The cost to build a basketball gymnasium varies widely depending on location, design, size, materials, and whether it is intended for school use, community recreation, or professional-level competition. To give a clearer picture, here’s a detailed breakdown of the main factors and cost ranges:

1. Size and Court Layout

• High School / Community Gymnasium

• Typically includes one 84 × 50 ft full court, seating for a few hundred spectators, basic locker rooms, and storage.

• Estimated cost: $2 million – $6 million depending on finishes and location.

• College / Multi-Purpose Gymnasium

• Often includes a 94 × 50 ft full court, multiple cross courts for training, upgraded lighting, larger locker rooms, weight rooms, and moderate spectator seating.

• Estimated cost: $6 million – $15 million.

• Professional or Arena-Level Facility

• Full NBA-standard court with premium hardwood flooring, advanced HVAC, acoustics, video scoreboards, training facilities, press areas, and large-capacity seating.

• Estimated cost: $15 million – $60 million+, depending on seating capacity and design complexity.

2. Key Cost Components

a. Land and Site Preparation

• Grading, excavation, drainage, and utility connections.

• Range: $200,000 – $1 million depending on site condition.

b. Structural Construction

• Steel or concrete frame, roofing, insulation, and walls.

• A basic steel-frame gym can cost $150 – $300 per sq. ft.

c. Flooring

• Hardwood Sports Flooring (Maple or Birch) is the industry standard.

• Installed cost: $70,000 – $140,000 for a full-size court.

• Portable systems cost more upfront but offer flexibility.

d. Seating

• Retractable bleachers for schools/community gyms: $100,000 – $300,000.

• Arena seating with luxury boxes: several million.

e. Lighting & Sound

• LED sports lighting for uniform visibility: $50,000 – $150,000.

• Professional sound system and acoustics: $100,000 – $500,000.

f. HVAC and Ventilation

• Critical for athlete performance and wood floor protection.

• Cost: $500,000 – $2 million, depending on system size.

g. Locker Rooms, Offices, and Amenities

• Basic school locker rooms: $200,000 – $500,000.

• College/pro-level with showers, training rooms, gyms: $1 million – $5 million.

h. Additional Features

• Scoreboards: $20,000 – $250,000 (depending on digital complexity).

• Concession areas, restrooms, security systems: $250,000 – $1 million.

3. Maintenance and Lifecycle Costs

• Annual maintenance: $50,000 – $200,000 (floor recoating, cleaning, HVAC service).

• Floor refinishing every 7–10 years: $20,000 – $40,000.

• Upgrades (lighting, technology) expected every 10–15 years.

4. Summary of Total Cost Ranges

A basketball gymnasium is not just about the playing court—it integrates architecture, engineering, athlete safety, and fan experience. Costs scale significantly with the level of play expected, from a modest high school gym to a professional-grade sports arena.