Homeless shelter in the context of Peachtree-Pine shelter

Affordable housing is housing which is deemed affordable to those with a household income at or below the median, as rated by the national government or a local government by a recognized housing affordability index. Most of the literature on affordable housing refers to mortgages and a number of forms that exist along a continuum – from emergency homeless shelters, to transitional housing, to non-market rental (also known as social or subsidized housing), to formal and informal rental, indigenous housing, and ending with affordable home ownership. Demand for affordable housing is generally associated with a decrease in housing affordability, such as rent increases, in addition to increased homelessness.

Housing choice is a response to a complex set of economic, social, and psychological impulses. For example, some households may choose to spend more on housing because they feel they can afford to, while others may not have a choice.

The Salvation Army is a Protestant Christian church and an international charitable organisation founded and headquartered in London, England. It is aligned with the Wesleyan-Holiness movement. The organisation reports a worldwide membership of over 1.7 million, consisting of soldiers, officers, and adherents who are collectively known as salvationists. Its founders sought to bring salvation to the poor, destitute, and hungry by meeting both their "physical and spiritual needs". It is present in 133 countries, running charity shops, operating shelters for the homeless, and disaster relief and humanitarian aid to developing countries.

The theology of the Salvation Army derives from Methodism, although it differs in institution and practice; an example is that the Salvation Army does not observe sacraments. As with other denominations in the Holiness Methodist tradition, the Salvation Army lays emphasis on the New Birth (first work of grace) and entire sanctification (second work of grace). A distinctive characteristic of the Salvation Army is its use of titles derived from military ranks, such as "lieutenant" or "major". The Army's doctrine is aligned with the Wesleyan–Arminian tradition, particularly the holiness movement. The Army's purposes are "the advancement of the Christian religion... of education, the relief of poverty, and other charitable objects beneficial to society or the community of mankind as a whole".

An emergency shelter is a place for people to live temporarily when they cannot live in their previous residence, similar to homeless shelters. The main difference is that an emergency shelter typically specializes in people fleeing a specific type of situation, such as natural or man-made disasters, domestic violence, or victims of sexual abuse. A more minor difference is that people staying in emergency shelters are more likely to stay all day, except for work, school, or errands, while homeless shelters usually expect people to stay elsewhere during the day, returning only to sleep or eat. Emergency shelters sometimes facilitate support groups, and/or provide meals.

Post-disaster emergency shelter is often provided by organizations or governmental emergency management departments, in response to natural disasters, such as a flood or earthquake. They tend to use tents or other temporary structures, or buildings normally used for another purpose, such as a church or school. These settlements may be inhabited for the entire duration of the reconstruction process and should be thought of more as settlements than shelter, and need to be planned with respect to water / sanitation, livelihoods.