MBE / HUB-Certified Texas MEP
Restroom Fixture Counter (IPC + TAS)
Quick lookup for required restroom plumbing fixtures per IPC Table 422.1 (water closets, lavatories) and TAS Chapter 6 accessibility. Enter occupancy type and load — we return the minimum WCs, lavs, drinking fountains, service sinks, and the family/assisted-use room trigger.
From IBC occupancy classification on your floor plan.
Sum of male + female (50/50 split assumed unless your AHJ specifies otherwise).
Most Texas AHJs are on 2021 IPC. Older editions on request.
Required minimum fixtures (IPC 422.1)
Water closets (Male)1
Water closets (Female)1
Lavatories (Male)1
Lavatories (Female)1
Drinking fountains1
Service sinks1
Family / assisted-use toilet room0
Basis: Business (B), 50 occupants, 50/50 split. IPC 422.1 ratios: 1 WC per 25 (first 50), 1 lav per 40 (first 80), 1 DF per 100, 1 service sink minimum.
+ TAS 213
Texas Accessibility Standards (TAS) require at least one ADA-compliant water closet, lavatory, and accessible route per restroom group. Multi-stall restrooms need an accessible stall (60" clear) plus typical lavatory clearances. Single-occupant restrooms in B occupancy may be combined under TAS 213.2 exception.
Need this fixture count on your permit set?
Pyra Engineering produces sealed plumbing plans with IPC + TAS fixture schedules. Quote in 1 business day.
Important. This is the IPC Table 422.1 minimum. Local amendments (City of Austin, Houston, Dallas) sometimes raise restaurant or assembly counts. Single-user / all-gender exception: IPC 403.1.2 lets a single-occupant restroom serve in lieu of separate-sex restrooms for spaces with occupant load ≤ 15 (or ≤ 50 in some 2021 amendments). Family room trigger: IPC 403.2.1 requires a family/assisted-use toilet room in assembly and mercantile occupancies once the calculated count reaches 6+ male AND 6+ female water closets. Always verify with the AHJ plumbing reviewer before submittal.