatly appreciate the work you and your team have put in, it is of a very high standard and we have been very happy with the outcome thus far. I cannot tell you how excited we are with the vision that is forming, there have been so many great conversations and plenty of excitement that came from even the more mundane details and this has been a great start to the whole process.


We are thrilled with the light and layout, it is a far cry from the dark and damp previous incarnation. Thank you so much for your input and calming support at such a crucial stage in the development.

Virginia and Steve

I know I have said this a couple of times before but the house and the inside of the house look fantastic. Everything is coming along and I couldn’t be prouder and happier with it all. Thank you both so much for the design and work both yourselves and your teams have done on making our new home become a reality from just a dream and for making the building of our house a pleasure to be involved in.


Thanks again for being involved in our fantastic new space. It looks great and makes us feel proud!


Thanks for all your assistance – the home is fantastic. I have been recommending you to everyone I speak to!


I’m not usually one to give a lot of praise, but you and the team did a really great job on a difficult block & access. You really know your stuff and helped us with all our decisions with well explained information right from the first day. We both really appreciated all your work!


Thanks for not only being a great architect but for being a constant source of advice & wisdom.


The house is beautiful due to a combination of awesome architect and builder.


Thank you for all you have contributed to the project, your expertise, professionalism, tolerance of the inexperience and great sense of humour. You are truly a pleasure to work with.


Thank you Kathy. We are so happy with our renovations and loved your ideas and design.


We engaged the services of Kathy Barnsley for an extensive renovation and addition to our home. From the start of the design process, Kathy and her team collaboratively worked with us – listening to our needs and requirements and delivering architectural solutions matching our ideas and budget. During the building phase Kathy was side-by-side with us both administering the building contract and architecting details of updated and additional design variations. We are thrilled with the quality and function of our new beautiful house and we would use the services of Kathy Barnsley Architects again if we embarked on another project. We highly recommend Kathy and her team.