Budget planning guide

Room Addition cost in Philadelphia, PA

A transparent starter-scope range for homeowners planning room addition in Philadelphia, PA. Review the assumptions, then use the project estimator for your own scope.

Starter-scope range

$10,420–$14,710

Planning midpoint: $12,260

The planning model keeps this market close to its national starter assumptions.

What the model includes

Starter scope and assumptions

Adjust quantities for your project

Foundation

200 sq ft × $17.25

$3,450

Framing

200 sq ft × $13.8

$2,760

Roofing

220 sq ft × $9.2

$2,020

Electrical & Plumbing

1 lump sum × $4,025

$4,030

This is a budgeting example based on a defined starter scope, not a quote or a live survey of local bids. Actual pricing depends on measurements, site conditions, material choices, permits, contractor availability, and the final scope.

Local guides

Compare starter scopes by city

New York, NYLos Angeles, CAChicago, ILHouston, TXPhoenix, AZSan Antonio, TXSan Diego, CADallas, TX

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