Almost every joiner who works to order hears the same question. To the client it seems reasonable: the piece is made by hand anyway, so what difference can a few centimetres make? In practice a custom size starts a different chain of processes — from design and cutting through to assembly — and at every stage it costs more than serial production does. Here is why, and what the client is actually paying for.
Design
When a client brings individual requirements, the first thing the maker meets is the drawing. Even a change of five millimetres in width means a new design: proportions recalculated, part dimensions revised, loads checked again. Production needs new drawings, new cutting plans, new specifications for bought-in components. If any of the affected parts are made on the CNC, their programs have to be written from scratch. Designing one custom table can take several dozen man-hours of qualified engineering work.
Serial production breaks down
Every machine in a joinery workshop is set up for series. The jigs, templates, stops and the order of operations all exist to make a flow of identical pieces fast and error-free. After the design comes the job of rebuilding that whole arrangement, and rebuilding always ends in testing and adjustment — which costs time and material. Skip it and the chance of a mistake multiplies. And the mistake itself is expensive.
Assembly
Assembly relies on jigs that hold parts in position and clamp them rigidly while the glue sets. Building the Catalina table, for instance, uses four kinds of jig, two of them tied directly to the length of the rails — which is itself derived from the width of the table.
And if the client wants a say in the grain, the maker goes through a large stack of boards with them: moving boards from pile to pile, showing, discussing, offering them up. With some clients that takes more than a day, and all of it is production cost. Very often the piece of board they want isn't at the edge but nearer the middle, which increases offcuts and the material consumed. Another client may want a top made of quarter-sawn boards — these are around 15% of everything delivered, and ordered separately they can cost up to 70% more than ordinary flat-sawn stock.
What you actually get
So the gap between a standard and a custom piece is not a surcharge for a whim. It reflects real additional cost: time, material, risk. But the more interesting question is not what the client pays for — it is what they end up with.
A custom order is a piece designed for a particular job, rather than adjusted to fit it afterwards. The dimensions are worked out for a specific space: an alcove, an opening, a wall. The structure is recalculated for those dimensions, so rigidity and durability are not sacrificed to unusual proportions. And if the grain matters to the client, they choose the boards and the figure themselves — and get exactly the texture they wanted, not the one somebody else chose.
The client doesn't simply wait for a finished piece. They take part in making it, at every stage, through video reports on the work in progress: from choosing the material to final assembly and the finishing coat. It is a chance to watch their future furniture come into being — and, if needed, to discuss the details and change something before the piece is done.