They solve two different problems
An estate sale, or an estate auction, exists to convert contents into money. A cleanout exists to make a property empty. Those sound like two halves of one job and they are usually sold as two separate services.
The distinction matters because the wrong one costs you either money or time. A sale on a house with little sellable value spends weeks to produce very little. A cleanout on a house with real value in it puts that value in a dumpster.
Both of these assume a house being emptied. If the reason is a move into somewhere smaller rather than an estate, downsizing your home covers the sorting that happens before either service is needed.
When a sale makes sense
When there is enough sellable value to be worth the labor of finding, describing and selling it. Is there enough value in a house for an estate sale works through how that is judged.
- A full workshop or garage. Tools hold value better than almost anything else in a house.
- Any collection that was collected deliberately, rather than accumulated.
- Jewelry, watches, coins, sterling, or anything that gets weighed.
- Furniture from before roughly 1970, or any named designer or maker.
- Art with a signature, rugs that were hand knotted, and musical instruments.
When a cleanout makes sense
When the contents are mostly late-model household goods, flat-pack furniture, mattresses, upholstery and clothing. None of that has a resale market that covers the cost of selling it.
It also makes sense when the deadline is short. Selling takes time that a close of escrow does not always allow.
What a removal costs is set by volume, access and disposal rather than by the size of the house. How much an estate cleanout costs covers what a quote is made of and what moves it.
The gap between the two
A sale company is measured on what it sells, so its job ends when the selling stops. A cleanout company is measured on an empty house, so it has no reason to slow down and identify what is valuable.
Hiring both means somebody has to coordinate them, and that somebody is normally the executor. Ask any company you speak to where its responsibility stops, and get the answer in writing.
The order matters
Sell first, clear second. Always in that order.
The most common expensive mistake is bringing in a dumpster before anybody has looked properly at what is in the house. The reverse mistake, running a sale on a house that needed a cleanout, wastes weeks but does not destroy anything.
Doing it yourself
A useful test costs you nothing. Walk the house and photograph anything you think might have value, then look for completed sales of the same thing online. Completed and sold, not asking prices.
If that exercise turns up very little, you need a cleanout and you can stop researching sale companies. If it turns up a lot, it is worth getting the contents looked at properly before anything leaves.