I am genuinely curious (and not wanting to start a Conservatorista/Non-Conservatorista fight! ).
We've viewed a lot of houses recently that have one attached, and the estate agent sort of unveils them with a lot of 'ta-da-ing', like it's the high point of the house. They do seem to enable vendors to add a hefty chunk to the asking price, but why are they so desirable?
In all, and I mean all, of the houses with conservatories we've seen, there are blinds or apparatus to cool them down in summer - blinds or opaque stuff on the ceiling, blinds down the sides, air con fitted in some cases... We've viewed this summer, so mostly the impression is of a sweltering pit. However, I've also been in houses with conservatories in winter, and then it's more a case of really not wanting to be in there because of the cold. Several we've seen this summer have both air con and plug-in heaters.
So you end up maxing on your heating and electricity bills all year round! Some houses we've seen, you'd have to use it all year round because it's the dining room. Others, the conservatory is open-sided onto a room in the house, so god knows how you'd stop the ground floor overheating in summer or leaching cold in winter.
I mean, I like sunshine and being warm as much as the next person, but conservatories seem a waste of space and fuel to me. Can anyone convert me to the conservatory cause?