Local research · updated July 2026
Replacement Windows in Philadelphia, Pennsylvania
Philadelphia has one of the oldest housing stocks in the country, and it shapes every window decision here. Roughly 84% of the city's homes were built before 1980, and nearly 300,000 units predate 1940 — the brick rowhouses and narrow trinities that give neighborhoods like Fishtown, South Philadelphia, and Germantown their character. Many still carry their original wood double-hung sashes, weighted and cord-hung, single-glazed and often painted shut. Replacement in Philadelphia is less about fashion than about the constant pull between preserving that historic fabric and getting a drafty, century-old opening to hold heat.
Short answer
In Philadelphia, a standard replacement window (double-hung, casement or slider) typically costs $575–$3,270 installed. Bay and bow windows run $2,875–$9,190+, and a sliding patio door $1,725–$5,740. Frame material and the glass package decide where a project lands in that range.
Planning ranges built from NREL and BLS cost data, localized to Philadelphia with the BEA Regional Price Parity for Philadelphia-Camden-Wilmington, PA-NJ-DE-MD (2024). How we estimate →
84.2%
of Philadelphia homes were built before 1980, the era of single-pane and early aluminum windows
Source: U.S. Census Bureau, 2019–2023 ACS 5-Year Estimates
1949
median year built across Philadelphia's 739,725 housing units
Source: U.S. Census Bureau, 2019–2023 ACS 5-Year Estimates
SHGC ≤ 0.4
the ENERGY STAR v7.0 number that matters most in the North-Central zone
Source: EPA ENERGY STAR v7.0
Window installers in Philadelphia
Compare companies serving Philadelphia. Request a free, no-obligation quote and we route it to the company or a vetted local installer.
| Company | Location | Request a quote |
|---|---|---|
 4.8 · 200,000+ reviews | Glassboro, NJ | Get a quote → |
| 1Champion Replacement Windows of PhiladelphiaChampion | Moorestown, NJ | Get matched → |
| 2Pella Windows and Doors Showroom of Cherry Hill, NJPella | Cherry Hill Township, NJ | Get matched → |
| 3Pella Windows and Doors Showroom of Langhorne, PAPella | Langhorne, PA | Get matched → |
| 4Pella Windows and Doors Showroom of Plymouth Meeting, PAPella | Plymouth Meeting, PA | Get matched → |
| 5Pella Windows and Doors Showroom of Wilmington, DEPella | Wilmington, DE | Get matched → |
| 6Power Home RemodelingPower Home Remodeling | Chester, PA | Get matched → |
| 7Window NationWindow Nation | Pennsauken, NJ | Get matched → |
| 8Window World of Northern DelawareWindow World | Wilmington, DE | Get matched → |
| 9Window World of PhiladelphiaWindow World | Horsham, PA | Get matched → |
Renewal by Andersen Window Replacement
4.8 · 200,000+ reviewsShowrooms in Glassboro, King of Prussia, Shamong & Newark · serving the Philadelphia metro
Full-service manufacturer and installer, transferable warranty, local crews. Why it's our Top Pick
Get a quote →Listings compiled from manufacturer dealer locators and public business records. Premier and Sponsored Partners pay for placement and are labeled as such; star ratings shown are reported by the partner, with the source and date beside them. See our advertising disclosure. Contacting a company shares your details with it (or a vetted local installer) so it can reach you about your project.
Are you a window company? Claim your listing to take quote requests from Philadelphia homeowners directly.
What drives window decisions in Philadelphia
- The dominant housing type is the pre-war brick rowhouse or trinity with original wood double-hung windows; masonry openings are rarely perfectly square, and full-frame work often means dealing with brick, old lintels, and non-standard sizes.
- Designated historic properties and homes in local historic districts (Society Hill, Old City, and others) fall under Philadelphia Historical Commission review, which can constrain frame material, sightlines, and profile — and add weeks to the timeline.
- The IECC 4A mixed-humid climate brings hot, humid summers and freeze-thaw winters; older wood sashes are prone to rot, seized cords, and air leakage, while insulated glass units in earlier replacements eventually fail and fog.
- For historic rowhouses, the real decision is often storm windows (interior or exterior) over restored originals versus full replacement — a genuine trade-off between cost, character, and energy performance rather than a foregone conclusion.
