Outdoor Renovation Order of Trades in New Zealand: The Right Sequence

Last updated: 30 June 2026 · By Mossy Tariq, Founder — Property Blueprint Co.

An outdoor renovation in New Zealand fails in a way an indoor one rarely does: in the ground, before anything visible is built. The order of trades for an outdoor renovation is not a matter of preference or convenience — it is a chain of physical dependencies where each trade needs the previous one's work finished, level, and signed off before they can start. Get the sequence right and the project moves cleanly. Get it wrong and you are paying a concreter to break up a slab a drainlayer should have run a pipe under first.

That gap — between the homeowner who books trades in the order they become available and the homeowner who books them in the order the work demands — is where outdoor budgets quietly blow out. The trades are not the problem. Most of them will do exactly what you ask, in the order you ask, and present an honest invoice for the rework when the sequence forces it. The prepared homeowner sees the sequence the trade sees; the unprepared one pays the variation for reversing it.

An outdoor renovation is built from the ground up, and the order of trades is the ground — reverse it and every later trade inherits the mistake.

This article sets out the correct order of trades for a New Zealand outdoor renovation — deck, paving, fencing, landscaping, and the services beneath them — the dependencies that make the order non-negotiable, and what each reversal costs. The sequence below is the one a competent builder or landscaper runs; the value of seeing it written down is being able to run it yourself before the first trade arrives on site.

Why the order of trades decides an outdoor renovation's budget

Because outdoor work is layered, and every layer buries the one beneath it. A deck sits on footings that sit on ground that may need to be cut, filled, and drained first. A paved courtyard sits on a compacted base that sits on services — stormwater, irrigation, the conduit for outdoor lighting — that have to be in the ground before the base goes down. Once the visible layer is finished, the layer beneath it is sealed, and reaching it again means demolishing what was just built.

Indoor renovations forgive a little out-of-sequence work because most services run inside accessible wall and floor cavities. Outdoor renovations do not forgive it, because the services run under concrete, decking, and turf, and there is no cavity to open. A forgotten drainage line under a new patio is not a wall you cut into — it is a slab you remove. This is why the cost of an outdoor renovation in New Zealand is so sensitive to sequence: the same scope, built in the wrong order, can cost thousands more in demolition and rework than it should.

The density of trades makes it worse. An outdoor renovation can involve a surveyor or designer, an excavation contractor, a drainlayer, a concreter, a carpenter, a registered electrician, a fencer, and a landscaper — each dependent on the one before. A single trade booked early, before its predecessor has finished, stalls the whole chain or forces the predecessor to work around finished work, which they price accordingly.

What is the correct order of trades for an outdoor renovation in New Zealand

Every deck, patio, courtyard, and full backyard renovation moves through these stages in this order. The sequence is driven by physics, not habit: each stage prepares the ground the next one is built on, and skipping ahead means coming back to do the skipped stage on top of finished work.

1. Design, consents, and resource-consent check. Finalise the layout and confirm what needs a building consent and what triggers a resource consent under the district plan, before any trade is booked. A deck you can fall more than 1.5 metres from needs a building consent; site coverage, setbacks, and height-to-boundary rules can require resource consent independently.
2. Earthworks and excavation. Cut, fill, and level the ground to the finished design levels, including any retaining the levels require. Everything downstream is set out against these levels, so they are fixed first and checked before services go in.
3. Drainage and services. The drainlayer lays stormwater and any subsoil drainage, and conduits for irrigation and outdoor power go in while the ground is open. This is the stage most often skipped and most expensive to retrofit, because it runs beneath everything built after it.
4. Concreting and footings. The concreter pours footings for decks and structures, and slabs for patios and paths, onto the prepared and drained base. Footings set the structural datum for the carpenter, so they cure before framing starts.
5. Carpentry and decking. The carpenter frames and builds the deck or pergola on the cured footings, to NZS 3604 timber-framing requirements where the structure relies on it for Building Code compliance.
6. Electrical. A registered electrician connects outdoor lighting, power points, and any pump or spa circuit using the conduits laid at the services stage — first fix before surfaces close, final fix after.
7. Fencing and barriers. Boundary fences, screens, and any pool barrier go in once levels and structures are set. A pool barrier is governed by the Building Act and must be built and certified before the pool is filled, not after.
8. Landscaping and finishes. Paving infill, turf, planting, and soft landscaping go in last, over a site where every buried service and structure is already in place and signed off.

