Residential

Select Urban Growth Boundary:	*
Forecast Region:
Run Date:	*

Housing Need

Population Forecast () Source: Oregon Population Forecast Program
Population Forecast () Source: Oregon Population Forecast Program
Population Change		010 OAR 660-038-0030(2) Calculate 14-year projected population growth using Portland State existing and projected 14-year populations.
Population Percent Change

Group Quarters Source: U.S. Census Bureau
Adjusted Population Change		020 OAR 660-038-0030(3) Adjust population change by the number of people living in group quarters, which is based on the percentage of people living in group quarters in the most recent decennial census.
Persons per Household Source: U.S. Census Bureau
Gross New Dwelling Units Needed		030 OAR 660-038-0030(4) Calculate the gross number of dwelling units based on the average household size in the most recent decennial census.
Vacancy Rate (fixed rate)
Additional Seasonal/Vacation Rate Source: U.S. Census Bureau
Total Vacancy Rate
Adjusted Gross New Dwelling Units Needed		040 OAR 660-038-0030(5) Calculate vacancy rate and adjust gross new dwelling units needed to account for vacant units.
Subtract DU not needing additional residential land
Mixed Use & Redevelopment ( % - % ) *		050 OAR 660-038-0030(6) Enter the percentage of residential units located on commercial land ("mixed use") expected during the planning period.
Accessory Dwelling Units ( % - % ) *		060 OAR 660-038-0030(7) Enter the percentage of accessory dwelling units expected during the planning period.
Gross New Dwelling Units Needing Land		070 OAR 660-038-0030(8) Adjust the gross new dwelling units needed to account for mixed use and accessory dwelling units.

Housing Mix & Land Need

	Low Density	Medium Density	High Density	Total
Existing Housing Mix	%	%	%		080 OAR 660-038-0040(1) Determine the current mix of housing types by density based on data from the most recent five-year American Community Survey (ACS) conducted by the U.S. Census. For cities with UGB population less the 2,500, the percentages are determined by the most recent ACS. For cities with UGB population greater than or equal to 2,500, the percentages are determined by either the most recent ACS or the average of the two most recent ACS.
Housing Mix Change		% * ( % - % )	% * ( % - % )		090 OAR 660-038-0040(3) Enter the projected change in housing mix by density. The percentage of low density will be calculated based on the percentages entered in the other column(s).
Future Housing Mix	%	%	%		100 OAR 660-038-0040(3) Calculate future housing mix by density category based on existing mix and the projected changes entered.
Dwelling Units Needed					110 OAR 660-038-0040(4) Calculate the number of dwelling units needed by multiplying the gross new dwelling units needing land by the housing mix percentages for each density category.
Dwelling Units per Acre	* ( - )	* ( - )	* ( - )		120 OAR 660-038-0050(1) Enter the projected number of net dwelling units per acre for each density category.
Net Acres Needed					130 OAR 660-038-0050(1) Calculate the land need for each density category by dividing the number of dwelling units needed by the projected dwelling units per acre.
Proposed Density					140 OAR 660-038-0050(2) Calculate the proposed density by dividing the total dwelling units needed by the total acres needed.
Existing Density	Existing Acres * (developed) Existing Acres * (partially developed)				150 OAR 660-038-0050(2) Enter existing acres (developed and partially developed) to determine existing density. Existing density is calculated by dividing total existing housing units by the total acres you enter here.

25% net to Gross-Public Lands (streets, parks, etc.)	25%	25%	25%		160 OAR 660-038-0050(4) An amount equal to 25% of the total residential land need is assumed to be needed for infrastructure and facilities such as streets, schools, parks etc.
Total Net Land Need					170 OAR 660-038-0050(4) Calculate total land need.

Buildable Land Inventory & Constrained Lands

	Low Density	Medium Density	High Density	Total
Vacant Acres	*	*	*		180 OAR 660-038-0060(1) Enter vacant acres by density category.
Partially Vacant Acres	*	*	*		190 OAR 660-038-0060(1) Enter partially vacant acres by density category.
Total Vacant/Part Vacant Acres					200 OAR 660-038-0060(1) Calculate total vacant/partially vacant acres.
Constrained Lands	*	*	*		210 OAR 660-038-0070(1) Enter number of acres for constrained lands by density category.
Adjusted Vacant/Part Vacant Acres					220 OAR 660-038-0070(1) Adjust vacant/partially vacant acres to account for constrained lands.
Total Net Land Need
Supply minus Net Need
Does need exceed available land?
If new land need does not exceed available land, do not proceed. Otherwise, see OAR 660-038-0080 for further instructions.

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