Gym Buildout Cost Per Square Foot: Where Gym Budgets Blow Up

Last updated Oct 20, 2026

In short

Gym buildout costs about $10 to $30/sq ft in second-generation gym space, $40 to $90/sq ft in second-generation retail or office, and $90 to $150 or more per sq ft in a raw shell. The Southeast is the lowest-cost region in the U.S. for retail fit-outs. Budgets blow up on HVAC, electrical, plumbing and permit delays far more often than on finishes.

• $117/sq ft [1]: Southeast in-line retail fit-out average, 2025.
• $157/sq ft [2]: U.S. retail fit-out average, 2026.
• $15 to $35/sq ft [3]: commercial HVAC upgrade budget for a gym.
• 4.54% [4]: year-over-year construction cost growth in Nashville, Q2 2025.

Second-generation space vs. a raw shell

• Second-generation gym space: existing rubber floors, mirrors, restrooms and HVAC sized for workouts, so the work is mostly cosmetic. Vagaro estimates a former fitness space can save $30,000 or more.
• Second-generation retail or office: restrooms and HVAC exist but are rarely sized for a gym. Expect demo, flooring, electrical and HVAC upgrades. ABC Fitness puts basic interior buildout at around $40/sq ft. Installed 3/8-inch rubber flooring adds $2.50 to $4.00/sq ft.
• Raw or cold dark shell: you build everything. The Workout Mag estimates a cold dark shell adds $40 to $80/sq ft in upfront buildout, even though base rent is lower.

For benchmarking, Cushman & Wakefield's 2025 guide puts the Southeast fit-out average at $117/sq ft against $155 nationally, and its 2026 guide puts the national figure at $157.

Where budgets blow up

1. HVAC. Gyms produce far more heat and humidity than retail. The Workout Mag budgets $15 to $35/sq ft for commercial HVAC upgrades.
2. Electrical. Treadmills, saunas and cold plunges need dedicated circuits. Commercial traditional sauna heaters typically need 208V three-phase power.
3. Plumbing. Adding restrooms or showers can mean cutting slab.
4. Code-driven items. The 2021 IBC classifies gymnasiums without spectator seating as Group A-3 assembly use, while small tenant spaces under 50 occupants can be classified as Group B under §303.1.1. The classification drives sprinklers, fire alarms, exits and restroom counts.
5. Permit timing. Every re-review cycle adds weeks of rent with no revenue. Metro Nashville allows 30 days for plan review and accepts third-party review for tenant finish-out. Local timelines are in the city guides for Nashville, Charlotte, Chattanooga and Asheville.

Are Southeast construction costs rising?

Yes, moderately. Rider Levett Bucknall's Q2 2025 East report lists year-over-year construction cost growth of 4.54% in Nashville.

How to keep buildout under budget

• Get an MEP (mechanical, electrical, plumbing) walk-through before you sign the lease.
• Negotiate a TI allowance and make the landlord responsible for delivering working HVAC.
• Design the floor plan around revenue per sq ft: training floor first, then amenities.
• Hold 10% to 15% contingency.
• Budget for stamped drawings. Buncombe County's commercial checklist requires plans sealed by a registered architect or licensed engineer, and most jurisdictions have similar rules.
• Price wet amenities separately. Our sauna and cold plunge guide covers their electrical and plumbing needs.

See also: how much it costs to open a gym, small gym startup costs and commercial gym equipment cost.

Frequently asked questions

What is the average buildout cost for a gym? It depends on space type. The Southeast retail fit-out average is $117/sq ft. Second-generation gym space can cost a fraction of that.

Does the landlord pay for gym buildout? Often in part, through a tenant improvement allowance. You negotiate it in the lease.

Is HVAC required for a gym? Yes. HVAC sized for workouts is one of the most common unbudgeted upgrades.

Sources

1. Fit Out Cost Guide 2025: Americas Retail. Cushman & Wakefield, 2025. Accessed Oct 20, 2026.
2. 2026 U.S. Retail Fit Out Cost Guide. Cushman & Wakefield, 2026. Accessed Oct 20, 2026.
3. How Much Is It to Start a Gym? 2026 Cost Benchmarks. The Workout Mag, 2026. Accessed Oct 20, 2026.
4. RLB Construction Cost Report: East Q2 2025. Rider Levett Bucknall, 2025. Accessed Oct 20, 2026.
5. Gym Startup Costs in 2026: What It Really Takes to Open Your Doors. Vagaro, 2026. Accessed Oct 20, 2026.
6. The Cost of Owning a Gym in 2026: Full Breakdown. ABC Fitness, 2026. Accessed Oct 20, 2026.
7. Saunas for Gyms, Spas & Wellness Centers: The Complete Commercial Buyer's Guide. Haven of Heat. Accessed Oct 20, 2026.
8. 2021 International Building Code, Section 303.4: Assembly Group A-3. International Code Council. Accessed Oct 20, 2026.
9. 2021 International Building Code, Chapter 3: Occupancy Classification and Use. International Code Council. Accessed Oct 20, 2026.
10. Commercial Permit FAQ (6/2026). Metro Nashville Codes and Building Safety, June 2026. Accessed Oct 20, 2026.
11. Commercial Checklist. Buncombe County Permits & Inspections. Accessed Oct 20, 2026.