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Porta potty for a 9-month barn conversion: rent or buy?

Luis A.asked 0 viewsHome Renovations & Long-termLong term rentalBuying vs rentingHome and long termWinterizationStandard unit

We're converting an old barn into a guest studio, no septic yet. The project will take about nine months with a crew of five working weekdays. I have a flat gravel pad next to the barn where a vacuum truck can pull right up. Weekly service is available but the delivery fee and monthly rental rate add up fast. I'm weighing whether to rent a single standard unit for the duration or buy one outright and just pay for pumping visits. The crew doesn't need anything fancy, but I want to avoid odor issues and keep it functional through Montana winter. Has anyone done the math on renting versus buying for a long job like this?

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Sam O.Portland, OR

For a nine-month project with a five-person crew, renting a standard unit is the clear choice over buying one. The OSHA construction sanitation standard, OSHA 1926.51, requires one toilet for 20 or fewer workers, so a single standard unit covers your crew. Renting includes delivery, regular service visits, and removal, while buying means you own a used unit you must dispose of later. The monthly rental rate bundles the cost of the unit, pumping, and supplies like toilet paper and deodorizer. If you buy, you pay upfront for the unit and then pay per pumping visit, which can have a separate trip charge. Over nine months, the per-visit costs and hassle of sourcing service add up to match or exceed the rental price. Weekly service frequency is standard for a crew of five; cold Montana winter may require winterization with antifreeze, which the rental company handles automatically. Your gravel pad with truck access is ideal. Renting transfers all maintenance and compliance risks to the operator.

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