Portal Chamber - This one is very handy as you can put in your house teleports with Spellbooks (regular, Lunar and Ancient) and RS Gold store them all together in one location. Because you'll have many portals at your house all you need to carry with you will be an iPad for your house.
Armour Stand - Unlike its name suggests Armour Stands aren't utilized only for decoration. This is where you can repair your Barrows equipment. This is why it's an absolute necessity to be equipped with one if you're using Barrows sets. Restoration Pools are very useful as they can help you recharge your running points, replenish your stats and can even replenish your health . For this you'll need 90 Construction.
Gilded Altar - You can learn the most effective way to pray in your home. After you construct Gilded Altar and light 2 candles at the edges of it every bone sacrificed there will be rewarded with 350% of the usual prayer experience. This is extremely beneficial for prayer training. Although you can access these altars through other houses , it's more convenient to have it at your home.
Superior Garden Superior Garden - Another important feature for transportation is to have it inside your home. When you reach level 75, construction with Farming players, you can place Spirit Tree in house. Additionally at 85 Construction Fairy Ring can be constructed. If you would like to have both in the same location, 95 Construction and 83 Farming will be mandatory.
Cape Hanger Cape Hanger item isn't very useful, in fact it can be quite useful. The use of skill caps that OSRS Fire Cape provide the ability to teleport (like Crafting one) on Cape Hanger will give you additional teleports just only a single click.