We’re the first to admit it: our line of work is one of those things most people don’t think about until they have to. Whether you’re building, designing, or upgrading - the same questions come up over and over again. Below are clear answers to the ones we’re asked most often.

 

1. Do I need an on-site wastewater system, or can I connect to sewer?

 

If your property isn’t connected to town sewer, you’ll need an on-site wastewater system.

Even if sewer runs nearby, connection isn’t always automatic. Councils look at distance, topography, cost, and feasibility. In many rural and semi-rural areas, on-site systems remain the only practical option.

 

If you're ever unsure before purchasing, sewer status can usually be confirmed by checking the contract for sale or Section 149 (planning) certificate, asking the selling agent directly, or confirming with council or the local water authority.

 

2. When do I need an on-site wastewater assessment?

 

You’ll usually need an assessment if you are:

• Building a new home

• Subdividing land

• Adding bedrooms or a granny flat

• Replacing or upgrading an existing system

• Buying or selling a rural property (especially if council compliance is unclear)

 

Councils require assessments to make sure wastewater can be treated and disposed of safely on your land, without risking health, waterways, or neighbouring properties.

 

3. What’s the difference between a septic system and an AWTS?

 

A traditional septic system relies mainly on soil absorption and has limited treatment.

An AWTS (Aerated Wastewater Treatment System) treats wastewater to a higher standard before it’s dispersed on site.

In many NSW council areas:

• Septic systems are no longer approved for new homes

• AWTS units are commonly required

• Older septic systems may still be legal but tightly controlled

The right system will depend on soil type, lot size, slope, setbacks, and council rules.

 

4. How much does an on-site wastewater report cost?

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Most on-site wastewater assessments typically fall in the $2,000–$2,500 range, depending on:

• Site conditions

• Soil testing requirements

• System complexity

• Council requirements

• Proximity to the assessor.

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With a more agile business model, our consultancy is able to price our wastewater assessments below or toward the lower end of this range, without compromising service, compliance or quality.

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What matters most, though, isn’t simply the cheapest report - it’s making sure the system is compliant, practical and approved by council the first time. This is what we pride ourselves on. 

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Experience also matters. While many consultants can propose a technically compliant system, an experienced assessor will also consider future installation and maintenance costs to ensure the solution is truly sustainable for the property.

 

5. How long does the process take?

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Typical timeframes look like this:

• Site visit: usually within a week of accepting a fee proposal

• Report preparation: around 10 business days

• Council assessment: This is dependent on Council’s processes.

 

 

6. What does council actually require?

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Councils require:

• A compliant site and soil assessment

• A system that meets current standards

• Appropriate setbacks from boundaries, waterways, and buildings

• Ongoing maintenance arrangements (for AWTS systems)

 

7. What happens during a site visit?

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A site visit is really straightforward and usually takes 1–2 hours.

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We typically:

• Walk the site

• Assess slope, drainage, and constraints

• Undertake or confirm soil testing

• Identify suitable system locations

In most cases, no heavy machinery is required. The client isn’t required, however it very welcome to be nearby.

 

8. What if my existing system is failing?

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Common signs include:

• Odours

• Ponding or soggy ground

• Slow drains

• Complaints from neighbours.

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Once a problem is identified, councils usually require action. Sometimes this means repairs; other times a full replacement is necessary. Acting early gives you more, and generally more cost-friendly, options.

 

9. Do I need ongoing maintenance or servicing?

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For AWTS systems, yes - ongoing servicing is mandatory. This usually involves:

• Regular inspections

• Servicing by an approved technician

• Records provided to council.

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For septic systems, maintenance is simpler but still important. Tanks may need pump-out every 5 years, depending on household size and usage.

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Regular maintenance protects your system, your property value, and ensures your system continues to meet council requirements.

 

10. Can you work directly with my builder, designer, or plumber?

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Yes - and it often makes things much easier for you.

We regularly coordinate with:

• Builders

• Designers and architects

• Plumbers

• Councils

This helps avoid redesigns, delays, and crossed wires during approvals.

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