The staycation specialist is hoping for a July green light from government, and could potentially resume operations from 4 July.
Henrik Kjellberg, chief executive of Hoseasons parent Awaze UK, this week told TTG he was confident that if the operator gets the go-ahead from government, it would sell out.
He also said after turning partner sales channels back on last month, he was keen for the trade to help sell as much Hoseasons product as possible.
Third party bookings are up 250% week-on-week as of Friday (12 June), and the business is currently planning to expand its partner programme to all agents as demand increases.
In terms of product, online lodge bookings are up 20% week-on-week, while cottage holiday bookings are up 35% and have doubled over the past fortnight.
Search data also shows sharp increases in demand for lodges, up 31% week-on-week, while park searches are up 27%.
Awaze UK sales director Sally Henry said: “Everything we are seeing points to an increasing appetite for UK breaks.
"The recent easing of some lockdown restrictions has clearly boosted people’s confidence that they will be able to enjoy a holiday at home this year after all.”
Hoseasons will shortly embark on a £1.5 million TV and digital advertising campaign aiming to "kick-start the summer"; all audiences will be targeted, with the campaign focusing on the "amazing places" on people’s doorsteps.
It will additionally highlight a new money back guarantee, ensuring customers can get a full refund if the company has to cancel their holiday at a later date.
Hoseasons has also launched a new "safer stays" initiative allowing locations to sign up and confirm extra cleaning protocols and social distancing measures.