Interior remodel static cost scenario
Home Addition Cost for 300 sq ft
The modeled typical cost is $74,037, with a planning range of $51,826 to $119,199 for 300 sq ft.
Computed cost breakdown
| Line item | Arithmetic basis | Amount |
|---|---|---|
| Materials | 300 sq ft × indexed material rate | $38,676 |
| Labor | 300 sq ft × indexed labor rate × 1.00 | $29,461 |
| Permits | Baseline allowance | $3,800 |
| Disposal | 300 sq ft × disposal rate | $2,100 |
| Typical total | $74,037 | |
Low $51,826 · Typical $74,037 · High $119,199
Difference from the parent scenario
This quantity-specific total is 24.0% below the parent default of $97,449. The arithmetic changes quantity while retaining the parent model’s rates and national wage factor.
Open the interactive home addition cost to change quality, scope, contingency, or ZIP.
Primary cost controls
- Room or project size
- Finish and material tier
- Layout and structural changes
- Trade coordination and access
Questions about this scenario
What is the modeled typical cost for 300 sq ft?
The static default is $74,037, with a planning range of $51,826 to $119,199 from the shared calculator record.
What changes from the national calculator?
The modeled quantity changes to 300 sq ft. The same baseline rates, index changes, quality setting, and national labor factor are retained.
Is this a local contractor quote?
No. It is a static planning scenario generated from the public baseline store. Confirm site conditions, scope, code requirements, and price in written local proposals.