Windows
How many windows do people actually replace at once?
Across 489 Phoenix-area homeowners who told us their project size, 69% were doing six or more windows in one go. Only 54 were doing one or two.
That is not because everyone here has money to spend — it is because mobilization, permits, disposal and crew time are largely fixed costs, and splitting a job in two means paying them twice.
Vincenzo DiGennaro · Renmark · ROC 364596 · Last updated September 15, 2026
Free price check
See what your windows come to.
But "most people do six or more" is not advice, and we are not going to pretend it is. There are good reasons to do three windows, and this page covers those too.
The actual distribution
This is our own intake data. No cost aggregator has it, because they do not talk to anybody.
| Project size | Homeowners |
|---|---|
| Six to ten windows | 182 |
| Whole house | 157 |
| One or two windows | 54 |
| All other sizes | the remainder of 489 |
| Six or more, combined | 69% |
Source: Renmark intake responses, Phoenix metro. Self-reported by homeowners; internal and test entries excluded. Counts, not prices — we do not publish our own figures, here or anywhere on this site.
Two clusters, not a spread. People here overwhelmingly either do a meaningful chunk of the house at once, or they do one or two problem windows. The middle — three, four, five — is thinner than you would expect.
That shape makes sense once you understand the cost structure, which almost nobody explains.
Why partial jobs cost more per window. Every time.
Mobilization, permits, disposal and crew time are largely fixed. They do not scale down with the number of openings.
A crew still has to be dispatched, still has to arrive, still has to set up and protect the work area, still has to load out and dispose of the old units, and somebody still has to measure, order and schedule. Spread across four openings, those costs are punishing. Spread across fourteen, they nearly disappear.
That is arithmetic, not a penalty, and it has two consequences people get wrong in opposite directions:
- A per-window figure taken off a whole-house project and applied to your three-window job will be too low. This is how the internet's window cost pages mislead — a "$600 per window" figure quoted without a job count is almost meaningless.
- A per-window figure from a small job applied to a whole house will be too high. Which is why anyone quoting you per window, without seeing how many, is advertising rather than quoting.
You can see the effect in the one published national source that states a job count: Fixr puts a 10–15 window project at $8,000–$12,000 while quoting a per-window range of $450–$1,200. And a Phoenix installer publishing a flat, checkable price — $899 per window, capped at 120 united inches, three-window minimum — lands a 10–15 window job at $9,000–$13,500. Both figures, with dates and what is wrong with every other published number in this market, are on the Arizona window replacement cost guide.
Check yours
Skip the averages. Get the number for your actual openings.
When doing a few is the right call anyway
We would rather say this plainly than sell you a whole house you do not need.
Do a partial job when:
- Two or three west-facing openings are doing all the damage and the rest of the house is genuinely sound. West and south elevations take the worst of it here and they fail first — that is not a coincidence, it is sun exposure.
- A couple of units have fogged and the rest are clear. Seal failure is a chemistry-and-heat problem, not a wear problem, and it does not arrive on a schedule across the whole house at once. What it does do is cluster by elevation. See why windows fog between the panes.
- You are selling in the spring. A rental or a house you are listing does not need a lifetime warranty. That is a legitimate call and we will tell you so.
- Cash flow is the constraint. Doing the worst elevation now and the rest in two years costs more in total than doing it once — but "more in total" is not the same as "wrong," and anyone who cannot acknowledge that is selling.
Do the larger job when:
- Several windows on the same elevation have already failed. The rest of that elevation is usually close behind, and you will be paying mobilization twice within a couple of years.
- The frames are the problem, not the glass. Across 472 Phoenix-area homeowners who told us what their frames are made of, about 60% — 281 — have metal, and 161 of those are twenty-plus years old. Federal guidance is blunt: "metal or aluminum window frames conduct heat very rapidly, which makes metal a very poor insulating material", and such frames "should have a thermal break" — many here do not. That is a whole-elevation condition, not a one-window condition. How to check yours: metal window frames in Arizona.
- You were going to do it within a couple of years anyway. Then the only question is whether you pay the fixed costs once or twice.
