ESTIMATES
Window Replacement Estimates You Can Actually Compare
Most window quotes are not comparable, because no two describe the same job. This is the checklist that makes them comparable, and the questions that surface what is missing.
- This page collects nothing
- No obligation of any kind
- Independent of any manufacturer
Before you book a visit
Three things decide whether the quotes you collect can be compared at all.
- Decide insert or full-frame before anyone quotes.
- Give every company the same opening count.
- Ask each one for the ratings printed on the units.
There is no form on this page. Nothing here asks for a name, an address or a phone number.
What should a window replacement estimate include?
Eleven line items. A quote missing any of them is a quote you cannot check.
The scope, in one sentence
Insert into the existing frames, or full-frame replacement. Different jobs at different prices, and the usual explanation for a gap.
The product, by name
Manufacturer, product line, frame material and operating style. A brand is not a specification: every maker sells several lines.
Every opening, listed
Room, rough size and style for every window in the price. Without it you cannot tell whether two quotes cover the same openings.
The performance numbers
The ratings printed on the units quoted, per line item, not the range a brochure advertises across a catalog.
Labor, separately
What the installation charge covers: removal, fitting, sealing and trim. A bundled figure hides where a cheaper quote saved money.
Removal and disposal
Whether taking the old units away is in the price or billed after it. If one quote includes it and another does not, the cheaper number is not cheaper.
Making good
How the interior casing and the exterior are finished, and whether decoration is included. The most common source of an unhappy final week.
Who pulls the permit
Whether one is needed is decided locally, so the estimate must say who finds out, who files it and whether the fee is included.
The two warranties
Product and labor are usually warranted separately, by different companies. Ask which covers what, and who you call.
The payment schedule
Deposit, stages and balance, and what each stage is tied to. A schedule tied to completion behaves differently from one tied to dates.
What happens if the frame is rotten
The change-order rule, in writing, before work starts: how extra work is priced and who authorizes it with the house already open.
Put every quote on the same scope first
The mistake that costs homeowners the most is collecting three quotes and then trying to reconcile them. By that point each company has priced its own idea of the job. Fix the brief yourself — how many openings, whether the frames stay or go, what the glass has to achieve where you live — then give that same brief to everybody. A company that recommends something different may have seen something the others walked past; what matters is that the deviation is explained rather than priced in silently.
How many quotes should I get?
Plenty of sites print a number here. We looked for a consumer-protection or state authority that recommends one for window work and did not find it, so this page describes the judgement instead of faking the citation. What you want is the shape of your local market: where the middle sits, and whether one company is describing a materially different job. Keep going until the quotes stop surprising you, and make sure at least one comes from a different kind of business than the others.
- A specialist installer and a general contractor price from different overheads
- One outlier tells you less than three documents that agree on scope
What questions should I ask a window contractor?
Ten questions, on the visit, with the answers written onto the estimate rather than remembered.
- Is this an insert into my existing frames, or a full-frame replacement?
- Which product line is this, and what changes one line up or down?
- What are the rated numbers for the exact units on this quote?
- Who measures, and who carries the cost if a unit is measured wrong?
- What happens to the price if the framing behind the trim is rotten?
- Is removal and disposal of the old windows included in this figure?
- How are the inside casing and the outside finished, and is decoration included?
- Who checks whether a permit is required, and who files it?
- What does each warranty cover, and who honors each one?
- Is the crew employed or subcontracted, and who supervises on the day?
What a correct installation involves is on the window installation page, and the rules that change by jurisdiction are on the locations pages.
When one number sits far below the others
A low figure is not evidence of anything on its own. It is a prompt to find the missing line.
What a low number can legitimately mean
- A retrofit quoted where the others quoted full-frame
- A different product line from the same manufacturer
- A smaller opening count, with one room left out
- Lower overheads at a smaller or more local business
- A quieter season, with the crew available sooner
What it can also mean
- Disposal, making good or decoration billed separately
- Measurements taken by you rather than by the company
- A change-order rule nobody has written down yet
- A warranty that covers the product but not the labor
- A scope that quietly excludes the awkward upstairs opening
Estimate questions
Walk in with the checklist, not the brochure
The estimate you can check is worth more than the estimate that arrives first.