Many NZ landscapers do offer some form of guarantee on their work and the plants they supply, but there is no single industry-wide standard — so what you get depends heavily on the individual contractor. Understanding what to ask for, and what's reasonable to expect, can save you a lot of frustration down the track.
What Types of Guarantees Do Landscapers Typically Offer?
Landscaping guarantees generally fall into two categories:
- Workmanship guarantees — covering the quality of construction work such as retaining walls, paving, decking, irrigation systems, and drainage.
- Plant establishment guarantees — covering the survival and health of plants, trees, lawn, and turf supplied and installed by the landscaper.
Some landscapers bundle both into a single contract clause, while others treat them separately. A few offer no formal guarantee at all, which is a red flag worth noting.
Workmanship Guarantees: What's Reasonable?
For hard landscaping — paving, retaining walls, timber structures, and drainage — a 12-month workmanship guarantee is a common baseline in New Zealand. More reputable or experienced landscapers may offer longer periods, particularly for structural work.
Keep in mind that any landscaping work that involves building consent (for example, retaining walls over 1.5 m high, or decks over certain heights) must comply with the NZ Building Code. Work done under consent is subject to council inspection, which provides an additional layer of accountability. Always check with your local council whether consent is required before work begins — don't rely solely on the landscaper's advice.
For Licensed Building Practitioners (LBPs), certain restricted building work must be carried out or supervised by an LBP. You can verify a tradesperson's licence at lbp.govt.nz.
Plant Guarantees: What's Realistic?
Plant guarantees are trickier, because plant survival depends on many factors outside the landscaper's control — including your local climate, soil conditions, watering habits, and pest pressure. New Zealand's varied climate (from Northland's subtropical humidity to Canterbury's dry nor'westers) means plant establishment can be unpredictable.
That said, many landscapers will offer a 90-day to 12-month plant replacement guarantee, typically with conditions such as:
- The homeowner must follow a specified watering and maintenance schedule
- Plants must not have been damaged by the homeowner or third parties
- The guarantee may exclude plants lost to extreme weather events or drought
- Replacement is usually at the landscaper's discretion (same species or equivalent)
Always ask whether the guarantee covers replacement only, or also includes the labour to replant. These are very different things.
What to Look for in a Landscaping Contract
Before any work starts, get everything in writing. A solid landscaping contract should include:
| Item | What to Check |
|---|---|
| Scope of work | Detailed description of all tasks and materials |
| Plant species and sizes | Named species, pot sizes, or grades |
| Workmanship guarantee period | Duration and what it covers |
| Plant guarantee period | Duration, conditions, and what replacement means |
| Payment schedule | Deposit, progress payments, final payment |
| Dispute resolution | How disagreements will be handled |
Consumer NZ has useful general guidance on contractor contracts and your rights under the Consumer Guarantees Act 1993 (CGA). The CGA applies to most residential landscaping work and means services must be carried out with reasonable care and skill — regardless of whether a written guarantee is offered.
How to Protect Yourself Before Work Begins
- Get at least two or three written quotes and compare what each guarantee actually covers
- Ask for references from previous clients and follow them up
- Check if the landscaper is a member of Landscape Industry Association NZ (LIANZ) — members are expected to meet professional standards
- Don't pay the full amount upfront — a reasonable deposit (often 20–30%) is standard, with the balance on completion
- Document the site with photos before, during, and after the project
- Clarify maintenance responsibilities — some guarantees are void if you don't follow the landscaper's aftercare instructions
BRANZ provides research and guidance on building and construction standards in NZ that can be helpful background reading when assessing quality expectations.
Irrigation, Electrical, and Plumbing Elements
If your landscaping project includes irrigation connected to the mains water supply, this is restricted plumbing work and must be carried out by a licensed plumber or drainlayer registered with the Plumbers, Gasfitters and Drainlayers Board. Similarly, any outdoor lighting or electrical work must be done by a registered electrician — check the Electrical Workers Registration Board. Make sure your landscaper is using licensed subcontractors for these elements, and that the guarantee covers their work too.
Safety note: Never allow unlicensed people to carry out plumbing or electrical work on your property. It is illegal, potentially dangerous, and may void your home insurance.
When to Call a Professional
If a landscaping project involves any of the following, you should ensure you're working with a qualified professional — and ideally one you can find and verify:
- Retaining walls or structures that may require building consent
- Drainage work that connects to the stormwater or wastewater system
- Irrigation connected to mains water
- Outdoor electrical installations
- Significant earthworks or slope stabilisation
You can find qualified, local landscapers on tradedirectory.co.nz — always ask about their guarantee terms before committing.
Licensed Building Practitioner (LBP)
