- ISO code An identifier assigned to any object by the International Organization for Standardization.
- IT consultant A company which plans or designs a structure's information technology infrastructure.
- ice A load-bearing frame composed of solidly frozen water or packed snow.
- ice A flooring or ground surface composed of hard and usually flat ice.
- ice cream parlor A full service restaurant specializing in ice cream or other frozen desserts.
- ice cream shop A stand or eatery where ice cream or ice cream confections are sold at a counter.
- ice hockey One or more rinks for ice hockey with goals at both ends and an ice surface.
- ice skating Space for the practice or performance of figure skating or racing on ice skates.
- identification Fields which point to an object and distinguish it from others or from its context.
- identifier An internal or external reference key unique to each structure or other entity.
- illuminated logo An internally lit sign or graphic placed on the facade for high visibility.
- illumination An object, place, or site whose function is to cast light on the surrounding area or some particular object nearby.
- illustration A drawing of an object, either by hand or machine or computer.
- image A multicolor surface which is largely filled by one or more representational pictures.
- image category Photographs, drawings, and graphics used to represent objects.
- immigration control A place where government officers screen persons entering a country.
- immigration office A government office which administers immigrant affairs.
- immunology Clinical space devoted to treatment of the immune system.
- in ruins Demolition or destruction has ended, but part of the structure remains.
- in-situ sculpture An ornamental or commemorative carving out of rock naturally existing on the site.
- inactive A company which has ceased to operate.
- incandescent wall lamps Lights using electrically heated filaments which are mounted on the wall.
- incarnation A temporal phase in a structure's existence, delineated by major changes in the structure.
- inclined autowalk rise The difference in step level between the lowest and highest points on an inclined autowalk.
- inclined elevator An elevator whose track deviates perceptibly from a straight vertical line.
- indian food take-out A place without table service where customers order Indian-style food for take-out or delivery.
- indian restaurant A restaurant specializing in Indian cuisine.
- indigo Dark purple with a strong bluish component.
- individual A single person acting in the role of a company with respect to a structure or complex.
- individual contests A venue for athletic games which involves direct competition between individual players.
- individually-owned housing Housing which is occupied by the owner or leased out by individual unit owners.
- indonesian restaurant A restaurant specializing in Indonesian cuisine.
- indoor air pressure The difference in air pressure between an enclosed building space and the surrounding space.
- indoor arena A fully enclosed stadium whose roof cannot be retracted.
- indoor cranes Machines inside a structure which use a boom and hoist to lift heavy objects.
- indoor football An indoor field for American football, smaller than the 100-yard outdoor field.
- indoor fountain A decorative moving water feature inside a building.
- indoor metro entrance A direct internal connection to a subway or other rapid transit station.
- indoor observation floor A public indoor observation room on a high floor.
- indoor skydiving A place where the experience of freefall is simulated indoors.
- indoor soccer A walled field for football (soccer), usually indoors, with goals at both ends.
- indoor sports General space for unspecified or multiple indoor athletic contests.
- indoor window shades Interior screens or blinds which cover windows, not including curtains.
- industrial material Facade materials manufactured by combining or processing other materials.
- industrial plant A large enclosed building for industrial use whose form is more complex than a low-rise building.
- industry Space used for manufacturing, assembling, or producing goods.
- infant clothing store Retail space specializing in clothing for babies or toddlers.
- infectious disease care A clinic or medical office specializing in treatment of diseases caused by bacteria and viruses.
- information technology Companies which build devices, create software, and provide services in computer and related information technology industries.
- infrastructure A distinct structure which forms an integral part of a large public functional network.
- infrastructure Structures and spaces which serve basic civil functions as part of extensive built networks.
- inland waterway A navigable water route through a land mass, using canals, rivers, etc.
- inline hockey One or more rinks for hockey played on inline roller skates, with goals at both ends.
- inpatient clinic A facility providing medically supervised housing for long-term or recovering patients.
- input date The automatically recorded time when any data value is recorded in the database.
- insect exhibit A zoo habitat for housing and displaying insects.
- institutional office Working space for organizations in non-commercial fields.
- insulation material Forms and substances used as thermal insulators in building walls, roofs, and facades.
- insulation position The position of thermal insulation materials with respect to the structural perimeter walls or framework of a building.
- insurance A company involved in the financial protection and risk management industry.
- insurance agent A company which sells insurance policies to building owners.
- insurance branch An insurance company which operates any retail or service branch for customer interactions.
- insurance branch A retail outlet selling and dispensing the insurance-related services.
- insurance company A company which provides risk management and financial protection services.
- interdenominational church A house of worship open to liturgical use by any Christian denomination.
- interior cleaning Companies which specialize in cleaning interior building spaces.
- interior designer The designer of interior spaces throughout a structure.
- interior fit-out A contractor which constructs the rooms inside a building.
- interior insulation Thermal insulation installed on the inward-facing side of the structural walls or framework, usually directly behind the inner wall.
- interior ministry A central executive office of a government department of internal affairs, especially policing, security, and immigration.
- interior underground depth The total depth below base level of interior space within a structure, including spaces below the lowest floor.
- interior wall thickness The median distance between the two opposite finished sides of a wall dividing the interior of a building.
- interlaced alternating stairway Two alternating stairways threaded together.
- interlaced angular helix stairway Multiple stairways threaded together in a rectangular helix.
- interlaced helix stairway Multiple stairways curving around the same central axis.
- intermediate school Classroom space for students between elementary and college or university level.
- internal safety rooms Special rooms reserved for occupants to gather in in the event of an attack or disaster.
- internal transport system manufacturer A company which produces transport systems other than elevators and conventional means for use within or between structures.
- internal transport systems Mechanized systems which convey persons and objects within a structure.
- internal wall manufacturer A manufacturer of drywall or other constructed partitions inside a building.
- internal zone Module types defined as interior divisions within a structure.
- international courthouse A court of law with international jurisdiction, usually legitimized by treaties between countries.
- international style High modernism of the 1950s-1970s, characterized by simple forms and spacious interiors.
- interpersonal connection A defined relationship between two users or individuals.
- interrupted Construction has stopped, and the structure remains incomplete.
- investment advisor A financial specialist who advises on investing in real estate.
- investor A company or individual which provides capital for a development project with the expectation of earning interest.
- involvement zone A section of a building defined by the activity of a company with regard to it.
- ionic column A classically styled column with scrolled flares at the 4 corners of the capital.
- iron A roof-supporting framework made of iron.
- iron A load-bearing frame composed of unalloyed iron, usually in the form of joined beams.
- iron A staircase frame built of iron beams or other iron supports.
- iron mine A site where naturally occurring iron ore is extracted from the earth.
- iron sheeting Roofing made of large sheets or slats of iron.
- irregular A floor plan whose shape does not approximate any other available category.
- irregular roof Roofs which do not approximate any other defined roof type.
- islamic Architecture of the Middle East typified by multiple minarets, slightly pointed domes, and elaborate geometric or calligraphic decoration.
- islamic affiliation Directly connected with the Islamic faith or operated by an organization belonging to it.
- italian restaurant A restaurant specializing in Italian cuisine.
- italianate Architecture based on features of Italian Renaissance villas, with rectangular forms, projecting cornices, and decorative borders.