unnecessary. Deliberately grading to permit the sidewalk to meet the porch without a step creates access with an invisible modification. For the 40% of homes built with a slab-on-grade foundation, the zero-step entrance is typically extremely easy. The methods for homes are virtually identical to those used for slab-built commercial buildings such as banks and restaurants. For homes with basements or crawlspaces, several solutions can provide low-cost, attractive zero-step entrances. Among these are using a porch as a bridge to the sidewalk; lowering the first-floor rim joist into a notch in the foundation wall at the time of construction; a short, conventional ramp tied into a side or back deck or porch; creative use of a small retaining wall; and constructing the zero-step entrance from the garage. Siting the home properly on the lot is the first step. Then grading and landscaping with access in mind makes creating a zero-step entrance quite easy. History In the United States, the Visitability movement was begun by grass roots advocates led by Eleanor Smith in an organization called Concrete Change. She originated and developed the concept in 1986, at that time using the term "Basic Home Access". In 1990, when US advocates learned that the term "Visitability" was used in the United Kingdom (UK) for a similar concept, they adopted the term to emphasize that the goal is not the traditional "more homes for the disabled" but rather a change in standard homebuilding procedure. The Atlanta chapter of Habitat for Humanity became the first organization to commit to going beyond accessibility in homes with disabled family members. By including these basic access features in every home built their commitment contributes to an inclusive neighborhood for people with disabilities. Concrete Change continues to grow in number of participants and number of open-market houses built with the basic features. In 2017 Eleanor Smith retired Concrete Change. NCIL, the National Council on Independent Living has agreed to transition and maintain all her data from the Concrete Change website to a new website; www.visitability.org. The UK has applied the most widespread legal application of the concept to date. In 1999, Parliament passed "section M", an amendment to residential building regulations requiring basic access in all new homes. Advocates maintain that the philosophical underpinning of Visitability is as important as the list of features. They maintain that building homes with steps at all entrances and narrow interior doors