Urban Planning Principles
Expert-defined terms from the Professional Certificate in Urban Planning course at London School of Planning and Management. Free to read, free to share, paired with a professional course.
Accessory Dwelling Unit (ADU) – Related terms #
Secondary Suite, Granny Flat. An ADU is a secondary residential unit on the same lot as a primary dwelling. Examples include a converted garage or a detached cottage. Practical application: increases housing density without altering neighborhood character. Challenges: zoning restrictions, parking requirements, and utility connections.
Adaptive Reuse – Related terms #
Historic Preservation, Mixed‑Use Development. Adaptive reuse involves repurposing existing structures for new functions, preserving cultural heritage while meeting contemporary needs. Examples include turning an old factory into loft apartments. Benefits: reduces demolition waste and revitalizes neighborhoods. Challenges: structural limitations, code compliance, and financing gaps.
Affordability – Related terms #
Housing Cost Burden, Inclusionary Zoning. Affordability refers to the ability of households to secure adequate housing without spending excessive income. Example metrics use the 30 % of income threshold. Practical tools: rent subsidies, density bonuses, and land trusts. Challenges: market pressure, limited funding, and gentrification effects.
Air Rights – Related terms #
Transferable Development Rights (TDRs), Zoning Overlay. Air rights are the legal ability to build above a property, often used in dense urban cores. Example includes constructing a tower over a railway station. Applications: maximizes floor area ratio (FAR) while preserving ground‑level uses. Challenges: structural engineering costs and coordination with multiple stakeholders.
Arcology – Related terms #
Vertical City, Eco‑City. Arcology combines architecture and ecology to create highly dense, self‑sustaining urban habitats. Example concepts include the “Arcosanti” experimental town. Practical uses: reduces land consumption and travel distances. Challenges: social acceptance, high initial capital, and complex infrastructure integration.
Brownfield – Related terms #
Site Remediation, Environmental Assessment. A brownfield is a previously developed land potentially contaminated by industrial activities. Examples include former gas stations or factories. Redevelopment can spur economic growth and prevent sprawl. Challenges: cleanup costs, liability issues, and uncertain market demand.
Building Height Limit – Related terms #
Setback, Zoning Ordinance. Height limits control the maximum vertical dimension of structures to preserve skyline, sunlight, and neighborhood scale. Example a 30‑meter cap in a historic district. Applications: guide urban form and protect view corridors. Challenges: balancing density goals with community concerns.
Cluster Development – Related terms #
Planned Unit Development (PUD), Conservation Subdivision. Cluster development groups homes on a portion of a site, leaving open space for recreation or environmental protection. Example a subdivision with shared greenways. Benefits: preserves natural features and reduces infrastructure costs. Challenges: requires flexible zoning and cooperative landowners.
Community Land Trust (CLT) – Related terms #
Affordable Housing, Asset‑Based Community Development. A CLT is a nonprofit entity that holds land in perpetuity to ensure long‑term housing affordability. Example models in Burlington, VT. Practical use: separates land ownership from home ownership, limiting resale price. Challenges: financing, governance, and scaling the model.
Comprehensive Plan – Related terms #
Master Plan, Strategic Planning. The comprehensive plan is a long‑range policy document that guides land use, transportation, housing, and environmental goals for a municipality. Example sections include land‑use maps, growth forecasts, and implementation strategies. Benefits: provides a coordinated vision. Challenges: political turnover, funding constraints, and public engagement.
Context‑Sensitive Design – Related terms #
Place‑Based Planning, Urban Fabric. This design approach tailors new development to the physical, cultural, and social characteristics of its surroundings. Example using brick façades that echo historic streetscapes. Applications: enhances sense of place and reduces visual conflict. Challenges: balancing innovation with preservation.
Density Bonus – Related terms #
Inclusionary Zoning, Floor Area Ratio (FAR). A density bonus allows developers to exceed standard zoning limits in exchange for providing public benefits such as affordable units or open space. Example a 20 % bonus for each affordable unit built. Benefits: incentivizes community contributions. Challenges: calibrating the bonus to be attractive yet equitable.
Ecological Footprint – Related terms #
Carbon Budget, Sustainable Development. The ecological footprint measures the amount of land and resources required to sustain a population’s consumption patterns. Example using per‑capita metrics to guide planning decisions. Applications: informs land‑use allocation and green space targets. Challenges: data availability and translating abstract metrics into concrete policies.
