Tile improvement (Civ6)

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Tile improvements are modifications on tiles created by Builders to improve tile yields, gain resources, or provide infrastructure.

Basics

Although most improvements are constructed by Builders, there are some which are considered of particular importance for military purposes, and are thus entrusted to the Military Engineer. Constructing an improvement consumes one Builder or Engineer charge. Improvements may also be removed, which also consumes one charge.

In most cases, tile improvements may only be built within a civilization's territory or in a City-State when the player is the Suzerain. All of the Military Engineer's improvements save the Missile Silo are exceptions to this rule, and may also be constructed on Neutral terrain.

All tile improvements except Farms are unlocked by researching technologies. The Farm is considered the primordial Improvement learned when your tribe developed Agriculture and thus jumped the gap from the life of the hunter-gatherer to civilized life.

Tile improvements may only be constructed on certain types of terrain, or on resources. They may not be constructed on tiles that already contain a city district or wonder. Like districts, some improvements gain an adjacency bonus for being built next to certain types of terrain, other improvements, resources, or wonders.

Like districts, improvements may be pillaged by hostile forces such as Barbarians. A Builder will have to repair them before they can regain their functions; this action doesn't consume a charge.

Tile Improvements providing Housing

There are several tile improvements which are connected with Housing Housing, one of the new features in Civilization VI. They are the Farm, the Pasture, the Camp and Fishing Boats. All of them serve as alternatives to city Housing, and besides their yield boosts provide 0.5 Housing each to the city working them. Thus, a city controlling land suitable for building these improvements has an alternative source of Housing Housing - rural housing areas for the farmers, and is able to grow its Population faster.

List of Tile Improvements

Standard Improvements

Name	Technology/Civic	Terrain	Resource	Base Yield Modifier & Notes
Farm		Grasslands, Plains, or Resource. Can build Farms on Grassland Hills and Plains Hills with Civil Engineering.	Wheat Wheat Rice Rice	+1  Food Adds 0.5  Housing Housing +1 Food for each adjacent Farm when 3 Farms are adjacent to each other (Feudalism), +1 Food for each adjacent Farm improvement (Replaceable Parts).
Mine	Mining	Hills or Resource	Copper, Diamonds Diamonds, Iron, Mercury Mercury, Niter, Coal, Aluminum, Uranium	+1  Production +1 Production (Apprenticeship), +1 Production (Industrialization).
Quarry	Mining	Only on Resource	Stone Stone, Marble, Gypsum	+1  Production +1 Gold (Banking), +1 Production (Rocketry)
Plantation	Irrigation	Only on Resource	Bananas, Citrus Citrus, Cocoa, Coffee, Cotton, Dyes, Silk, Sugar, Tea, Tobacco, Wine	+1  Gold Adds 0.5 Housing Housing +1 Food Food (Scientific Theory), +1 Gold (Globalization).
Camp	Animal Husbandry	Only on Resource	Deer, Fur, Ivory, Truffles	+1  Gold Adds 0.5  Housing Housing +1 Production (Mercantilism), +1 Gold (Synthetic Materials)
Pasture	Animal Husbandry	Only on Resource	Sheep Sheep, Horses, Cattle Cattle	+1  Production Adds 0.5 Housing Housing +1 Food (Exploration), +1 Production (Robotics).
Fishing Boats	Sailing	Only on Resource	Fish, Crabs, Whales, Pearls	+1  Food Adds 0.5 Housing Housing +1 Gold (Cartography), +1 Food (Plastics)
Lumber Mill	Machinery	Only on Woods feature	Woods	+1  Production +1 Production if adjacent to River, +1 Production (Steel).
Fort	Siege Tactics			Occupying unit receives +4 Defense Strength and 2 turns of fortification. May also be built by a Military Engineer or a Roman Legion.
Airstrip	Flight	Flat Terrain		+3 Aircraft Capacity Built by Military Engineer.
Seaside Resort	Radio	Coastal Desert, Coastal Plains, Coastal Grassland	Minimum Appeal of "Breathtaking"	Provides double the tile's Appeal in Tourism. Double Tourism Output from Cristo Redentor. Also provides the tile's Appeal in Gold
Oil Well	Combustion	Only on Land Tiles with Oil resource	Oil	+2  Production
Missile Silo	Rocketry			+1 Missile Capacity Built by Military Engineer, Acts as launch site for Nuclear and Thermonuclear Devices
Offshore Oil Rig	Plastics	Only on Sea Tiles with Oil resource	Oil	+2  Production

Roads

Roads are a special type of improvement connecting cities and districts, and providing faster land travelling. Roads may not be built by Builders. Aside from Traders which build roads as they establish trade routes, only the Military Engineer and Legion unit can build roads. Every district and wonder automatically creates a road on its tile, which remains even if the feature is pillaged or the city is razed.

Roads themselves can be manually pillaged by a marauding combat unit.

In later eras, roads will upgrade with technology reducing movement cost. Roads within city borders will upgrade automatically; those outside must be repaved by Traders.

Name	Era	Notes
Ancient Roads	Ancient	No movement penalties for terrain
Classical Roads	Classical	Adds bridges over rivers
Industrial Roads	Industrial	0.75 movement speed cost
Modern Roads	Modern	0.50 movement speed cost

Unique Tile Improvements

These improvements are only available to certain civilizations, but do not replace a generic one. They are not used to connect resources.

Name	Civilization	Technology/Civic	Terrain	Base Yield Modifier & Notes
Alcazar	Granada	Suzerainty bonus	Any terrain	+2 Culture Occupying unit receives +4 Defense Strength and 2 turns of fortification.
Chateau	France		Must be next to river	+1 Culture (additional +1 if adjacent to a Wonder) +1 Gold if adjacent to a luxury resource
Colossal Heads	La Venta	Suzerainty bonus	Any terrain	+2 Faith
Great Wall	China	Masonry	Must be on city border	Defense boost +1 Culture, +1 Gold, and +1 Tourism
Kurgan	Scythia	Animal Husbandry	Cannot be built on hills	+1 Faith, +1 Gold +1 Faith and +1 Gold for each adjacent Pasture
Mission	Spain	Exploration		+1 Faith +1 Faith when built on foreign continent +1 Science if adjacent to a Campus
Monastery	Armagh	Suzerainty bonus	Any terrain	+2 Faith
Sphinx	Egypt	Crafsmanship	Any terrain	+1 Culture, +1 Faith +2 Faith for each adjacent Wonder
Stepwell	India	Irrigation		+1 Food, +1 Housing Housing +1 Food for each adjacent Farm +1 Faith if adjacent to a Holy Site
Ziggurat	Sumeria		Cannot be built on hills	+2 Science +1 Culture when next to river

National Parks

National Parks are not tile improvements per se. They can only be created by Naturalists by designating the tiles which are to form part of the National Park. The Naturalist is consumed after this action. For more info on them go here.