I suggest it is unlikely to be cost-effective to convert it and it is probably going to be cheaper to demolish and build from new, or replace with a jackleg cabin meeting Building Regulations.
If you need to find a tradesperson to get your job done, please try our local search below,
or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local