When you're hiring a painter or decorator, it's important to do your research and ask around. Here are a few tips to help avoid making mistakes when hiring:

1. Be sure to specify what you want done: If you haven't decided yet, get ideas from friends or family and make a list of the things you would like completed. This will help the contractor know exactly what they need to start working on. To know more about painting and decorating services in London, you can also visit https://www.artofwalls.uk/.

2. Ask for references: A good contractor will be happy to provide you with names and contact information for previous clients, so you can verify that they are reputable and capable of completing the job satisfactorily.

3. Get estimates in writing: Before handing over any money, be sure to get an estimate in writing from the contractor, specifying all details such as labour rates, materials costs, and timeframes. This way, there is no confusion or disagreement after the project is completed.

4. Inspect the work before it's finished: Once the work has been completed, inspect it carefully for any damage or errors that may have occurred during the painting or decorating process. If there are any problems, not only will this cost you time and money to fix them, but it could also reflect poorly on your home décor skills in front of future guests!