Why containers are different
Perth councils often have a separate planning policy just for sea containers (also called shipping containers). They don't treat a container like a normal garden shed, so the shed size rules you may have read about don't simply apply. The City of Wanneroo, for example, says containers are not assessed as "outbuildings" under the R-Codes.
Two councils, two very different answers
| Situation | City of Cockburn | City of Wanneroo |
|---|---|---|
| Container kept on a normal home block | Not allowed, except while you build (see below) | Needs planning approval unless it meets the scheme and R-Codes standard rules |
| Storage while you build | Up to 18 months, with planning approval, one container at a time | Allowed without planning approval once a building permit is issued; remove within 14 days of finishing |
| Moving house | Not covered by the policy | Up to 7 days without planning approval |
| Rural or rural living lots | One container up to 6 m, with planning approval | Needs planning approval |
| On the verge | Up to 14 days, 6 m maximum, by request to the City | Covered by local laws, not this policy |
Conditions councils usually set
- Behind the house and screened from the street and neighbours
- Painted to match the house or the landscape, and kept in good repair
- Used for storage only (Cockburn rules out living, business or industrial use)
- Not in car parking bays or blocking access
- No refrigerated containers on home or rural lots (Cockburn)
Does it need a building permit too?
Often, yes, if it's set up and used as a building. Building and Energy says there are no special exemptions for prefabricated buildings, and councils can take action if one goes up without the right approvals. A container fitted out as a workshop, studio or room is the clearest case. Any power or plumbing must be done by licensed trades.
If you want to live or work in it, the rules get much stricter. Wanneroo says a container used for habitable purposes must meet all relevant laws, like any other home.
What to do
- Check your council's sea container policy (search "[your council] sea container policy").
- If it needs planning approval, apply for that first.
- Then check whether a building permit is needed for how you'll use it.
Not sure if a normal shed would be simpler? Try our shed size checker or read do I need a permit for a shed?