People who have been in contact with confirmed coronavirus cases may get a knock on their door if tracers are unable to reach them over the phone.
Health officials have announced plans to strengthen regional test and trace powers in England.
In pilot schemes, this has meant that local authorities have been able to visit people at home where national contact tracers have been unable to reach them.
NHS Test and Trace will provide local authorities across England with a dedicated team of contact tracers for local areas.
NHS Test and Trace, Public Health England and local authorities will be able to work together to ensure more people are reached, the Department for Health and Social Care said.
Officials said that local areas will be given "ring-fenced teams from the national service".
And if the dedicated national team cannot make contact with a person in a set amount of time, the local public health officials can use the data provided by NHS Test and Trace to follow up.
There has been criticism that some contact tracers have contacted just a handful of people.
But DHSC said that staff numbers can "quickly scaled up, or down depending on requirements for the national service".
Baroness Dido Harding executive chair of NHS Test and Trace said: "NHS Test and Trace is one of the largest contact tracing and testing systems anywhere in the world, and was built rapidly, drawing on the UK's existing health protection networks, to stop the spread of coronavirus.
"At the height of the pandemic we ensured the system had extra capacity in place to cope with potential peaks in the virus.
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"We have always been clear that NHS Test and Trace must be local by default and that we do not operate alone – we work with and through partners across the country.
"As we learn more about the spread of the disease, we are able to move to our planned next step and become even more effective in tackling the virus.
"After successful trials in a small number of local areas, I am very pleased to announce that we are now offering this integrated localised approach to all local authorities to ensure we can reach more people in their communities and stop the spread of Covid-19."
All the data from national and local teams will be fed into the same system, DHSC said.
It added that the national service will move from 18,000 to 12,000 contact tracers on August 24 with remaining teams to be deployed as part of dedicated local tracers.
Meanwhile, Public Health England's local health protection teams have doubled in size and will increase further ahead of winter, DHSC added.
It said that there are 200 mobile testing units already in operation and over 200 walk-in centres will be opened across the country by October.
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Commenting on the announcement, Keith Neal, emeritus professor in the epidemiology of infectious diseases at the University of Nottingham, said: "The biggest issue has been that 20-25% of cases have not been contactable. Allowing local authorities to chase up will ensure more are contacted.
"Visiting houses will help but there is no mention as to what they will do if they are not isolating for 10 days as they should be.
"The advantage of a national system is that it can divert resources to hotspots. In some places there are very few cases, others have many more, so there is likely to be a capacity issue in some areas. A centralised system can divert resources where they are needed more efficiently. Whoever makes contact needs to keep the local PHE team informed of the results.
"The key step is that local Public Health England teams oversee this as local authorities are too small and in some places three or four authorities are within a few miles of each other. The local authorities cannot continually be checking with each other about cross-border issues which is where the local PHE teams are needed to co-ordinate."