Garages in ETS2 are far different than the ones in German or UK Truck Simulator. For one thing, there are three sizes: tiny [1 one truck, 0 hired drivers], small [1 truck, 2 hired drivers], and large [1 truck and 5 hired drivers and a gas station].
All garages have the same model in the original map and in the Going East!, but in Scandinavia, they are different.
Tiny garage has no gas station, 1 garage parking spot, and grass around it. Price: 0 Euros [Pounds, dollars, etc]
Small garage has no gas station, 3 garage parking spots, and road around it with some grass and parked cars. Price: 100,000 Euros, 80,000 pounds, or 130,000 USD.
Large garage has 1 gas station, 6 garage parking spots, and road around it with cars. Price: 180,000 Euros, 144,000 Pounds, or 230,000 USD.
Where to Find Garages
Garages are found almost everywhere in cities that have a garage icon.
What you need to buy or sell a garage
To Buy a Garage:
1 - Have the required money on you so you can purchase the garage.
2 - Buy the garage.
3 - Hire drivers and buy trucks [if necessary] to fill the remaining slots.
To Sell A Garage:
1 - Go to the Company Manager at the bottom of the screen.
2 - Go to garage manager.
3 - Go to the garage that you want to sell and hit the sell button to get some money back [except the garage that you have selected as your headquarters].
4 - Hire drivers and extra trucks should disappear if not, a message may say to get rid of them before getting rid of the desired garage you want to sell.