- CPTED stands for Crime Prevention Through Environmental Design
- CPTED focuses on the physical design of your neighborhood - fencing, lighting, plantings - to identify areas or elements that may have the potential to attract crime.
- It focuses in the areas of Natural Surveillance, Natural Access Control and Territoriality/Defensible Space
CPTED promotes and prioritizes increased visibility in and around a property to deter burglars and thieves, who frequently target areas and residences with low visibility. This can be counteracted in the following ways:
- Lighting - street lights should be well spaced and in working order, alleys and parking areas should also be lit. Lighting should also reflect the intended hours of operation, i.e. lighting of playfields or structures in local parks may actually encourage after hour criminal activities. Motion-sensing lights perform the double duty of providing light when needed and letting trespasser know that "they have been seen."
- Landscaping - Generally uniformly shaped sites are safer than irregularly shaped sites because there are less hiding places. Plants should follow the 3-8 rule of thumb; hedges no higher than 3 feet, and tree canopies starting no lower than 8 feet. This should is especially important around entryways and windows.
- Fencing - Fences should allow people to see in. Even if the fences are built for privacy, they should be of a design that is not too tall and has some visibility.
- Windows - Windows that look out on streets and alleys are good natural surveillance, especially bay windows. These should not be blocked. Retirees, stay at home parents, and people working from home offices can provide good surveillance for the neighborhood during the day.
Natural Access Control
Access Control refers to homes, businesses, parks and other public areas having distinct and legitimate points for entry and exits. However, this should also be balanced to avoid "user entrapment," or not allowing for easy escape or police response to an area. Generally crime perpetrators will avoid areas that only allow them with one way to enter and exit, and that have high visibility and/or have a high volume of user traffic. This can be assured by:
- Park designs with open, uninhibited access and a defined entry point. A good example is a park with transparent fencing around the perimeter, and one large opening in the gate for entry. Putting vendors or shared public facilities near this entrance creates more traffic and more surveillance.
- Businesses with one legitimate entrance. Avoid recessed doorways.
- A natural inclination is to place public restrooms away from centers of activity, but they can become dangerous if placed in an uninhabited area. Restrooms that are down a long hallway, or foyer entrances with closed doors, are far away from the entrance of a park, or are not visible from the roadway can become problem areas.
- Personal residences with front and back doors that are clearly visible and well lit.
Territoriality means showing that your community "owns" your neighborhood. While this includes removing graffiti and keeping buildings and yards maintained, it also refers to small personal touches. Creating flower gardens or boxes, putting out seasonal decorations, or maintaining the plants in traffic circles seems simple, but sends a clear message that people in your neighborhood care and won't tolerate crime in their area. These kinds of personal touches work in business communities as well. More complex design efforts can also be undertaken for more dramatic changes. These are some things that should be considered when planning for future growth:
- Front porches and apartment balconies add to street surveillance.
- Traffic plans that consider the size of the neighborhood. People drive by "feel" more than speed limits, so a wide, two lane residential street can lead to speeding. Traffic circles, or increasing the size of curbs can help to calm traffic.
- Institutional architecture that respects the neighborhood identity and matches the current scale of the neighborhood.
- Clear transitions between private, semi-private and public areas.