You send the same building details to three cleaning companies and get back three numbers that are miles apart. It's tempting to read that as 'one's cheap, one's expensive, one's in the middle.' Usually it means something else: the three vendors are quoting three different jobs, because you didn't tell them exactly what the job was.
A scope of work fixes that. It's the document that says what gets cleaned, how often, and to what standard — so every bid you get back is priced against the same job. Here's what belongs in one, and what vague scopes quietly leave out.
Why bids come back all over the map
When a scope just says 'nightly office cleaning,' each vendor fills in the blanks with their own assumptions. One assumes restrooms are fully serviced and restocked every visit; another assumes trash and vacuuming nightly with restrooms twice a week. One includes day porter coverage; another doesn't. One prices in supplies; another expects you to buy your own paper and soap.
None of them is necessarily wrong — they're answering different questions. The spread in the bids is the spread in the assumptions. Tighten the scope and the spread collapses, which is exactly when you can tell who's actually the best value.
The anatomy of a scope that works
A usable office scope covers seven things. Miss any of them and you've left a blank for vendors to fill differently.
- Areas and square footage — a room-by-room or floor-by-floor list, not just a total, so nobody guesses what's included.
- Frequency per task — the detail most scopes skip. State what happens every visit versus on rotation (e.g. vacuum nightly, dust weekly, high dusting monthly).
- Restrooms — service, restock, and how often, called out separately because they drive both labor and complaints more than any other area.
- Floors and rotation — carpet versus hard surface, spot cleaning versus periodic extraction or strip-and-wax, and how often each happens.
- Day porter or business-hours coverage — whether you need daytime presence for lobbies, kitchens, or multi-tenant common areas, or purely after-hours work.
- Supplies and consumables — who provides paper, soap, and liners, and whether the vendor tracks and restocks them.
- Quality and communication — how issues get reported and resolved, and whether there's a named contact rather than a general line.
The tasks vague scopes leave out
These are the line items that turn into 'I thought that was included' three months in. Name them explicitly in the scope so they're priced up front, not renegotiated later:
- Interior glass, entry doors, and partition cleaning — and how often.
- Kitchen and break-room detail beyond wiping counters — appliance exteriors, sink descaling, and floor mopping.
- High dusting, vents, and light fixtures on a periodic rotation.
- Carpet extraction and hard-floor strip-and-wax — whether they're in the base contract or scoped as separate periodic work.
- After-hours access, alarm procedures, and any security requirements the vendor has to staff around.
Turn the scope into a fair comparison
Once the scope is written, use it to make the bids genuinely comparable:
- Send every vendor the identical scope document, not a verbal summary or a different email to each.
- Ask each to price against your task-and-frequency list line by line, so you can see where a low bid quietly dropped a task.
- Have every vendor walk the building against the scope — a quote written without a walkthrough is a guess, and it won't hold.
- Compare on scope match first, price second. The cheapest bid that skipped restroom restock and day porter isn't the cheapest once you add them back.
A good scope of work does more than get you comparable bids. It becomes the standard you hold the winning vendor to for the life of the contract — the thing you point at when a restroom gets missed or a rotation slips. Writing it well up front is the cheapest insurance you'll buy on the whole account.
