About us

GW Building Pty Ltd is a privately owned Australian construction company established by Greg Windust in January 2009. Greg utilised the skills and reputation he earned as a sole trader within the residential and commercial sectors over a period of ten years to establish the company, which coincided with the demand for professional, efficient and high quality construction services within the Central Coast, Sydney and Hunter Valley marketplace.

GW Building’s success is founded on our attention to detail and ability to complete projects safely, on time, on budget and to client specification.

Across our broad portfolio of projects and customers, our principles remain the same. Our primary goal is to complete projects safely and to client specification, and to do this we maintain open communication with clearly defined project scopes and quality expectations. We take a highly collaborative approach, bringing together our customers, their appointed consultants and our own skilled and professional staff to get the best results.

GW Building employs a highly experienced team of skilled tradesmen under our direct control, ensuring each employee shares the company’s commitment to quality. Our employees have the flexibility and experience to undertake projects ranging from minor repairs and maintenance to major refurbishments and specialist projects. Our approach of maintaining a consistent project team from the initial client contact through to completion of the project means that we develop effective relationships that further assure quality outcomes.

Experts in constructing the highest quality projects, including architect designed houses, renovations, extensions, community halls, high rise residential and landscaping works, GW Building’s reputation attracts developers, councils and architects who want a quality finish for their projects. Factors critical to the success of GW Building include:

Whether you are renovating or constructing a new home, refurbishing a commercial premises or constructing community facilities, you are guaranteed to receive a high-quality result, every time.

GW Building can provide a variety of services depending on client requirements. We have extensive experience in the following project delivery methods:


GW Building recognises that strong safety, health and environmental performance is vital to our business.

Our safety, health and environmental performance is driven by a comprehensive OHSE Management System which identifies and manages safety, health and environmental risks. Our OHSE Management System has been accredited by the NSW Department of Housing (Resitech) in accordance with the requirements of the OHSE Management System Guidelines 4th edition, June 2004. Our comprehensive OHSE Management System is revised and further developed for each and every project, ensuring it meets requirements for site specific conditions and the project scope.