Kettering General Hospital will temporarily increase its all-day parking charge to £20 while work on the second deck of Car Park B takes place.
From June 5, parking for more than four hours in Car Park A and more than six hours in Car Park B will incur the new charge, up from £8.20.
Those parking in Car Park B for between four and six hours will be charged £8.20.
A KGH spokesman said: “We know that over the past few months the parking situation has been really difficult at KGH as changes to the road layout have been introduced to prepare for a new car park deck.
“We are sorry for the disruption and inconvenience this has caused.
“We are now entering the final phase of our plans with work commencing in mid-June on the construction of a new parking deck on Car Park B.
“Once this is installed there will be an additional 240 spaces on the main hospital site which will reduce the congestion problems that have caused so much frustration for our patients and visitors.”
In instances where patients or visitors have had to stay on site for longer than six hours due to a medical emergency, attending a birth or other situations that make it impossible to leave, arrangements are in place for them to have their charge reduced to the six-hour fee of £8.20 by the car park office upon production of ward or departmental confirmation.
Any visitor finding themselves in this position should ask the ward or department for a form which can be taken to the car park office to ensure that only the six-hour fee is charged.
It is expected that the temporary charge will be in place for four months until work ends.
An internal email was leaked on social media which said the charge would come into place as of May 22 (yesterday), but that is not the case.
KGH says the £20 parking fee for longer than six hours is designed to discourage staff from parking on-site in visitor car parks.
The spokesman added: “Alternative parking for staff is available at Robinson Way or Trafalgar Road Car Parks – both of which are a short walk away from the main hospital site.
“These car parks are charged at a lower rate than the main hospital car parks and a minibus is provided at key times of the day to transfer staff from Robinson Way if they would rather not walk.
“Night staff will not be affected by these changes and will continue to be able to access parking in Car Park E.”
The hospital will also be re-instating a taxi drop off area within the bays adjacent to Thorpe House.
Bosses also say that an emergency drop-off zone remains outside A&E and apologised if this was not clear.
When construction work begins, visitors will be able to park in Car Park C.
The spokesman added: “From mid-June, while construction work takes place, staff currently using Car Park C will be relocated to the crematorium and old Northants Telegraph office car parks off site, releasing this car park for our patients and visitors as a replacement for the temporary loss of parking spaces from Car Park B.
“We are sorry for the temporary inconvenience that this will cause our staff but, with limited parking available on site, we must give priority to patients and visitors.
“Once we have gained the additional parking spaces after works on Car Park B are complete we will remove the £20 parking fee and reinstate the all-day parking charge.”