My niece used the help to buy for her house. She had it valued last week and its increased by 40k in two years. She'll move soon but you have to pay something back, not too sure if its the deposit. Think if you sell in the first five years you pay something back.
With help to buy, the government loan you a % up for 20% of the value of your home, which opens you up to much lower interest rates because you have a higher LTV. you basically owe the government whatever % of the property value that you took as a loan. Eg we paid a 7% deposit, and took the 20% help to buy loan, then a mortgage for 73%. If house prices go up, the value of the loan goes up, if they go down the value goes down
the loan is interest free for 5 years, then you pay interest on it after that unless you pay it off/remortgage to take it into the mortgage/sell.
It’s good to get on the ladder, but you pay a premium for it in the price of new builds, and it’s much harder to pay off/move in the future