Adding or repairing a doorbell on or near your door can be as simple as adding a battery-operated wireless model or wiring in a bell that works from your mains electricity and chimes in various rooms in the house. Any good builder should be able to assist with a basic doorbell set up, although you will need an electrician to do the job if you want something more complex.
In either case the job should not take long and will be of minimal cost. If your current doorbell is faulty then your tradesman should be able to find the fault and repair it, or simply replace the bell if a repair is not possible.
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