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
Are you speculating what a spec house means? (sorry for the lousy pun) The textbook spec (or speculative) house definition is “one built on an experimental basis, without an order ...
As you’d expect, the rod has various meanings in everyday discourse. However, lesser-known is that surveyors use a rod as a land survey measurement for real estate. In a nutshell, a ...
The operating expenses definition is the sum of costs or expenses a company deals to operate as a business. The term operating expenses is used in any business field and is commonly ...
A lessee (tenant) subleases the apartment to a third party .The tenant is now sandwiched between the lessor and the sublessee. In other words, the tenant is acting as a lessee to the ...
Individual or entity who pays for the professional services of another person or business. ...
The practice of acquiring land for a future use. For example, a franchising company is projecting rapid nationwide expansion over the next five years. In order to prepare for the expansion, ...
A loan in which the entire charge is subtracted up front from the face value of a loan. The proceeds received are the face value of the loan less this deduction, which increases the ...
Term indicating a resemblance or analogous to a legal classification. For example, a quasi corporation, quasi contract, quasi possession, quasi offense. ...
land that is adjacent to water such as a stream. ...
Have a question or comment?
We're here to help.