Garrison Achievements: Yes, These are Required

In what many can only call an odd move, blizzard has done something they have never done before in a sense by requiring an achievement to open up things.  It is not really the first time for this but it is the first time it is explicitly stated.  Many times we needed an achievement before we could do something like when we needed to clear a raid on normal before we could clear it on heroic.  But the normal achievement never said "unlocks heroic" so it never felt like it was required even if it was.

In warlords the achievements specifically say they reward you with the level three blueprints which effectively makes them required.  It seems worse than it is however as all the achievements are things you probably would accomplish anyway during the daily operations of your garrison to begin with.  And do not worry about these achievements being required for anything additional.  If you are not going to be taking advantage of garrisons, not getting these achievements will not hurt you in any way.

The awards in italics are the ones that offer blueprints.

Garrison Achievements:

Garrison Buddies (A) / Garrison Buddies (H):  Visit a friends garrison.
Staying Regular: Relieve yourself in the garrison outhouse.
More Plots (A) / More Plots (H): Upgrade your garrison to tier 2.
Even More Plots (A) / Even More Plots (H): Upgrade your garrison to tier 3.

Buildings:

Builder: Upgrade all the building plots on your garrison to level 2.
Master Builder: Upgrade all the building plots on your garrison to level 3.
Time for an Upgrade: Upgrade any garrison building to level 2.
Movin' On Up: Upgrade any garrison building to level 3.
Keepin' Busy:  Construct all the preset buildings listed.
Draftsman: Learn 20 garrison blueprints.
Master Draftsman: Learn 40 garrison blueprints.
Garrison Architect: Complete the listed achievements.  Awards: Architect title.
Working Some Orders: Complete 125 work orders at your garrison.
Working More Orders: Complete 250 work orders at your garrison.  Awards: Unlocks all level 3 profession building blueprints.
Working Many Orders: Complete 750 work orders at your garrison.

Barracks:

Wingman: Become a personal wingman with one of your barracks bodyguards.
Wingmen: Become a personal wingman with all (5) of your barracks bodyguards.

Barn:

The Trap Game: Place 50 work order by capturing creatures in the world.
Master Trapper: Place 125 work orders by capturing creatures in the world. Awards: Unlocks level 3 blueprint.
Trapper's Delight: Place 250 work orders by capturing creatures out in the world.
Trap Superstar: Place 500 work orders by capturing creatures out in the world.

Gladiator's Sanctum:

Fight, Kill, Salute!: Complete the quest Fight, Kill, Salute at Highmaul Coliseum.
Nemesis: Death Stalker (A): Complete this nemesis quest line. Awards: the Death Stalker title.
Nemesis:  Draenei Destroyer (H):Complete this nemesis quest line. Awards: Draenei Destroyer title.
Nemesis: Dwarfstalker (H):Complete this nemesis quest line. Awards: the Dwarfstalker title.
Nemesis: Gnomebane (H):Complete this nemesis quest line. Awards: Gnomebane title.
Nemesis: Huojin's Fall (A):Complete this nemesis quest line. Awards: Huojin's Fall title.
Nemesis: Killer of Kezan (A):Complete this nemesis quest line. Awards: Killer of Kezan title.
Nemesis: Manslayer (H):Complete this nemesis quest line. Awards: the Manslayer title.
Nemesis: Orcslayer (A):Complete this nemesis quest line. Awards: Orcslayer title.
Nemesis: Scourge of the Kaldorei (H):Complete this nemesis quest line. Awards: Scourge of the Kaldorei title.
Nemesis: Slayer of Sin'dorei (A):Complete this nemesis quest line. Awards: Slayer of Sin'dorei title.
Nemesis: Terror of Tushui (H):Complete this nemesis quest line. Awards: Terror of Tushui title.
Nemesis: The Butcher (A):Complete this nemesis quest line. Awards: the Butcher title.
Nemesis: Troll Hunter (A):Complete this nemesis quest line. Awards: Troll Hunter title.
Nemesis: Worgen Hunter (H):Complete this nemesis quest line. Awards: Worgen Hunter title.
Warlord of Draenor (A) / Warlord or Draenor (H):  Complete all nemesis and the fight kill salute quests.  Awards: Warlord of Draenor title.
The Bone Collector: Collect 5000 broken bones on draenor. Awards: Unlocks level 3 blueprint.

Gnomish Gearworks / Goblin Workshop:

Terrific Technology: Use all the inventions available at the workshop. Awards: Unlocks level 3 blueprint.

Lumber Mill:

Choppin' Some Logs: Place 10 work orders at the lumber mill.
Choppin' Some More Logs: Place 50 work orders at the lumber mill. Awards: Lumberjack title.
Upgrading the Mill: Place 75 work orders at the lumber mill and complete the quest lines.  Awards: Unlocks level 4 blueprint.
Choppin' Even More Logs (A): Place 100 work orders at the lumber mill. Awards: the Commandojack title.
Choppin' Even More Logs (H): Place 100 work orders at the lumber mill. Awards: Timber Lord title.

Lunarfall Inn / Frostwall Tavern:

Stay Awhile and Listen: Complete all the Inn quests listed. Awards: Unlocks level 3 blueprint.

