I have several Sarracenias and a Venus Fly Trap which live permanently outdoors, they are completely hardy as they come from parts of the USA which have very cold winters. They catch far more flies than they would indoors! Some Sundews are also fully hardy - they are native British plants. They will certainly all be happy in a greenhouse.
We never managed to keep Nepenthes longer than a few years as the ones we had did need much warmer and more humidity than the orchids we also grow, in the area that they were in. Sitting the Nepenthes on a gravel tray and spraying each day will help to increase the humidity.
Your Drosera is doing a great job by the looks of the flies on the "dew".
I don't think they need repotting yet but when they do you will need to buy compost that is specific for the 2 different carnivorous plants. Not something you can get at a garden center but there are carnivorous nursery around and these are the people to advise you on which compost.
Our Sarracenia, Sundew and Venus Flytrap all stay in the unheated greenhouse all year round. The Sarracenia used to be left outdoors all Winter, with no problems.
We use to use Spaghnum moss for them all, however our local garden centre only sells wood moss, and I use that. They all thrive with that, but I only repot in Spring, it's too late to do now.
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Afraid I know nothing about carnivorous plants, but I think yours look really nice
We use to use Spaghnum moss for them all, however our local garden centre only sells wood moss, and I use that. They all thrive with that, but I only repot in Spring, it's too late to do now.