When a hotel renovation leaves an alcove that does not match a standard sauna footprint, the cost increase depends on what must change—not simply how many centimeters are added. There is no universal surcharge for nonstandard dimensions. A rectangular adjustment that retains existing components generally involves fewer cost drivers than a design requiring new glazing, revised benches, or different heating equipment.

For Custom Saunas, the useful budget figure is the difference between a compliant standard option and the proposed custom unit, including delivery and installation. A factory-price comparison alone can miss costs shifted into packaging, freight, or site work.

Separate dimensional changes from specification upgrades

Ask the manufacturer to quote the nearest suitable standard model alongside the custom layout, keeping timber species, glazing specification, controls, and accessories unchanged wherever technically possible. Otherwise, a supposed dimensional premium may actually include upgraded materials or equipment.

A smaller cabin is not automatically cheaper. Cutting standard panels down can leave unusable offcuts, while narrow layouts may require more detailed bench and door coordination. Ask whether the proposed dimensions improve material yield or introduce additional fabrication steps.

Build a comparable cost difference

Request a quotation breakdown that separates the following:

• One-time engineering: drawing revisions, production detailing, and any setup charges.
• Per-unit changes: timber, glass, insulation, hardware, heating equipment, and fabrication labor.
• Delivery differences: export packing, packed dimensions, shipping weight, freight, and unloading requirements.
• Site changes: electrical work, access constraints, ventilation provisions, and assembly labor.

Dimensional premium (%) = (custom total − comparable standard total) ÷ comparable standard total × 100. Use the same quantity, delivery destination, currency, and scope for both totals. If the standard model cannot fit, treat it as a pricing benchmark rather than a viable alternative.

For repeat orders, have engineering charges shown separately from recurring unit costs. Confirm whether approved drawings can be reused and whether later dimensional revisions trigger another charge. This prevents a prototype quotation from being mistaken for the ongoing purchase price.

Resolve fit before approving fabrication

Send measured site drawings showing finished internal and external dimensions, door swing, service clearances, electrical supply, and the delivery route. Distinguish the available room opening from the finished cabin size; installation gaps and wall construction consume space.

Then request a lower-cost dimensional alternative: a nearby footprint using existing panel sizes, a standard door, or a revised bench arrangement. Accept it only if seating capacity, access, and heater clearances still meet project requirements. Heater sizing must follow the selected equipment manufacturer’s guidance, accounting for volume and exposed glazing—not floor area alone.

Before placing the order, obtain approved drawings and packed dimensions. A cabin that fits its final location but cannot pass through the delivery route can create costs unrelated to the original factory surcharge.