Economic Base Analysis – Related terms #
Employment Multipliers, Regional Economics. This analytical tool distinguishes basic (export‑oriented) from non‑basic (local) employment to assess a region’s economic health. Example identifying a manufacturing plant as a basic employer. Uses: forecasting growth, targeting incentives. Challenges: dynamic economies and data lag.
Environmental Impact Assessment (EIA) – Related terms #
Strategic Environmental Assessment (SEA), Mitigation Plan. An EIA evaluates the potential environmental consequences of a proposed project before decisions are made. Example assessing air quality impacts of a new highway. Practical steps: scoping, baseline studies, impact prediction, and mitigation. Challenges: ensuring rigorous analysis, avoiding “paper‑only” outcomes, and integrating public input.
Equitable Development – Related terms #
Environmental Justice, Inclusive Planning. Equitable development seeks to distribute benefits and burdens of urban change fairly across all socioeconomic groups. Example incorporating affordable housing in a transit‑oriented development (TOD). Tools: community benefit agreements, participatory budgeting. Challenges: entrenched inequities, displacement risk, and measuring outcomes.
Exclusionary Zoning – Related terms #
Growth Management, Housing Segregation. Exclusionary zoning refers to land‑use regulations that limit affordable housing and reinforce socioeconomic segregation, such as minimum lot sizes or single‑family only rules. Example a suburb that bans multi‑family dwellings. Impacts: reduced housing supply and increased segregation. Challenges: legal challenges, political resistance, and reconciling property rights.
FAR (Floor Area Ratio) – Related terms #
Density Metric, Zoning Code. FAR is the ratio of a building’s total floor area to the size of the parcel on which it sits. Example a 2.0 FAR on a 10,000 sq ft lot permits 20,000 sq ft of floor space. Uses: controlling intensity, guiding infrastructure provisioning. Challenges: interpreting FAR in mixed‑use contexts and balancing with height limits.
Floodplain Management – Related terms #
Stormwater Control, Resilience Planning. Strategies to reduce flood risk include restricting development, elevating structures, and preserving natural flood buffers. Example mandating setbacks from the 100‑year flood line. Benefits: protects life and property, reduces insurance costs. Challenges: climate change uncertainty, property rights, and retrofitting existing development.
Form‑Based Code – Related terms #
Zoning Overlay, Design Standards. Unlike traditional zoning, a form‑based code regulates the physical form of development—building placement, façade, and streetscape—rather than land‑use. Example a downtown code that mandates active street frontages. Advantages: predictable urban form and mixed uses. Challenges: requires detailed mapping, community education, and enforcement capacity.
Green Infrastructure – Related terms #
Low‑Impact Development (LID), Stormwater Management. Green infrastructure uses natural systems—rain gardens, permeable pavements, urban forests—to manage water, improve air quality, and enhance livability. Example a citywide network of bioswales. Practical benefits: cost‑effective, aesthetic, and climate‑resilient. Challenges: maintenance responsibilities, land acquisition, and performance monitoring.
Growth Boundary – Related terms #
Urban Growth Boundary (UGB), Smart Growth. A growth boundary delineates the outer limit of urban development to contain sprawl and protect rural lands. Example Portland’s UGB that caps new residential zones. Benefits: concentrates investment, preserves open space. Challenges: land price escalation inside the boundary and political pressure to expand it.
Historic District – Related terms #
Conservation Area, Preservation Ordinance. A historic district is a geographically defined area with a concentration of historic or culturally significant buildings, protected by design guidelines. Example a Victorian neighborhood with regulated façade alterations. Uses: tourism, cultural identity, and heritage education. Challenges: balancing property rights, funding maintenance, and adapting to modern needs.
Housing Needs Assessment – Related terms #
Demographic Forecast, Affordability Gap. This assessment quantifies current and projected housing demand by type, income, and location. Example identifying a shortage of two‑bedroom units for middle‑income families. Applications: informs policy, zoning changes, and funding allocations. Challenges: data accuracy, rapidly changing market conditions, and political buy‑in.
Impact Fees – Related terms #
Development Charges, Infrastructure Funding. Impact fees are charges levied on developers to fund the provision of public facilities—roads, schools, parks—required by new development. Example a $5,000 per residential unit fee for road upgrades. Benefits: aligns costs with beneficiaries. Challenges: ensuring fees are proportional, preventing cost‑shifting to renters, and legal challenges.