Work alongside the outdoor renovation checklist to track each phase.

Which dependencies between trades break a project when reversed

Most of the sequence is intuitive once you see it, but four dependencies are the ones that, when reversed, turn a clean project into a remediation. They are worth understanding as mechanisms, not just rules, because the mechanism is what tells you why the order cannot bend.

The first is drainage before any hard surface. Stormwater pipes, subsoil drains, and conduits run under decks, patios, and paths. If the concreter pours before the drainlayer runs the lines, the lines have to be cut into a finished slab — a job that costs many times the original, and that may compromise the slab. The drainlayer goes in while the ground is open, full stop.

The second is footings before framing. A deck frame is built to the footings, and the footings carry the load to ground that earthworks prepared. If a carpenter frames before footings have cured, or onto footings poured on unprepared ground, the structure can move, and a deck that moves is a deck that fails inspection or fails in service. The concreter's work has to be cured and correct before the carpenter starts.

The third is services-conduit before surfacing. Outdoor lighting and power need conduit in the ground before the surface goes over it. An electrician can pull cable through conduit at any time; nobody can run new conduit under a finished patio without lifting it. The cheap moment to lay conduit is when the trench is already open for drainage — which is why electrical first-fix is planned alongside the services stage, even though final connection comes later. The most common outdoor renovation mistakes in New Zealand almost all trace back to a buried service that was not planned before the surface above it was laid.

The fourth is barrier before pool fill. A residential pool barrier is a legal precondition, not a finishing touch. The barrier has to be built and certified before the pool holds water, because the obligation under the Building Act is to restrict access from the moment the pool is capable of holding it.

What does going out of sequence actually cost

Out-of-sequence work is the most expensive work in an outdoor renovation because it is paid for twice: once to build the thing that is in the way, and again to remove and rebuild it. The cost is not a percentage premium on a line item — it is a whole new line item that should never have existed.

The numbers make the point. A timber deck in New Zealand starts from around $450 per square metre installed for softwood, with composite from roughly $575 and hardwood from $650, according to New Zealand decking cost data. If a drainage line is forgotten and a 20-square-metre deck has to be partially lifted and relaid to reach it, the rework can run into thousands — on a line item that drainage planning would have cost a few hundred dollars to avoid. The same logic applies to a paved courtyard cut open to retrofit a conduit, or a fence relocated because a boundary or setback was not checked before it went in.

The second cost is time, and time on an outdoor project is exposure to weather. Every reversal that sends a trade back to redo work extends the period the site is open, and an open site in a New Zealand winter is a site where rain undoes earthworks and delays pours. Sequence is not only about money; it is about getting the buried and structural work closed in before the weather turns.

The third cost is the relationship, and it is the one homeowners underestimate. A trade asked to work around another trade's finished work, or to come back and redo their own, is a trade whose goodwill and price both move in the wrong direction. The well-sequenced project is the one where each trade arrives to a site that is ready for them — and prices it as the straightforward job it is.

Where do consents sit in the sequence

Consents sit first — before earthworks, before any trade is booked — because they determine what can be built and where, and getting them after work has started is the most expensive way to discover a problem. How many weeks each consent adds, and how the season stacks on top, is set out in the outdoor renovation timeline. New Zealand runs two separate consent systems for outdoor work, and an outdoor renovation can need one, both, or neither.

A building consent covers the structure. A deck or platform you can fall more than 1.5 metres from requires a building consent; below that height it may be exempt, though a safety barrier is still required by Building Code clause F4 wherever the fall is one metre or more. The Ministry of Business, Innovation and Employment publishes the exemptions, and the safe default is to check whether you need a consent with your council before building rather than after.

