Big blocks, big trees, tight rules
St Ives has some of the largest residential blocks on the North Shore and some of the biggest trees standing on private land anywhere in Sydney. Forty-metre blackbutt and Sydney blue gum are ordinary here, growing out of deep shale soil in back gardens laid out in the fifties and sixties when a quarter-acre was small.
It also sits inside Ku-ring-gai Council, which runs the most restrictive tree regime in the region and pursues unauthorised removal. Before anything else happens on a St Ives tree, the permit position gets established.
Dalrymple-Hay and the endangered forest
Dalrymple-Hay Nature Reserve on Mona Vale Road is one of the best surviving fragments of Blue Gum High Forest, a community now listed as critically endangered. Remnant trees of that community are scattered through the surrounding streets on private land as well, and they attract the strongest protection in the council's toolkit.
If you have a very large blue gum, blackbutt or turpentine on a shale block at St Ives, the realistic starting point is that it stays and gets managed, not removed. That is not a bad outcome. Deadwooding and considered reduction pruning handles most of the risk these trees actually pose.
The bushland edge
The eastern and northern fringes run into Ku-ring-gai Chase National Park and the Garigal bushland, and those blocks are mapped bushfire-prone. The country there is sandstone rather than shale — Sydney peppermint, red bloodwood, scribbly gum and heath — and the tree work shifts toward fuel management close to the house, clearance from roofs and gutters, and removing dead standing material.
Owners often expect the 10/50 rule to let them clear. It largely does not here anymore. What is achievable is clearing accumulated deadwood and ladder fuels within an approved asset protection zone, which is a documented process rather than a weekend with a chainsaw.
Access
St Ives blocks usually have room, which helps. Where a driveway will carry a truck and a platform can reach the tree, costs come down noticeably compared with the gully suburbs. The complications are horse paddocks and soft ground around the Showground area after rain, long carries on deep blocks, and the sheer volume of timber a mature blackbutt produces — a single tree can be several tipper loads.
Ring (02) 9090 4915 and we will tell you where your tree sits before you spend anything. Nearby: Pymble, Gordon and Hornsby.
Frequently asked questions
How hard is it to get a tree permit from Ku-ring-gai?
Harder than almost anywhere else in Sydney. Ku-ring-gai Council's tree controls are among the most restrictive in New South Wales and the council enforces them actively, including on unauthorised removal after the fact. Applications for healthy, structurally sound trees are commonly refused, and replacement planting is routinely conditioned when consent is granted.
What is Blue Gum High Forest and why does it matter at St Ives?
It is a tall shale-soil forest of Sydney blue gum, blackbutt and turpentine that once covered the ridge and now survives in a handful of small remnants, including Dalrymple-Hay Nature Reserve at St Ives. It is listed as critically endangered, so trees forming part of a remnant — including on private land — carry protection well beyond ordinary council rules.
Can I clear around my house for bushfire safety?
Within limits, and not on the assumption that bushfire-prone mapping alone permits it. The 10/50 entitlement area was reduced in 2015 and much of Ku-ring-gai now falls outside it. Asset protection zone work under an approved bushfire management plan is a legitimate route. Check your address on the Rural Fire Service tool before booking a crew.