City Upgrades

Overview

City upgrades are special buildings found in the Extensions tab of any house info window. The bonus received will apply to all the houses standing in the catchment area of each such extension regardless of which house's Extensions tab the building was chosen from. Warning: There is distance limit on building ANY of the city extensions. You may build it no more than 4 squares from the the closest city building. In other words, you can have 4 empty squares and the building must be placed on 5th square from the closest building. Buildings bigger than 1x1 have ONE square of their footprint assigned as the "Main" one. That square is the one which must be at the 5th square from the town, you might have to rotate the building to be able to place it on desired location. Different extensions get unlocked as you progress through the eras of the game. There are three main types of town upgrades: Public Services, Relax and Luxury, and two special: Constructions and Pollution Zone

Era	Public Services	Relax	Luxury
Early Steam	Well
	Market
	Saloon
Steam	Elementary School
Early Diesel	Fire Station	Park
		Tennis Court
Diesel	Police	Gallery
Early Electric			Car Dealer
			Private TV Station
Electric	Hospital	Football Stadium
	Hobby Market

How it works

It is important to use overlay when placing the city extensions. It should turn on as default when you try to place an extension, but if it doesn't, press the overlay icon in the upper right corner of your screen . Then select the first icon from the right - The City Upgrades Overlay

The catchment zones will be green around public services buildings, blue around relaxation buildings and purple around luxury buildings.

Warning: luxury buildings will have catchment zones only when activated - you must bring electricity  to the town. 

Each residential building has 4 levels. The number of game ticks for generating the passenger is individual for each building but each building generates:

Level 1 - One passenger in that given time interval

Level 2 - Two passengers (in the same time interval) if the house is build in either green zone

or blue zone

Level 3 - Three passengers if the house stands in the area covered by both blue and green zones

Level 4 - Four passengers if the house stands on the square covered by all three zones and is electrified

Public Services

Image	Details	Available from Era	Building Tile Size
		1	1x1
		1	1x1
		1	1x2
		3	1x2
		2	2x2
		4	2x2
		6	2x3
		6	2x2

Relax

Image	Details	Available from Era	Building Tile Size
		3	1x2
		3	1x2
		4	2x2
		6	2x3

Luxury

Image	Details	Available from Era	Building Tile Size
		5	1x2
		5	2x3

Construction

You can build a Construction zone at the location where you would like the next house to spawn. Or you can built "Construction prohibited" area, which is a little park without any bonuses, it just prevents the city to spawn next house in that square.

Image	Details	Available from Era	Building Tile Size
		1	1x1
		1	1x1

Pollution Zone

Each and every industrial building (with the exception of Forest) have a pollution zone around itself. The size is different for each building and you can see it in the info window.

You can see it in the city overlay as rusty brown zone around industrial buildings. Train platforms also have 1 square pollution zone around themselves. The station buildings and decorations do not have pollution zone, neither do the road stations. It is advisable to block the pollution zone at the train station by placing station upgrades and/or decorations around the platforms.

The Pollution zone prevents houses from being upgraded. The effect of the pollution zone is permanent and cannot be canceled by building other city upgrades nearby. You can either have small level 1 houses around industrial buildings as "workers quarters" or you have to place the Construction prohibited extension, or other some other extensions, just to block the area.