How to write a scope of work for a contractor job
Published
Short answer
A scope of work states in writing exactly what will be done for the price: location, work steps, materials, exclusions, assumptions, schedule and finish standard. Use verbs and quantities instead of labels, list what is excluded, cover undecided choices with allowances and get the customer's written acceptance of scope and price together.
A scope of work answers one question in writing: what exactly will be done for this price? Most arguments about extra charges start because two people pictured two different jobs. One page of plain sentences, agreed before the work starts, removes most of them.
What is a scope of work?
The scope is the description of the work: what you will do, where, with which materials, and what is left out. The estimate adds the prices. You can write the scope as the top part of your estimate or as an attached page, but the customer should accept both in one go, so the price and the description cannot drift apart.
If you have not written an estimate before, start with how to write a contractor estimate and come back here to tighten the wording.
What are the seven parts of a useful scope?
- Location: the address and the exact rooms or areas, for example "upstairs bathroom, 3.2 by 2.1 meters"
- Work to be done: the steps in the order you will do them, each starting with a verb
- Materials: what you supply, what the customer supplies, and the grade, brand or color where it matters
- Exclusions: what is not part of this job, even if the customer might expect it
- Assumptions: the site conditions your price depends on, such as access, power, water, parking and working hours
- Schedule: the start date, the expected duration and any milestones that depend on deliveries
- Finish standard: what counts as complete, who removes the waste and what state the area is left in
How specific should the wording be?
"Paint bedrooms" can mean a light refresh or a full repaint with filling and sanding. Compare it with: "Fill nail holes and small cracks, sand, prime stains, and apply two coats of the customer's chosen white to the walls (about 68 square meters) and ceilings (about 28 square meters) of bedrooms 1 and 2. Doors, frames and radiators are not painted."
The second version takes thirty seconds longer to write and answers the questions the customer would otherwise ask in the middle of the job. Wherever you can, add a number: a count, an area, a length or a thickness.
Example: replacing a bathroom vanity
- Included: disconnect and remove the old vanity and take it away; supply and fit one 900 mm vanity unit and mixer tap chosen by the customer; connect to the existing supply and waste; seal the top edge with silicone; test for leaks
- Excluded: tile repair behind the old unit, moving any pipework, replacing shut-off valves, painting
- Assumption: the existing shut-off valves work and the wall behind the unit is sound. If a valve must be replaced, it is added at 85 per hour plus parts after the customer approves it
- Schedule: one day, starting at 8:00, with water off for about three hours
A short job shows the idea. The price is 1,150: 640 for the vanity unit and tap, 510 for six hours of labor at 85 per hour.
How do exclusions and assumptions prevent disputes?
Exclusions feel awkward to write because they sound negative. They are the cheapest insurance you have. "I thought that was included" is the most common reason a customer disputes an invoice, and a written exclusion ends the conversation in one sentence.
Pair each major unknown with a rule for pricing it. "If rotten timber is found under the floor, it is replaced at 60 per square meter after the customer approves it" turns a surprise into a known procedure. When extra work does appear, follow the steps in change orders: pricing extra work.
How do I handle choices the customer has not made?
If the customer has not chosen tiles, fixtures or flooring, do not guess silently. Write an allowance: "Tile allowance: 45 per square meter supplied, for 12 square meters, which is 540." If the customer later picks a 70 per square meter tile, the difference is 25 times 12, so 300 is added, and nobody is surprised.
Say how long the allowance choice stays open. A tile that arrives three weeks late can stall the job and push your next one back.
How do I get the scope accepted in writing?
Send the scope and price together and ask for a written reply: a signed copy, or a message that says "accepted". Keep that reply with the job records. Whether a written contract is required, what it must contain and which licenses apply depend on your country, region and trade and on the size of the job, so check your local rules. This guide is general information, not legal advice.
Scopes in SiteReporta
In SiteReporta you write the scope into the estimate itself: a document title, the project name, and line items that each have a name and a details field, with notes and terms where exclusions and assumptions can go. The estimate exports as a PDF on A4 or US Letter. Acceptance is a status you set by hand; the app has no e-signature, so keep the customer's written reply yourself.
Once the estimate is accepted, you convert it to an invoice with identical totals, as described in estimate vs invoice.
Common mistakes
- Describing the result ("new bathroom") instead of the work and the boundaries
- Leaving out who buys and who delivers each material
- Forgetting access, parking and working hours, which affect the labor price
- Writing the scope after the price has been agreed, when changing it feels like a negotiation
- Putting exclusions only in a verbal conversation
Frequently asked questions
Is a scope of work the same as an estimate?
No. The scope describes the work, and the estimate adds the prices. Write the scope as the top part of the estimate or as an attached page, and have the customer accept both together.
How long should a scope of work be?
A page of plain sentences is enough for most small jobs. Long enough to cover the seven parts, short enough that the customer reads it.
What is an allowance?
An allowance is an amount for something the customer has not chosen yet, such as 45 per square meter for tiles. If the choice costs more or less, the difference is added or taken off at an agreed rate.
What if the customer asks for something outside the scope?
Treat it as extra work with its own price and get approval before you start, as described in change orders and extra work.
Do I need a written contract?
It depends on the country, region, trade and job size. In California, for example, a home improvement contract must be in writing when the work costs more than 500 dollars. Check your local rules.
Sources
Official sources for the rules and figures mentioned in this guide. Rules change and differ by place, so check the current text and your local rules.
- FTC Consumer Advice: How to avoid a home improvement scam (what to put in writing)
- California CSLB: Learn about home improvement contracts
- Citizens Advice (UK): Before you get work done on your home
General guidance, not legal, tax or accounting advice. Rules differ by country and trade.