The Evolution of a Flourishing Business
We’re proud to be a family-run business known for our integrity, attention to detail, and ability to deliver seamless home additions that blend perfectly with your existing home.
Brothers Ralph and Ian Pathuis entered the building industry as subcontractors and took over an existing construction business, rebranding it as Freedom Constructions.
Ralph and Ian decided to part ways. Ralph continued his path in the industry by founding Keystone Building Services, marking the beginning of a new chapter focused on second storey additions.
Ralph’s son, Steve Pathuis, joined the family business. With a fresh perspective and practical experience, Steve became a driving force behind modernising operations.
Keystone secured long-term relationships with trusted brands like Beaumont Tiles, James Hardie, and others, ensuring consistent quality and smoother project delivery.
Following strong demand in the home renovation market, Keystone completed a record number of second storey additions — reinforcing its reputation for reliability and quality.
We’re proud to be a family-run business known for our integrity, attention to detail, and ability to deliver seamless home additions that blend perfectly with your existing home.
A second storey adds an entirely new dimension to your home, opening up a world of opportunity to accommodate for your lifestyle. Here’s why people choose Keystone to complete their second storey addition.
We’re committed on completing your build on time and within budget.
Most clients stay in their homes during construction, no need to pay for rent or storage.
We keep noise, mess, & intrusion low, cleaning up daily and protecting your living space.
We design with your lifestyle in mind and keep you involved every step of the way.
Clear, detailed pricing in your contract—no surprises or unexpected charges.
We’ve delivered quality second storey additions since 1997 with honesty and care.
Your first consultation and quote are on us!