Self Storage Monthly Cost Calculator
Estimate monthly self-storage cost from unit size, location tier, and duration.
Compares prices from 5x5 to 10x30 units with urban and suburban rate ranges.
Self-storage units are rented by the month and priced based on unit size, location, climate control, and access type. Accurately estimating your needs prevents paying for excess space or being forced to upgrade mid-rental.
Monthly cost formula: Monthly Cost = Unit Size (sq ft) × Price per Square Foot
Annual cost: Annual Cost = Monthly Cost × 12 + Move-in Fees + Insurance
Unit size guide:
| Unit Size | Space Equivalent | Best For |
|---|---|---|
| 5×5 (25 sq ft) | Large closet | Boxes, small furniture |
| 5×10 (50 sq ft) | Walk-in closet | Studio apartment contents |
| 10×10 (100 sq ft) | Half a one-car garage | 1-bedroom apartment |
| 10×15 (150 sq ft) | One-car garage | 2-bedroom apartment |
| 10×20 (200 sq ft) | Standard garage | 3-bedroom home |
| 10×30 (300 sq ft) | Large garage | Full house contents |
Average price per square foot (U.S. 2025):
- Non-climate-controlled: $0.70–$1.20/sq ft/month
- Climate-controlled: $1.10–$2.00/sq ft/month
Climate control premium: typically 25–50% more expensive but essential for wood furniture, electronics, documents, artwork, wine, and musical instruments.
Volume-based formula (cubic feet method): Cubic Feet Needed = Σ (Item Length × Width × Height) Divide by the unit ceiling height (typically 8 ft) to estimate required floor area.
Worked example: A 10×10 climate-controlled unit at $1.50/sq ft: Monthly = 100 × $1.50 = $150/month Annual = $150 × 12 + $25 admin fee + $120 insurance = $1,945/year
Cost-saving tips: Rent during off-peak months (January–February). Ask about first-month-free promotions. Sharing a 10×20 unit with a friend or neighbor is common and splits costs in half.