Replacement windows & doors by type in Philadelphia
Local cost ranges and North-Central-zone efficiency guidance for each window and door style, specific to Philadelphia homes:
Ranges localized to Philadelphia's cost level: national planning ranges shifted by the BEA Regional Price Parity for Philadelphia-Camden-Wilmington, PA-NJ-DE-MD (102.6, U.S. = 100; 2024). How we estimate local costs →
Efficiency requirements for Philadelphia's climate
Philadelphia sits in the ENERGY STAR North-Central zone (IECC zone 4A (mixed, moist), Philadelphia County). Under the v7.0 specification, qualifying windows need a U-factor of 0.25 or lower and an SHGC of 0.4 or lower. Mixed climate: good insulation matters most, with a moderate cap on solar gain so summer cooling costs stay in check.
Not sure what these numbers mean? Read our plain-English guide to U-factor and SHGC.
What replacement windows cost here
Old masonry openings, non-standard sizes, and the labor of removing weighted wood sashes push Philadelphia projects toward the higher, full-frame end of national NREL cost ranges rather than simple insert swaps. Historic sashes and lead-paint-era wood add prep time, and any city work runs through the Department of Licenses & Inspections permit process — with added Historical Commission review for designated properties. Regional labor rates sit above the national average, so budget for the opening and the permit path, not just the glass.
For a breakdown by frame material and install type, see our full cost guide.
Rebates & incentives in Pennsylvania
The federal window tax credit (25C) ended for projects placed in service after December 31, 2025. If your windows were installed in 2025, you can still claim it on your 2025 return — but for new projects there is no federal window credit. State and utility programs are now the main source of window incentives.
Pennsylvania has been standing up IRA Home Energy Rebate programs through the state; windows can qualify as part of a modeled whole-home efficiency retrofit. Verify current availability before promising rebate money.
- Act 129 utility efficiency programs (PECO and others). Pennsylvania's Act 129 requires electric utilities such as PECO to run energy-efficiency programs; audits and envelope work are incentivized, with windows generally part of a broader package. (PA PUC Act 129; PECO / PGW program pages)
Pennsylvania enforces the statewide Uniform Construction Code (UCC) based on the IECC; Philadelphia permits through Licenses & Inspections, and its Historical Commission reviews designated historic properties.
Replacement windows in nearby metros
Not in Philadelphia proper? These nearby markets carry the same local research: housing-age data, climate-zone specs, and current rebate status for each city:
Philadelphia window replacement FAQ
›Do I need a permit to replace windows in Philadelphia?
For a like-for-like replacement in a one- or two-family home that keeps the same size and location, the city's Department of Licenses & Inspections (L&I) offers a streamlined "EZ" permit path. Changing the opening size, style, or location generally requires a standard building permit. If your property is on the Philadelphia Register of Historic Places or in a local historic district, the EZ path does not apply — the work must first clear Philadelphia Historical Commission review. Confirm current requirements with L&I before ordering, since rules and processes change.
›Can I replace windows in a historic rowhouse without losing its character?
Often, yes, but the details matter. For designated historic properties, the Philadelphia Historical Commission reviews window work and typically looks at material, sightlines, muntin profile, and how closely a replacement matches the original — staff can approve many applications, while others go to the Architectural Committee and a public hearing. Many owners of pre-war rowhouses weigh restoring the original wood sashes and adding storm windows against full replacement; restoration with storms preserves character and can meaningfully cut drafts, while replacement offers modern efficiency. There is no single right answer — it depends on sash condition, your neighborhood's rules, and budget.
›What efficiency numbers should replacement windows hit in Philadelphia?
Philadelphia falls in the ENERGY STAR North-Central climate zone (IECC 4A). For that zone, the current ENERGY STAR v7.0 residential targets are a U-factor of 0.25 or lower and a Solar Heat Gain Coefficient (SHGC) of 0.40 or lower. Those numbers balance the region's cold winters and warm, humid summers; look for the NFRC label listing both values, and verify against the latest ENERGY STAR criteria, which are periodically revised.
›Are there tax credits or incentives for window replacement in Pennsylvania?
The federal 25C Energy Efficient Home Improvement Credit that covered qualifying windows expired December 31, 2025, so there is no longer a federal window tax credit for new projects. In Pennsylvania, incentives now generally come from state and utility programs — for example, energy-efficiency and rebate offerings from local utilities such as PECO (electric) and Philadelphia Gas Works (PGW), and Pennsylvania's rollout of the federal IRA Home Energy Rebates. Program availability, eligibility, and amounts change frequently, so check directly with your utility and the state before counting on any specific incentive.
Sources
- — U.S. Census Bureau, American Community Survey 5-Year Estimates (B25034, B25035)
- — EPA ENERGY STAR Version 7.0 Residential Windows specification
- — DOE/PNNL IECC climate zone assignments by county
- — IRS, 25C Energy Efficient Home Improvement Credit (P.L. 119-21)