Mage Tower / Spirit Lodge:

Finding Your Waystones: Loot 500 Orge Waystones. Awards: Unlocks level 3 blueprint.

Salvage Yard:

Salvaging Pays Off: Open 100 pieces of salvage from missons.  Awards: Unlocks level 3 blueprint.

Stables:

Intro to Husbandry:  Complete all the capture quests at the stables.
Master of Mounts: Fully train 6 mounts at your stables. Awards: Unlocks level 3 blueprint.
Advanced Husbandry (A) / Advanced Husbandry (H): Defeat all mount-in-training targets in nagrand while carrying the Black Claw of Sethe. Awards: Armored Frostboar.
The Stable Master (A) / The Stable Master (H): Defeat all mount-in-training targets in nagrand while carrying the Garn Tooth Necklace.  Awards: Armored Frostwolf and The Stable Master title.

Followers:

A Rare Friend: Recruit a rare follower.
An Epic Buddy: Recruit an epic follower.

Follow the Leader: Recruit 5 followers.
Where You Go, They Will Follow: Recruit 10 followers.
Fearless Leader: Recruit 25 followers.
Commander: Recruit 40 followers.

Following Up: Raise a follower to level 100.
Raising the Bar: Raise 10 followers to level 100.
Filling the Ranks: Raise 20 followers to level 100.  Awards: Unlocks level 3 dwarven bunker / war mill blueprint.

My Item Level Is Higher Than Yours: Raise a followers item level to 625.
My Item Level is Way Higher Than Yours: Raise a followers item level to 650.
Item Level Army:  Raise 10 followers' item level to 650.
Item Level Force: Raise 20 followers' item level 650.

Invasions:

Bronze Defender: Successfully complete a garrison invasion with a bronze rating or better.
Silver Defender: Successfully complete a garrison invasion with a silver rating or better.
Golden Defender: Successfully complete a garrison invasion with a gold rating.

Master Defender: Earn a gold in each max level invasion.
Save Those Buildings: Complete the invasions listed below without letting any buildings get destroyed.

It's an Invasion!: Successfully complete a garrison invasion.
Invasion Specialist: Successfully complete 10 garrison invasions.
Invasion?  What Invasion?: Successfully complete 50 garrison invasions.

Invasions Are Better With Friends: Successfully complete a garrison invasion in a party of 3.

Botani Invasion: Successfully complete a Botani garrison invasion.
Goren Invasion: Successfully complete a Goren garrison invasion.
Iron Horde Invasion: Successfully complete an Iron Horde invasion.
Orge Invasion: Successfully complete an Ogre invasion.
Shadow Council Invasion: Successfully complete a Shadow Council invasion.
Shadowmoon Clan Invasion: Successfully complete a Shadowmoon Clan invasion.

Missions:

On a Mission: Complete 10 missions.
On a Few Missions: Complete 50 missions.
On a Lot of Missions: Complete 100 missions.
On a Massive Number of Missions: Complete 500 missions.
On a Metric Ton of Missions: Complete 1000 missions.

A Rare Mission: Complete a rare mission.
Keeping It Rare: Complete 50 rare missions.
The Rarer the Better: Complete 300 rare missions.

Patrol Mission Specialist: Complete a patrol mission.
Patrolling Draenor: Complete 50 patrol missions: Awards: Unlocks level 3 barracks blueprint.

Treasure Mission Specialist: Complete a treasure mission.
Treasure Master: Complete 50 treasure missions.

Exploration Mission Specialist: Complete an exploration mission.

Mission Specialist:  Complete the mission specialists achievements listed below.

Monuments:
All award a garrison monument.

Defender of Draenor (A): Get 5000 honorable kills on draenor.
Defender of Draenor (H): Get 5000 honorable kills on draenor.
Draenor Pet Brawler: Win 2000 pet battles on draenor.
Master Draenor Crafter: Craft 50 epic items of at least 600.
Master of Apexis: Collect 100,000 apexis crystals.
Mythic Draenor Raider (A): Complete the mythic raiding achievements listed below.
Mythic Draenor Raider (H): Complete the mythic raiding achievements listed below.

Other Achievements:
These are achievements not listed under the garrison sub header but are required for the level 3 blueprints for garrisons and as such I consider them garrison achievements.

Draenic Pet Battler: Win 500 pet battles on draenor. Awards: Unlocks level 3 pet menagerie blueprint.
Draenic Seed Collector: Loot 500 draenic seeds. Awards: Unlocks level 3 herb garden blueprint.
Draenic Stone Collector: Loot 500 draenic stones.  Awards: Unlocks level 3 blueprint for lunarfall excavation / frostwall mines.
Draenor Angler: Complete the angler achievements listed below. Awards: Unlocks level 3 fishing shack blueprint.
Got My Mind On My Draenor Money: Loot 10,000 gold in draenor. Awards: Unlocks level 3 storehouse blueprint.
Savage Friends (A) / Savage Friends (H): Earn exalted with 3 draenor factions. Awards: Unlocks level 3 trading post.

Good luck with your achievement hunting.