How many ADA units does a Baltimore job site need?
Start with ADA Accessible Porta Potty counts tied to your total unit count, not a flat number. ADA Standards section 213.2 says that where standard units are clustered, at least 5 percent must be accessible, and never fewer than one. So a bank of 10 standard toilets on a construction site needs at least one ADA unit next to them, not off in a separate corner. This is on top of the general toilet ratio under OSHA 1926.51(c)(1): one facility for 20 workers or fewer, then one toilet seat and one urinal per 40 workers as headcount climbs to 200, a rule covered in more depth on our OSHA Portable Toilet Requirements page. If you are not sure how the math lands for your crew size, run it through How Many Porta Potties Do I Need before you order. Baltimore sites near Towson, 8.0 miles north, and Dundalk, 8.1 miles east, get the same ratio, the requirement does not change by zip code. Pair the count with Standard Porta Potty Rental units for the rest of the crew and reserve the accessible slots for daily service, same as everything else, and check Construction Site Services if you need dumpsters or fencing on the same order.
What makes a portable restroom ADA accessible?
It is not just a wider door. The unit needs a 60 inch diameter turning circle per ADA Standards section 304.3.1, so a wheelchair can enter, turn, and exit without backing out. The door opening has to clear 32 inches per section 404.2.3, and everything a user has to touch, grab bars, the latch, has to work with one hand and no more than 5 pounds of force under section 309.4. Reach ranges matter too: section 308.2.1 caps unobstructed forward reach at 48 inches high and 15 inches low, which is why paper and sanitizer sit where they sit inside these units. The ground under and around the unit also has to be stable, firm and slip resistant per section 302.1, which is why placement on packed gravel or a leveled pad beats loose mulch or soft turf. Baltimore Porta Pros checks all of this before a unit leaves the yard, not after a complaint, and answers layout questions on our Frequently Asked Questions page too. For event layouts, our Porta Potty Placement Guide covers ground prep in more detail.
Do ADA units cost more to rent in Baltimore?
Yes, a bit. ADA units run higher than a standard unit because of the added footprint and hardware. Here is what that looks like across rental lengths:
| unit | day | week |
|---|---|---|
| ADA accessible | $200 - $400 | $185 - $240 |
| Standard | $100 - $350 | $130 - $500 |
Note the ADA week price still tops out below the day rate ceiling because longer bookings spread the delivery cost across more days. For a full cost breakdown across unit types, see Porta Potty Rental Cost or Porta Potty Rental Per Day if you're only renting for a weekend event, and start a Request a Quote once you know the count. Multi-week jobs should check Monthly Porta Potty Rental pricing instead of renting week to week, since the per-day cost usually drops. Delivery itself is billed separately and depends on distance and site access, similar to what we quote for Restroom Trailer Rental jobs, or Contact us directly for a site-specific number.
Where do accessible units need to go on site?
Route matters as much as the unit. ADA Standards section 405.2 caps ramp slope at 1:12, so if the unit sits on a platform or curb transition, the ramp up to it has to follow that ratio, not a steeper shortcut. The path from the accessible parking or drop-off point to the unit needs that same 36 inch clear width the whole way, per section 403.5.1, with no gravel ruts or hose lines crossing it. On a construction site this usually means placing the ADA unit near the site trailer, away from active work per OSHA 1926.25 housekeeping rules, and lit properly at night under OSHA 1926.56(a) if the job runs late shifts. Event planners get the same requirement without the OSHA overlay, and can pair the accessible unit with a Handwashing Station Rental for guests near the restroom bank. Check our Event Restroom Rental page or Wedding Restroom Rental guidance for layouts that keep the accessible route clear of tent stakes, cable runs and crowd lines. For festivals and races drawing bigger crowds, Festival Restroom Rental and Marathon and Race Restrooms both need accessible units placed at multiple points, not just one bank near the entrance.
Is one ADA unit enough for a small event in Baltimore?
Depends on total unit count. One accessible unit covers you at the 5 percent minimum under ADA 213.2 for smaller clusters. A backyard wedding with 4 standard units still needs at least one ADA unit, since the rule never drops below one regardless of the math.
Can I rent just the ADA unit without standard units?
Yes. Some renovation jobs or small crews just need the one accessible unit. Pair it with Home Renovation Porta Potty service if it is a single-family remodel, no minimum standard unit count required, or check Porta Potty Rental in Baltimore, MD for full city coverage.
Does the accessible unit need daily service like the others?
Yes, same schedule. ANSI/PSAI Z4.3 sets the baseline service interval at once weekly for up to 10 users over a 40 hour week. High-traffic events usually need more frequent visits regardless of unit type.
What is the difference between ADA and deluxe units?
ADA units meet the size and reach specs above. Deluxe Flushable Porta Potty units add flushing and sinks but aren't automatically ADA-sized unless ordered as accessible models. Ask when booking.
Do I need an ADA unit for a small residential job in Baltimore?
If it is just your crew and no public access, general ratios under OSHA 1926.51(c)(1) apply, not the ADA cluster rule. Once the public or event guests are involved, plan for at least one accessible unit near Baltimore Highlands or wherever the job sits.
Next step
Get a delivery date
Tell us the address, the dates and the headcount. We size the order and confirm the route.