Do I Need Council Consent to Add a Second Storey?

A second-storey addition is a great way to add space and increase your property’s value.

But before you go ahead, you need to know whether your project requires council approval under NSW planning laws.

At Town Planning Sydney, we help homeowners assess what’s possible, prepare accurate plans and lodge development applications that meet local council rules.

Here’s what you need to consider before building up.

1. Most second-storey additions need DA approval

In most parts of New South Wales, a vertical extension will require formal DA approval.

This is because the second level often affects height, setbacks, privacy and overshadowing.

Our planning consultants will confirm whether your site is eligible for a full DA or Complying Development.

In a recent project in Ryde, a two-bedroom second storey required full assessment under the LEP and DCP.

2. Check your zoning and height limits

Your property’s zone under the Local Environmental Plan determines the maximum building height.

R2 Low Density Residential, for example, usually allows up to 8.5 or 9 metres in height. We review zoning and floor space ratio early so we can design a compliant addition.

In Parramatta, we revised a roofline to stay within the 9-metre height control and secured DA approval without modification.

3. You must comply with setback and privacy rules

A second storey can trigger stricter side and rear setback rules, especially if windows overlook neighbouring homes.

We adjust layouts and include privacy screens to reduce overlooking risks.

Our team prepares shadow diagrams and privacy statements as part of your development application.

In Canterbury-Bankstown, we proposed frosted glazing and angled windows to pass council review.

4. You may need heritage or flood checks

If your property is in a conservation area or flood-prone zone, additional assessments apply.

This may include heritage impact statements or flood modelling reports.

In Marrickville, we supported a second-storey addition that maintained the original front façade to satisfy heritage controls. We worked closely with council officers to gain consent.

5. Accurate plans are essential for approval

We prepare DA-ready architectural drawings that align with NSW planning rules and council expectations.

This includes existing and proposed floor plans, elevations, roof plans and site analysis.

Because we combine drafting with town planning expertise, we avoid common errors that cause delays.

In Hornsby, our second-storey plans were approved on first submission after a fast six-week review period.

6. Council requests are common, we handle them for you

Even well-prepared DAs can receive requests for clarification or minor adjustments. We respond quickly and clearly on your behalf.

In Blacktown, council asked for updated driveway grades due to increased roof drainage. Our planner and drafter worked together to resolve it in two business days.

7. A planning consultant makes the process smoother

Building a second storey is a major investment, and delays cost time and money.

Working with a skilled planning consultant ensures your design meets both the vision and the rules.

Town Planning Sydney supports clients across NSW with expert planning advice, compliant designs and full submission support.