Exclusions and assumptions, spelled out

An exclusion identifies work outside the quoted scope. An assumption identifies a condition you used to calculate the price but could not verify. Write both beside the work they affect, and explain how you will price and obtain approval for a change.

What is the difference between an exclusion and an assumption?

They get written under one heading and they are not the same thing.

An exclusion is something you have already decided not to do. You have left that work or cost outside the quoted price, such as permit fees, haul-off or wall patching. Its existence or final cost need not already be known. Nothing has to happen for an exclusion to be true. It is true the moment you send the estimate.

An assumption is a condition used in your price that you have not yet verified. The wiring behind the plaster is copper and grounded. There is one layer of shingles up there. The soil under the patio is dirt, not fill and broken concrete. If the condition is different, check what the agreement says before proposing a price change.

That difference decides how each line reads. An exclusion says we are not doing that. An assumption says here is what we assumed, and here is what happens if we are wrong. An assumption should identify the next step, such as inspecting the exposed area and obtaining written approval for a repair.

Which exclusions should the estimate explain?

Check these items for the specific job. State what is included as well as what is excluded:

• Permits, plan review and inspection fees. Check the jurisdiction’s fee schedule. Say who pulls the permit and whose money pays for it, and add "at cost" if you are passing it through.
• Disposal and haul-off. The dumpster, the tipping fee, the per-item charges for a mattress or a refrigerant appliance. A tear-off with no disposal line looks cheaper than a competitor's and is not.
• Patching and paint after you open a surface. Electrical, plumbing, low-voltage and HVAC all cut into finished walls and ceilings. Say plainly whether you leave a clean cut, patch it flush, or texture and paint — three different prices and three different words.
• Matching existing finishes. Siding fades, tile dye lots move, flooring gets discontinued. Describe the match you can supply and obtain approval of a sample when the difference matters.
• Access and site prep. Moving furniture, emptying cabinets, clearing attic storage, containing pets, parking within reach of the truck. Cleaning and flooring crews lose real hours to this.
• Code upgrades an inspector requires. Once the wall is open on a permitted job, the inspector can call for work nobody quoted. Identify foreseeable code work in your scope. For a newly identified requirement outside the agreed scope, explain the price and schedule impact and get approval before proceeding; an exclusion does not remove code obligations.
• Hazardous material. Identify suspected lead paint or asbestos before disturbing it. For covered paid work in pre-1978 housing and child-occupied facilities, EPA’s RRP guidance requires certification, training and lead-safe practices. Its minor-repair exception is six square feet or less per interior room or 20 square feet or less outside, with additional conditions; window replacement, painted-surface demolition and prohibited practices do not qualify. Lead abatement has separate requirements. EPA’s asbestos guidance explains federal demolition and renovation rules; state and local requirements may add duties even where a federal residential exclusion applies. Stop affected work and establish who is qualified to handle it.

Assumptions name the condition and the price if it is false

An assumption needs an agreed response if the condition is different. Pair each one with the mechanism, so the customer agrees to the process before anybody is standing in a torn-up room. The wording is illustrative; enter the actual additional rates before sending the quote. For each change, record the scope, price, schedule effect and customer approval before starting the extra work:

Two habits make these usable. Number them, so a later change order can say "Assumption 3 did not hold" instead of relitigating the whole page. And put each one next to the line item it affects, not in a terms block below the signature line — the customer can review the condition alongside the price it affects.

Phrasing it as clarity, not as a disclaimer

Compare two ways of covering the same risk.

Contractor shall not be liable for latent or concealed conditions, including but not limited to water intrusion, structural deficiency, or code non-compliance discovered during the course of the work.

We priced this assuming the subfloor under the old vinyl is sound plywood. We won't know until it comes up. If there's water damage, we stop, show you the spot, and send the repair scope, price and schedule impact for your written approval before proceeding.

The first clause attempts a broad liability exclusion. The second explains an uncertain condition and the approval process; it does not have the same legal effect. Use specific wording to explain scope, and have counsel review any liability limitation.

Include the exclusions relevant to this job. Remove unrelated boilerplate, but keep qualifications the customer needs to understand the scope and price.

Use assumptions when proposing a change order

When an assumed condition is different, point to the relevant line and document what you found. The agreed pricing method gives you a starting point for the change; it does not replace approval of the actual work and schedule impact.

Written exclusions and assumptions help explain why you are proposing a change order. They do not guarantee that a customer will agree or that a disputed charge is enforceable.

Save exclusions and assumptions for reuse

In DoneQuote you can save descriptions in your catalog or quote templates and select the wording this job needs. Review exclusions and assumptions against the actual site conditions before sending.

Discuss exclusions and assumptions during the walkthrough

Discuss important exclusions during the walkthrough, then put them in the quote. For example: “Electrical rough-in includes cutting four access holes in the kitchen wall. Drywall patching and painting are excluded; we can quote them separately.” Ask the customer to review the written scope before approving it.