Building a retaining wall near an easement in New Zealand is more complex than a standard retaining wall project. You'll need to consider building consent requirements, your local district plan, and the legal rights of whoever holds the easement — all before a single spade goes in the ground.
What Is an Easement and Why Does It Matter?
An easement is a legal right registered on a property's title that allows another party — such as a neighbour, utility company, or local council — to use part of your land for a specific purpose. Common examples include:
- Right of way easements (shared driveways or access strips)
- Utility easements (underground pipes, cables, or stormwater drains)
- Drainage easements (for council or private stormwater infrastructure)
If you build a retaining wall within or over an easement area, you may physically obstruct the easement holder's access or damage buried infrastructure. This can create legal liability and may require you to remove the wall at your own cost.
Checking Your Title and Easement Documents
Before planning any retaining wall near an easement, obtain a copy of your certificate of title from Land Information New Zealand (LINZ) and read the associated easement instrument carefully. The easement document will specify:
- The width and location of the easement strip
- What activities are permitted or prohibited within it
- Any setback requirements from the easement boundary
Your local council's GIS mapping tool or property file may also show easement locations overlaid on your site. If you're unsure how to interpret the documents, a surveyor or property lawyer can help.
When Do You Need Building Consent?
Under the NZ Building Code and the Building Act 2004, retaining walls are subject to consent requirements based on their height and the surcharge they retain. As a general guide:
- Retaining walls up to 1 metre in height (with no surcharge from structures, vehicles, or slopes above) may qualify as Schedule 1 exempt work — meaning no building consent is required.
- Walls over 1.5 metres, or those retaining a slope with additional loads above, will almost always require a building consent.
However, proximity to an easement can change this. Many councils apply additional scrutiny or require consent for any retaining work within or adjacent to an easement, regardless of height. Always confirm with your local council before assuming your project is exempt. You can find general guidance on exempt building work at MBIE Building Performance.
Easement Holder Consent
Even if your council grants building consent, you may also need written approval from the easement holder before building within or near the easement strip. For utility easements, this typically means contacting the relevant network utility operator (e.g., your local council's infrastructure team, Watercare, Vector, or similar). For right-of-way easements, you'll need agreement from the neighbouring property owner who benefits from the easement.
Building without this approval — even with a council consent — can result in legal disputes or forced removal of the wall.
District Plan Rules and Setbacks
Your local council's district plan may impose specific setback rules for structures near easements. These vary significantly between councils, so there's no single national standard. Some councils require retaining walls to sit a minimum distance (often 0.5–1.5 metres) from the edge of an easement. Others may prohibit permanent structures within the easement area entirely.
Check your district plan rules through your council's website or planning department. BRANZ also provides useful guidance on how the Building Code interacts with site-specific constraints.
Structural and Drainage Considerations
Retaining walls near easements — particularly drainage or stormwater easements — must not:
- Block or divert water flow through the easement
- Increase hydrostatic pressure on buried pipes or culverts
- Restrict access for maintenance of underground infrastructure
A qualified geotechnical engineer or structural engineer should assess the wall design if it is close to buried services or on unstable ground. Poor drainage behind a retaining wall is a leading cause of wall failure in New Zealand's wet climate, so adequate subsoil drainage and weepholes are essential regardless of easement proximity.
Restricted and Licensed Work
If your retaining wall project involves any of the following, licensed professionals must be engaged:
- Plumbing or drainage connections near the wall — restricted work under the Plumbers Gasfitters & Drainlayers Board
- Electrical cables running near or under the wall — restricted work under the Electrical Workers Registration Board
- Structural design for walls over 1.5 metres or on difficult ground — requires a licensed building practitioner or engineer; see Licensed Building Practitioners
⚠️ Safety note: Always dial 0800 4 BURIED (0800 4 287 433) or use the Beforeudig service to locate underground services before any excavation near an easement.
When to Call a Professional
You should engage a qualified retaining wall builder or structural engineer if:
- Your wall will be 1.0 metres or taller, or near a boundary or easement
- The site has poor drainage, fill material, or unstable ground
- You need to navigate easement holder negotiations or council consent applications
- The wall will support a driveway, building, or other surcharge load
A professional can also help you document the work correctly for your building consent application and ensure the finished wall complies with MBIE Building Performance requirements. You can find experienced local retaining wall builders on tradedirectory.co.nz.
Licensed Building Practitioner (LBP)
