If you would like to connect to water or sewerage but your property isn't serviced by a main, you need to find out if your property is suitable for a mains extension.
If you're connecting a property in an urban growth area, see our Augmentation Plans for infrastructure requirements.
Before you start, read our Land Development Manual
Developers should check whether services are available, as not all sites are suitable for connection. Our Land Development Manual (PDF 1MB) is a detailed guide that explains what’s involved in extending mains and what’s required for your building proposal.
See our Quick Guide to assist you with learning more about developing, redeveloping and subdividing in the Coliban Water region: Land Development Quick Guide - Developing.
You or your consultant can use an asset plan to locate existing water and sewer mains.
Specific Preliminary Servicing Advice can be requested by emailing landdevelopment@coliban.com.au with details of the proposal. Turn around time is typically 15 working days.
Step 1. Engage a registered consultant
Once you have determined that Developer Installed Works are required, you will need a registered consulting engineer (PDF 85KB) to manage survey, design, construction and building administration works on your behalf.
The Registered Consultant will then undertake a preliminary design and apply to Coliban Water for the works to proceed.
Step 2. Receive a Draft Deed and Letter of Conditions
Once we have received the preliminary design, we will issue you a Draft Developer Deed and a Letter of Conditions that states construction requirements.
See our Developer Deed FAQs for clarification on the introduction of Developer Deeds.
If you need your Letter of Conditions within 10 business days, complete the High Priority Mains Extension Response form online. A high priority fee applies.
Further documentation can be found here: Registered Consultant resources
A verified design submitted from the registered Consultant and an executed Deed of Agreement must be received before construction can commence.
Step 3. Complete on-site construction
Complete on-site construction, starting no less than five days after a construction notification form is submitted by the Registered Consultant.
Step 4. Arrange an inspection
Once construction work is complete, the Registered Consultant will contact us to arrange an inspection audit. We inspect new assets to make sure they meet requirements prior to issuing a Certificate of Practical Completion.
To fast track the final inspection, apply for a High Priority Mains Extension Practical Completion Inspection.
We will then attend the site and complete a Practical Completion final inspection within 2 full business days after receipt of your application. A priority fee applies.
Step 5. Handover to Coliban Water
Ongoing management of new assets will transition to Coliban Water and we will look after all future maintenance. A 12-month defects period is in place from the date of Practical Completion, in which Coliban Water may serve a Defects Notice.
Last updated on 28 May 2025