Singapore Changi Airport (SIN) Parking

Parking Options at Changi Airport include six carparks close to the passenger terminals:
T1 has an open-air Carpark 1;
T2 has two multi-storey carparks 2A & 2B linked to the terminal with sheltered access;
Terminal 3 has at its basement level two carparks 3A & 3B. 
The Budget Terminal has an open-air carpark. 

Carparks are accessible from T2 Departure Check-in Hall Level 2 on either side; or from T3, B2 Mall, and Basement 2 on either side.
All carparks offer the first 10 minutes of parking free - ideal for pickup/dropoff. 
You are not bound to park in any specific carpark and can park in any one of them.

As an alternative to on-site parking, there are off-airport parking at Singapore Changi airport options which may offer significant discounts. Most have shuttle vans or buses which operate from their facilities to the terminals, and feature secure facilities with security guards and cameras 24 hours.

Many local hotels offer up to 2 weeks free parking with one night stay. This can be especially convenient if you have an early flight and need to park at Singapore Changi airport. They provide shuttle service too.

Nothing is more frustrating than circling an airport parking lot looking for space when you're already running late for a flight or paying an exorbitant amount for parking when you return from a trip. You can avoid these common predicaments by doing your homework before leaving to park your vehicle at the airport.

Most airports offer multiple parking lots at various rates (hourly, daily and economy). Some airports even offer costly, but convenient valet parking. Visit the airport website or call the airport to determine the location and rates for each type of parking garage or service. During peak travel times, it's also prudent to check the short-term and long-term parking lot availability before leaving for the airport, so you can make other arrangements if lots are full. Parking in a daily garage (short-term parking) instead of an economy (long-term parking) lot for multiple days will burn a big hole in your wallet.

You’ll find commercial off-site parking lots near most major airports. These parking lots are farther from the airport, but the distance is often compensated with lower prices, 24-hour security, car-to-terminal shuttle services and other perks like frequent parker programs. Aside from off-site commercial parking lots allow you to reserve a parking spot in advance, which can be a real timesaver during peak travel times. In addition, many airport hotels offer stay, park and fly deals in which you stay at the hotel the night before your flight and then you can park your car at the hotel for free or a low daily rate. Just make sure the hotel parking lot is secure as some aren’t monitored around-the-clock like airport and commercial lots.

It’s too easy to forget where you parked or where you put the parking ticket after an extended trip. Even if you’re running late, take the time to note where you parked in your cell phone, PDA or on the parking ticket if you take it with you. Just make sure you don’t lose the parking ticket, because most airports charge a hefty fee for missing tickets. For that reason, it may be safer to leave the ticket in your car.