Increasing the height of boundaries may be illegal, so check with your local government first. However, it is possible to increase the privacy within your own yard without altering the boundaries themselves. Consider using trellises and pergola covers, which can support climbing plants, create privacy without blocking light to the rest of your garden and help create a sheltered microclimate by allowing air to pass through.
Well-placed plantings frame secluded sites for seating areas; an umbrella can give additional privacy when the table is in use.
While new trees can take time to grow and fast-growing hedges are high-maintenance, temporary screens give instant privacy. A makeshift cover like this one creates shelter and privacy wherever it is needed, and can be conveniently packed away.
Although we all want some privacy, it is important to maintain good relations with your neighbors. One way to avoid problems when designing boundaries is to consider anything which could irritate your neighbors, intrude into their space or block their light.
Low fences encourage communication and friendship between neighbors while also allowing more light into both gardens.
Boundaries provide security, but it is best to strike a balance between imprisoning yourself and opening your garden to your surroundings. Spiky evergreen shrubs can form attractive barriers that will deter most intruders.
Firethorn is a good choice for a burglar-proof screen, but will take time to grow; combine it with a simple post and wire fence until it matures, then keep it to under 6 feet in height.