What Goes in a Renovation Scope of Works | NZ Guide

Three renovation companies walk through the same house. Three prices come back, and they're nowhere near each other. The usual conclusion is that one mob is expensive and one is sharp. Far more often, all three priced a different job, because nobody handed them the same one to price.

A renovation scope of works is the document that fixes that. It's a written list of everything being built, removed, replaced and left alone, with enough specification attached that two strangers reading it would order the same materials. Not the quote, and not the contract. It's the thing both of those get built on top of, and on most Auckland renovations it's the one document nobody writes.

So this is the homeowner's version. Where the detail has to sit, which lines you genuinely can't fill in yet, what older Auckland housing stock does to the whole exercise, and how to read three prices once they land. All of it happens before anyone gives you a number. The legal side of what you eventually sign is covered separately, linked below, and the rest of our renovation guides sit at superiorrenovations.co.nz.

Why three Auckland renovation prices are never the same number

Ask three companies to price "a new bathroom" and you've described a room, not a job. One team assumes the layout stays put and the plumbing doesn't move. Another assumes you want the toilet on the opposite wall. One allows for a standard acrylic shower tray; another for a tiled base with a linear drain and custom glass. Every one of those assumptions is defensible, and every one lands somewhere different on the invoice.

Same thing at whole-house scale, only louder. Does "repaint throughout" include the ceilings? The wardrobe interiors? The garage? Is the existing GIB being stopped and skimmed, or replaced? Nobody's being sneaky here. With no scope in the room, each company fills the gaps with its own defaults, and the cheapest quote is usually just the one with the thinnest ones.

There's a legal edge to it too. Consumer Protection is blunt about the two kinds of price: an estimate is the provider's best guess based on skill and past experience and isn't a fixed price, while a quote is an offer to do a job for a specified price that can't rise unless you agree to extra work or the scope changes mid-job. Both definitions point at the same thing. A price can only be as fixed as the scope it was built from.

What a scope of works is, and what it isn't

Four documents get muddled together in renovation conversations. Keeping them apart is most of the battle.

The scope, the specification, the quote and the contract

The scope says what's happening. The specification says with what. The quote says how much. The contract says what happens when reality disagrees with all three. A scope line reads "replace the bathroom vanity". The specification line underneath names the width, the carcass, the door finish, the handle, the benchtop and the basin. Without that second line, the first one is a wish.

Building Performance guidance sets out the minimum content a residential building contract has to cover in New Zealand, and a description of the work, materials and products is part of it. That requirement is only ever as strong as the description you hand over. Our own walk-through of what actually has to be in a renovation contract in New Zealand covers the full list, the paperwork you should be given before signing, and how variations are meant to reach you. Read it once the scope exists, because the contract is where a good scope gets its teeth.

If the vocabulary is where you're getting stuck, the renovation words that turn up in every quote are worth twenty minutes first. Half the confusion at this stage is terminology, not judgement.

"People think the scope comes after the price, and it's the other way round. When someone asks me for a number in the first meeting, what I actually hear is that we haven't decided what we're building yet. I'd rather spend two more weeks writing down exactly what goes where and then give a price I can stand behind, than hand over a fast number that quietly changes four times." — Dorothy Li, Design Manager

Write it room by room, at line-item level

Scope documents fail by being too general. Almost never by being too specific. The useful test is whether someone who has never met you could order the materials off your description. If a line needs a phone call to interpret, it isn't finished.

A real specification, line by line

A contemporary grey bathroom we finished in Wattle Downs in October 2024 for Steve and Jennifer was specified down to the individual product before a tool came out of the van. Artisan matte Travertine Grey 600x600 tiles from The Tile Depot. A custom tiled shower with a recess and custom glass. Gunmetal Waterware tapware throughout, an 1800mm custom vanity with Charred Oak fronts and brushed nickel hardware, a Sparkling White 30mm Uniquartz benchtop, a Posh Solus freestanding bath at 1700x800 from Reece, and a Vivo toilet.

Read that back and notice what it removes. No argument is available about which grey, which tapware finish, or whose bath. Every line there is a decision that would otherwise have surfaced mid-build as a question, and mid-build questions are how a fixed price stops being fixed. Dorothy designed that room. The specification is why the room that got built is the room that was drawn.

The four columns that end most arguments

You don't need software. A table with four columns handles a single room and scales to a whole house.