Infill Development – Related terms #
Urban Revitalization, Brownfield Redevelopment. Infill development utilizes vacant or underused parcels within existing urban fabric to add housing, jobs, or services. Example converting an empty lot between two apartment blocks into a mixed‑use building. Advantages: reduces sprawl, leverages existing infrastructure. Challenges: site constraints, community opposition, and financing.
Integrated Transport‑Land Use Planning – Related terms #
Transit‑Oriented Development (TOD), Mobility‑Hub Planning. This approach synchronizes land‑use decisions with transportation investments to create compact, walkable neighborhoods that reduce car dependence. Example zoning higher densities around a new light‑rail station. Benefits: lower congestion, improved air quality, and increased property values. Challenges: inter‑agency coordination, market timing, and ensuring affordable options.
Joint Development – Related terms #
Public‑Private Partnership (PPP), Air‑Rights Transfer. Joint development involves collaboration between public agencies and private developers to deliver mixed‑use projects that serve public goals, such as stations with retail and housing. Example a city-owned transit station topped with a private office tower. Advantages: risk sharing, leveraging expertise. Challenges: complex contracts, aligning timelines, and ensuring public benefit.
Kinetic Urbanism – Related terms #
Dynamic Public Spaces, Temporary Urbanism. Kinetic urbanism emphasizes adaptable, movable, or temporary elements in the built environment to respond to changing needs. Example pop‑up markets in underutilized streets. Benefits: flexibility, community activation, and low cost. Challenges: regulatory hurdles, durability, and integration with permanent infrastructure.
Land Use Zoning – Related terms #
Zoning Ordinance, Use‑Based Regulation. Zoning categorizes land into districts—residential, commercial, industrial—to control the type and intensity of development. Example a “R‑2” residential zone permitting two‑family dwellings. Uses: orderly growth, protection of compatible uses. Challenges: rigidity, unintended segregation, and need for periodic updates.
Low‑Impact Development (LID) – Related terms #
Green Infrastructure, Stormwater Management. LID employs decentralized, small‑scale techniques—rain barrels, vegetated swales—to manage runoff at its source. Example a residential subdivision with permeable sidewalks. Benefits: reduces peak flows, improves water quality. Challenges: design expertise, maintenance responsibilities, and code compatibility.
Mixed‑Use Development – Related terms #
Vertical Zoning, Live‑Work. Mixed‑use integrates residential, commercial, and sometimes civic uses within a single building or block to promote activity throughout the day. Example a ground‑floor café with apartments above. Advantages: walkability, reduced vehicle trips, and vibrant streetscapes. Challenges: financing, market demand, and managing diverse tenant needs.
Mobility‑Hub – Related terms #
Transit‑Oriented Development, Multimodal Integration. A mobility‑hub consolidates various transportation modes—bus, rail, bike‑share, car‑share—into a single node to facilitate seamless transfers. Example a downtown plaza that houses a bus terminal, bike lanes, and ride‑hail zones. Benefits: increased ridership, reduced congestion. Challenges: land acquisition, coordinating schedules, and ensuring accessibility.
Neighborhood Planning – Related terms #
Community Visioning, Participatory Planning. Neighborhood planning engages residents in shaping land‑use, design, and service delivery within a specific district. Example a resident‑led design charrette for a local park upgrade. Outcomes: tailored solutions, stronger social cohesion. Challenges: representation equity, reconciling divergent interests, and translating ideas into policy.
New Urbanism – Related terms #
Smart Growth, Walkable Communities. New Urbanism promotes compact, mixed‑use neighborhoods with pedestrian‑friendly streets, diverse housing, and public spaces. Example a master‑planned community featuring narrow streets, front porches, and a central square. Benefits: reduced car dependence and enhanced livability. Challenges: market acceptance, higher development costs, and retrofitting existing suburbs.
Open Space Planning – Related terms #
Parks and Recreation Planning, Greenbelt. Open space planning identifies, protects, and designs parks, trails, and natural areas within an urban context. Example a citywide network of green corridors linking neighborhoods. Advantages: health benefits, stormwater mitigation, and biodiversity. Challenges: land acquisition costs, maintenance funding, and competing development pressures.
Participatory GIS (PGIS) – Related terms #
Community Mapping, Spatial Justice. PGIS integrates local knowledge with geographic information systems to involve citizens in spatial decision‑making. Example residents mapping perceived unsafe streets. Applications: identifying service gaps, informing zoning changes. Challenges: technical capacity, data quality, and ensuring inclusive participation.
