MrHappyChap wrote:
If a terraced house (in an area popular with first time buyers) has a
kitchen extension with a flat roof, would the construction of a
"regular" roof usually add value to the house?

i.e. add more to the value of the property than the cost of
constructing the roof

Anyone have any opinions?

You wouldn't be adding a new facility that the property needs. I doubt
an estate agent would value the house any higher, and it's not something
that's going to be on a buyers list of requirements. It might possibly
improve the chance of a sale going through if the existing roof looks
bad. But it's not something that's cheap or easy. If you're looking to
add value, I'd look elsewhere IIWY.

-Duncan