Notifiable work - frequently asked questions

Is a building with a mezzanine floor or split level balcony considered a storey when I determine if the building is two storeys or more? 


What if the building has a basement, is the basement counted as a storey for the purpose of applying the notifiable work requirements?  Yes, it is highly recommended that you obtain an as-constructed drainage diagram from the local government prior to undertaking the work. An as-constructed drawing showing the dimensions of the new work must be included with the Notifiable Work (Form 4/4A).

How will I know if a domestic building has a combined drain?  

If you suspect that the building has a combined horizontal drain you should request information from the local government before proceeding with work.

I am installing individual sub-meters in an apartment building. Do I have to inform the water service provider before I connect the meter and connect to the water service provider’s water supply infrastructure? 


I have been asked to add an additional toilet and shower to an existing home in a unsewered area. Can I do this under notifiable work?  Yes but, if the building work for the class 1a house also includes addition of 1 or more bedrooms then the Planning Regulation 2017, schedule 9, table 11 requires an application to the local government for assessment against the Queensland Plumbing and Wastewater Code, part 1, performance criteria 2.  This is for determining any increased load on the existing on-site waste water management system.
A builder wants me to quote on the installation of fixtures and fittings for a two bedroom extension to an existing home in an unsewered area. I am concerned that the existing wastewater system will not handle the additional hydraulic load. What do I do?  As the extension also requires a building approval, the building certifier is obligated before giving his/her decision notice to obtain evidence of approval from the local government regarding the continued suitability of the existing on-site wastewater management system. Before commencing any work on that aspect of drainage works, you should contact the appointed certifier or local government for evidence that the treatment plant work has been approved or otherwise.
What does ‘connected to trade waste’ mean? A trade waste drain is a specialist waste management drainage system for conveying commercial waste, grease, chemical, medical, high temperature or other hazardous waste.  A grease trap, oil separators or cooling pits may be required to prevent contaminants polluting the drainage network. Installing or relocating a fixture connected to trade waste will require local government approval prior to commencement of the works.