New Build Boost is not like Shared Ownership and there will only be one charge over the property, ours, like with a normal mortgage.
If you buy with New Build Boost, you'll own the property outright and will build equity with each monthly payment and when you repay the interest-free boost.
The boost is an interest-free equity loan that is frozen for first 5 years. (You can read our scheme explainer for more detail.)
But this equity loan doesn't mean that anyone else has equity in your home.