Open Space Ratio
Definition of "Open space ratio"
When talking about the open space ratio we are referring to a term that is used in zoning laws and regulations. The open space ratio is a term used to measure open space on a developed land or zoning lot. The open space ratio is calculated in the percentage of open space in the building's square footage. For example, a housing subdivision containing 100 acres has devoted 10 acres to open space. Therefore, the open space ratio is 1/10 or 10 percent (10/100). Or an office building of 10,000 square feet with an open space ratio of 20% will have 2,000 square feet designated to remain open space.
Open Space Ratio in Residential Real Estate
The term open space ratio is a concept that applies to residential developments, and it usually refers to commonly used open space. While not necessarily a way to determine the ratio of “green” open space on lots of land proposed for residential development. The term open space ratio can refer to two types of open space:
- Allowable Areas
Allowable open space are the areas that are required common areas to be maintained and remain undeveloped for the benefit of those living or working on the lot parcel: parking lots, yard requirements, floodplains, recreational areas, stormwater management systems, etc.
- Prohibited Areas
Prohibited open space areas are privately owned sites that are not accessible for those living or working on the lot parcel and that are also available for further structural developments.
How is Open Space Ratio Calculated?
The open space ratio is a zoning law used by municipalities to be able to control the types of buildings built, their height, and their ratio of open space. It is a means for municipalities to ensure that the open space available on a developed land makes up a certain percentage of the lot developed. In most cases, that requirement is of a 20% open space ratio.
Open Space Ratio Formula:
Open Space Ratio (OSR) = Commonly-owned Open Space / Total Area Proposed for Development
So if you have 12 acres available for residential development and you have 6 acres of commonly-owned open space (ponds, recreation area, parking area, buffers, etc) you will have an open space ratio of 50%.
Popular Real Estate Terms
location where someone stays on a permanent basis. An example is a home to a family. ...
A correlation defines how two variables relate to one another. We can confirm a correlation if an alteration in one variable can change the other’s behavior. Using quantifiable data ...
Changes occurring in neighborhoods over time. The neighborhood life cycle includes the phases of birth, early growth, maturity, and decline. Not all neighborhoods pass through them more ...
Major lease in a structure that controls subleases. An example is a landlord and attorney entering into a main lease for the third floor offices of building. This lease takes precedence ...
A capitalization method which divides a properties first year net operating income by an estimated general capitalization rate to develop a total property estimate. ...
Grades have various definitions related to real estate and surveying land. Let’s have a look at the most common meanings of grades you’ll encounter in everyday life! Grades ...
Legal order for a person to present at a deposition or trial documents in his possession, such as related to a real estate transaction. ...
Tax-free status given to certain nonprofit organizations and governmental entities. Churches, charities, and government buildings do not pay property tax because of their tax-free status. ...
The legal description of property is a legal instrument to determine as best as one can, the physical boundaries and characteristics of a plot of land and the housing built on top of it. ...
Have a question or comment?
We're here to help.