Nobody likes to be taken for a fool but it is often hard to realise that it is happening. Hopefully some of these points will help you avoid coming across any cowboy builders.

1. Go into the project with a plan and obtain planning approval where necessary
2. Make a shortlist of contractors that suit your needs so far. It is often best to ask around and gain word of mouth recommendations.
3. Obtain references if possible from the builders. Any good builder will be able to provide a reference
4. On receiving quotations keep in mind that the cheapest is not always the best.
5. Agree on a written contract with the builder outlining the exact details of the job and dates as to when it will be done. This usually only applies to larger jobs however is a good method of security fore any job.
6. Make payment agreements. This should also be outlined in the contract. Often staged payments make sure that you stay in control of the project.