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In most cases, no, you won’t need a permit to replace drywall. If you’re changing the floorplan of your home by adding or removing walls during the drywall project, then you might need a permit, but replacement or repairs usually doesn’t require a permit. Your drywall professional should be able to confirm whether or not a permit is required for your project. If it is, it’s likely to add between $50 and $150 to your total cost. Keep in mind that you will need permits if you plan to install new electrical wiring or plumbing lines behind your new drywall.

Drywall does not necessarily need to be glued to the ceiling, especially when it is properly screwed or nailed into place. Drywall is typically attached to the ceiling joists using screws or nails, ensuring a secure and stable drywall installation. 

However, in certain situations where additional adhesion is required, construction adhesive can be applied in combination with screws or nails. This is often done for ceilings with specific acoustic or insulation requirements. It's essential to follow local building codes and best practices to determine if adhesive use is necessary for your specific project.

Costs depend on material type, labor rates, and additional features like decorative finishes or reinforcement.

Drywall installation is considerably faster and more affordable than plastering. Because plastering involves applying a wet material, it’s more time-consuming, takes longer to dry, and is more prone to cracking. It doesn’t tend to be as insulative either. If you need resurfacing work done on the walls, it's not unusual for the cost of plastering to hit $10 per square foot, which is much higher than the drywall installation costs of $1.50 to $3 per square foot.

If you’re looking for good soundproofing and want a high-end look in a historic home, though, plastering may be the better option.