How much does window replacement cost in Knoxville?
ZIP 37921 · Knox County · Tennessee · Data updated May 2026
Window Replacement costs in Knoxville are close to the national average, though local labor runs a bit below the US median.
It's also a strong investment in Knoxville. Homeowners here get solid equity back at resale, making this one of the easier projects to justify financially. November is slow season, so contractors are available and more open to negotiating.
Local Cost Estimate
$13,167 - $17,813
-12% seasonal adjustment (Low season) · Base: $14,962 - $20,242
Strong ROI
Equity Gain
$12,392
Added at resale
+4.2% of home value
Good time to move forward
Strong ROI and off-season pricing. Rates are lower and contractors have open slots.
On this page
- National average
- $17,640
- Local cost index
- 1.08×
- Tennessee median
- ROI score
- 80/100
- Lead time
- ~2.5 weeks
- Low
Built from Zillow ZHVI home values, BLS construction wages (May 2024), Cost vs. Value 2026 benchmarks, and US Census housing data · how this estimate is made
How We Calculate Knoxville Window Replacement Cost Estimates
What's driving the cost
Labor
$6,171
40% of total
Materials
$11,431
60% of total
Construction labor in Knox County is 13% below the US median (BLS OEWS, May 2024).
Over 20 years: approx. $775/yr
Best Time to Book Window Replacement in Knoxville, Tennessee ( November 2026)
Low SeasonLead time now
~2.5
weeks
Season adjustment
-12%
vs annual avg
November is slow season for window replacement in this climate. Lead times drop to about 2.5 weeks, and you're looking at around 12% below peak-season rates.
💡 Good time to book. Pricing is lower and contractors have open slots.
Window Replacement Cost by ZIP Code in Knox County, Tennessee
Same project scope. Costs vary by ZIP based on local labor markets and home values.
Window Replacement Costs in Tennessee, Tennessee
Tennessee's remodeling market runs about 15% below the national average on labor, with Nashville, Memphis, Knoxville, and Chattanooga as the primary markets. Nashville's explosive growth has made it one of the most competitive housing markets in the Southeast, with in-migration buyers bringing higher expectations. The state's mixed climate — mild winters in Nashville, colder in the Appalachian east — creates project demand across all categories.
Window Replacement in this region
Window replacement recoups 70% at resale. Tennessee's mixed climate creates dual-season energy savings on efficient windows. Nashville buyers increasingly factor window condition into pre-offer assessments, particularly on older housing stock in the city's competitive suburban markets.
Window Replacement: Scope, Decisions & Permit Requirements in Tennessee
Scope of work
Window replacement means removing the existing unit, inspecting and repairing the rough opening and sill, installing the new window with proper flashing tape and sealant, then trimming inside and out. Full-frame replacements (removing the entire frame) cost more but address underlying rot and are code-required if the frame is deteriorated. In Knoxville's humid climate, inspect the rough opening carefully before signing off. Moisture migration around windows in southern climates frequently causes hidden rot that adds unexpected remediation cost.
Key decisions
Double-pane is standard. Triple-pane adds R-value but rarely pencils out in warmer climates. Vinyl frames are the most popular choice, low maintenance and well-insulated. Fiberglass outperforms vinyl in extreme temperature swings. Energy Star certified windows qualify for a 30% federal tax credit (up to $600/year). In Knoxville's climate, low-solar-gain glass (SHGC below 0.25) meaningfully reduces cooling load during long summers. This matters more than frame choice in hot-humid markets.
Timing & permits
A full house of replacement windows typically gets installed in one to two days. No permit is usually required for like-for-like replacements. In Knoxville, most installs happen without timing issues year-round. If you're replacing a significant number of windows, scheduling in the fall gives you more contractor availability as spring renovation demand cools off.
Complete guide
Everything you need to know about window replacement: materials, hiring, red flags, and what to expect.
How We Calculate Knoxville Window Replacement Cost Estimates
Step 1
National benchmark
We start with the national average cost for window replacement from the Remodeling Magazine Cost vs. Value report. Base cost: $17,640.
Step 2
Local cost index
We apply a ZIP-level cost multiplier. Labor is derived from BLS construction wage data by metro area; materials from Zillow home value data. Knoxville's effective multiplier is 1.08× the Tennessee median.
Step 3
Regional ROI
The Cost vs. Value report shows that window replacement recoups 70% of its cost at resale in this US Census region. That's an equity gain of $12,392, not counting seasonal adjustment.
Step 4
Seasonal adjustment
November is low season for window replacement in mixed-climate markets. Demand is running -12% vs. the annual average. Base $14,962 - $20,242 → $13,167 - $17,813.
Base estimate
$14,962 - $20,242
Low season
$13,167 - $17,813
All estimates carry a ±15% range to reflect real-world contractor variance in labor, materials, and project scope. Always get 2-3 quotes before committing.
Is a window replacement worth it in Knoxville?
Strong ROIWith an ROI score of 80/100, a window replacement in Knoxville recoups an estimated $12,392 at resale. It's a real improvement to how the house looks and feels, and that shows up in the sale price.
You invest
$15,490
Recouped at resale
$12,392
Cost per year
$775
over 20 yrs
Finding Window Replacement contractors in Knoxville
When you're getting quotes in the 37921 area, expect labor rates to reflect the 1.08× local cost index. Labor rates in Knoxville are on the competitive side for Tennessee. Always verify your contractor is licensed to work in Knox County and ask whether your project scope requires local building permits.
Median home value in Knoxville: $291,622. This project adds 4.2% to your home's value.
More cost estimates for 37921
Frequently Asked Questions
How much does a window replacement cost in Knoxville, TN?
Based on 2026 data, a window replacement in Knoxville (37921) currently runs $13,167 - $17,813, which includes a -12% seasonal factor for November (Low season). Without that, the base range is $14,962 - $20,242. That's using a 1.08× local cost index applied to the national benchmark from the Remodeling Magazine Cost vs. Value report.
Is a window replacement worth it in Knoxville?
With an ROI score of 70/100, a window replacement in Knoxville is expected to add about $12,392 back at resale. A lot of that depends on Knox County's local market, where median home values sit at $291,622.
How do Knoxville remodeling costs compare to the rest of Tennessee?
Knoxville remodeling costs are running at 108% of the Tennessee state median. Local home values of $291,622 are the main driver. Higher home values generally track with higher local wages and material costs.
Can I get a tax credit for new windows?
Yes. Energy Star certified windows qualify for the federal Energy Efficient Home Improvement Credit: 30% of the window cost, up to $600 per year. Ask your contractor to provide Energy Star certification documentation for your tax filing. The credit applies to the product cost, not installation labor.
How many windows can be replaced in a day?
An experienced crew typically replaces 10-15 standard windows per day using insert replacement (keeping the existing frame intact). Full-frame replacements are slower, expect 5-8 per day. For a typical home with 15-20 windows, plan for 1-2 days of work plus any interior trim painting afterward.
What's the best window glass for reducing cooling costs in Knoxville?
Low solar heat gain coefficient (SHGC) glass is the spec to prioritize in Knoxville's climate. Look for SHGC below 0.25. This rating measures how much radiant solar heat passes through the glass. Combined with a low-e coating, this spec can reduce solar heat gain by 60-70% versus standard double-pane.
You have the numbers. Now get the quotes.
Most homeowners go into contractor conversations blind. You know what window replacement should cost in Knoxville, what drives the price, and whether now is a good time to move. Use that.