A resource consent is separate and covers planning rules — site coverage, yard setbacks, height in relation to boundary, and permitted activities under the district plan. A deck that is exempt from building consent can still need a resource consent if it breaches a setback or coverage rule, and the two are assessed independently. Boundary fencing carries its own framework under the Fencing Act 1978, which governs how the cost of a shared boundary fence is divided between neighbours. A residential pool barrier is governed by the Building Act 2004 and Building Code clause F9, which since 2017 requires every pool capable of holding 400 millimetres or more of water to have a compliant barrier, inspected periodically. None of these is a finishing decision — they are all phase-one decisions that set the boundaries the rest of the sequence runs inside.

How do you hold the sequence when running it yourself

You hold the sequence by booking trades against dependencies, not against availability. The temptation, especially when running an outdoor renovation around a job, is to book whoever is free when you call. The discipline is to book each trade only once its predecessor's work is finished and verified — which means knowing the dependency map before the first call is made.

The practical mechanism is a written sequence with a sign-off gate between each stage: earthworks signed off to levels before the drainlayer starts, drainage signed off and photographed before the base goes down, footings cured and checked before the carpenter frames, barrier certified before the pool fills. Each gate is a document or a photo, and if the document for a stage does not exist, the next trade does not start. This is the same operating discipline that runs an indoor renovation through the twelve phases of a renovation — the outdoor sequence is shorter, but the principle that sequence dictates cost is identical.

That is the difference between the prepared homeowner and the unprepared one, played out in the backyard. The prepared homeowner arrives with the sequence mapped, the consents resolved, and a sign-off gate at every stage, and the trades price a clean run. The unprepared homeowner books in availability order, discovers the buried-service problem at the paving stage, and pays for the slab twice. The sequence is the cheapest insurance in the whole project, and it costs nothing but the discipline to hold it.

If the cost baseline is the right first step, use the free Renovation Cost Calculator — a trade-by-trade estimate for the specific outdoor renovation, in under 5 minutes, before any trade has quoted.

Frequently asked questions

What is the correct order of trades for an outdoor renovation in New Zealand?

The correct order is: design and consents, earthworks and excavation, drainage and services, concreting and footings, carpentry and decking, electrical, fencing and barriers, then landscaping and finishes. The sequence is driven by physical dependencies — each stage prepares the ground the next is built on. The most critical rule is that all buried services and drainage go in before any hard surface is poured, because retrofitting them means demolishing finished concrete or decking.

Do I need a building consent for a deck in New Zealand?

A deck you can fall more than 1.5 metres from requires a building consent. Below that height it may be exempt from building consent, but a safety barrier is still required by Building Code clause F4 wherever the fall is one metre or more. A deck exempt from building consent can still need a resource consent if it breaches a district-plan rule such as site coverage, a yard setback, or height in relation to boundary. The safe step is to check with your council before building, not after.

Why does drainage have to go in before concreting?

Because stormwater pipes, subsoil drains, and service conduits run under decks, patios, and paths, and there is no cavity to reach them once the surface is poured. If the concreter pours before the drainlayer runs the lines, retrofitting drainage means cutting into or removing a finished slab — a job that costs many times the original and can compromise the structure. The drainlayer works while the ground is open, before any hard surface goes down.

What does it cost to fix an out-of-sequence outdoor renovation?

Out-of-sequence work is paid for twice — once to build what is in the way and again to remove and rebuild it. A forgotten drainage line under a 20-square-metre deck, where timber decking starts from around $450 per square metre installed, can turn a few hundred dollars of drainage planning into thousands of dollars of lift-and-relay rework. The cost is a whole new line item that correct sequencing would have prevented entirely, plus the added weather exposure of a site left open longer.

When does the pool barrier go in during an outdoor renovation?

The pool barrier is built and certified before the pool is filled, not as a finishing touch. Under the Building Act 2004 and Building Code clause F9, every residential pool capable of holding 400 millimetres or more of water must have a compliant barrier at least 1.2 metres high to restrict access by young children. The obligation applies from the moment the pool can hold water, so the barrier is sequenced ahead of filling and is inspected periodically thereafter.

Can I book outdoor trades in whatever order they are available?

No. Booking trades in availability order rather than dependency order is the single most common cause of outdoor renovation cost blowouts. Each trade needs its predecessor's work finished and verified — earthworks before drainage, footings before framing, conduit before surfacing, barrier before pool fill. Booking a trade before its predecessor has finished either stalls the chain or forces work around finished work, which is priced as the harder job it becomes.