• Item — the element, one line each. Shower mixer. Not "tapware".
• Specification — brand, range, model, size, finish. Or an allowance figure if you genuinely haven't chosen yet.
• Who supplies — you or the contractor. This is the most common gap in homeowner-written scopes.
• Who installs — and who carries it if a client-supplied item turns up damaged or doesn't fit.

That last pair settles more disputes than the rest of the document combined. A client-supplied vanity that arrives 50mm wider than the gap is nobody's fault until the scope says whose it is.

Cabinetry is where specification detail earns its keep hardest, because two kitchens can look identical in a rendering and behave completely differently after five years of family life. Our sister team at Little Giant Interiors has written up which cabinet materials actually behave differently in use, and it's worth a read before you write "custom cabinetry" on a line and move on.

"The selections are the scope, as far as I'm concerned. I've had clients hand me a mood board and a budget and expect me to bridge the two, and you can't, not honestly. Pick the actual tile. Pick the actual handle. Once it's written down with a product code beside it, the price is real and the room in your head is the room you get." — Alison Yu, Designer

The lines you can't fill in yet, and how to shrink them

Some lines genuinely can't be pinned before work starts. That's normal, and pretending otherwise is how people end up with a low quote and a bad year. The trick is knowing which kind of gap you're looking at.

An unmade decision is not an unknown condition

An allowance covers something you haven't chosen. A provisional sum covers something nobody can see. Tiles you haven't picked are the first kind, and you can close that gap on Saturday morning by going and picking tiles. What the framing looks like behind a 1990s shower lining is the second kind. No amount of decisiveness closes it.

Both belong on a scope. What causes trouble is not knowing which of your own lines are allowances, because those are precisely the ones that will move. If you're chasing cost bands at this stage, the Superior Renovations free calculators that put a range around each part of the job will get you closer than a guess, without inventing precision that doesn't exist yet.

Four investigations that turn an unknown into a fixed line

Each of these can happen before pricing, and each one drags a provisional sum toward a real number.

1. Open a small area of lining. One deliberate hole in the right place, patched afterwards, tells you more about framing condition than any amount of speculating from the hallway.
2. Get under the house and into the roof space. Subfloor and ceiling access answers the questions about piles, bearers, wiring, insulation and drainage runs that otherwise sit in a scope as a shrug.
3. Commission an asbestos assessment on pre-2000 materials. Textured ceilings, vinyl, some linings and some soffits are all candidates. That's work for a licensed asbestos professional, and it belongs before pricing rather than after a demolition crew finds something.
4. Have a moisture check done on plaster-clad homes from the late 1990s and early 2000s. Weathertightness on that stock is a specialist assessment, not a visual guess, and the result can change the shape of an entire renovation.

None of it is expensive next to the certainty it buys. Whether any of the resulting work needs consent, or counts as restricted building work, is a question for Auckland Council or a Licensed Building Practitioner rather than a blog.

What older Auckland housing stock does to a scope

The same brief produces a very different scope depending on what the house is made of. Auckland's stock changes street to street, and this is exactly where a generic template falls over.

Villas and bungalows

On a Grey Lynn villa or a Mt Eden bungalow, expect lines that don't exist on newer homes: matching existing profiles, scribers and architraves, levelling floors that have settled, making good where a century of previous work has been layered up. On a character do-up the making-good lines are often bigger than the new-work lines, and they're the ones most often left off entirely. Where a wall is coming out, the structural side needs drawings behind it. Sonder Architecture's write-up of the architectural design process behind a renovation covers what that documentation actually involves.

Post-war weatherboard and brick-and-tile, 1950s to 1970s

Papakura, Titirangi and a good chunk of the isthmus are full of these. The scope questions are usually about services rather than structure: original wiring, galvanised pipework, a single-glazed aluminium window retrofit from the 1980s, insulation that either isn't there or has compacted flat. Decide upfront whether services are in or out, because "while you're in there" is the most expensive sentence in renovating.

Plaster-clad homes from the late 1990s onward

Around Albany, Greenhithe and plenty of newer subdivisions, monolithic plaster cladding from that era carries weathertightness risk that has to be assessed rather than assumed. On this stock, write the scope in two parts: the renovation you want, and a clearly separated allowance for whatever an assessment turns up behind the cladding. Keeping them apart stops one quietly eating the other.

