Robert Plumb was conceived by William Dangar in 2006. At the time Dangar was working as the contributing garden editor for Belle Magazine for the then editor Eric Matthews. Part of Dangar's role was to produce a page in every issue dedicated to outdoor elements for the home. After deciding to focus on the humble letterbox it was then that Dangar realised that there were no high quality architecturally designed products on the market that were mass produced. He set about designing a few simple prototypes that were featured in the article and Robert Plumb was born.

The name Robert Plumb is derived from the building tool called the plumb bob. A plumb-bob or a plummet is a weight, usually with a pointed tip on the bottom, that is suspended from a string and used as a vertical reference line, or plumb-line. The instrument has been used since at least the time of ancient Egypt to ensure that constructions are "plumb", or vertical.

Based on the success of the letterboxes the range was expanded to include outdoor furniture and accessories. Products were designed by Dangar then manufactured both locally and overseas and distributed nationally through retailers as well as from the Robert Plumb warehouse showroom in Botany. In 2010 Dangar teamed up with building craftsman Bill Clifton who was originally responsible for the manufacturing of all timber products as a contractor. This partnership has enabled the business to evolve into a multi faceted design business encompassing the stay bondi short stay rental properties as well as robert plumb project that is a design and construct building company.

Products:
• Timber Furniture
• Dining Tables, Chairs & Benches
• Lounges, Sofas & Armchairs
• Coffee Tables & Side Tables
• Stools & Ottomans
• Pool Lounges & Day Beds
• Kids Furniture
• Letterboxes
• House Numbers
• Lighting & Ornaments
• House Numbers
• Coffee Tables & Side Tables
• Stools & Ottomans
• Shower & Laundry
• Doormat
• Pots & Planters