Estimating Framework for Joinery Workshops

Why systematic estimating matters

Gut-feel quoting produces inconsistent margins. Some jobs are profitable. Others barely cover costs. The difference is usually not the quality of the work — it's whether the quote captured all the real costs before the job started.

The estimating framework

A reliable joinery estimate has four layers: direct materials (every item at invoice cost, not memory), direct labour (hours × your shop rate, not an approximation), direct overheads allocated to this job, and your target gross margin applied correctly — as a divisor, not a markup.

The site measure is part of estimating

The most expensive estimating error isn't in the calculator — it's in the site measurement. Wrong ceiling height. Missed bulkhead. Incorrect wall run length. These mistakes don't show up until fabrication or installation, and they're not recoverable from the client without a variation notice.

Variation management as part of the process

Any scope change that emerges after the quote is signed should trigger a variation notice before the work is done. The estimating process doesn't end when the quote is sent — it continues through every scope change until the job is invoiced.