Wood & Fiberglass Window Replacement cost: Brentwood vs Knoxville (2026)
The two metros aren't quite in sync on wood and fiberglass window replacement: Brentwood sits 2% above Knoxville, or roughly $17,100 versus $16,750 — about $350 apart.
Brentwood TN
Typically around $17,100
Knoxville TN
Lower costTypically around $16,750
Brentwood vs Knoxville: full breakdown
| Factor | Brentwood | Knoxville |
|---|---|---|
| Typical 2026 cost | $17,100 | $16,750 |
| Estimated range | $9,800–$24,350 | $9,600–$23,850 |
| Labor index (vs US) | ×0.97 | ×0.95 |
| Climate zone | Mixed | Mixed |
| Climate factor | ×1 | ×1 |
| Local permit | $125 | $100 |
| Labor share | $9,400 | $9,200 |
| Materials/equipment | $7,700 | $7,550 |
All figures are 2026 localized planning estimates for wood and fiberglass window replacement — get an actual quote before you commit.
Is the gap worth worrying about?
2% is within noise for wood and fiberglass window replacement — contractor selection and timing move the price more than which of these two metros you're in.
Wood and fiberglass window replacement by type: Brentwood vs Knoxville
Below, each wood and fiberglass window replacement option is priced independently for both cities, with identical local labor, climate and permit logic applied — so the comparison holds up.
| Type | Brentwood | Knoxville |
|---|---|---|
| Fiberglass | $9,800–$21,450 | $9,600–$21,000 |
| Composite | $10,800–$22,400 | $10,550–$21,950 |
| Aluminum-clad wood | $12,700–$26,300 | $12,450–$25,750 |
| Solid wood | $13,700–$29,200 | $13,400–$28,600 |
Wood and fiberglass window replacement numbers here are 2026 planning ranges, adjusted per city — useful for budgeting, not a substitute for an actual quote.
Wood and fiberglass window replacement by number of windows: Brentwood vs Knoxville
Wood and fiberglass windows are a premium upgrade — figure roughly $800–$2,500 per window installed depending on material, size, and finish. Cost scales with the number of openings, and wood typically runs higher than fiberglass.
| Size | Brentwood | Knoxville |
|---|---|---|
| 5 windows | $4,500–$10,800 | $4,400–$10,550 |
| 10 windows | $8,850–$19,500 | $8,650–$19,100 |
| 15 windows | $13,200–$27,250 | $12,950–$26,700 |
| 20 windows | $17,550–$35,000 | $17,200–$34,300 |
| 25+ windows (whole home) | $21,450–$43,750 | $21,000–$42,850 |
All figures are 2026 localized planning estimates for wood and fiberglass window replacement — get an actual quote before you commit.
What windows pros earn in each metro
Labor is about 55% of a wood and fiberglass window replacement bill, so local wages drive most of the gap. These are real metro hourly wages for skilled installers (BLS OEWS), not estimates.
Nashville-Davidson--Murfreesboro--Franklin metro · about 6% below the US average installer wage.
No BLS metro wage series for Knoxville; we use Tennessee regional price parity instead.
Source: U.S. Bureau of Labor Statistics, OEWS metro wages for HVAC installers (used as a trade-labor index).
Cheapest time for wood and fiberglass window replacement in either city
Why fall and winter save money: installers are hungry for work and manufacturers are running promotions, and those two discounts happen to overlap in the same off-season window.
How much should new windows really cost you?
Windows are priced by frame, glass and install method — and homeowners often spend on the wrong one. Our editors on what's worth paying for.
The install case
The best window on the market still fails when it's set into a bad opening without proper flashing. If the existing frame is rotted, a full-frame replacement that reseals the opening outlasts a cheap pocket insert every time — let the home's condition, not the lowest bid, decide the method.
The value case
For a whole-home replacement on a fixed budget, vinyl frames with double-pane low-E glass capture nearly all the comfort and efficiency gains at the lowest entry point. Stepping up to fiberglass or triple glazing buys diminishing returns most homeowners never actually notice.
The efficiency case
In extreme climates, triple-pane or premium low-E/gas-fill glass pays back in comfort and bills — and ENERGY STAR units may qualify for rebates. Spend on the glass package before the frame upgrade.
Buy the glass package your climate needs, default to vinyl frames unless you have a reason not to, and never let install quality be the thing you cut to hit a number.
Brentwood vs Knoxville
Is wood and fiberglass window replacement cheaper in Brentwood or Knoxville?
In 2026, wood and fiberglass window replacement is cheaper in Knoxville at about $16,750, versus $17,100 in Brentwood — a difference of about $350 (2%).
Why does wood and fiberglass window replacement cost more in Brentwood than Knoxville?
It comes down to labor: Brentwood indexes at 0.97 against Knoxville's 0.95. The mixed-vs-mixed climate difference, plus permit fees, adds to the gap.
How much is wood and fiberglass window replacement in Brentwood, TN?
In Brentwood, wood and fiberglass window replacement typically runs $9,800–$24,350 in 2026, with most homeowners paying around $17,100.
When is the cheapest time to buy wood and fiberglass window replacement — and does it differ by city?
It doesn't vary by location — Late fall and winter is the discount window in both Brentwood and Knoxville (roughly 5–15% off), while spring and summer peak tends to be the most expensive in either city.
Should I choose where to live based on wood and fiberglass window replacement cost?
That would be a stretch. $350 is a one-time difference, not an ongoing one, and off-season buying plus apples-to-apples bids in Brentwood can close a good chunk of it. What matters more long-term is energy costs, climate and the condition of the home.
Compare wood and fiberglass window replacement in other cities
Updated June 2026 · By Serhat Özçelik