When I was in California in November, I looked at a couple of houses in the areas we want to live to get an idea of what was available. Two of the houses I looked at were particularly nice and I could certainly imagine them being suitable for us all when we move. Unfortunately, as is the way with the rental market, they were both available immediately and so I was reluctant to commit to anything when it would cost us another couple of months extra rent.

The first house was in the Cambrian area which is just between Campbell & Willow Glen, the two main places we are looking. We are looking at four bed houses so that we have enough room for people to stay, which we are expecting to be a fairly common occurrence.
This house was a good size and had an excellent garden complete with veranda, climbing frame and tree house. Inside it was a little tired, but perfectly livable.
Some other areas you look at you can get more space for your money, and there are also plenty of places with pools, but then you are compromising on location and these are the areas we like.

The second house I looked at was just a couple of blocks away from the first, and was a much more modern house. Also a four bed, the downstairs was open plan with double height ceilings, and the bedrooms were all upstairs. Its almost impossible to find a house without a double garage either!
While this second house was very nice, the garden was a little smaller than the first, but still perfectly adequate. It also didn't have a family room which would be a nice bonus to have.
One thing you do notice is that the houses generally are much larger than the equivalent in the UK. They are also almost all detached.
When looking for property, there is practically one resource that everyone seems to use,
Craigslist, and it is very good. It's basically a free listings site, but is constantly updated and seems to be the only place to find rentals as they don't seem to have agencies for rentals - only realtors for property purchases.
I'll be back in Cali at the end of next week with a view to finding and signing up a property where we will live to begin with. As we are shipping our stuff out from the UK, it will take 6-8 weeks to arrive so there are some things (like beds!) that we will need to buy in the meantime, so having the house a little in advance will have some benefits.