Why your whole street seems to be doing this at the same time
Window age tracks build era almost exactly, and Valley build eras are unusually concentrated by city.
| Area | Median year built | Dominant era |
|---|---|---|
| Sun City CDP | 1973 | 86.7% built 1960–79 |
| Tempe | 1984 | 46.1% built 1970–89 — 63.1% predates 1990 |
| Phoenix | 1985 | volume in every decade since the 1950s — no single story |
| Glendale | 1986 | 67.6% built 1970–99 |
| Mesa | 1989 | 60.7% built 1970–99 |
| Sun City West CDP | 1989 | 64.0% built 1980–99 |
| Scottsdale | 1991 | 43.9% built 1980–99 |
| Fountain Hills town | 1994 | 58.4% built 1980–99; almost nothing predates 1970 |
| Chandler | 1997 | 53.3% built 1990–2009 |
| Peoria | 1999 | 52.0% built 1990–2009 |
| Avondale | 2002 | 41.9% built 2000–09 alone |
| Gilbert town | 2003 | 62.0% built 1990–2009 |
| Surprise | 2005 | 53.4% of all homes built in one decade, 2000–09 — 33,151 houses |
| Goodyear | 2007 | 70.6% built 2000–19 |
| Buckeye | 2011 | 90.3% built 2000 or later |
Source: US Census Bureau, American Community Survey 2020–2024, tables B25034 and B25035. Year built is occupant-reported — read at decade level, not parcel level.
Surprise is the sharpest case: thirty-three thousand homes went up inside one decade with the same builder specification in them, and they are crossing twenty years together. If three neighbours are all getting quotes this month, that is a cohort, not a trend.
Phoenix proper is the opposite — no cohort above 18.6% — so "Phoenix homes were built in…" is a sentence that is wrong for most of Phoenix.
How to decide, in about ten minutes
- Walk the outside of the house and note which elevations face west and south. Those are your likely failures.
- Look at each window for haze or a watermark shape between the panes. That is a failed seal and it cannot be repaired.
- Open each sash. Dragging, sticking or a sash that will not latch is a hardware or frame problem, not a glass problem.
- Check the frame material, and if it is metal, check for a thermal break — a continuous plastic strip separating the outside metal from the inside metal on the sash edge.
- Count what is actually failing versus what is merely old. Those are different lists, and a bidder who never separates them is not thinking about your house.
Then get three quotes, itemised the same way — each opening priced separately, retrofit or full-frame stated, product line named, NFRC numbers in writing. The full list is on what a window quote should include.
And ask every bidder to price two scopes: the windows that are failing, and the whole elevation. Seeing both numbers side by side is how you find out whether the fixed-cost argument actually applies to your house, rather than taking anyone's word for it — ours included.
No phone call
The 2026 Phoenix Door, Window & Roof Cost Guide
Every published cost figure in this market, with its date and what is wrong with it.
Common questions
Frequently asked
- How many windows do most people replace at once?
- Of 489 Phoenix-area homeowners who told us, 69% did six or more — 182 in the six-to-ten range and 157 doing the whole house. Only 54 did one or two.
- Is it cheaper per window to do more at once?
- Yes, and the reason is structural rather than a volume discount. Mobilization, permits, disposal and crew time are largely fixed, so they spread across more openings. Partial jobs cost more per window every time.
- Can I just replace the two bad ones?
- Yes. There is no rule that says whole-house, and if two west-facing openings are doing the damage while the rest are sound, that is the right job. Just expect a higher per-window cost and ask what the bidder is seeing on the rest of that elevation.
- Should I do it in phases to spread the cost?
- You can, and sometimes cash flow makes that the right decision. Understand the trade: you will pay the fixed costs twice. Ask for both scopes priced so you are choosing with real numbers rather than a rule of thumb.
- Why do so many of my neighbours seem to need windows at the same time?
- Because your houses were built in the same few years with the same specification in them. Valley build eras are unusually concentrated — Surprise put 53.4% of its entire housing stock up in a single decade.
- What is the minimum job?
- Three windows. For doors it is one, because a single door does not carry the same per-unit penalty that a single window does.
Next step
See what your windows would actually cost.
A few questions, about a minute. No call required to get your number.