Council Approval for Ancillary Development (Sheds, Carports, Studios & Outbuildings)
Ancillary development covers structures and uses incidental to a dwelling - garages, carports, garden sheds, cabanas, studios that stop short of being a habitable secondary dwelling, decks and pergolas. Many of these qualify as exempt development, meaning no approval is needed at all, but only where they satisfy strict size, height and boundary setback criteria. Exceed any one of those criteria and the structure moves into complying development or DA territory depending on its scale. A structure genuinely fitted out as a liveable secondary dwelling, with a kitchen, bathroom and bedroom, is a different land use entirely and needs its own approval.
Free consultation
- 1-2 weeks for exemption check; 3-8 weeks where CDC or DA applies
- From $1,200 + GST for an exemption check; from $1,800 + GST where a CDC or DA is needed
- Quoted fixed after a free scope check
Small structures, strict limits
Ancillary structures are the built form most homeowners assume needs no approval at all, and for a genuinely large share of garages, carports, sheds and simple studios, that assumption is correct. The catch is that exempt development criteria are precise rather than approximate - specific size, height and boundary setback figures that either your structure satisfies or does not. There is no partial credit.
Where the line actually sits
Exceeding any single criterion - a shed slightly too tall, a carport slightly too close to the boundary - does not make the structure prohibited. It moves the structure into complying development or a development application, depending on scale, which changes the timeframe and the documentation required but not necessarily the outcome.
The practical approach
We check the proposed structure against the exempt criteria for your specific site before anything is built. Where it fits, that is the end of the process. Where it does not, we advise on whether a small adjustment brings it back within exempt limits, or whether it makes more sense to proceed through complying development or a DA.
How it works
Structure and site check
2-3 business days
Proposed size, height and boundary setbacks checked against the exempt development criteria for your site.
Classification
1-2 business days
Confirming exempt status, or which pathway applies where a criterion is exceeded.
Documentation
1-4 weeks depending on route
Plans and any supporting material needed for a CDC or DA pathway.
Approval
3-8 weeks where applicable
Certification or council determination where required.
What we take off your hands
What EHUP handles
- Checking your proposed structure against the exempt development size, height and setback criteria
- Confirming whether a studio or cabana risks being classified as a secondary dwelling
- Preparing complying development or DA documentation where exempt criteria are exceeded
- Advising on adjustments that bring a design back within exempt limits, where practical
- Lodging whichever application the structure actually needs
- Managing council or certifier queries through to approval
What you don't have to deal with
- Building first and discovering a boundary setback or height limit was exceeded
- Fitting out a studio with a kitchen and bathroom without realising it becomes a different land use
Frequently asked questions
Do I need approval to build a garden shed or carport?
Often not, provided it stays within the strict size, height and boundary setback limits that define exempt development. These limits are specific and unforgiving - a shed that is slightly too tall or too close to a boundary loses its exempt status entirely, not partially.
What turns a studio into a secondary dwelling?
Fitting it out for independent living - a kitchen, a bathroom and a bedroom together is generally the threshold that reclassifies a studio as a secondary dwelling, which is a different land use with its own approval requirements and its own lot size and floor area criteria.
What happens if my structure exceeds an exempt limit?
It does not become automatically prohibited - it simply moves to a different pathway, either complying development or a development application, depending on how far it exceeds the exempt criteria and what else applies to the site.
Can I build a shed close to my back fence?
A boundary setback applies under the exempt development criteria, and it varies with the height and footprint of the structure. Sheds built hard against a boundary without checking this are one of the most common sources of a retrospective compliance issue.
Related services
Secondary Dwellings / Granny Flat
A secondary dwelling, commonly called a granny flat, is a self-contained dwelling on the same lot as an existing house, supported under the Housing SEPP and often eligible for the fast complying development pathway.
Single Dwellings
A dwelling house is the most common residential land use in NSW and is generally permitted with consent in the standard residential zones, unless your council's LEP specifically prohibits it on that land.
Swimming Pool
Swimming pools, and spas above a certain volume, are commonly exempt or eligible for the fast complying development pathway where they meet criteria on setback from boundaries, filter and pump noise, and location relative to easements or bushfire-prone vegetation.
Why clients choose EHUP
- 10+
- 250+
- 14
- 1
Not sure which approval you need?
Tell us the address and what you want to do. We'll help identify the appropriate planning pathway, whether it is exempt development, complying development or a full DA. Your first conversation is free.