Adam Terry from the charity Shelter who carried out the research says in some cases it has been a matter of hours following a complaint that the landlord has decided to evict the renter.
Thousands of people in the South West are scared to ask private landlords for repairs, in case they get evicted.
The housing charity Shelter says 1 in 12 people keep quiet about problems. Three per cent of tenants in the South West also said they had been evicted for complaining to landlords.
The housing market in the South West is now booming thanks to a boost in the economy and a number of Government incentives.Read the full story ›
House sales in the South West have hit a five year high. According to a survey by the Royal Institution of Chartered Surveyors, the number of homes sold in the region is at the highest level since February 2008.
And from today any property worth up to £600,000 could be eligible for the government's Help to Buy scheme.
Somerset Correspondent, David Woodland reports
There are signs the South West housing market is continuing to recover.
According to a survey by the Royal Institute of Chartered Surveyors, the number of homes sold in the South West is at the highest level since February 2008, and it is higher than than the UK as a whole.
Prices also continued to rise, with nearly half of people reporting an increase. The report says predictions for the future are upbeat.
Demand for houses in the South West rose at its fastest rate since summer last year, according to a survey by the Royal Institute of Chartered Surveyors.
Despite this, prices continued to fall, although the RICS said the amount of homes coming onto the market also improved.
Whilst rent in the private housing sector reached another new high last month, the South West has bucked the trend, with rates dropping by 1.5% annually.
Demand for rental homes has rocketed in the last year as people struggle to get on the property ladder because they cannot raise a deposit or meet lenders' toughened borrowing criteria.
Although rents increased by 3.2% nationally to an average of £741pcm, rates in the South West fell to an average of £638.
The findings come a day after the Money Advice Trust announced that a record 12,000 tenants were struggling with arrears had contacted its national debtline this year - the biggest number in its 26-year history.
A parish council has been granted the right to mount a High Court challenge to plans for a controversial housing development near a quiet Cornish village.
Lanner Parish Council says the 25-home affordable housing development on land close to the village, near Redruth, goes against published planning policy.
"It is not for me to decide whether, in the end, it succeeds, but it is clearly arguable that there has been a failure to appreciate that this is outside the policy and thus there would be a positive requirement to explain why, in those circumstances, notwithstanding it is contrary to the policy, it is appropriate to grant permission.
The judicial review challenge is likely to go before the High Court in the autumn.
Residents old and new from Plymouth's North Prospect Estate have been sharing their memories of living there. The reunion comes as much of the estate is being rebuilt in a ten year regeneration programme.
Many of the streets now resemble a ghost town as more and more residents have been relocated ahead of demolition.
Teignbridge District Council has approved plans for 65 new homes on a green-field site in Exminster. Residents had previously said the properties would put too much strain on local amenities and the village school.