If you’re thinking about adding a granny flat to your property in the Somerset Region, including Fernvale, Lowood, Esk, Kilcoy or Toogoolawah, don’t assume you automatically need a planning application.

The Somerset Region Planning Scheme changed in June 2026. One of the changes affects secondary dwellings, commonly called granny flats.

The change means some properties may no longer require a material change of use development application for a secondary dwelling.

That does not mean every granny flat in Somerset is now approval-free.

Your approval requirements still depend on the zoning of your property, the planning overlays affecting the land and whether your proposed development meets the relevant planning provisions.

What is a secondary dwelling?

The planning term generally used for a granny flat is “secondary dwelling“.

A secondary dwelling sits on the same lot as another dwelling and remains subordinate to the main dwelling.

It may be attached to the main house or constructed as a separate building.

This definition matters.

If your proposed second dwelling does not meet the definition of a secondary dwelling, Somerset Regional Council may classify the development differently. That can result in a different planning approval pathway.

Do you need a development application?

It depends on your property. A granny flat proposed on a residential property in Fernvale or Lowood may have a different approval pathway to one proposed on a rural property outside Esk, Kilcoy or Toogoolawah.

The first questions we recommend answering are:

• What zone is the property in?
• What overlays affect the land?
• Does the proposal meet the definition of a secondary dwelling?
• Does the proposed size and location meet the relevant planning provisions?
• Does the development trigger planning approval?

For some properties in the General residential zone, a compliant secondary dwelling may not require a separate material change of use development application.

Other properties may still require planning approval.

Your zoning is only part of the assessment

Somerset Region contains a mix of residential, rural residential, township and rural land.

Properties around Fernvale, Lowood, Esk, Kilcoy and Toogoolawah can also be affected by planning overlays.

Depending on the property, these may include matters such as:

• flooding;
• bushfire hazard;
• landslide hazard;
• biodiversity;
• catchment protection;
• agricultural land;
• infrastructure;
• heritage; and
• air transport.

This is why you should not rely on what happened with another granny flat nearby.

Two properties in the same part of Somerset can have different planning requirements.

The size of your granny flat matters

The planning provisions applying to secondary dwellings also deal with the scale of the development.

Before you commit to a floor plan, it is worth checking how the proposed size of the granny flat relates to your lot and zoning.

A building designer can prepare a granny flat that physically fits on your property.

That does not necessarily mean it complies with the Somerset Region Planning Scheme.

Check the planning position before paying for drawings

This is where we can assist. Before you engage a designer or spend money preparing detailed plans, we can review your Somerset property and proposed granny flat.

We can check:

• your planning zone;
• applicable overlays;
• whether your proposal is properly classified as a secondary dwelling;
• whether planning approval is required;
• the planning provisions likely to affect your design; and
• the best approval pathway where an application is required.

We regularly assess planning issues affecting properties throughout the Somerset Region, including Fernvale, Lowood, Esk, Kilcoy, Toogoolawah and surrounding rural areas.

The aim is to work out the planning pathway before you spend money designing something that may need to change.

Planning a granny flat in Fernvale, Lowood, Esk, Kilcoy or Toogoolawah?

If you’re considering a granny flat or secondary dwelling anywhere in the Somerset Region, send us the property address and some basic information about what you are proposing.

If you already have a concept plan, send that through as well.

We can review the planning scheme requirements and tell you where you stand before you move into detailed building design or a development application.

Knowing the planning position early can save you from redesigning the project later.