Pedestrian‑Friendly Design – Related terms #
Complete Streets, Human‑Scale Planning. This design prioritizes safe, comfortable walking environments through wide sidewalks, curb cuts, street trees, and traffic calming. Example a downtown corridor with raised crosswalks and benches. Benefits: health improvement, reduced vehicle trips. Challenges: reallocating road space, funding retrofits, and integrating with existing traffic flow.
Performance‑Based Zoning – Related terms #
Form‑Based Code, Outcome‑Driven Regulation. Instead of prescribing specific uses, performance‑based zoning sets measurable standards—e.g., noise levels, parking ratios—that developments must meet. Example a policy allowing flexible uses if a project limits night‑time noise to 55 dB. Advantages: encourages innovation. Challenges: monitoring compliance and establishing appropriate metrics.
Placemaking – Related terms #
Public Realm, Community Activation. Placemaking is a collaborative process that shapes public spaces to reflect local culture, foster social interaction, and create a sense of belonging. Example installing art installations and seating in a vacant lot to create a community plaza. Benefits: increased foot traffic, local pride. Challenges: sustained management, funding, and measuring social impact.
Policy Alignment – Related terms #
Cross‑Sector Coordination, Integrated Planning. Policy alignment ensures that housing, transportation, environmental, and economic policies reinforce each other rather than conflict. Example synchronizing a city’s affordable housing mandate with its transit expansion plan. Benefits: coherent development outcomes. Challenges: inter‑agency silos, divergent political agendas, and complex evaluation.
Public‑Private Partnership (PPP) – Related terms #
Joint Development, Infrastructure Finance. PPPs contract private sector expertise and capital to deliver public infrastructure or services, sharing risk and reward. Example a privately financed bridge with a long‑term maintenance contract. Advantages: accelerated delivery, innovation. Challenges: contract complexity, ensuring public interest, and transparency.
Quality‑Driven Development – Related terms #
Design Excellence, Performance Standards. This approach emphasizes high‑quality architectural and urban design outcomes as a development prerequisite, often linked to incentives. Example granting a density bonus for projects that achieve LEED certification. Benefits: elevates built environment standards. Challenges: cost implications, subjective assessments, and enforcement.
Resilience Planning – Related terms #
Climate Adaptation, Risk Management. Resilience planning prepares cities to absorb, recover, and adapt to shocks—floods, heatwaves, economic downturns. Example integrating flood‑resilient housing designs in a coastal community. Tools: hazard mapping, redundancy, and community capacity building. Challenges: uncertain future conditions, financing, and integrating resilience into existing plans.
Right‑of‑Way (ROW) – Related terms #
Public Easement, Transportation Corridor. ROW is a legal right to construct and maintain infrastructure such as roads, utilities, or railways on a designated strip of land. Example a 30‑foot highway corridor. Uses: ensures continuity of essential services. Challenges: acquisition negotiations, compensation, and impacts on adjacent properties.
Smart Growth – Related terms #
New Urbanism, Transit‑Oriented Development. Smart growth promotes compact, walkable, and mixed‑use neighborhoods while preserving open space and reducing dependence on automobiles. Example a city adopting infill policies and bicycle networks. Benefits: environmental sustainability and livable communities. Challenges: political will, market forces, and community acceptance.
Special‑Purpose District – Related terms #
Improvement District, Tax Increment Financing (TIF). These districts are created to fund specific public improvements—streetscape upgrades, parks—through levied assessments or tax increments. Example a downtown revitalization district that funds façade improvements. Advantages: targeted financing. Challenges: equitable benefit distribution and long‑term fiscal impacts.
Strategic Environmental Assessment (SEA) – Related terms #
Environmental Impact Assessment, Policy Integration. SEA evaluates environmental consequences of policies, plans, or programs rather than individual projects, ensuring sustainability at the strategic level. Example a SEA of a regional transportation corridor plan. Benefits: early identification of impacts, better alternatives. Challenges: data breadth, stakeholder coordination, and integrating findings into decision‑making.
Suburban Retro‑fit – Related terms #
Urban Infill, Transit‑Oriented Development. This concept involves transforming low‑density, car‑dependent suburbs into more compact, mixed‑use, and transit‑accessible neighborhoods. Example adding a town‑center with shops and higher‑density housing near a commuter rail station. Benefits: reduces sprawl and car trips. Challenges: existing infrastructure constraints, community resistance, and financing.
