In theory an increase in your home's value should reflect in the GDP as an increase in imputed rents. Even though you might not actually pay a rent because you

In theory an increase in your home's value should reflect in the GDP as an increase in imputed rents. Even though you might not actually pay a rent because you're a home owner, as far as national accounting is concerned you do pay a rent to yourself, and such a rent is part of the GDP.