When looking to acquire the services of an electrician, keep in mind never to compromise the safety of your family, property, and neighborhood. Never leave anything to chances as the risks are too great and irreparable. This is why you need to make a good choice and good judgment when you are conducting research and asking for references.
Whilst it is important to ask for an estimate before an electrician can commence work, do not expect to be given an exact estimate unless the site of the job was physically inspected. Furthermore, do not expect that by talking over the phone, a contractor will be able to diagnose the scope of your electrical problems.
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When it comes to electrical work, it is never considered a good idea trying to lower the cost down by performing your own home or office electrical work or settling for the inexperienced electrician that charges very cheap labor.
This act is actually a very expensive risk to take and the worse part is that you will be held accountable when something happens and when the authorities find out that the electrical work performed does not in any way conform to the codes and laws.
Look for an electrician who is updated on the latest version of the consensus standard developed by the National Electrical Code and the National Fire Protection Association. They have a new version that is published every 3 years with the key concept to establish the minimum requirements for all electrical installations to ensure they adhere to safety considerations.