How to Write a Scope of Works
A scope of works is the document that defines exactly what work is included in a job, what is excluded, what materials and standards apply, who is responsible for what, and the program it will be delivered to — and it is the single biggest factor in whether a construction job avoids disputes and variations. This guide covers what a scope of works must include, how it differs from a specification and a Bill of Quantities, and how to write inclusions and exclusions that hold up once work is underway.
Key takeaways
- A scope of works defines exactly what is included, excluded and expected — vague scope is the leading cause of variation disputes on site.
- It differs from a specification, which sets out how the work is carried out, and a Bill of Quantities, which is the measured, itemised, priced version of the scope.
- Every scope should cover project description, inclusions, exclusions, materials and standards, responsibilities, program and milestones, and assumptions.
- Clear, specific inclusions and exclusions close the gaps that lead to unpriced “extras” once a job is underway.
- The scope and the priced estimate should always reference the same drawings and revision — My Trade Hub’s tender templates and tender preparation help keep them aligned.
What Is a Scope of Works, and Why Does It Matter?
A scope of works (SOW) is the document that sets out exactly what work will be carried out, to what standard, using what materials, and by when — it is the single reference point both the client and the trade or builder agree to before a price is locked in.
On a construction job, most disputes do not start with bad workmanship — they start with disagreement about what was actually meant to be included in the price. A scope of works exists to remove that ambiguity. If the scope is clear, both sides know exactly what has been priced, what has not, and who is responsible for what.
A well-written scope of works is what turns a verbal understanding or a rough email into an enforceable part of the contract. It sits alongside the drawings, the specification and the priced estimate, and it is usually the first document referred back to when a client asks for something extra or a trade claims a variation.
Scope of Works vs Specification vs Bill of Quantities
A scope of works, a specification and a Bill of Quantities (BOQ) all describe the same job from different angles, and confusing them is a common source of pricing gaps.
The scope of works defines the boundaries of the job — what work is included, what is excluded, and who is responsible for each part. The specification goes one level deeper, setting out how the work is to be carried out: the technical standards, finishes, brands and workmanship required (for example, AS 3600 for concrete, or a specific waterproofing membrane). The Bill of Quantities takes the scope and specification and turns them into an itemised, measured list of quantities, each priced against a rate.
- Scope of works — what is included and excluded, and whose responsibility each item is
- Specification — how the work must be performed, to what standard and with what materials
- Bill of Quantities — the measured, itemised quantities and rates that add up to the price
The Essential Sections of a Scope of Works
A scope of works does not need to be long, but it does need to cover a consistent set of sections every time, so nothing is left to assumption.
Most trades and builders structure a scope of works around the same core sections, in roughly this order:
- Project description — address, site conditions and a plain-English summary of the job
- Inclusions — every task, item and deliverable that is covered by the price
- Exclusions — work, items or conditions that are explicitly not covered
- Materials and standards — brands, finishes and the AS standards the work must meet
- Responsibilities — who supplies what, and who arranges permits, access, power and waste removal
- Program and milestones — start date, key stage dates and practical completion
- Assumptions — the conditions the price relies on, for example that existing services are as shown on the plans
Writing Inclusions That Actually Close Scope Gaps
An inclusion only does its job if it is specific enough that two different people would read it the same way.
Vague inclusions such as “supply and install kitchen” or “electrical as required” leave room for a client to expect more than was priced, and for a trade to argue less was intended. Every inclusion should name the item, the quantity or extent, and the standard it is measured against — tying it back to a drawing reference or specification clause wherever possible.
The clearer the inclusion, the less time is spent arguing about it once the job is underway.
Writing Exclusions and Assumptions That Protect Both Sides
Exclusions and assumptions are what stop a client being surprised by a variation invoice, and stop a trade absorbing costs that were never priced.
