How Much Does Room Addition Cost in Honolulu, HI?
Average room addition costs in Honolulu range from $14,045 to $19,001. Get a free, customized estimate below.
Room Addition Cost Breakdown — Honolulu, HI
| Item | Unit | Qty | Unit Price | Total |
|---|---|---|---|---|
| Foundation | sq ft | 200 | $23.25 | $4650.00 |
| Framing | sq ft | 200 | $18.60 | $3720.00 |
| Roofing | sq ft | 220 | $12.40 | $2728.00 |
| Electrical & Plumbing | lump sum | 1 | $5425.00 | $5425.00 |
| Estimated Total | $16,523.00 | |||
* Prices are estimates based on Honolulu market rates. Actual costs may vary based on project specifics.
Estimate
Ref ID: EST-2026-30BL
Date Issued
May 6, 2026
Client
Project Details
Site Address
Start Date
End Date
Scope of Work
Materials
| Material Specification | Units | Amount | Ext. Total | |
|---|---|---|---|---|
$ | $4,650 | |||
$ | $3,720 | |||
$ | $2,728 | |||
$ | $5,425 |
Labor
| Service Specification | Type | Hrs | Rate | Ext. Total | |
|---|---|---|---|---|---|
Craftsmanship Guarantee | $ | $600 |
Contractual Agreements & Conditions
Total
$17,123
Draft
Frequently Asked Questions — Room Addition in Honolulu
How much does room addition cost in Honolulu, HI?
The average cost for room addition in Honolulu, HI ranges from $14,045 to $19,001, depending on project scope, materials, and labor rates. Honolulu 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 Honolulu?
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 Honolulu?
Key factors include project size and complexity, material quality, labor rates in Honolulu (HI), permit requirements, accessibility of the work area, and seasonal demand. Getting multiple estimates is recommended.