The Sydney Granny Flat Checklist

Before you start planning your new granny flat, there are a few requirements that your property must meet in order for planning to be approved.

Conditions of Your Lot

You can’t build a granny flat on a lot that’s already been subdivided, so this is the first consideration to bear in mind. In addition, planning won’t be approved on a block of land that already includes a granny flat so if this is your second expansion you’ll have to reconsider your options.

Land Protection

Check with your local council to see if there are any heritage restrictions on your land as these can prevent new structures from being built. Similarly, you’ll need to make sure there are no environmental protections covering the area as these will also cause a problem.

Available Area

In order to be approved for the construction of a granny flat on your property, your block must be of a minimum 450m2 in area. In addition to this, there’s also a minimum frontage requirement for your block of 12m.

Council Rules

The most important information you’ll need to find out is whether your local council permits additional structures to be built on your land. In particular, your council will need to allow for 1 primary dwelling (your main house) and 1 secondary dwelling (granny flat) on your site.

Home Plus One Makes it Easy

If you’re looking at granny flat construction in the Sydney area, Home Plus One can make it easy! Our step by step process includes everything from design inspiration to council approval, construction, handover and post-build inspections. To make sure you tick all the boxes for a granny flat, simply talk to us!

To find out more about planning regulations that might affect you, or to make an enquiry about granny flat building call us now on 02 8626 6668 or visit our contact page for more ways to get in touch.



Review the following list to ensure you can be approved for the construction of a Granny flat at your Property.

Your lot is not subdivided

You don’t already have a granny flat on the property

You’re not on heritage or environmentally sensitive land.

Council permits 1 primary dwelling (Main House) & 1 secondary dwelling (Granny Flat) on the proposed site.

Minimum block size is 450m2.

Minimum block frontage is 12m.

A maximum 60m2 Granny Flat is permissible on your block.

If your property fulfills these prerequisites, you may be eligible for construction of a Granny Flat.