Eucalyptus robusta · Myrtaceae
Swamp Mahogany is a protected tree in effectively every council Pro Climbing Tree Services covers. Expect to need a tree permit, or a development application where the property is heritage listed or in a heritage conservation area.
Thick, soft, spongy red brown stringy bark over the whole trunk. Leaves are notably broad, thick and glossy compared to most eucalypts. Large ribbed buds and cylindrical gumnuts. Cream flowers through autumn and winter.
Low lying and damp sites near the coast, including parts of the Northern Beaches around Narrabeen, Warriewood and Ingleside, and pockets of the Eastern Suburbs and Bayside.
The habitat argument is the key issue. Swamp Mahogany is a listed winter food source for threatened fauna, so councils weigh removal carefully, particularly around the Warriewood and Narrabeen wetlands. Shallow rooting in wet ground can also make stump grinding and access more difficult.
Status below is for a tree on private land that has passed the council's size threshold. Heritage items, heritage conservation areas, significant tree registers, biodiversity mapping and conditions of development consent override every exemption shown here.
| Council | Status | What it means |
|---|---|---|
| Northern Beaches | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| Ku-ring-gai | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| Hornsby Shire | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| The Hills Shire | Confirm with Council | Council holds its species exemptions in a document rather than on its website, so confirm this species with Council before treating removal as exempt. Size thresholds apply in the meantime. |
| Blacktown City | Permit required | Council does not run a species exemption list. A permit is required once the tree passes the size threshold, and each tree is assessed on its own merits. |
| North Sydney | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| Willoughby | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| Lane Cove | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| City of Ryde | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| Hunters Hill | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| City of Sydney | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| Inner West | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| Woollahra | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| Waverley | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| Randwick | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| Bayside | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| Georges River | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| Strathfield | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
| Burwood | Confirm with Council | Council holds its species exemptions in a document rather than on its website, so confirm this species with Council before treating removal as exempt. Size thresholds apply in the meantime. |
| Canterbury-Bankstown | Permit required | Not on Council's exempt species list, so a tree permit is required once the tree passes the size threshold. |
It flowers in winter when little else does, which makes it a critical food source for the threatened Grey-headed Flying-fox. Councils in the Northern Beaches take that into account when assessing removal.
This encyclopedia is a practical guide for Sydney property owners, not legal advice. Council tree rules change, and exemptions are frequently overridden by heritage listings, heritage conservation areas, significant tree registers, biodiversity mapping, endangered ecological communities and conditions attached to development consent. Always confirm the current rules with your council for your specific address before any tree work begins, or ask us to check it for you.
Photo by Forest and Kim Starr via Wikimedia Commons, CC BY 3.0 us
Our arborists work across 20 Sydney councils every week. We will identify the species, check the rules for your address and handle the permit application if one is needed.
