How Much Does Room Addition Cost in Chicago, IL?
Average room addition costs in Chicago range from $10,873 to $14,711. Get a free, customized estimate below.
Room Addition Cost Breakdown — Chicago, IL
| Item | Unit | Qty | Unit Price | Total |
|---|---|---|---|---|
| Foundation | sq ft | 200 | $18.00 | $3600.00 |
| Framing | sq ft | 200 | $14.40 | $2880.00 |
| Roofing | sq ft | 220 | $9.60 | $2112.00 |
| Electrical & Plumbing | lump sum | 1 | $4200.00 | $4200.00 |
| Estimated Total | $12,792.00 | |||
* Prices are estimates based on Chicago market rates. Actual costs may vary based on project specifics.
Estimate
Ref ID: EST-2026-6V83
Date Issued
May 6, 2026
Client
Project Details
Site Address
Start Date
End Date
Scope of Work
Materials
| Material Specification | Units | Amount | Ext. Total | |
|---|---|---|---|---|
$ | $3,600 | |||
$ | $2,880 | |||
$ | $2,112 | |||
$ | $4,200 |
Labor
| Service Specification | Type | Hrs | Rate | Ext. Total | |
|---|---|---|---|---|---|
Craftsmanship Guarantee | $ | $600 |
Contractual Agreements & Conditions
Total
$13,392
Draft
Frequently Asked Questions — Room Addition in Chicago
How much does room addition cost in Chicago, IL?
The average cost for room addition in Chicago, IL ranges from $10,873 to $14,711, depending on project scope, materials, and labor rates. Chicago costs are above the national average due to higher labor and material costs in the region.
How do I get a free room addition estimate in Chicago?
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 Chicago?
Key factors include project size and complexity, material quality, labor rates in Chicago (IL), permit requirements, accessibility of the work area, and seasonal demand. Getting multiple estimates is recommended.