Capacity and area

Seat count sets area, volume and exits. But cost does not scale linearly; some items are almost fixed however small the hall.

Level of stage equipment

The gap is large between a stage with fixed bars and basic lighting and one with motorised flying and advanced lighting. Set the level from real use.

Sound isolation

A hall next to a motorway, an airport or plant rooms needs far more isolation than one inside a quiet building.

Building condition

Conversion inside an existing building may need structural or HVAC changes; new build allows the optimal design from the start.

Finishes and seating

Natural timber, premium fabrics and VIP seats raise cost; luxury can be concentrated where it is most visible.

Getting a realistic estimate

Provide a clear brief and drawings, and ask for an itemised price, not just a lump sum.

Key takeaways

No honest generic figure exists.
Equipment level and isolation are the biggest variables.
Ask for itemised pricing.

This article is for general education; final design decisions are based on each project’s study and the competent authorities’ requirements.