Semi-detached in the context of Council house

York University Heights, also known as Northwood Park, is a neighbourhood in Toronto, Ontario, Canada. It is one of Toronto's northernmost neighbourhoods, located along the northern boundary of Steeles Avenue in the former city of North York. The neighbourhood is so named because it contains the main campus of York University. This area is most popular with immigrants of Italian and Chinese descent who have established communities in the area. It is located between Sheppard Avenue and Steeles Avenue east of Black Creek (Derrydowns Park).

The neighborhood contains many private residences, many of which are detached and semi-detached bungalows, townhouses as well as a recent new urbanism development, The Village at York University, there is also a handful of condominiums, several lowrise apartments, and a few high rise apartments.

Medium-density housing is a term used within urban planning and academic literature to refer to a category of residential development that falls between detached suburban housing and large multi-story buildings. There is no singular definition of medium-density housing as its precise definition tends to vary between jurisdiction. Scholars however, have found that medium density housing ranges from about 25 to 80 dwellings per hectare, although most commonly sits around 30 and 40 dwellings/hectare. Typical examples of medium-density housing include duplexes, triplexes, townhouses, row homes, detached homes with garden suites, and walk-up apartment buildings.

In Australia the density of standard suburban residential areas has traditionally been between 8-15 dwellings per hectare. In New Zealand medium-density development is defined as four or more units with an average density of less than 350m. Such developments typically consist of semi-attached and multi-unit housing (also known as grouped housing) and low-rise apartments.

A villa is a type of house that was originally an ancient Roman upper class country house that provided an escape from urban life. Since its origins in the Roman villa, the idea and function of a villa have evolved considerably. After the fall of the Roman Republic, villas became small farming compounds, which were increasingly fortified in Late Antiquity, sometimes transferred to the Church for reuse as a monastery. They gradually re-evolved through the Middle Ages into elegant upper-class country homes. In the early modern period, any comfortable detached house with a garden near a city or town was likely to be described as a villa; most surviving villas have now been engulfed by suburbia. In modern parlance, "villa" can refer to various types and sizes of residences, ranging from the suburban semi-detached double villa to, in some countries, especially around the Mediterranean, residences of above average size in the countryside.

A duplex house plan has two living units attached to each other, either next to each other as townhouses and condominiums or one above the other like apartments. By contrast, a building comprising two attached units on two distinct properties is typically considered semi-detached or twin homes but is also called a duplex in parts of the Northeastern United States, Western Canada, and Saudi Arabia.

The term "duplex" is not extended to three-unit and four-unit buildings, as they would be referred to with specific terms such as three-family (or triplex) and fourplex (or quadplex/quadruplex) or a more general multiplex. Because of the flexibility of the term, the line between an apartment building and a duplex is somewhat blurred, with apartment buildings tending to be bigger, while duplexes are usually the size of a single-family house.

A housing estate (or sometimes housing complex, housing development, subdivision or community) is a group of homes and other buildings built together as a single development. The exact form may vary from country to country.

Popular throughout the United States and the United Kingdom, they often consist of single family detached, semi-detached ("duplex") or terraced homes, with separate ownership of each dwelling unit. Building density depends on local planning norms.

Ashford is a town in the Borough of Spelthorne in Surrey, England. The town lies 15 mi (24 km) west of central London. Its name derives from a crossing point of the River Ash, a distributary of the River Colne. Historically part of Middlesex, the town has been part of Surrey since 1965. Ashford consists of relatively low density low- and medium-rise buildings, none of them being high rise. If excluding apartments (at the last census 27% of the housing stock) most houses are semi-detached. In 2011 it had a population of 27,382.

Ashford railway station, on the Waterloo–Reading line, is served by South Western Railway. Heathrow Airport is 2.5 mi (4 km) north of the town.