Ordinance No. 20585 - Laserfiche WebLink

Home Browse Search

Capacity Method 1 uses the following information: All buildable land that falls within a category of land (e.g., parcels smaller than 1 acre with a slope of less than 5% and an elevation below 900 feet). Net Density assumptions about the average density that land will develop at. The density assumption begins with identifying a preliminary average residential density that would occur on those acres if all the buildable land was dedicated to housing units. The method does not require site specific density assumptions; rather it applies average densities to all buildable land in a category to derive a dwelling unit estimate. Gross Density assumptions to account for buildable land that will be used for right-of-way to serve the new housing, creating a gross density assumption. It is clear that future streets and sidewalks will consume some of the land in the categories listed above. The net density assumption was adjusted to a gross density assumption based on the amounts of land used for rights-of-way in existing housing, referred to as a net -to -gross conversion.50 Accounting for land needed for rights -of way (e.g., streets and sidewalks) in this way results in a density assumption that ensures the city is not over -estimating the housing capacity of its current residential land supply by recognizing that some land will be used for rights-of- way. The capacity estimate (in dwelling units) results from multiplying acres of buildable land by the gross density assumption. Capacity Method 1 results in an estimate of the total number of units that can reasonably expect to develop on the acres of buildable land.51 50 OAR 660-024-0010(6) provides the following definition: "Net Buildable Acre' consists of 43,560 square feet of residentially designated buildable land after excluding future rights-of-way for streets and roads. Thus, a gross acre is an acre that includes future rights-of-way for streets and roads. Net densities are always higher than gross densities. Sample net to gross calculation for single-family detached using a 25% net to gross factor: Gross density = net density * (1-0.25). For example: net density of 6.0 dwelling units per acre equates to a gross residential density of 4.5 dwelling units per acre (6.0 * (1-.25)=4.5). 51 The method 1 capacity estimates do not represent the minimum or maximum number of units possible on a particular site or any analysis of whether future development on a particular site can develop more or less densely than the overall density assumption. Part 11 — Eugene Housing Needs Analysis ECONorthwest Page 121