How we build an estimate
Every calculator shows a planning range, not a quote. This page explains where the numbers come from, how they are combined, and where the limits are.
Last reviewed: October 2026.
What the numbers are
The calculators produce a low-to-high planning band for a typical project. They are built from published material prices, contractor labor ranges, and project formulas. They are not live supplier quotes, contractor bids, or guarantees.
A range is intentional. Local labor, site access, material grade, permits, and schedule can move a real bid by 20–40 percent or more. A precise-looking single number would hide that uncertainty.
How a range is built
- Material cost. Unit prices for the material, fasteners, and consumables, multiplied by the quantity from your dimensions. Waste is added where cuts and breakage are normal.
- Labor. Published contractor ranges, expressed per square foot, linear foot, or hour. Fence estimates also apply a state cost index; landscape materials are priced nationally because bulk soil and stone markets vary less predictably.
- Project logic. Gate posts, concrete volume, base depth, stairs, removal, and a permit allowance are added from the dimensions you enter, not from a fixed package.
- Rounding. The result is rounded to a planning band. The low and high ends are not statistical confidence intervals.
Source hierarchy
We prefer sources in this order: industry associations and public labor data, then published cost guides, then retailer listings. Each calculator page links to the source categories used for that page.
- BLS Occupational Employment and Wage Statistics for wage benchmarks.
- NRMCA and QUIKRETE for concrete yields and practice.
- ICPI for paver base and bedding guidance, and AWC for wood framing.
- Published cost guides such as HomeGuide and Angi for cross-checking installed ranges.
Review status
Each source block is labeled either planning estimate or calibrated. A planning estimate means the range is a defensible starting point but has not yet been checked against two independent sources for every line. Calibrated means the line items have been checked against at least two sources and a dated record is kept in our price log.
We review material prices quarterly, labor and permit ranges annually, and update a page when a reader sends a credible local correction.
What the numbers do not include
- Engineering, architectural, or soil reports.
- Permit fees that vary by jurisdiction, beyond a flat allowance.
- HOA fees, surveys, easements, or property-line work.
- Taxes, financing, contractor markups, or change orders.
- Rock, slopes, drainage, tree removal, or other site conditions.
- Premium finishes, custom hardware, or design fees.
Corrections
If a range is materially off in your market, send the source (a local quote, a supplier listing, or a permit fee schedule) to[email protected]. We review corrections and update the page when the source holds up.
Read more about OutdoorCalc or see theeditorial team.