Long-lead items are materials and equipment that take significant time to manufacture and deliver – often far longer than the construction work that depends on them. On a commercial fit-out, these items frequently drive the entire schedule, because work can’t proceed until they arrive. Ordering them late is one of the most common causes of fit-out delays.
The usual long-lead culprits on NYC commercial fit-outs include: custom millwork and casework (often 8-12 weeks), electrical switchgear and distribution equipment (which has run 20-40+ weeks in recent years), HVAC units and specialty mechanical equipment (12-20 weeks), custom glass and storefront systems (8-14 weeks), specialty lighting (6-12 weeks), and custom doors and hardware (6-10 weeks). Furniture, while usually owner-provided, can also gate move-in.
For commercial tenants, the practical takeaway is that the most important scheduling decisions happen at the very start of the project, not during construction. Darby identifies long-lead items during preconstruction and gets them ordered early, so procurement runs in parallel with design and permitting rather than delaying construction.