Apartments and townhouses

Here the constraints come off the title as much as the building. Body corporate rules, permitted work hours, lift bookings, waste removal routes, what counts as common property. All of it shapes what can physically be scoped. Get those rules in writing before the scope is written, not after it's priced.

The items homeowners leave out, and the variations they cause

Nearly every scope written by a homeowner covers the visible work well and the invisible work not at all. These are the lines we most often have to add.

• Make-good — patching, stopping and painting where new work meets old, including the room next door that shares the wall.
• Disposal — skips, tip fees, and where a skip physically goes on a narrow section.
• Temporary services — a working toilet, a temporary kitchen, power and water while a room is out of action.
• Protection of what stays — floors, joinery, that timber staircase everyone will walk past forty times a day.
• Access and parking — deliveries, crane or hiab requirements, and whether a bath can physically get up the stairs.
• Final clean — builder's clean, versus the clean you'd actually move back in after.

A written specification also protects you when a supply chain lets everyone down. On a full-home renovation we finished in Mellons Bay in November 2022, the scope ran to a new kitchen, four bathrooms, walk-in wardrobes, a laundry, a Kwila deck, double glazing throughout, a re-roof, a full repaint, a rewire and garage doors, across roughly a six-month build. Mid-build the glazing supplier failed on more than twenty double-glazed windows and skylights, and because the performance and finish were specified rather than assumed, we could change suppliers without the standard dropping. A vague line would have turned that into a downgrade instead of a substitution.

How to hand the same scope to three companies and read what comes back

Once the document exists, a real comparison finally becomes possible. Send the identical scope to everyone and ask for the price broken down against your line items, not presented as one figure.

The most useful thing in a returned quote is where the company disagreed with your scope. A team that comes back having added the make-good you forgot, flagged that your tile allowance is light and asked who's supplying the tapware has read the thing properly and is pricing the real job. A team that returns your exact list at a lower number has usually accepted assumptions that won't survive demolition.

Three things worth checking on every response. Which of your lines got treated as allowances. Whether any line quietly disappeared. Whether the sequence they describe makes sense for a house you might still be living in. The company asking the most uncomfortable questions now is generally the one whose price moves least later.

This stage is what the Superior Renovations design team is built around, and it's why our price arrives late in the process rather than early. You can see how our design-to-build process turns a wish list into a documented scope, and what the renovation work we take on across Auckland covers at whole-house scale.

Renovation scope of works FAQs

What is a scope of works for a renovation?

It's a written list of every element being built, removed, replaced or retained on a renovation, with a specification attached to each line. It sits before the quote and before the contract, and it's what makes two prices genuinely comparable. Without one, each company prices its own assumptions.

Who writes the scope of works, the homeowner or the builder?

Either, and the best ones get written together. A homeowner can draft the rooms, the outcomes and the selections; a designer or builder adds the make-good, the services and the sequencing most homeowners wouldn't think of. What matters is that one agreed version exists before pricing starts.

How detailed should a renovation specification be?

Detailed enough that someone who has never met you could order the materials. Brand, range, size and finish for every fitting and surface. If a line needs a phone call to interpret, it isn't finished, and that call will happen eventually at the least convenient moment.

What is the difference between an allowance and a provisional sum?

An allowance covers an item you haven't chosen yet, such as tiles or tapware, and you close it by making the decision. A provisional sum covers work whose extent nobody can know until demolition, which on older Auckland homes usually means whatever is behind the linings.

Can a scope of works stop variations happening?

Not entirely, because existing buildings hold surprises. What a good scope does is cut the number of variations that are decisions rather than discoveries, and make the remaining ones straightforward to price fairly. How variations must be agreed is set out in your contract, so read that clause before you sign.

A renovation scope of works isn't paperwork for its own sake. Writing it is how the renovation actually gets decided, and the price is just the arithmetic that follows. The households who find this stage tedious tend to be the ones who enjoy the build, because the arguing happened on paper in a warm room instead of on site in week seven.

If you'd rather not draft it on your own, sit down with the Superior Renovations design team and walk through your scope. Bring photos, a rough plan and your list of must-haves to the showroom at 16B Link Drive, Wairau Valley, and we'll tell you which lines are solid, which ones are still wishes, and what needs looking at before anybody writes a number.

References

1. Consumer Protection NZ — Quotes and estimates: the difference between a quote and an estimate, and when a price can change.
2. Building Performance (MBIE) — Contracts for your building project: the minimum content a residential building contract must cover.