c est ici: http://www.mmo-champion.com/threads/1599068-Comprehensive-guide-to-building-up-your-Garrison
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3.1 Build Order for Leveling
This guide will suggest the best possible buildings for your Garrison during the Leveling phase.. It will include the first 2 levels of your Garrison. As you level up, some quest will award you with an item that can be exchanged for level 2 blueprints in Ashran, these items are Outpost Building Assembly Notes (small and medium buildings) and Comprehensive Outpost Construction Guide (large buildings). These are awarded at the end of one major quest line in each zone (excluding starting zones).
Garrison Level 1
Small: Build an Enchanter's Study. It will allow you to Disenchant all gear that you get from questing. (à noter que si vous avez un enchanteur dans votre groupe meme si il est enchant bas lvl et à hv vous aurez toujours la possibilité de dez)
Large: Build the Barracks. It will enable additional missions for your followers, providing you with more gold /GR and them with additional exp so they can keep up with you. You will build this building via the fist quests you get when you make a garrison, and you won't really have anything else to choose from at this point.
Garrison Level 2
Small: Your 2nd small building should be the Salvage Yard, that can be acquired at level 96. It will allow you to collect Salvage from missions. Do not open these till you upgrade the Salvage Yard to level 2 (that is when they can drop useful loot)! If you are a slow leveler and getting to 96 would take you more then a day, build a profession building till then (make sure to have the said profession).
Medium: Make a Lumber Mill. It allows you to collect Timber from trees that you come across as you level up. Timber can be converted to GR via work orders at the Lumber Mill.
3.2 Build Order for Raiding
This guide will suggest the best possible buildings for your Garrison, specifically intended toward a Raider. This guide is for a level 3 garrison, attained once level 100 is reached. For any lower level garrison, please refer to the Build Order for Leveling guide above.
Salvage Yard. Allows you to gear up you followers so they can run dungeon and raid missions which can award you with gear. Raid missions specifically award you with items that are from a raid difficulty higher then the one you are running (one difficulty above current, if you're raiding Mythic you will also get 1000 gold).
2 Profession Buildings. Choose the ones that match your professions.
Trading Post. Allows you to trade GR for any materials, so you can make consumables. It also allows you to trade random materials each day for GR via work orders.
Lumber Mill. Keeps you well supplied with GR. Do note that Barn is better if you have already unlocked the lvl 3 blueprints.
The Barracks. Increases follower limit to 25, allowing more missions at once.
Bunker. Can help gear up followers via work orders. Provides you with a free Seal of Tempered Fate each week (bonus roll).