What we do

From new homes to renovations, each project is individually designed for your needs. Based on Sydney’s Northern Beaches, Upstairs Design & Building Co has established itself as one of the leading design and construction companies in the area.

Founded in 1978, Upstairs Design & Building Co specialises in upstairs additions and renovations in the Northern Beaches area. Over the last 30 years, Upstairs Design & Building Co has completed over 350 upstairs additions, as well as new houses and commercial projects.

Designer and Builder, Stuart Kelman, is available to discuss with you the feasibility of initial building ideas and concepts.

Using a specialised architectural drafting program, we offer a complete design service.

We will build your project using the skills and talents our experienced team as well as overseeing the specialised trades of our skilled sub-contractors.


We are extremely proud of our team at Upstairs Design & Building Co. Bringing a range of experience from a variety of backgrounds and training, they are skilled and professional tradesmen who will help to make your building experience a highly enjoyable one.

Stuart Kelman - Designer / Builder

Owner Stuart Kelman leads the team with over 14 years experience. Winner of two Master Builder Association of NSW Excellence in Housing Awards, Stuart is committed to designing and building quality homes and working with clients to ensure all aspects of their projects run smoothly and to the highest standards.

David Norton, Builder

Dave joined the UDBC team in 2004 bringing with him a range of experience across all building fields. As the Foreman on site, Dave's excellent carpentry skills and professionalism are evident in all aspects of his work.

Wesley Harder, Carpenter

Having also joined the team in 2004, Wes has shown his commitment to ongoing professional development by combining his work with studies to become a qualified builder. With an eye for detail and a range of skills and experience, Wes is a valued team member.