Garden sheds, summer houses, garden workshops and log cabins are normally situated down at the bottom of the garden and isolated from your home but this does make these buildings a little vulnerable to being broken into. So if possible you need to make plans to improve this weakness, if possible. By doing so you will be protecting all your items, which have been put into the shed, from being stolen.
Where ever possible when choosing a new garden shed try to ensure it can be viewed from the house as this will make any potential burglars be a little more cautious. However, this is not always possible so try to make the shed and its surroundings more visible so there is not any dark spots around it.
It's not always possible to have electric running to the shed but you can buy solar powered lights which can do a good job in its place. These work quite well, even in the winter, and will help to illuminate the shed making it less hidden I believe you can even get solar powered infra red lights which work on body movement so this will conserve energy until required.
Also on the agenda in protecting your garden shed is a good lock. This can be a simple lock from Poundland which will help, a little, if a intruder tries to get into your shed, however it's best to spend a little more on a good quality lock as this will make it harder to break. Add in a strong 'fold over' hasp and staple secured with security screws or with a nut and bolt.
A 'fold over' hasp and staple is one where the hasp part of it, when closed, will cover all the screws on the staple. This means this can't just be unscrewed. Many people don't realise this and just screw a hasp and staple in place, they then put a super duper lock on it thinking they are safe. The burglar will then come along and with just a screwdriver can gain access into your garden shed and steal your valuables. The lock will remain locked and totally useless.
Add nut and bolts to the hinges as well to ensure the doors can't just be unscrewed and you will make life unbearable for these intruders. Or you can ensure that all the screws are covered from outside and, if you do, will give similar protection. The garden shed windows can also be a weak point so, if possible, try to fit security bars or wire mesh over the windows. This will mean that access into your shed through there is not possible. At the very least cover the windows on the inside with a blind or curtain as this will remove the temptation.
Valuable items inside the garden shed should be locked with chains fixed into the floor or to the walls. Alternatively by chaining your valuables, such as bikes, lawn mowers and other garden items TOGETHER, this will make it very difficult for these to be taken away.
However, the best bit of advice is to keep the access to your garden and garden shed securely closed and locked. By doing this you will stop anybody getting close to your shed and will ensure the contents remain safe. Always ensure it's closed and locked, especially as the nights get longer, and don't be complacent. It's all too easy to do that.
By being careful you can ensure that you shed is not part of any news stories issued by the police where many valuables have been stolen. On a very regular basis this happens and, frustratingly, most of these burglaries could have been avoided.