Philadelphia, PA · Updated 2026

How Much Does Room Addition Cost in Philadelphia, PA?

Average room addition costs in Philadelphia range from $10,420 to $14,098. Get a free, customized estimate below.

15% above national averageFree · No Signup Required

Room Addition Cost Breakdown — Philadelphia, PA

ItemUnitQtyUnit PriceTotal
Foundationsq ft200$17.25$3450.00
Framingsq ft200$13.80$2760.00
Roofingsq ft220$9.20$2024.00
Electrical & Plumbinglump sum1$4025.00$4025.00
Estimated Total$12,259.00

* Prices are estimates based on Philadelphia 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$3,450

Material line 2

Line total$2,760

Material line 3

Line total$2,024

Material line 4

Line total$4,025

Frequently Asked Questions — Room Addition in Philadelphia

How much does room addition cost in Philadelphia, PA?

The average cost for room addition in Philadelphia, PA ranges from $10,420 to $14,098, depending on project scope, materials, and labor rates. Philadelphia 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 Philadelphia?

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 Philadelphia?

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