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Math
One option the client is considering is converting a portion of their office space into residential apartments. They’ve asked us to run the numbers on a 250,000 sq ft building in Charlotte, NC. Here are the assumptions:
- Residential conversion cost: $200/sq ft
- Expected monthly rent per unit: $2,000
- Average unit size: 1,000 sq ft
- Annual operating expenses: 30% of gross rent
How many years would it take for the client to recover the conversion cost?
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Sample answer from an expert consultant
Step 1: Conversion Cost
- 250,000 sq ft × $200/sq ft = $50M
Step 2: Number of Units
- 250,000 sq ft ÷ 1,000 sq ft/unit = 250 units
Step 3: Annual Gross Rent
- $2,000/month × 250 units × 12 months = $6,000,000
Step 4: Net Income
- $6M × (1 – 30%) = $4.2M/year
Step 5: Payback Period
- $50M ÷ $4.2M ≈ 11.9 years
Answer: It would take approximately 12 years to recover the conversion cost.
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