🌞
Free Sunroom Addition Estimate Template (Excel, 2026 Build Costs)
Typical project: · Timeline: weeks
📊 Trade Benchmarks (avg)
Cost per Sq Ft
$150 - $350
Varies by glass quality
ROI at Sale
45-55%
Value-add secondary space
Timeline
4 - 8 weeks
Standard build cycle
📦 Materials Cost Breakdown
Direct Material| Line Item | Cost | Notes |
|---|---|---|
| Glazing / Window System | $12,500 | High-E tempered glass |
| Lumber & Sheathing | $4,200 | Framing + Roof tie-in |
| Mini-Split HVAC | $2,800 | Mitsubishi 12k BTU unit |
| Materials Subtotal | $19,500 |
👷 Labor Cost Breakdown
Direct Labor| Task | Cost | Notes |
|---|---|---|
| Slab & Framing | $8,500 | Structural shell |
| Roofing & Siding | $4,200 | Matching existing home |
| Electrical & HVAC Set | $3,200 | Dedicated circuits + trim |
| Labor Subtotal | $15,900 |
⚠️
Markup ≠ Margin — Don't Make This Mistake
A % markup on $35,400 gives % gross margin — not %. To hit a true % gross margin, divide your cost by NaN.
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