If you want to get this on DVD, read on...
Unfortunately, the BBC have never bothered to release The Magician's House on DVD - along with a whole bunch of other family stories (I'd also like to get a DVD of their Sunday afternoon drama version of "Five children and It"). Their loss.
Thankfully, I bought it on video way back in 2000, and I just recently managed to find the boxsets again (my film and TV collection is basically just one huge pile o' videos. XD). I watched it again and I still loved every second of it.
If you'd like to get the complete The Magician's House on DVD (both seasons), it's now available through iOffer at the following address.
http://www.ioffer.com/i/the-magician-s-house-dvd-506969620
:)