Construction law is quite difficult, and takes experienced professional expertise. The Division of the State Architect functions as a building oversight agency on state-funded construction projects, and can only direct you to general resources at your local building department. If DSA is the jurisdictional authority, our "California Access Compliance Reference Manual" has all of the building code accessibility regulations and policies used on projects under DSA approval authority. The Manual is available as a free download as an Adobe Acrobat (PDF) file. The Manual is also available in hardcopy at technical bookstores throughout California.
When a property owner hits the 20% cost limitation on path of travel improvements, the jurisdictional entity cannot require further improvements to the path of travel to occur. The property owner should be advised, however, that for older facilities that pre-date the ADA, barrier removal is required by the ADA. Barrier removal, however, will not be enforced by the local jurisdictional entity.