How many units do you actually need?
Start with headcount, then check the ratio. For job sites, OSHA 1926.51(c)(1) sets 1 toilet for 20 or fewer workers, moving to 1 toilet and 1 urinal per 40 once you pass 20, then per 50 at 200 or more workers. Farm crews doing hand labor fall under a different rule: OSHA 1928.110 wants a facility per 20 employees within a quarter mile walk. For events, plan on standard units running $130 to $500 for a week depending on duration and count. If you are staging a wedding, festival or fair, our how many porta potties do I need guide breaks the math down by guest count and bar service. Grabbing one extra unit is cheaper than a line at hour three. Cross-check your plan against the OSHA portable toilet requirements page before you finalize a headcount, especially if the job runs past 20 workers.
What does the site need before delivery?
Clear the drop zone first. A standard unit runs about 44 by 48 inches on the ground and stands roughly 92 inches tall, so give it flat, stable footing per ADA Standards 302.1 even if the unit itself is not the accessible model. If you are also getting a roll-off dumpster, the truck needs about 60 feet of straight clearance behind the pad to set it down safely. Mark the spot before the truck arrives in Lawrence, not after. Check overhead lines and low branches too. If the unit sits in a public right of way, that placement needs confirming with the city; we do not know Lawrence's rule on this and won't guess. See the porta potty placement guide and porta potty permit requirements page for what to ask about before delivery day. Water access matters if you are adding a handwashing station or portable sink, since OSHA 1926.51(a)(1) requires potable water at the worksite regardless of unit type.
Do you need an ADA-accessible unit?
Yes, if you are clustering multiple units for a public event. ADA Standards 213.2 requires at least 5 percent of a cluster to be accessible units, and never fewer than one. An ADA accessible unit needs a 60 inch turning circle per ADA 304.3.1 and a door opening of at least 32 inches per ADA 404.2.3, with a clear path at least 36 inches wide per ADA 403.5.1. Weekly rental for an ADA unit runs $120 to $240 in the local market. Ramps count too: any ramp into the unit cannot exceed a 1:12 slope under ADA 405.2. If your event draws from Eudora, 13.0 miles east of Lawrence, or Tonganoxie, 17.8 miles northeast, expect some guests who need the accessible unit closest to the parking area, not tucked behind the stage. Check the ADA restroom requirements page for the full breakdown before you order.
How often does service need to happen?
Weekly, at minimum, for standard use. ANSI/PSAI Z4.3 sets the baseline at one service visit per week for up to 10 users across a 40 hour week, so a busy job site or multi-day event needs more frequent pumping. Handwashing stations need restocked soap and towels too. 29 CFR 1910.141(d)(2) requires soap and towels or a hand-drying device at wash stations, and hand sanitizer alone does not satisfy that rule. If your crew is applying paint, coatings, herbicides or insecticides, OSHA 1926.51(f)(1) kicks in and washing facilities become mandatory, not optional. Septic tanks feeding a holding tank rental setup or a residential system typically need pumping every 3 to 5 years, driven by tank size and household size, so check our how often to pump a septic tank page if you are combining a home project with unit rental. Restaurant sites running a grease trap pumping schedule should know interceptors get serviced once fats, oils, grease and solids hit 25 percent of the liquid depth.
| unit | duration | typical price |
|---|---|---|
| standard | day | $150 |
| standard | week | $200 |
| standard | month | $200 |
| ada | week | $185 |
| deluxe | week | $250 |
| delivery_fee | day | $150 |
Booking a deluxe flushable unit for a wedding near Williamstown, 13.2 miles northwest of Lawrence, costs more than a standard rental but less than a full restroom trailer rental. Compare both against the porta potty rental cost page and the restroom trailer rental cost page before deciding. For longer jobs, the monthly porta potty rental rate beats booking week to week.
How far in advance should I book?
Book as soon as your event date or job start is set, ideally 2 to 3 weeks out for standard units and longer for trailers or ADA units in high season. Weddings and festivals in Lawrence fill fast in spring and fall. Last-minute needs still work through emergency porta potty rental.
What if my job site headcount grows mid-project?
Call and add units. OSHA 1926.51(c)(1) ratios shift at 20 and 200 workers, so a growing crew may cross a threshold that requires another toilet and urinal. Lawrence Porta Pros can swap in extra standard porta potty rental units without restarting your whole order.
Do I need a permit to place a unit on my property?
Not usually on private property, but placement in the right of way needs confirming with the city. We have not verified Lawrence's specific ordinance, so check with the city directly and see our porta potty permit requirements page for what questions to ask.
How do I know if a unit will smell bad?
Regular service prevents most odor complaints. ANSI/PSAI Z4.3's weekly service baseline keeps tanks from filling past capacity. See do porta potties smell for what actually causes odor and how servicing frequency fixes it.
Can I rent a handwashing station without a toilet?
Yes. Many job sites and events add a hand sanitizer station rental or plumbed sink separately from toilet units, especially food vendors. Check handwashing requirements to see which OSHA rule applies to your situation.
Next step
Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.