.Small Ambulance Stations are exactly the same as normal ambulance stations, except they can only expand to hold 6 vehicles. Also, you can only buy one extensions for Small ambulance Stations. You have the option of upgrading the Small Station into a normal station. This takes 24 hours and the cost of the original station's price. Small ambulance Stations start out as 100,000 credits, as soon as 25 fire stations are built, the price becomes 150,000 credits. After that the price continues to rise by small amounts.

Vehicles: Ambulance, RRV, Joint response unit, OTL, Crew carrier, Ambulance control Unit, CBRN Unit

Can be upgraded  to Ambulance station for 100,000 credits. (When upgrading, you do not lose any bays, it allows you to continue expanding bays and adding extensions)