Prioritize location (proximity to motorway and ports), transit time performance, WMS/API integration, ability to scale labor and storage, SLA metrics (pick accuracy, lead times), returns handling, and transparent rate cards. Also validate cross‑border experience and carrier network for both retail and B2B lanes.

Lisburn generally offers more competitive rents than Dublin and comparable or slightly lower costs than central Belfast, with access to an adequate labor pool for fulfillment shifts. Lower facility costs can translate to better per‑unit economics but confirm service levels and overtime labor availability for peaks.

Expect strong road connectivity via the M1 for pallet and parcel carriers, close access to Belfast Port for short‑sea or ferry routes, and proximity to Belfast International Airport for time‑sensitive freight. Most 3PLs provide multi‑carrier options, pallet networks, and consolidated export services.

Look for WMS with real‑time inventory APIs, barcode scanning, zone and wave picking, automated replenishment, kitting and light assembly, bonded areas if needed, and seamless order management integrations with marketplaces and carriers to ensure accurate, fast fulfillment.

Onboarding often ranges from 4–12 weeks depending on order volume and complexity. Minimize disruption by appointing a dedicated project manager, conducting parallel fulfillment during cutover, validating data mappings and EDI/API connections, running test orders, and agreeing clear acceptance criteria and escalation paths.