Sustainable Development Goals (SDGs) – Related terms #
Global Framework, Local Agenda 21. The SDGs are a set of 17 international objectives—including affordable housing, sustainable cities, and climate action—guiding planning toward holistic sustainability. Example a municipal climate action plan aligning with SDG 11 (Sustainable Cities). Uses: benchmarking, reporting, and attracting funding. Challenges: translating global targets to local contexts and measuring progress.
Transit‑Oriented Development (TOD) – Related terms #
Mixed‑Use Development, Density Bonus. TOD concentrates higher‑density, mixed‑use buildings within a walking radius of high‑capacity transit stations to maximize ridership and reduce car use. Example a 5‑story residential building with ground‑floor retail adjacent to a metro station. Benefits: increased transit revenue, vibrant neighborhoods. Challenges: land cost, parking management, and ensuring affordability.
Urban Acupuncture – Related terms #
Strategic Intervention, Place‑Making. This approach targets small, precise interventions—such as a pocket park or street mural—to catalyze broader urban regeneration. Example converting a vacant lot into a community garden that spurs adjacent property improvements. Advantages: low cost, community empowerment. Challenges: scaling impact and coordinating with larger plans.
Urban Design Guidelines – Related terms #
Form‑Based Code, Design Review. Guidelines provide detailed recommendations on building massing, streetscape, materials, and public realm to achieve a desired urban character. Example a handbook specifying brick façade colors for a historic district. Benefits: consistent aesthetic, easier approvals. Challenges: flexibility, enforcement, and balancing creativity.
Urban Heat Island (UHI) Mitigation – Related terms #
Green Roofs, Cool Pavements. UHI mitigation strategies reduce temperature differentials caused by dense built environments through vegetation, reflective surfaces, and shading. Example installing tree canopies along a downtown corridor. Benefits: lower energy demand and improved public health. Challenges: maintenance, upfront costs, and retrofitting existing streets.
Urban Morphology – Related terms #
Spatial Structure, Pattern Analysis. Urban morphology studies the form, layout, and evolution of cities—street patterns, block sizes, and building typologies—to inform planning decisions. Example analyzing grid versus curvilinear street networks. Applications: guiding infill design, preserving character. Challenges: data collection and translating findings into policy.
Urban Renewal – Related terms #
Redevelopment, Slum Clearance. Urban renewal involves large‑scale redevelopment of deteriorated areas, often using public investment and incentives to attract private development. Example a city’s revitalization of a former industrial district into a cultural hub. Benefits: economic revitalization and improved amenities. Challenges: displacement, loss of heritage, and community opposition.
Urban Sprawl – Related terms #
Exclusionary Zoning, Low‑Density Development. Sprawl describes dispersed, low‑density, automobile‑dependent growth extending beyond the urban core. Example single‑family subdivisions beyond the city fringe. Impacts: increased infrastructure costs, habitat fragmentation, and higher emissions. Mitigation: growth boundaries, infill incentives, and transit expansion.
Vacancy Rate – Related terms #
Housing Market Indicators, Absorption Rate. The vacancy rate measures the proportion of unoccupied housing units, indicating market health. Example a 5 % vacancy suggesting a balanced market. Uses: informing zoning adjustments and affordability strategies. Challenges: data timeliness and regional variations.
Value Capture – Related terms #
Tax Increment Financing (TIF), Impact Fees. Value capture recovers a portion of the increased property values generated by public investments—like new transit—to fund related infrastructure. Example a levy on increased property taxes in a TOD area. Benefits: aligns financing with benefits. Challenges: accurately quantifying uplift, legal constraints, and equity concerns.
Walk Score – Related terms #
Accessibility Index, Transit‑Oriented Development. Walk Score is a numeric rating of a location’s pedestrian friendliness based on proximity to amenities and street connectivity. Example a downtown address with a score of 95 indicating high walkability. Applications: guiding infill priorities and marketing. Challenges: does not capture safety, quality of sidewalks, or accessibility for people with disabilities.
Wayfinding – Related terms #
Signage System, Urban Legibility. Wayfinding design helps users navigate complex environments through clear signage, landmarks, and spatial cues. Example a color‑coded trail system in a park network. Benefits: enhanced user experience and reduced congestion. Challenges: maintaining consistency, updating for changes, and accommodating diverse user groups.
Zoning Overlay – Related terms #
Form‑Based Code, Special‑Purpose District. A zoning overlay adds additional regulations—such as design standards or density bonuses—to existing base zones without altering the underlying land‑use classification. Example a historic overlay that requires façade approvals in a designated area. Advantages: targeted control and flexibility. Challenges: added complexity, administrative burden, and potential conflicts with base zoning.