Site information
lengyan
Author and maintainer profile for lengyan, publisher and cost guide maintainer of 51828 Cost Lab.
Update history
Page maintenance log
Added the maintainer profile, GitHub identity, project motivation, data-handling method, and limits.
The author page should explain why lengyan maintains the project and how page updates are handled.
Author trust review.
51828 Cost Research Desk. Maintained by lengyan.
Found an outdated source, unclear formula, or useful quote example? Send the page URL and details to wwang@51828.com.
Role at 51828
lengyan is the publisher and cost guide maintainer for 51828 Cost Lab. The role covers calculator assumptions, guide structure, source-library updates, example quote templates, and reader correction review.
External profile: github.com/lengyan.
Why I maintain this project
- Many home project cost pages hide the useful planning details behind lead forms or broad averages.
- 51828 is maintained as a practical calculator-first reference so homeowners can understand the scope before talking to contractors.
- The project focuses on transparent formulas, quote comparison, source links, and correction handling rather than contractor matching or paid rankings.
What this author maintains
- Maintain visible calculator formulas for base fee, unit rate, scope, scheduling, and location assumptions.
- Review each guide for quote-comparison usefulness before publishing or updating.
- Check official consumer, safety, licensing, energy, tax, or permit references when they affect homeowner decisions.
- Review reader corrections and adjust pages when a formula assumption, source link, or quote-risk note is outdated or unclear.
How I handle data
- Calculator values are treated as planning models, not guaranteed prices or scraped contractor bids.
- Official sources are used for consumer, safety, licensing, energy, tax, permit, and labor-market context, not as direct quote totals.
- Public market references are paraphrased into short benchmark notes and linked to the original pages.
- Reader-submitted quote examples should remove names, addresses, phone numbers, contractor identifiers, and other personal details before review.
- Corrections are checked against the visible model, source library, related pages, and the homeowner decision task before changes are published.
How pages are reviewed
Each calculator page is maintained for a homeowner decision task: estimate the range, understand what changes the bid, compare written scopes, and know which details to verify locally. Corrections are reviewed against the visible calculator model, official references where relevant, related guide consistency, and the practical question a homeowner is trying to answer before requesting bids.
Limits
51828 is not a licensed contractor, engineering firm, law firm, insurer, tax adviser, or contractor marketplace. Local licensed professionals and written quotes should override online planning estimates.
Contact
For corrections or source updates, email wwang@51828.com. Include the page URL, project location, quote line items if available, and the specific assumption or source that should be reviewed.