I want to tell you about a conversation I have more often than I'd like.

A client calls me partway through a renovation — sometimes in tears, sometimes in fury — because something has gone wrong. The tiles aren't what they expected. The kitchen island is in the wrong position. The builder has charged them for a variation they didn't know they'd agreed to. The paint colour looks nothing like the sample.

And when I ask to see the documentation — the drawings, the schedules, the specifications — what I usually find is a collection of emails, a few screenshots from Pinterest, a quote from the builder, and a handwritten note from a showroom visit. That's not documentation. That's a recipe for exactly the kind of dispute they're now in. Good documentation is not glamorous. It doesn't make it onto mood boards or Instagram feeds. But it is, without question, one of the most important things that separates a renovation that goes well from one that doesn't.

What Documentation Actually Means

In the context of a residential renovation, documentation refers to the complete set of drawings, schedules, and specifications that describe — precisely and unambiguously — what is to be built, where, how, and with what materials.

It includes:

Architectural drawings — floor plans, elevations, sections, and details that show the spatial layout and construction of the project.

Interior design drawings — furniture layouts, joinery drawings, reflected ceiling plans, and finish schedules that describe the interior in detail.

Specifications — written descriptions of materials, finishes, fixtures, and fittings, including brand, model, colour, and size.

Schedules — organised tables that list every door, window, tile, fixture, and fitting in the project, with all relevant details.

A scope of works — a written description of everything the builder is contracted to do, and everything that is explicitly excluded.

Together, these documents form the contract set — the agreed description of what is being built. They are the reference point for every decision made during construction, and the basis for resolving any dispute about what was agreed.

Why Vague Documentation Costs Money

Every ambiguity in your documentation is a potential variation. And variations — changes to the agreed scope of work — are almost always more expensive than if the same work had been included in the original contract.

Here's why: when a builder prices a job, they price it based on what they know. If the documentation is vague — if it says "tiles to bathroom" without specifying the tile, the size, the layout, the grout colour, or the pattern — the builder will make an assumption. They'll price based on a standard tile at a standard price. When you later select a tile that's larger, more expensive, or requires a more complex installation pattern, the difference becomes a variation.

The same applies to joinery. If the drawings show a kitchen but don't detail the internal configuration of the cabinets, the builder will price a standard configuration. When you want soft-close drawers, pull-out bins, and a specific internal layout, those become variations.

Variations are not inherently bad — sometimes they're unavoidable. But variations that arise from incomplete documentation are entirely avoidable. And they add up. On a significant renovation, poorly documented projects routinely run 15-25% over budget, almost entirely due to variations that could have been avoided with better upfront documentation.

The Scope of Works: Your Most Important Document

Of all the documents in a renovation, the scope of works is the one that causes the most disputes when it's missing or inadequate.

A good scope of works is exhaustive. It describes every element of the work in enough detail that there is no room for misunderstanding. It specifies what is included and — just as importantly — what is excluded. It describes the standard of workmanship expected. It references the drawings and specifications that form part of the contract.

A poor scope of works is vague. It says things like "renovate bathroom" or "new kitchen" without describing what that means. It leaves the definition of "complete" open to interpretation. It doesn't address what happens when something unexpected is found (like asbestos or structural issues). It doesn't specify who is responsible for what.

When a dispute arises — and in a significant renovation, some form of dispute is almost inevitable — the scope of works is the first document everyone reaches for. If it's clear and complete, disputes are usually resolved quickly. If it's vague, they can become protracted and expensive.

Finish Schedules: The Detail That Saves You

A finish schedule is a document that lists every surface in the project — every floor, wall, ceiling, splashback, and joinery panel — and specifies exactly what material, colour, and finish is to be applied to it.

It sounds tedious. It is tedious. But it is also one of the most valuable documents in a renovation.

Without a finish schedule, the builder is making assumptions about what goes where. With a finish schedule, every surface is specified, and there is no room for error. If the wrong tile goes in the wrong room, the schedule is the reference point that proves it — and the builder is responsible for rectifying it at their cost.

Finish schedules also help you see the project as a whole. When you list every surface in every room, you start to see relationships and conflicts that aren't obvious when you're making decisions room by room. The floor tile in the bathroom — does it work with the floor tile in the hallway? The paint colour in the bedroom — does it work with the joinery colour in the wardrobe? A finish schedule forces you to make these decisions deliberately, rather than discovering conflicts during construction.

Joinery Drawings: Where the Money Is

Joinery — kitchens, wardrobes, bathrooms, laundry, built-in furniture — is typically one of the largest cost items in a renovation. It's also one of the areas where the gap between what clients imagine and what gets built is widest.

Detailed joinery drawings — showing the external elevations, internal configurations, materials, hardware, and dimensions — are essential for getting joinery right. They allow you to see exactly what you're getting before it's built. They allow the joiner to price accurately. And they provide the reference point for checking the finished product against what was agreed.

Without joinery drawings, you're relying on verbal descriptions and assumptions. And in my experience, what the client imagines and what the joiner builds are rarely the same thing.

The Role of Your Designer in Documentation

A good interior designer doesn't just help you choose finishes. They produce the documentation that ensures those finishes are specified correctly, coordinated with each other, and communicated clearly to the builder and trades.

At Findlay & Co., documentation is a core part of what we do. We produce detailed drawings, schedules, and specifications for every project — not because we enjoy paperwork, but because we know that good documentation is what protects our clients' investment and ensures that what gets built matches what was designed.

We also review the builder's contract and scope of works before our clients sign — checking for ambiguities, gaps, and provisions that could expose them to unexpected costs. And we're available during construction to answer questions, review variations, and ensure that the documentation is being followed.

What to Ask Your Designer

If you're working with an interior designer — or considering engaging one — here are the documentation questions worth asking:

• What drawings will you produce, and at what stage?
• Will you produce a finish schedule? A joinery schedule? A fixture and fitting schedule?
• Will you review the builder's contract and scope of works before I sign?
• How will you communicate specifications to the builder and trades?
• What happens if the builder deviates from the documentation during construction?

The answers will tell you a great deal about how seriously the designer takes documentation — and how well protected you'll be during construction.

Naomi Findlay is the founder of Findlay & Co., a boutique interior design practice specialising in biophilic wellness design. With a PhD in medical science and over 15 years of experience, Naomi designs spaces for how humans actually feel and live — not just how they look. Findlay & Co. offers in-person design services in the Hunter Region and online consultations Australia-wide.

Ready to renovate with confidence? Book a discovery call with Findlay & Co. to talk through your project.