A fence is the one structure you never build entirely on your own land.
Almost every other landscaping decision on a property is yours alone to make. A boundary fence is different, because by definition it sits at the edge where your decisions meet a neighbour's, and in New Zealand that comes with a genuine legal and practical dimension that other landscaping elements don't carry — shared cost expectations, notification processes, and the simple fact that the existing fence line people have treated as the boundary for years is not always the same as the surveyed legal boundary underneath it.
That gap between the assumed boundary and the surveyed one causes more disputes than material choice or height ever does. A fence rebuilt a little off the true line, or a conversation about cost-sharing that never happens before work starts, can turn a straightforward replacement into a genuinely difficult neighbour relationship — one that, unlike most landscaping mistakes, can't simply be fixed by redoing the work later.
This page works through the boundary-specific factors worth resolving before choosing a material — surveyed position, shared cost, the neighbour conversation — and then the practical cost drivers and material comparison that follow once those are settled.
01 · Before choosing a material
Boundary-specific factors to resolve first.
Surveyed position
Existing fence lines are not always on the legal boundary — confirm the surveyed position before replacing or extending a fence. On older properties in particular, decades of incremental rebuilds can have gradually shifted a fence line away from where the title actually says it should sit.
Shared cost obligations
Boundary fencing between neighbouring properties commonly involves shared responsibility rules that affect both cost and process, and understanding these before requesting quotes avoids an awkward conversation after work has already started.
Neighbour interface
Notifying and discussing plans with an adjoining owner early reduces disputes over height, material and cost, and is generally far less effort than resolving a disagreement after a fence has already gone up.
Purpose
Privacy, security, pet containment and wind shelter each favour different heights and materials, and being clear on which purpose matters most avoids ending up with a fence that's technically fine but doesn't actually solve the problem it was built for.
02 · Cost drivers
Length, height and material grade set the price.
03 · Compare boundary treatments
Timber, aluminium and planted boundaries.
Timber fencing
CharacterWarm, adaptable, widely available
Best fitMost residential boundaries
ConsiderPeriodic maintenance
Aluminium/composite
CharacterLow-maintenance, consistent appearance
Best fitLong-term, low-upkeep briefs
ConsiderHigher material cost
Planted boundary
CharacterSofter, adds greenery over time
Best fitWider boundaries, less immediate privacy urgency
ConsiderTime to establish, ongoing shaping
04 · Worked scenarios
Two boundary situations.
Shared side boundary needing replacement
The existing fence is on the surveyed line and shared with a neighbour; discussing material and cost-sharing before work starts avoids later disputes, and getting agreement in writing — even informally — is worth doing regardless of how amicable the relationship currently is.
Rear boundary against a reserve
No adjoining private neighbour changes the shared-cost question, but any reserve-facing fencing may have its own council requirements to check, since public land boundaries can carry different rules from a standard private boundary.
05 · Before building a boundary fence
Confirm the practical basics.
- Check the surveyed boundary position, especially on older properties.
- Discuss plans with the adjoining owner before finalising material and cost.
- Confirm height limits that may apply near street frontages or specific zones.
- Clarify who is responsible for existing fence removal and disposal.
Fencing & boundaries: common questions
How do I find out where the legal boundary actually is?
A registered surveyor can confirm the surveyed position, and it's worth doing this before replacing or extending a fence on any property where the boundary hasn't been recently marked — particularly older sections where the fence has likely moved over decades of rebuilds.
Am I legally required to split fencing costs with my neighbour?
There are commonly recognised shared-cost expectations for boundary fencing between neighbouring properties in New Zealand, but the specifics depend on the situation — this is worth confirming rather than assuming either way before work is priced.
What happens if my neighbour won't agree to a fence I want to build?
Discussing the plan early and in writing is the best way to avoid this becoming a dispute — if agreement genuinely can't be reached, there are formal processes available, but most situations resolve through a straightforward conversation about material, height and cost before work starts.
Does a boundary fence need a building consent?
Most standard residential boundary fences don't require consent, but height, material and specific site factors can change this — confirm with your council if the planned fence is unusually tall or solid.
Sources & methodology
Designed to show its working.
Boundary fencing cost-sharing and height rules vary by legislation and council district plan. This page is general guidance; confirm specific obligations for the property before proceeding.