Contact

The fastest way to reach us is email. We read everything, and corrections to a figure or formula get priority.

What we can help with

• A coverage figure, density or price range that looks wrong for your market.
• A formula you want to check — every calculation on the site is shown on the page.
• A calculator you would like to see added.
• Accessibility problems, broken pages or anything that does not work on your device.
• Advertising, licensing or content-use questions.

What we cannot do

We are not contractors and we do not provide quotes, site visits, engineering opinions, or advice on whether a specific structure is safe. For that you need a licensed professional who can look at the actual building. We also cannot tell you what your local building department requires — that is a phone call to them.

Advertising and business

For advertising or partnership enquiries use the same address with “Business” in the subject line. Editorial content on this site is not for sale, and sponsored placement is never disguised as a calculator result.

See also about CostCalc and our privacy policy.