This page states the limits of what we publish, in plain terms. It exists because cost estimates are easy to misread as quotes.
A published range describes what typical residential work of that specification costs in a typical US market. It does not describe your project. Two houses on the same street with the same window count can differ by 40% because of access, wall condition, trim, and code requirements.
| Situation | Why the estimate fails |
|---|---|
| Opening size is changing | Requires framing and header work that no per-window model captures. |
| Rotted framing or sill | Only discoverable on demolition. Can add $300–$1,500 per opening. |
| Pre-1978 housing | Lead-safe practices add $50–$150 per opening and are legally required. |
| Historic district | Profile matching, wood retention, and review can double labor. |
| Second or third story with difficult access | Scaffolding, lifts, and roof work are not in the model. |
| Impact or hurricane zone | Rated assemblies and engineering costs are outside the base model. |
| Stucco, brick, or EIFS exterior | Exterior repair and re-finishing after replacement is a separate trade. |
We do not install windows, inspect properties, or provide project-specific advice. We cannot evaluate a contractor's bid or mediate a dispute. For those, use a licensed local professional.
This site earns money from display advertising and from referral fees when visitors request quotes through our forms. That commercial relationship does not influence published ranges; the full policy is on How We Make Money and Editorial Policy.
Code requirements and energy incentive programs change. Descriptions here reflect published code text and program documentation at the time of writing. Your local building department and the current program administrator control. Verify before relying on any requirement or incentive.
If a figure or statement is wrong, tell us: corrections@windowcosthq.com. Evidence-based corrections are published with a dated note.