Housing in ESO is a satisfying pursuit. Houses can be bought for in-game gold and Crowns. Furnishings can be crafted, bought from other players or bought for Crowns.
Everyone is entitled to one free inn-room (via a quest picked up in any in-game bank), either associated with your Alliance, or the chapter you started with. These can hold 15 items (30 with ESO Plus). They can give you a taste of housing but are hard to decorate in such a way that they feel "home" due to their limited item count.
The rest of the inn-rooms are available to buy for 3000 gold.
Houses are available for both in-game gold and Crowns. Item counts below are with and without ESO Plus. Crown costs below are unfurnished and furnished. Full list can be found at UESP.net.
Each new DLC and Chapter release I put out a series of videos showcasing the new houses and furnishings. The videos are compilated in a master listing, as well as listings for each new DLC/Chapter.
Check back regularly for new content!
The Public Test Server is available to install for all players with a PC/Mac account (assuming they have enough hard-drive space to install). On the PTS server all house and housing item costs are set to 1 Crown and each account is provided with 5500 Crowns that reset daily.
This means you can put together extravagant designs with no financial restrictions which is very satisfying. Do be aware that all progress will be wiped every 2 weeks (approximately) as EU then NA accounts are copied onto the server for test purposes.