How Much Does Room Addition Cost in Boise, ID?
Average room addition costs in Boise range from $8,608 to $11,646. Get a free, customized estimate below.
Room Addition Cost Breakdown — Boise, ID
| Item | Unit | Qty | Unit Price | Total |
|---|---|---|---|---|
| Foundation | sq ft | 200 | $14.25 | $2850.00 |
| Framing | sq ft | 200 | $11.40 | $2280.00 |
| Roofing | sq ft | 220 | $7.60 | $1672.00 |
| Electrical & Plumbing | lump sum | 1 | $3325.00 | $3325.00 |
| Estimated Total | $10,127.00 | |||
* Prices are estimates based on Boise market rates. Actual costs may vary based on project specifics.
Estimate
Ref ID: EST-2026-JRIS
Date Issued
May 6, 2026
Client
Project Details
Site Address
Start Date
End Date
Scope of Work
Materials
| Material Specification | Units | Amount | Ext. Total | |
|---|---|---|---|---|
$ | $2,850 | |||
$ | $2,280 | |||
$ | $1,672 | |||
$ | $3,325 |
Labor
| Service Specification | Type | Hrs | Rate | Ext. Total | |
|---|---|---|---|---|---|
Craftsmanship Guarantee | $ | $600 |
Contractual Agreements & Conditions
Total
$10,727
Draft
Frequently Asked Questions — Room Addition in Boise
How much does room addition cost in Boise, ID?
The average cost for room addition in Boise, ID ranges from $8,608 to $11,646, depending on project scope, materials, and labor rates. Boise costs are close to the national average.
How do I get a free room addition estimate in Boise?
Use Brixor's free online estimate generator above. Enter your project details, customize line items for your specific needs, and download a professional PDF estimate instantly. No signup or credit card required.
What factors affect room addition costs in Boise?
Key factors include project size and complexity, material quality, labor rates in Boise (ID), permit requirements, accessibility of the work area, and seasonal demand. Getting multiple estimates is recommended.