Mid Term Flashcards
Four urban structures models
- Concentric circle
- Axial
- Sector
- Multiple nuclei
Concentric Circle Model
- pure bud rent
- zones radiate outward
1. CBD
2. Transition (industry, manufacturing, slums)
3. Lower income (renters who work in CBD or transition)
4. Higher income ( owner occupied, specialized commercial)
5. Suburbia
Axial Model
- emphasizes importance of transportation
- land in urban area that is well served by transportation facilities has a comparative advantage over land that is not
- land will develop along transportation routes
DC
Sector Model
- Affirms part of bid rent
- has CBD but wedges that radiate outward
- Wedges depend on distance from CBD and adjacent land use to guide land use
Multiple Nuclei Model
- Certain activities require specialized facilities
- many similar activities benefit from close proximity to one another
- Certain dissimilar activities are detrimental to each other
- Some activities must seek less desirable low price sites
Combo of axial and sector
What causes structures to decline in value?
Obsolescence
- Physical obsolescence
- Functional obsolescence
- Economic obsolescence
Physical Obsolesence
- the building is falling apart
- this causes the structure value to decline
- happens over time
Functional obsolescence
The building no longer meets its audience’s needs well
Not a physical thing a preference and taste thing
Small closets
Economic Obsolescence
The current use is no longer the highest and beat use for the property
Usage value at HBU increases widening the gap between property value and usage value
The Neighborhood Lifecycle
Gestation, Youth and Maturity
Incipient Decline
Clear Decline
Accelerated Decline and Abandonment
Rejuvenation or Gentrification
The Neighborhood Lifecycle
Growth, Youth, and Maturity
Property values are rising
Residents’ incomes are rising
Turnover is low
New residents are economically and socially similar to those already present
Owner occupied
The Neighborhood Lifecycle
Incipient Decline
Those leaving the Neighborhood are replaced by less affluent families
“Filtering” occurs (houses get passed down to lower income families)
Prices decline
Causes - physical obsolescence, external changes, aging residents, construction of more desirable areas
The Neighborhood Lifecycle
Clear Decline
Housing has become sub standard (Owners make only minimal repairs)
Housing densities increase
Public services to support increased density are increasingly inadequate
Rents as opposed to owners
The Neighborhood Lifecycle
Accelerated Decline and Abandonment
Mass exodus by families with economic means to leave
Unemployment higher than average
Landlords cease making repairs and often abandon their buildings
Virtually abandoned at terminal stage
The Neighborhood Lifecycle
Rejuvenation or Gentrification
Land values have decreased so much that large segments of the Neighborhood can be bought up cheap and revitalized or rebuilt
Displacement of people who live there