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Welcome to Osti Constructions

Celebrating 30 years of building excellence across Sydney

Osti Constructions is operated by award-winning builder, George Ostavich.

Some of George’s Sydney projects have been featured in The Daily Telegraph, Best Houses Australia and other leading publications as well as awarded Finalist in numerous HIA Building Awards and MBA Excellence In Building Awards.

Backed with over 30 years of building and construction expertise George has established his reputation with home owners and industry peers for driving hundreds of home alteration, renovation and new home building projects to safe completion and success.

Our Building, Construction & Renovation Services
across Sydney and NSW

Renovations & Extensions between $100,000 & $1M

Whether you are looking to extend out or up, we offer superior project management to make it happen quickly and to budget whilst maintaining high quality standards. We also specialise in complex heritage home restorations.

New Custom Made Home Builds

Working alongside you, architects, designers, other trade professionals and local council, we’ll help drive your project from design to build, and within budget.

Granny Flat & Duplex Builds

Avoiding the “standard box” designs, we offer impressive customised tailored solutions to design and build these affordably for high function, unique design and value.

Building and Renovating is Risky and Costly.
This is How we Make it Safer for You

Expertise

30 years of building ethically and to NSW government standards has allowed our business to grow mainly through word of mouth.

Never any Short-cuts

With the increasing number of building projects found to be defective, we stand by our values to deliver high quality without compromise. We’ll be honest about what will and will not work for your budget.

Superior Project Management

This is the secret and yet often forgotten component to ensuring a building or renovation project is delivered without delay or issue. We continue to exceed client expectations in operating smooth, stress-free and quality projects.

Meet founder and builder, George Ostavich

Hi, and welcome to Osti Constructions. With over 30 years in the Sydney building and construction industry, I feel proud to have built my reputation for safety, high – quality workmanship, and excellent client service. 

I get asked all the time what makes us different and better and essentially I feel it comes down to experience and remaining hands-on in every project. 

I understand the building and renovation process can be daunting for many home owners, which is why I take a personal approach with every project. Everyone has different needs and wants and so a one-size-fits-all solution simply won’t do it, no matter how big or small your project. I take the time to understand your vision, lifestyle needs and budget in order to translate these into an achievable project for you.

I welcome you to contact me today to discuss your project?

We Love Sharing our Work

West Pennant Hills Home Renovation by Osti Constructions 5
West Pennant Hills Home Renovation by Osti Constructions 2
Osti Constructions Home Construction Builder Northern Beaches
Osti Constructions Northern beaches Kitchen
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Client Satisfaction is Important to Us

  • Homeowners Say: Excellent!



    George Ostavich managed the build and was a pleasure to deal with from day one. We always felt confident in George’s grasp of the project, his organisational skills and the integrity of the workmanship performed under his supervision. As we literally lived alongside the building team, we spoke with George daily and he always kept us informed and listened to any concerns or questions we had. He quickly established an awarenesss of our tastes, habits and our expectations. In short, if it was important to us, it was important to George.

    Overall we feel that the quality of the build is excellent. We were careful in the choice of our finishes and these have been installed and applied with the same consideration. We would recommend George and his team back to our site anytime.

    Rodney and Madelene Lindsell

    Residential Extensive of Federation Brick Home, CHATSWOOD NSW

  • Industry peers Say. No short-cuts and high workmanship!


    I have been working on George’s new home building and renovation projects for over 20 years and one of the reasons I continue to do so is because George is an absolutely ethical operator, committed to ensuring his clients expectations are over-exceeded.

    He excels at building long lasting relationships with his suppliers and clients and what stands out is his high attention to detail to all the little things other builders tend to ignore or think a client “won’t notice”.

    Over the 20 years I can honestly say I have never witnessed a disappointed customer, a delayed project or a customer complaining about price surprises or quality issues. And that’s why he continues to be one of the very few builders in the industry I choose to work with or recommend to clients.

    George is highly approachable with his clients, even after project completion, and I’ve seen many of them come back ( years later) to engage him for new projects.

    Tony NOHRA

    Director, Norwest Building Renovators, Hills District Sydney NSW

Why risk it?

Discover a Safer Way to Build or Renovate

Combining building excellence with a personal passion to exceed client expectations, Osti Constructions offer you a safer way to build or renovate with confidence. Ready to take your project forward? Contact George for a FREE no-obligation discussion

Contact George Today