Leasehold property owners are paying £319 in ground rent costs every year, totalling £447million, figures show.
And one in ten say these costs are affecting their quality of life, the report by NAEA Propertymark found.
The results showed up in a survey of 1,000 leaseholders amid the scandal which has left thousands of Brits facing escalating ground rent, extortionate fees for making cosmetic alterations like changing their front door, and unable to sell their homes.
NAEA Propertymark said freeholders typically charged home owners £1,422 to install double glazing, £887 to change the kitchen units, and £689 to replace the flooring.
Some faced bills of £527 for changing their blinds and £411 for installing a new front door.
Today’s figures show more than a third of leasehold property owners would not be able to afford to live in their home if their ground rent was to increase, while 6% already feel like they can’t afford it because of the cost.
Of this group, one in 10 have seen their ground rent rise since moving in, typically after just seven years.
One in five of them did not understand the details at the time of the rise and 46% said if they had known it was going to increase, they may not have purchased the property.
It comes after figures in September suggested 94% regret buying a leasehold and 62% feel they were mis-sold.
“Buying a home is one of the biggest financial and emotional investments we make in our lifetime, and once we’ve completed and moved in, we should be able to enjoy the property,” explained Mark Hayward, chief executive, NAEA Propertymark.
“But unfortunately for those buying leasehold houses, the financial burdens continue with ground rent payments to the freehold every year.
“Even though many leasehold contracts include a ‘ten-year ground-rent freeze’, most developers sell the freehold onto a third party within a few years of completion and those terms go out the window, meaning homeowners are faced with unexpected and escalating costs.
“It’s positive to see action being taken, with the recent announcement that the CMA will be investigating the mis-selling of leasehold properties, as for too long, housebuilders and developers have not been transparent enough about what it actually means to buy a leasehold property.
Wanda Goldwag, at the Leasehold Advisory Service, added: “Large escalations in ground rent only serve the commercial interests of developers and investors, and the Government intends on limiting ground rent on new properties in the future.
“In the meantime, some developers and investors have recognised the unfairness of ground rent increases in leases and established schemes to assist leaseholders.
“If you are unsure about your ground rent and whether it increases, please get in touch with us at Lease.
“We can review the lease and establish if there is an escalating ground rent and whether your freeholder is a signatory to the pledge unveiled by the Communities Secretary, James Brokenshire MP, on 28th March, to assist existing leaseholders trapped in onerous deals.”