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Rahnch are building contractors and project managers specialising in the planning, management and construction of educational, commercial and medium density residential projects.

We have the ability to competitively price and carry out projects successfully within budget and time constraints.

Rahnch, headed by Wally Chidiac, was formed in February 1990 to help meet the demand for professional, medium-sized contracting organisations.

We have an extensive selection of qualified professionals and contractors, and our success is based on choosing the best for each project. Our management system, which includes estimating, cost control, programming and accounting, together with our site control integrated management system, ensures the best possible outcome for your project.

Our Integrated Management System is compliant with the following standards:


  • ISO9001 – 2008 International Standard for Quality Management
  • AS/NZS 4801:2001 – Australian Standard for Safety Management
  • ISO 14001: 2004 – International Standard for Environment Management


We deliver projects from inception to completion and can help you plan, design and build your next project.

Get in touch today on buildbetter@rahnch.com.au or (+612) 9517 9755.



Our wide range of experience and resources allows Rahnch to provide value-adding services to clients on even the most complex project.

  • Construction
  • Refurbishment
  • Fit Out & Interiors
  • Remediation
  • Project & Development Management
  • Design & Construction
  • Heritage Restoration




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Denis Hopkins

Managing Director / sda international

Rahnch have consistently shown that they can deliver the highest quality finished product on time and on budget. Rahnch contractors are team players, proven to seek the best result for the client and deal with any complications in a reasoned and non-confrontational manner. We look forward to working again with Rahnch and can recommend them as quality builders to any prospective client.

John Stalley

Partner / Nix Management

Rahnch completed construction on 18-20 Parriwi Road, Mosman and 118-120 Mount Street, Coogee. As Project Managers for both projects, Nix Management confirms that the projects were managed efficiently and to our satisfaction with regard to cost, time and quality. Rahnch's previous experience with this type of development has been a valuable asset and their company’s management and on-site supervision have been commendable. Rahnch were prepared to work as part of a team effort to co-ordinate a positive result for construction issues and principal-induced timing decisions that would have otherwise affected the timely completion of the projects.

Adel Khreich

Director / Blue Visions Management

Rahnch was engaged by us as the design and construction contractor for the design and fit out of commercial and retail space on a large national rollout for one of our telecommunications clients. Rahnch performed very well and to our client’s expectations in the design and delivery of all sites within this national rollout. We found Rahnch to be very cooperative throughout the process and their site supervision was of a very high standard. The rollout programme required a very high standard of quality finishes and Rahnch was able to achieve that through their quality control process.

John Hawley

Congregational Business Manager / The Sisters of The Good Samaritan

I have represented my client on three substantial building projects with Rahnch and have been impressed with Wally's attention to detail, his commitment to work of the highest quality and, perhaps most of all, his ability to deliver the finished works within the contract price. His approach to variations has always been balanced and reasonable.

Camille Rahme

Director / Provision Developments

Rahnch Constructions is one of the best builders I have dealt with as a developer over the past 20 years in successful business. In our business, if the developer, the builder and the subcontractors aren’t working together as partners, problems can be anticipated. That is why I will prudently involve Rahnch at the planning stage because then I can be assured that every aspect of the job is considered, well thought out and will be implemented and delivered, thus eliminating costly variations and time delays. The close involvement of Wally Chidiac makes sure that no detail is left unattended and his meticulous and proactive management of the project gives me great confidence that every aspect of the job will be finished to a high standard, within budget and on time. Wally has earned the respect and loyalty of his staff and subcontractors and their commitment to partnership and teamwork is reciprocated on site. Wally’s jovial nature makes working with him a pleasure. I have absolutely no hesitation in recommending Rahnch Constructions.