An exclusion states plainly what is not covered by the price — asbestos removal, making good to areas outside the work zone, or supply of a client-nominated item, for example. An assumption states the condition the price depends on — that existing wiring is compliant, that site access is unrestricted, or that soil conditions match the geotechnical report. If an assumption turns out to be wrong once work starts, that is the trigger for a legitimate variation, not a dispute.
| Scope Item | Included in Price | Excluded / Client Responsibility |
|---|---|---|
| Demolition | Strip existing fixtures, tiles and vanity | Asbestos testing and removal, if found |
| Waterproofing | Membrane to AS 3740 in wet areas shown on plan | Waterproofing outside the marked wet area |
| Tiling | Supply and lay floor and wall tiles to an allowance of $60/m² | Tiles selected above the stated allowance |
| Fixtures | Install client-supplied vanity, toilet and tapware | Supply of vanity, toilet and tapware |
| Make good | Patch and paint walls disturbed by the works | Painting of rooms outside the renovation area |
Scope of works inclusions/exclusions checklist
Before you price the job, confirm your scope of works states: what is included, item by item — what is explicitly excluded — the materials, brands and AS standards that apply — who is responsible for permits, access, power and waste — the assumptions the price depends on — and the process for pricing anything outside this scope as a variation.
Tying the Scope of Works to Your Priced Estimate
A scope of works only protects you if it lines up exactly with the estimate the client actually agreed to pay.
That means both documents should reference the same set of drawings and the same revision date — if the plans are updated after the price is issued, the scope needs to be reissued too. Every line item in the priced estimate should be traceable back to an inclusion in the scope; if a cost sits in the estimate but is not named in the scope, or the reverse, that gap is exactly where disputes and unpaid variations come from.
Treating the scope of works and the priced Bill of Quantities as two parts of one document — rather than a scope written once and a price built separately — is what keeps them aligned as a job changes.
Common Scope of Works Mistakes to Avoid
Most scope of works disputes trace back to a small number of repeated mistakes.
- Copying a scope from a previous job without checking it matches the current drawings
- Using vague terms like “as required,” “as directed” or “allow for” without a stated allowance
- Leaving out an assumptions section, so unknown site conditions have no agreed starting point
- Not dating or version-controlling the scope against the plan revision it was priced from
- Treating the scope as a formality rather than the document a variation claim will be judged against
- Having no agreed process for how changes to scope are priced and approved before work proceeds
How My Trade Hub Keeps Scope and Price Aligned
My Trade Hub is built so the scope of works and the priced estimate never drift apart in the first place.
Tender document templates give you a consistent structure for inclusions, exclusions, materials and standards, and responsibilities every time you price a job — so nothing gets left out because it slipped your mind. Tender preparation in My Trade Hub then ties that scope directly to measured quantities and your own editable rates library, so the price you send out is always traceable back to what the scope actually says is included.
It is free to create a My Trade Hub account to browse the tender marketplace, post jobs and receive quotes. Preparing a priced tender — including quantity takeoff, Bill of Quantities generation and tender document templates — is available on My Trade Hub’s paid Starter, Scale and Professional plans, in AUD, with no lock-in contracts. See the pricing page for current plan details.
- Tender document templates that structure inclusions, exclusions, materials and responsibilities consistently
- Tender preparation that ties the scope to a measured, priced Bill of Quantities
- An editable rates library, so every price behind the scope stays yours to adjust
- Preparing a priced tender is 60–75% faster than doing it manually
Frequently asked questions
What is a scope of works in construction?
A scope of works is the document that defines exactly what work is included in a job, what materials and standards apply, who is responsible for what, and the program it will be delivered to. It is the reference point used to resolve any dispute about what was actually priced.
What is the difference between a scope of works and a specification?
A scope of works defines what work is included and excluded, and who is responsible for each part. A specification goes further, setting out how that work must be carried out — the technical standards, finishes, brands and workmanship required.
Is a scope of works the same as a Bill of Quantities?
No. A scope of works describes the boundaries of the job in words. A Bill of Quantities takes that scope and turns it into an itemised, measured list of quantities, each priced against a rate.
What should be included in a scope of works?
At minimum, a scope of works should cover the project description, inclusions, exclusions, materials and standards, responsibilities, program and milestones, and the assumptions the price depends on.
How do you write exclusions in a scope of works?
State plainly what is not covered by the price, item by item — for example, asbestos removal, make-good outside the work zone, or supply of client-nominated items — rather than relying on the inclusions list to imply what is left out.
Why do scope of works disputes happen?
Most scope of works disputes come from vague wording, a scope that was not updated when the drawings changed, or no agreed assumptions section for unknown site conditions — leaving both sides with a different understanding of what was priced.
How detailed should a scope of works be?
Detailed enough that two different people reading it would describe the included work the same way — naming the item, the extent or quantity, and the standard or drawing reference it is measured against.
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