There are two ways of getting accepted for the granny flat, one through the local council’s traditional development application (DA) process. Or if it meets all the requirements of affordable rental housing SEPP(ARHS) 2009, you could have used a private certifier to allow the construction via a compliant development certificate(CDC). Granny flat solutions:- At over 13 prizes under their belts, they are now the only multi-award-winning granny flat company. They have been active in accommodating and securing granny flat approvals – DA approvals in Sydney for many boards and specializing in CDC approvals.

Complying Development Certificate (CDC)

In 2009, SEPP, an initiative to increase the number of second homes across Sydney, was launched by the NSW state government to simplify the approval process. They developed a set of unique requirements for each dwelling in order to accomplish this goal, and if the design meets each of the criteria, a private permit has the power to enact the construction within 14 days of lodging, without any need to lodge a DA through the local council.

In order to obtain approval by the CDC, the regulation includes issues such as property sizes, lot width, floor areas, building heights, setbacks, landscaping ratios, and many other specifications that the property must meet. Private certifiers are bound by the ARHS rules and are unable to alter any controls. A DA is required for any variation of these controls.

Site Requirements

The expert authorization team prepares and submits all the applications and documentation needed to the personal certifier to save your time and hassle, and gain approval for the new granny flat.

The NSW government issued an Affordable Homes National Environment Planning Policy in 2009 that requires all residential homeowners with properties greater than 450 square meters to build a granny flat on their land if the property is deemed to be compliant. It is a tiny house constructed in the backyard of a home that already exists.

Homeowners who wish to build a granny flat in their backyard are no longer required to seek permission from the Government as such as their request exceeds the required criteria for construction compliance set out.

If your property does not meet all the requisite requirements, the granny flat will be approved by submitting the application form for the renovation that can be accepted by the local council. This whole procedure could be taken good care of by your project manager and you can request all applications and documentation on your behalf.

Development Applications (DA)

When you do not complete all the goals mentioned in the ARHS, it does not mean that a granny flat can not be constructed. For authorization, you still can apply a DA to the town authority. This is a procedure that is slower and more expensive than a CDC proposal, but most councils normally consider granny flats and are likely to support a development if it meets most of the goals.


In only certain cases, governments have the power to allow minor deviations from the ARHS. Many councils have their own laws and guidelines on granny flat developments. In certain cases, you might be able to create a slightly larger house, reduce the setback of the building, or raise the height of the building. Such cases will still be at the discretion of the local council.


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