Editorial policy

Every number has a source

Every cost figure, wage, fee and housing figure on the site is tied to a named source and links to the Sources list at the bottom of its page. A figure with no source does not get published. Figures fall into two classes, and each page labels which one it shows:

• Published prices: what a plumbing company, a permit office or a government agency publishes. We keep the publisher, the link and the date we read it.
• Estimates: the output of our formula, which combines published prices, wages and permit fees. An estimate is always shown as a low–high range with a midpoint, never as one figure.

The full method is on the methodology page.

Rounding and thin data

Dollar estimates are rounded to the nearest hundred dollars in text, and per-fixture prices to the nearest ten dollars. A state without enough published prices of its own uses national prices scaled by plumber wages in that state, and its page says so in a notice above the figures. A state with no permit schedule we could read gets no page until we find one.

Other published estimates

Cost figures from other websites are never blended into ours. Where we show them, they sit in a separate table labeled with the publisher's name.

What we do not claim

We do not rank PEX against copper. We do not say a house has a given pipe because of when it was built. We do not make health claims about a pipe material unless a government source makes them, and we do not give a pipe lifespan without a source.

Updates and corrections

Each page shows the date it last changed. We re-read sources at least once a year. When a reader reports an error and the source confirms it, we fix the page and update its date. To report one, use the contact page. For the national figures, see repipe costs.

Reviews and credentials

No page carries a "reviewed by" line, because no licensed plumber reviews the content today. If one does in future, we will name them on the about page and on each page they review, with their license number and a link to the license record.