Room Addition in Boise, ID — Costs $34,621 to $197,833
What does room addition cost in Boise? Average $89,025, ranging $34,621–$197,833. 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 room 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 25.6% of home value — a moderate investment with a projected 55% ROI.
Low Estimate
$34,621
National: $35,000
Mid-Range
$89,025
National: $90,000
High End
$197,833
National: $200,000
Per Sq Ft
$198
National: $200
Room 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
$89,025
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)
Room Addition vs. Home Value in Boise
| Metric | Boise | National Avg |
|---|---|---|
| Room Addition (Mid-Range) | $89,025 | $90,000 |
| Median Home Price | $347,811 | $350,000 |
| Project as % of Home Value | 25.6% | 25.7% |
| Estimated ROI | 55% | 55% |
| 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)
- 3Square footage
- 4Foundation type
- 5Number of stories
- 6Roof integration
Popular Upgrades
- Cathedral ceiling
- En-suite bathroom
- Walk-in closet
Other Projects in Boise, ID
Second Story Addition
$197,833
Accessory Dwelling Unit (ADU) Construction
$148,375
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
Room Addition in Other Idaho Cities
Planning a Room Addition in Boise
Building permits are typically required for a room 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 3-6 months from start to finish.
A room 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 $89,025 represents 110% of the typical household's annual income.
Room Addition — National Guide
See the full national cost guide with DIY tips, cost factors, and ROI analysis.
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