San Diego, CA · Updated 2026

How Much Does Room Addition Cost in San Diego, CA?

Average room addition costs in San Diego range from $11,779 to $15,937. Get a free, customized estimate below.

30% above national averageFree · No Signup Required

Room Addition Cost Breakdown — San Diego, CA

ItemUnitQtyUnit PriceTotal
Foundationsq ft200$19.50$3900.00
Framingsq ft200$15.60$3120.00
Roofingsq ft220$10.40$2288.00
Electrical & Plumbinglump sum1$4550.00$4550.00
Estimated Total$13,858.00

* Prices are estimates based on San Diego market rates. Actual costs may vary based on project specifics.

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Labor line 1

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Material line 1

Line total$3,900

Material line 2

Line total$3,120

Material line 3

Line total$2,288

Material line 4

Line total$4,550

Frequently Asked Questions — Room Addition in San Diego

How much does room addition cost in San Diego, CA?

The average cost for room addition in San Diego, CA ranges from $11,779 to $15,937, depending on project scope, materials, and labor rates. San Diego 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 San Diego?

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.

What factors affect room addition costs in San Diego?

Key factors include project size and complexity, material quality, labor rates in San Diego (CA), permit requirements, accessibility of the work area, and seasonal demand. Getting multiple estimates is recommended.