It is almost always a good idea to at least consult a contractor when planning major renovations in your home. In fact, many jobs today require professional help to meet code or regulatory requirements.
As for the bathrooms, there are many reasons to seriously consider getting the assistance of licensed professionals to properly complete the renovations you need timely, efficiently, and effective. You can also hire professionals for complete bathroom renovations via https://actrenovations.com.au/
Some entrepreneurs you may wish to use for a project of this nature would include general contractors, carpenters, plumbers and / or electricians.
You will probably find that friends and family are often excellent sources of recommendations for advice and guidance on the appropriate professionals to hire.
You must also take all recommendations with a grain of salt and ask around a little more. Chances are if the job is either exceptionally good or bad, you will hear from more than one source.
You should also ask for references and any contractor job pictures you are considering. Most of them are very proud of the work they do and more willing to share before and after photos of many projects.
If the contractor you are considering can not provide these or seem offended that you asked, Seeing their work not only gives you a good indication of their style, but also the quality of the work they do as well.
You can ask and perhaps the chance to actually see a work in progress by visiting a site. This will allow you the opportunity to see the kind of attention they pay to detail and every corner that can be cut during the process.