CRIME PREVENTION THROUGH
ENVIRONMENTAL DESIGN (CPTED)
Introduction
Research has shown that the proper design and effective
use of the built environment can lead to a reduction in both the opportunity
for crime and fear of crime. Through their involvement in design and construction,
architects, planners and builders can influence the creation of safer
neighbourhoods and communities. This pamphlet provides a general overview
of Crime Prevention Through Environmental Design (CPTED) for professionals
who work in urban design development and related areas. It is not meant
to be an exhaustive analysis or a checklist.
What is CPTED?
CPTED is an approach to planning and development that
reduces opportunities for crime.
Communities, neighbourhoods, individual homes, and other
buildings, streets, and parks can all be made safer through the application
of design principles that make it more difficult to carry out inappropriate
activities.
CPTED can reduce crime and fear through:
- Territoriality - fostering residents interaction,
vigilance, and control over their neighbourhood
- Surveillance - maximizing the ability to spot suspicious
people and activities
- Activity support - encouraging the intended use of
public space by residents
- Hierarchy of space - identifying ownership by delineating
private space from public space through real or symbolic boundaries
- Access control/target hardening - using physical barriers,
security devices and tamper-resistant materials to restrict entrance
- Environment - a design or location decision that takes
into account the surrounding environment and minimizes the use of space
by conflicting groups
- Image/Maintenance - ensuring that a building or area
is clean, well-maintained, and graffiti-free
What is the role of CPTED?
CPTED is part of a comprehensive approach to crime prevention.
By emphasizing modifications to the physical environment, it complements
community-based policing, Block Watch, and social programs that address
some of the root causes of criminal behaviour.
What are the main steps in CPTED projects?
- engage the support of residents and other key partners
- identify crime and disorder problems in and around
the site
- analyse current or proposed design based on existing
crime problems and potential criminal opportunities
- develop preventive or corrective design options
- carry out preferred option
- monitor and evaluate how the implemented option affects
crime, resident surveillance, interaction, and territoriality
- disseminate and promote evaluation results
When can CPTED be applied?
CPTED can be applied to identify and remove potential
problems in proposed developments. It can also be used to correct existing
design problems that may invite crime.
What are some CPTED tactics?
Neighbourhoods:
- minimize the number of entry and exit points on a
block
- design roadways to discourage through-traffic
- maximize residents ability to view public spaces
- encourage residents use of public spaces
- provide appropriate lighting for streets, paths, alleys,
and parks
- encourage residents to watch over each other
Houses:
- clearly delineate private property (e.g., yard, driveway,
walkway) from public space (e.g., street, sidewalk) through shrubbery,
alternate paving stone colour, and changes in grade
- provide unobstructed views of surrounding area
- ensure entrances are visible and overlooked by window
- avoid landscaping that may conceal offenders
- install bright security lights
- use solid-core exterior doors
- use solid door frames with proper strike plates
Apartment buildings:
- provide common spaces to encourage tenant interaction
- minimize the number of units sharing a common entrance
- equip entrances with an intercom system
- ensure hallways are well-lit
- install deadbolt locks and peep holes on unit doors
- provide childrens areas that can be easily observed
- provide windows that allow for surveillance in laundry
rooms
Parking lots and garages:
- avoid enclosed, underground, multi-story garages
- install bright lights over driving lanes and parking
spaces
- use paint to increase light levels
- control access and egress with automatic doors and
gates
- avoid pillars and recesses that may hide offenders
Public spaces:
- encourage use by legitimate users
- avoid placing dark, and or hidden areas near activity
nodes
- install appropriate lighting
- avoid placing covered outdoor areas where loitering
may be a problem
Who are other key CPTED partners?
CPTED works best when fully supported by the community.
Other key partners include:
- neighbourhood residents: who can make their communities
safer through participation in the development and implementation of
CPTED-based strategies for crime prevention
- new home buyers: who can ask for a home built to CPTED
principles
- apartment building managers: who can organize the
safety of tenants
- elected officials: who can encourage the integration
of CPTED principles into official plans, zoning by-laws and development
permits
- police officers: who can conduct CPTED assessments
in existing neighbourhoods and review applications for new developments
- insurance companies: who can offer discounts for safe
designs
What are some highlights of CPTEDs ongoing use?
- incorporation into local government crime prevention
plans (Toronto, ON; Edmonton, AB) and police mandates (Peel Region,
ON)
- application in the design of towns (Tumbler Ridge,
BC); neighbourhoods (Erin Mills, ON); public housing (Vancouver, BC);
parks (Lethbridge, AB); shopping malls (Langley, BC); schools (Brampton,
ON) and public libraries (Kitchener, ON)
- codification in building codes and zoning by-laws
(North York, ON; Vancouver, BC)
- encouragement of resident interaction and social cohesion
(Montreal, PQ)
- reduction of crime through better street lighting
(Toronto, ON)
Further Reading
Canada Mortgage and Housing Corporation and Royal Canadian
Mounted Police. (1996)
How to Lock Out Crime: Protecting Your Home Against Burglary
City of Edmonton (1995)
Design Guide for a Safer City
City of Toronto (1992)
A Working Guide for Planning and Designing Safer Urban Environments
Department of Justice (1996)
Building a Safer Canada: A Community-based Crime Prevention Manual
Wekerle, G. and C. Whitzman (1995)
Safe Cities: Guidelines for Planning, Design, and Management - Van Nostrand
Reinhold
YWCA Vancouver Housing Registry (1995)
Making your Suite Safer for Women - Safer for Everyone
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