Second Story Addition in Boise, ID — Costs $79,133 to $494,583
What does second story addition cost in Boise? Average $197,833, ranging $79,133–$494,583. Labor runs $30.25/hr locally — 1% below the national average. Free breakdown with material + labor split.
Boise, ID Market
-1% vs nationalLabor Rate
$30.25/hr
Material Index
97
Avg Permit Cost
$1,852
Median Home Price
$347,811
Boise is a mid-sized city in Idaho with a healthy pool of local contractors. Homeowners generally have several options to compare for a second story addition, which helps keep pricing competitive. Boise offers slightly below-average renovation costs, giving homeowners a small cost advantage compared to most US markets. The median home in Boise is valued at $347,811, putting this project at about 56.9% of home value — a moderate investment with a projected 60% ROI.
Low Estimate
$79,133
National: $80,000
Mid-Range
$197,833
National: $200,000
High End
$494,583
National: $500,000
Per Sq Ft
$297
National: $300
Second Story Addition Cost Calculator for Boise
Adjusted for Boise's labor rate ($30.25/hr) and material costs (index 97).
Mid-grade materials, good quality fixtures, standard options.
Estimated Total in Boise
$197,833
Based on 200 sq ft at mid quality, adjusted for Boise market rates.
Local Cost Breakdown
At Boise's average rate of $30.25/hr (1% above national avg)
Material cost index 97 (3% below national baseline of 100)
Second Story Addition vs. Home Value in Boise
| Metric | Boise | National Avg |
|---|---|---|
| Second Story Addition (Mid-Range) | $197,833 | $200,000 |
| Median Home Price | $347,811 | $350,000 |
| Project as % of Home Value | 56.9% | 57.1% |
| Estimated ROI | 60% | 60% |
| Median Household Income | $80,749 | $75,000 |
What Affects the Price in Boise
- 1Local labor rates ($30.25/hr in Boise)
- 2Material cost index (97 vs national 100)
- 3Total square footage added
- 4Structural reinforcement of first floor
- 5Staircase addition
- 6Roof removal and replacement
Popular Upgrades
- Master suite
- Additional bedrooms
- Jack-and-Jill bathroom
Other Projects in Boise, ID
Accessory Dwelling Unit (ADU) Construction
$148,375
Room Addition
$89,025
Swimming Pool Installation
$64,047
Garage Addition
$54,404
Home Addition
$78,980
Inground Swimming Pool
$63,922
Attic Conversion
$54,510
Swimming Pool Construction
$49,554
Second Story Addition in Other Idaho Cities
Planning a Second Story Addition in Boise
Building permits are typically required for a second story addition in Boise. The average permit fee in this area is $1,852, though costs vary based on project scope. Permit fees in this market are above average — factor them into your total budget. Plan for 4-8 months from start to finish.
A second story addition is a complex project best left to licensed professionals. In Boise, skilled contractors charge an average of $30.25/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.
With a median household income of $80,749, many Boise residents can budget for this project through savings. The mid-range cost of $197,833 represents 245% of the typical household's annual income.
Second Story Addition — National Guide
See the full national cost guide with DIY tips, cost factors, and ROI analysis.
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View labor rates, material costs, and project estimates for Boise, ID.
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