ROI Calculator
Run your numbers.
Adjust the sliders to match your lot, finishing level, and local rents. The math updates live.
Your inputs
Your projected outcome
That's $633 dropping into your account every month after mortgage, vacancy, and upkeep.
Net rental income over 30 years + equity created at completion. Excludes appreciation and rent inflation — both typically work in your favor.
The math, line by line.
No mystery, no marketing. Here's exactly how we get from your inputs to your monthly net.
- 1
Hard construction
600 sq ft × $425 = $255,000
- 2
Soft costs (~12%)
Permits, plans, utility hookups, project management → $30,600
- 3
All-in cost
$285,600 total to deliver a finished, rentable unit.
- 4
Financing
20% down ($57,120) and the rest on a 30-yr loan at 7.00% → $1,520/mo
- 5
Realistic rent
$2,600/mo × 12 = $31,200/yr gross, less 8% vacancy and 10% maintenance → $25,834/yr effective.
- 6
Annual net cash flow
$25,834 − $18,241 mortgage = $7,593/yr in your pocket.
- 7
Break-even on your cash
$57,120 ÷ $7,593 = 7.5 years