What can we do other than build new facilities?

Some churches have chosen a 3rd or 4th service on Saturday or Sunday evenings.
Another option might be to rent a large facility like a school gymnasium or a theater, just for Sunday morning services.
A satellite church may be an option if you have people coming from certain neighboring areas or towns.
Remodeling or renovating an existing building is also another option for the growing church.
An idea should be in place for the new building before you start raising funds.