Planning For Form Based Codes - Carlat CNU 17
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Transcript of Planning For Form Based Codes - Carlat CNU 17
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Planning for Form-Based Codes
Congress for the New Urbanism – June 12, 2009
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Attempts to develop with emphasis on character and form will always be compromised if the community does not plan for character and form.
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Evolution of Planning Efforts
Community Plans (1988)Detailed Neighborhood Design Plans (2002)
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Basics of Community Planning
What makes a “complete community”?Employment and services in proximity to housingHousing choiceTransportation choiceRecreational opportunities
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Form & Character Matters
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Form & Character Varies
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Transect MethodologyThe Transect
A tool for understanding, categorizing, and designing the natural and build environment from rural to urban.
Encourages diversity of development rather than homogeneity.First introduced in 2004 revision of the Land Use Policy Application.Later used as guiding principle in the Community Character Manual.
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Community Character ManualDictionary of all Community Character Policies
Community Character PoliciesIntended to preserve, enhance or create community characterChanges emphasis from land useand density to the form and characterProvides clear urban design guidanceWill replace land use policies as Community Plans updated
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What is Community Character?
The quality of a community as defined by its:built environment;natural features and open space; infrastructure, public facilities and services; and public realm – the character of its roadways and streetscape.
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1. Based on the Transectplanning tool;
Structure of the CCM
Different transect categories can sit side by side,
but within any transect category, all elements of development should be consistent.
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Nashville -Davidson County Transect
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2. Community Elements –Open Space, Neighborhoods, Centers, Corridors;
Structure of the CCM
T4 Open Space
T4 Neighborhood T4 CorridorT4 Center
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Community Elements
T4 Neighborhood T4 Corridor
T3 Neighborhood T3 Corridor
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Structure of the CCM 3. Policy Intent
Preserve
Enhance
Create
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Structure of the CCM 3. Community Character Policies
General Characteristics ApplicationAppropriate Land Uses Appropriate Zoning Districts Building Types
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Structure of the CCM 3. Community Character Policies
Design Principles Per PolicyBlock LengthAccessBuilding Form (Mass, Orientation, Placement)ConnectivityDensity/IntensityLandscaping
LightingParkingService AreaSignage
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T3 Suburban Neighborhood Maintenance• Moderate to deep setbacks
• Informal landscaping
• Shoulder and swale, likely no sidewalk
• Larger lots and smaller building footprint
• Moderate connectivity, often with curvilinear streets
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• Shallow setbacks
• Formal landscaping
• Curb and gutter with sidewalk
• Smaller lots and larger building footprint
• High connectivity with linear streets, shorter block lengths and complete grid
T4 Urban Neighborhood Maintenance
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General Principles
Overarching commitment to Sustainable Communities & Sustainable Development
Complete CommunitiesHousing & Neighborhoods
Gentrification, Revitalization & Deterioration
Historic PreservationNatural Resources PreservationInfill Development
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General Principles
Mixed Use Centers & Economic DevelopmentTransportationStreet Cross Sections & the TransectStormwater & the TransectTransitions between Policies/Determining the Boundaries of Policies
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Conservation Policy
Found in all Transect areas except T6 DowntownPreservation and remediation of environmentally sensitive land features
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Conservation Policy
FloodplainFloodwaySteep Slopes
View shedsRidgelinesUnstable Soils
Cedar Glades
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T2 Rural
Low density residential; mix of housing where appropriate.Low connectivityLarge setbacks are presentNatural landscaping
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T3 SuburbanLow to medium density residential, some mix of housing but are predominantly single-familyStreet pattern is usually curvilinear and has moderate connectivitySidewalks are provided in centers, along corridors, and in newer subdivisions
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T4 UrbanMedium density residential neighborhoods that contain a mix of housing
Street pattern is usually a grid and has high connectivity
Sidewalks widespread
More formal landscaping, street trees
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T6 Downtown
Commercial, civic and entertainment center.
Most intense, mixed use
Highly multi-modal with walkable, pedestrian friendly streetscapes
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Applying the CCM –Madison Community Plan Update
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Transect
Feedback from Visioning Workshop hints at Transect Categories
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Community Elements & Intent
Concept Plan designates Community Elements & Intent
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Community Character Policies
Staff propose policies
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Determine the appropriate policyIn “Application” of each policy, guidance on how to determine if the policy is appropriate for an area
Ex. T4 Urban Neighborhood Evolving applied to areas that are
Zoned residentialWhere the primary land use is residentialOr that are envisioned to become primarily residential
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Determine the appropriate policyEx. T4 Urban Neighborhood Evolving applied to areas where
The community has expressed an interest in “evolving” ORThe following characteristics are present:
High vacancy rates,High proportion of vacant landHigh potential for consolidation or subdivision of incongruous lots (little lot pattern)Incongruity between existing land use and zoningProximity to centers or corridors and/or Age/condition of existing development
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Set boundaries for each policyIn “Application” of each policy, “Commonly used boundaries include…”
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Determine “Special Policies” for each Policy Area
Any unique features are outlined in the plan. Otherwise, the basic policy applies.
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Newest Emphasis – Regionalism and Sustainability
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Regional Context – Transportation and Land Use
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Regional Context – Open Space Preservation
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Jennifer CarlatMetro Nashville/Davidson County [email protected]/mpc