Removing a tree near your house foundation is one of those jobs that looks straightforward but can quickly become dangerous or costly if not done correctly. Depending on the tree's size, species, and proximity to your home, you may be able to tackle smaller trees yourself — but for anything significant, hiring a qualified arborist is strongly recommended.
Assess the Risks Before You Start
Before touching a single branch, take stock of what you're dealing with:
- Tree size and lean: A tree leaning toward your house dramatically increases the risk of an uncontrolled fall.
- Root spread: Large roots can extend well beyond the canopy drip line and may already be affecting your foundation, drainage, or underground services.
- Proximity to structures: Trees within a few metres of your home, fences, power lines, or outbuildings require extra care.
- Underground services: Contact your local council or use a service locator to identify buried water, gas, and electrical lines before any digging or root cutting.
- Species: Some trees (like willows, poplars, and certain figs) have particularly aggressive root systems that can damage foundations, drains, and pipes.
If the tree is large (generally over 4–5 metres tall), leans toward the house, or is within falling distance of any structure, stop and call a professional arborist.
Do You Need a Building or Resource Consent?
In New Zealand, tree removal is often regulated at a local level. Many councils have Notable Tree schedules or District Plan rules that protect certain trees — removing them without consent can result in significant fines.
Check with your local council before proceeding. Some trees on private property may also be subject to covenants or heritage protections. As a general guide:
- Contact your council's planning or resource consent team.
- Ask whether the tree is listed or protected under your District Plan.
- Check whether any earthworks near the foundation require a building consent under the NZ Building Code.
For guidance on consent requirements, MBIE Building Performance is a useful starting point, though your local council has the final say.
Step-by-Step: Removing a Smaller Tree Safely
For smaller trees (under 4 metres, not leaning toward the house, well clear of power lines), a confident DIYer can manage removal with care.
1. Gather the Right Equipment
- Sharp handsaw or chainsaw (only use a chainsaw if you are trained and confident)
- Loppers and pruning saw for smaller branches
- Rope for directional control
- Safety gear: helmet, eye protection, gloves, steel-capped boots, and hearing protection
- Spade, mattock, and root saw for stump and root work
Equipment is available from Bunnings or Mitre 10.
2. Plan Your Felling Direction
Always plan a clear escape route at roughly 45 degrees behind and away from the intended fall direction. Never stand directly behind a falling tree.
3. Remove Branches First
Work from the bottom up, removing lower branches before tackling the upper canopy. This reduces weight and improves visibility.
4. Make Your Cuts
For the trunk, use the standard notch-and-back-cut technique:
- Cut a notch (open-face cut) on the side facing the intended fall direction — roughly 1/4 of the trunk diameter deep.
- Make the back cut on the opposite side, slightly above the notch's base.
- Leave a small hinge of wood to guide the fall direction.
5. Deal With the Stump and Roots
This is where foundation protection becomes critical. Do not simply cut roots close to the house without understanding the consequences:
- Removing large roots can destabilise the tree stump or, in some cases, cause soil subsidence near the foundation.
- Conversely, leaving a stump to rot can attract pests and fungi.
- Consider stump grinding (a service most arborists offer) rather than digging out large root systems manually near the foundation.
- For roots that have already penetrated drainage pipes, you may need a plumber or drainlayer — this is restricted work under the Plumbers, Gasfitters and Drainlayers Act and must be carried out by a licensed tradesperson registered with the PGDB.
Protecting Your Foundation During and After Removal
- Avoid heavy machinery directly against the foundation — vibration and soil compaction can cause cracking.
- Once the tree is removed, monitor the area for soil settlement over the following months, particularly in clay-heavy soils common in many NZ regions.
- If you notice new cracks in your foundation, consult a structural engineer or Licensed Building Practitioner (LBP).
- Fill any voids left by large roots with compacted fill or consult a builder about foundation repair if needed.
Safety Notes
Chainsaw use carries serious injury risk. WorkSafe NZ provides guidance on safe chainsaw operation. If you are not trained, hire a professional. Never work near power lines — contact your lines company to arrange a safe work zone or disconnection.
When to Call a Professional
Call a qualified arborist if:
- The tree is large, dead, diseased, or leaning toward your home.
- The tree is within falling distance of power lines, fences, or neighbouring properties.
- You suspect roots have already damaged your foundation, drainage, or underground services.
- The tree is listed or protected under your council's District Plan.
- You are not confident operating a chainsaw safely.
A professional arborist carries the right insurance, equipment, and expertise to manage complex removals safely. You can find qualified local arborists on tradedirectory.co.nz.
ISO 9001 / 45001 / 14001
Tōtika Prequalified
